Merge branch 'master' of /home/jwagantall/linuxfoundation/onap/IT-21112/sli-core

Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>

6 files changed, 2054 insertions, 0 deletions

diff --git a/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SliPluginUtils.java b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SliPluginUtils.java
new file mode 100644
index 000000000..2edb36dc4
--- /dev/null
+++ b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SliPluginUtils.java
@@ -0,0 +1,1178 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : CCSDK
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights
+ * 						reserved.
+ * ================================================================================
+ * Modifications Copyright (C) 2018 IBM.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.slipluginutils;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.PrintStream;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Objects;
+import java.util.Properties;
+import java.util.Set;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.text.StringEscapeUtils;
+import org.onap.ccsdk.sli.core.sli.SvcLogicConstants;
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+import org.onap.ccsdk.sli.core.sli.SvcLogicException;
+import org.onap.ccsdk.sli.core.sli.SvcLogicJavaPlugin;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParser;
+
+/**
+ * A utility class used to streamline the interface between Java plugins,
+ * the Service Logic Context, and Directed Graphs.
+ * @version 7.0.1
+ * @see org.onap.ccsdk.sli.core.sli.SvcLogicContext
+ */
+public class SliPluginUtils implements SvcLogicJavaPlugin {
+	public enum LogLevel {
+		TRACE, DEBUG, INFO, WARN, ERROR;
+	}
+
+	private static final Logger LOG = LoggerFactory.getLogger(SliPluginUtils.class);
+	private static final String LOG_MSG="extracting list from context memory";
+	private static final String LOG_MSG1="removing elements from list";
+	private static final String LENGTH="_length";
+    public static final String CTX_NULL_VALUE="";
+
+
+	// ========== CONSTRUCTORS ==========
+
+	public SliPluginUtils() {}
+
+	public SliPluginUtils( Properties props ) {}
+
+
+	// ========== CONTEXT MEMORY FUNCTIONS ==========
+
+	/**
+	 * Removes 1 or more elements from a list in context memory.
+	 * <p>
+	 * Values are removed based on either the index in the list, a key-value
+	 * pair, or a list of key-value pairs that all must match in the element.
+	 * @param parameters
+	 * @param ctx Reference to context memory
+	 * @throws SvcLogicException All exceptions are wrapped in
+	 * SvcLogicException for compatibility with SLI.
+	 * @since 7.0.1
+	 */
+	public void ctxListRemove( Map<String,String> parameters, SvcLogicContext ctx ) throws SvcLogicException {
+		try{
+			LOG.debug( "ENTERING Execute Node \"ctxListRemove\"" );
+
+			// Validate, Log, & read parameters
+			checkParameters(parameters, new String[]{"list_pfx"}, LOG);
+			logExecuteNodeParameters(parameters, LOG, LogLevel.DEBUG);
+			String list_pfx = parameters.get("list_pfx");
+			String param_index = parameters.get("index");
+			String param_key = parameters.get("key");
+			String param_value = parameters.get("value");
+			String param_keys_length = parameters.get("keys_length");
+
+			// Initialize context memory list mimic
+			SvcLogicContextList list;
+
+			// Process based on input parameters:
+			//   index: remove object at specific index
+			//   key & value: remove all objects with key-value pair
+			//   keys_length: remove all objects that match all key-value pairs
+			//                in list
+			if( param_index != null ) {
+				// Parse index
+				LOG.trace("executing remove by index logic");
+				int index;
+				try {
+					index = Integer.parseInt(param_index);
+				}
+				catch( NumberFormatException e ) {
+					throw new IllegalArgumentException("\"index\" parameter is not a number. index = " + param_index, e);
+				}
+
+				// Extract list from context memory & remove object @ index
+				LOG.trace(LOG_MSG);
+				list = SvcLogicContextList.extract(ctx, list_pfx);
+				LOG.trace(LOG_MSG1);
+				list.remove(index);
+			}
+			else if( param_value != null ) {
+				if( param_key == null ) { param_key = ""; }
+
+				// Extract list from context memory & remove objects with
+				// key-value pair
+				LOG.trace("executing remove by key-value pair logic");
+				LOG.trace(LOG_MSG);
+				list = SvcLogicContextList.extract(ctx, list_pfx);
+				LOG.trace(LOG_MSG1);
+				list.remove( param_key, param_value );
+			}
+			else if( param_keys_length != null ) {
+				// Parse keys_length
+				LOG.trace("executing remove by key-value pair list logic");
+				int keys_length;
+				try {
+					keys_length = Integer.parseInt(param_keys_length);
+				}
+				catch( NumberFormatException e ) {
+					throw new IllegalArgumentException("\"keys_length\" parameters is not a number. keys_length = " + param_keys_length, e);
+				}
+
+				// Obtain key-value pairs to check from parameters
+				LOG.trace("reading keys parameter list");
+				HashMap<String,String> keys_values = new HashMap<>();
+				for( int i = 0; i < keys_length; i++ ) {
+					keys_values.put(parameters.get("keys[" + i + "].key"), parameters.get("keys[" + i + "].value"));
+				}
+
+				// Extract list from context memory & remove objects with all
+				// key-value pairs matching
+				LOG.trace(LOG_MSG);
+				list = SvcLogicContextList.extract(ctx, list_pfx);
+				LOG.trace(LOG_MSG1);
+				list.remove(keys_values);
+			}
+			else {
+				throw new IllegalArgumentException("Required parameters missing. Requires one of: index, key & value, or keys_length array");
+			}
+
+			// Remove index from list
+			LOG.trace("writing list back into context memory");
+			list.writeToContext(ctx);
+		}
+		catch( Exception e ) {
+			throw new SvcLogicException( "An error occurred in the ctxListRemove Execute node", e );
+		}
+		finally {
+			LOG.debug( "EXITING Execute Node \"ctxListRemove\"" );
+		}
+	}
+
+    /**
+     * ctxSortList
+     * @param parameters - the set of required parameters must contain list and delimiter.
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException if a required parameter is missing an exception is thrown
+     */
+	public void ctxSortList( Map<String, String> parameters, SvcLogicContext ctx ) throws SvcLogicException {
+		checkParameters(parameters, new String[]{"list","delimiter"}, LOG);
+		ArrayList<SortableCtxListElement> list = new ArrayList<>();
+
+		String[] sort_fields = null;
+		if( parameters.containsKey("sort-fields") ) {
+			sort_fields = parameters.get("sort-fields").split(parameters.get("delimiter"), 0);
+		}
+
+		String ctx_list_str = parameters.get("list");
+		int listSz = getArrayLength(ctx, ctx_list_str);
+
+
+
+		for( int i = 0; i < listSz; i++ ) {
+			list.add( new SortableCtxListElement(ctx, ctx_list_str + '[' + i + ']', sort_fields) );
+		}
+		Collections.sort(list);
+
+		ctxBulkErase(ctx, ctx_list_str);
+		int i = 0;
+		for( SortableCtxListElement list_element : list ) {
+			for( Map.Entry<String,String> entry : list_element.child_elements.entrySet() ) {
+				if( sort_fields == null ) {
+					ctx.setAttribute(ctx_list_str + '[' + i + ']', entry.getValue());
+				}
+				else {
+					ctx.setAttribute(ctx_list_str + '[' + i + "]." + entry.getKey(), entry.getValue());
+				}
+			}
+			i++;
+		}
+		// Reset list length (removed by ctxBulkErase above)
+		ctx.setAttribute(ctx_list_str+LENGTH, Integer.toString(listSz));
+	}
+
+    /**
+     * generates a UUID and writes it to context memory
+     * @param parameters - ctx-destination is a required parameter
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException thrown if a UUID cannot be generated or if ctx-destination is missing or null
+     */
+	public void generateUUID( Map<String, String> parameters, SvcLogicContext ctx )  throws SvcLogicException {
+		checkParameters(parameters, new String[]{"ctx-destination"}, LOG);
+		ctx.setAttribute(parameters.get("ctx-destination"), UUID.randomUUID().toString() );
+	}
+
+	/**
+	 * Provides substring functionality to Directed Graphs.
+	 * <p>
+	 * Calls either String.substring(String beginIndex) or
+	 * String.substring(String beginInded, String endIndex) if the end-index
+	 * is present or not.
+	 * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+	 * <table border="1">
+	 * 	<thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+	 * 	<tbody>
+	 * 		<tr><td>string</td><td>Mandatory</td><td>String to perform substring on</td></tr>
+	 * 		<tr><td>result</td><td>Mandatory</td><td>Key in context memory to populate the resulting string in</td></tr>
+	 * 		<tr><td>begin-index</td><td>Mandatory</td><td>Beginning index to pass to Java substring function</td></tr>
+	 * 		<tr><td>end-index</td><td>Optional</td><td>Ending index to pass to Java substring function. If not included, String.substring(begin) will be called.</td></tr>
+	 * 	</tbody>
+	 * </table>
+	 * @param ctx Reference to context memory
+	 * @throws SvcLogicException
+	 * @since 8.0.1
+	 * @see SliPluginUtils#substring(Map, SvcLogicContext)
+	 */
+	@Deprecated
+	public void substring( Map<String, String> parameters, SvcLogicContext ctx ) throws SvcLogicException {
+		try {
+			checkParameters( parameters, new String[]{"string","begin-index","result"}, LOG );
+			final String string = parameters.get("string");
+			final String result = parameters.get("result");
+			final String begin = parameters.get("begin-index");
+			final String end = parameters.get("end-index");
+
+			if( StringUtils.isEmpty(end) ) {
+				ctx.setAttribute( result, string.substring(Integer.parseInt(begin)) );
+			}
+			else {
+				ctx.setAttribute( result, string.substring(Integer.parseInt(begin), Integer.parseInt(end)) );
+			}
+		}
+		catch( Exception e ) {
+			throw new SvcLogicException( "An error occurred while the Directed Graph was performing a substring", e );
+		}
+	}
+
+
+
+	// ========== PUBLIC STATIC UTILITY FUNCTIONS ==========
+
+	/**
+	 * Throws an exception and writes an error to the log file if a required
+	 * parameters is not found in the parametersMap.
+	 * <p>
+	 * Use at the beginning of functions that can be called by Directed Graphs
+	 * and can take parameters to verify that all parameters have been provided
+	 * by the Directed Graph.
+	 * @param parametersMap parameters Map passed to this node
+	 * @param requiredParams Array of parameters required by the calling function
+	 * @param log Reference to Logger to log to
+	 * @throws SvcLogicException if a String in the requiredParams array is
+	 * not a key in parametersMap.
+	 * @since 1.0
+	 */
+        public static final void checkParameters(Map<String, String> parametersMap, String[] requiredParams, Logger log) throws SvcLogicException {
+        if( requiredParams == null || requiredParams.length < 1){
+            log.debug("required parameters was empty, exiting early.");
+            return;
+        }
+        if (parametersMap == null || parametersMap.keySet().isEmpty()){
+            String errorMessage = "This method requires the parameters [" +   StringUtils.join(requiredParams,",") + "], but no parameters were passed in.";
+            log.error(errorMessage);
+            throw new SvcLogicException(errorMessage);
+        }
+
+    	for (String param : requiredParams) {
+    	    if (!parametersMap.containsKey(param)) {
+    		String errorMessage = "Required parameter \"" + param + "\" was not found in parameter list.";
+    		log.error(errorMessage);
+    		log.error("Total list of required parameters is [" + StringUtils.join(requiredParams, ",") + "].");
+    		throw new SvcLogicException(errorMessage);
+    	    }
+    	}
+        }
+
+	/**
+	 * Removes all key-value pairs with keys that begin with pfx
+	 * @param ctx Reference to context memory
+	 * @param pfx Prefix of key-value pairs to remove
+	 * @since 1.0
+	 */
+	public static final void ctxBulkErase( SvcLogicContext ctx, String pfx ) {
+		ArrayList<String> Keys = new ArrayList<>(ctx.getAttributeKeySet());
+		for( String key : Keys ) {
+			if( key.startsWith( pfx ) ) {
+				ctx.setAttribute( pfx + key.substring(pfx.length()) , null);
+			}
+		}
+	}
+
+	/**
+	 * Copies all context memory key-value pairs that start with src_pfx to
+	 * the keys that start with dest_pfx + suffix, where suffix is the result
+	 * of {@code key.substring(src_pfx.length())}.
+	 * <p>
+	 * Does NOT guarantee removal of all keys at the destination before
+	 * copying, but will overwrite any destination keys that have a
+	 * corresponding source key. Use {@link #ctxBulkErase(SvcLogicContext, String) ctxBulkErase}
+	 * before copy to erase destination root before copying from source.
+	 * @param ctx Reference to context memory.
+	 * @param src_pfx Prefix of the keys to copy values from.
+	 * @param dest_pfx Prefix of the keys to copy values to.
+	 * @since 1.0
+	 */
+	public static final void ctxBulkCopy( SvcLogicContext ctx, String src_pfx, String dest_pfx ) {
+		// Remove trailing period from dest_pfx
+		if( dest_pfx.charAt(dest_pfx.length()-1) == '.' ) {
+			dest_pfx = dest_pfx.substring(0,dest_pfx.length()-1);
+		}
+
+		// For each context key that begins with src_pfx, set the value of the
+		// key dest_pfx + the suffix of the key to the key's value
+		ArrayList<String> Keys = new ArrayList<>(ctx.getAttributeKeySet());
+		for( String key : Keys ) {
+			if( key.startsWith(src_pfx) ) {
+				// Get suffix (no leading period)
+				String suffix = key.substring(src_pfx.length());
+				if( suffix.charAt(0) == '.') {
+					suffix = suffix.substring(1);
+				}
+
+				// Set destination's value to key's value
+				ctx.setAttribute(dest_pfx + '.' + suffix, ctx.getAttribute(key));
+			}
+		}
+	}
+
+	/**
+	 * Creates and returns a {@code Map<String, String>} that is a subset of
+	 * context memory where all keys begin with the prefix.
+	 * @param ctx Reference to context memory.
+	 * @param prefix Returned map's keys should all begin with this value.
+	 * @return A {@code Map<String, String>} containing all the key-value pairs
+	 * in ctx whose key begins with prefix.
+	 */
+	public static final Map<String, String> ctxGetBeginsWith( SvcLogicContext ctx, String prefix ) {
+		Map<String, String> prefixMap = new HashMap<>();
+
+		for( String key : ctx.getAttributeKeySet() ) {
+			if( key.startsWith(prefix) ) {
+				prefixMap.put( key, ctx.getAttribute(key) );
+			}
+		}
+
+		return prefixMap;
+	}
+
+	/**
+	 * Returns true if key's value in context memory is "" or if it doesn't
+	 * exist in context memory.
+	 * @param ctx Reference to context memory.
+	 * @param key Key to search for.
+	 * @return true if key's value in context memory is "" or if it doesn't
+	 * exist in context memory.
+	 * @since 1.0
+	 */
+	public static final boolean ctxKeyEmpty( SvcLogicContext ctx, String key ) {
+		String value = ctx.getAttribute(key);
+		return value == null || value.isEmpty();
+	}
+
+	/**
+	 * Adds all key-value pairs in the entries Map to context memory.
+	 * @param ctx Reference to context memory. Value's {@code toString()}
+	 * function is used to add it.
+	 * @param entries {@code Map<String, ?>} of key-value pairs to add to
+	 * context memory. Value's {@code toString()} function is used to add it.
+	 * @return Reference to context memory to be used for function chaining.
+	 */
+	public static final SvcLogicContext ctxPutAll( SvcLogicContext ctx, Map<String, ?> entries ) {
+		for( Map.Entry<String, ?> entry : entries.entrySet() ) {
+			ctxSetAttribute( ctx, entry.getKey(), entry.getValue() );
+			//ctx.setAttribute(entry.getKey(), entry.getValue().toString());
+		}
+
+		return ctx;
+	}
+
+	/**
+	 * Sets a key in context memory to the output of object's toString(). The
+	 * key is deleted from context memory if object is null.
+	 * @param ctx Reference to context memory.
+	 * @param key Key to set.
+	 * @param object Object whose toString() will be the value set
+	 */
+	public static final void ctxSetAttribute( SvcLogicContext ctx, String key, Object object ) {
+		if( object == null ) {
+			ctx.setAttribute(key, null);
+		}
+		else {
+			ctx.setAttribute(key, object.toString());
+		}
+	}
+
+	/**
+	 * Sets a key in context memory to the output of object's toString().
+	 * <p>
+	 * The key is deleted from context memory if object is null. The key and
+	 * value set in context memory are logged to the Logger at the provided
+	 * logLevel level.
+	 * @param <O> Any Java object
+	 * @param ctx Reference to context memory.
+	 * @param key Key to set.
+	 * @param obj Object whose toString() will be the value set
+	 * @param LOG Logger to log to
+	 * @param logLevel level to log at in Logger
+	 */
+	public static final <O extends Object> void ctxSetAttribute( SvcLogicContext ctx, String key, O obj, Logger LOG, LogLevel logLevel ) {
+		String value = Objects.toString( obj, null );
+		ctx.setAttribute( key, value );
+		if( logLevelIsEnabled(LOG, logLevel ) ) {
+			if( value == null ) {
+				logMessageAtLevel( LOG, logLevel, "Deleting " + key );
+			}
+			else {
+				logMessageAtLevel( LOG, logLevel, "Setting " + key + " = " + value );
+			}
+		}
+	}
+
+	/**
+	 * Utility function used to get an array's length from context memory.
+	 * Will return 0 if key doesn't exist in context memory or isn't numeric.
+	 * <p>
+	 * Use to obtain a context memory array length without having to worry
+	 * about throwing a NumberFormatException.
+	 * @param ctx Reference to context memory
+	 * @param key Key in context memory whose value is the array's length. If
+	 * the key doesn't end in "_length", then "_length is appended.
+	 * @param log Reference to Logger to log to
+	 * @return The array length or 0 if the key is not found in context memory.
+	 * @since 1.0
+	 */
+	public static final int getArrayLength( SvcLogicContext ctx, String key ) {
+		return getArrayLength(ctx, key, null, null, null);
+	}
+
+	/**
+	 * Utility function used to get an array's length from context memory.
+	 * Will return 0 if key doesn't exist in context memory or isn't numeric
+	 * and print the provided log message to the configured log file.
+	 * <p>
+	 * Use to obtain a context memory array length without having to worry
+	 * about throwing a NumberFormatException.
+	 * @param ctx Reference to context memory.
+	 * @param key Key in context memory whose value is the array's length. If
+	 * the key doesn't end in "_length", then "_length is appended.
+	 * @param log Reference to Logger to log to. Doesn't log if null.
+	 * @param logLevel Logging level to log the message at if the context
+	 * memory key isn't found. Doesn't log if null.
+	 * @param log_message Message to log if the context memory key isn't found.
+	 * Doesn't log if null.
+	 * @return The array length or 0 if the key is not found in context memory.
+	 * @since 1.0
+	 */
+	public static final int getArrayLength( SvcLogicContext ctx, String key, Logger log, LogLevel logLevel, String log_message ) {
+		String ctxKey = key.endsWith(LENGTH) ? key : key + LENGTH;
+		try {
+			return Integer.parseInt(ctx.getAttribute(ctxKey));
+		}
+		catch( NumberFormatException e ) {
+			if( log != null && logLevel != null && log_message != null ) {
+				switch( logLevel ) {
+					case TRACE:
+						log.trace(log_message);
+						break;
+					case DEBUG:
+						log.debug(log_message);
+						break;
+					case INFO:
+						log.info(log_message);
+						break;
+					case WARN:
+						log.warn(log_message);
+						break;
+					case ERROR:
+						log.error(log_message);
+						break;
+				}
+			}
+		}
+
+		return 0;
+	}
+
+	/**
+	 * Prints sorted context memory key-value pairs to the log file at the log
+	 * level. Returns immediately if the log level isn't enabled.
+	 * <p>
+	 * O(n log(n)) time where n = size of context memory
+	 * @param ctx Reference to context memory
+	 * @param log Reference to Logger to log to
+	 * @param logLevel Logging level to log the context memory key-value pairs
+	 * at.
+	 * @since 1.0
+	 */
+	public static final void logContextMemory( SvcLogicContext ctx, Logger log, LogLevel logLevel ) {
+		logLevelIsEnabled( log, logLevel );
+
+		// Print sorted context memory key-value pairs to the log
+		ArrayList<String> keys = new ArrayList<>(ctx.getAttributeKeySet());
+		Collections.sort(keys);
+		for( String key : keys ) {
+			logMessageAtLevel( log, logLevel, key + " = " + ctx.getAttribute(key) );
+		}
+	}
+
+
+
+	// ========== PRIVATE FUNCTIONS ==========
+
+	// TODO: javadoc
+	/**
+	 *
+	 * @param parameters
+	 * @param log
+	 * @param loglevel
+	 * @since 7.0.1
+	 */
+	public static final void logExecuteNodeParameters( Map<String,String> parameters, Logger log, LogLevel loglevel ) {
+		logLevelIsEnabled( log, loglevel );
+
+		for( Map.Entry<String,String> param : parameters.entrySet() ) {
+			logMessageAtLevel( log, loglevel, "PARAM: " + param.getKey() + " = " + param.getValue() );
+		}
+	}
+
+	// TODO: javadoc
+	/**
+	 * Returns true if the loglevel is enabled. Otherwise, returns false.
+	 * @param log Reference to logger
+	 * @param loglevel Log level to check if enabled
+	 * @return True if the loglevel is enabled. Otherwise, false
+	 * @since 7.0.1
+	 */
+	private static final boolean logLevelIsEnabled( Logger log, LogLevel loglevel ) {
+		// Return immediately if logging level isn't enabled
+		switch( loglevel ) {
+			case TRACE:
+				if( log.isTraceEnabled() ) { return true; }
+				return false;
+			case DEBUG:
+				if( log.isDebugEnabled() ) { return true; }
+				return false;
+			case INFO:
+				if( log.isInfoEnabled() ) { return true; }
+				return false;
+			case WARN:
+				if( log.isWarnEnabled() ) { return true; }
+				return false;
+			case ERROR:
+				if( log.isErrorEnabled() ) { return true; }
+				return false;
+			default:
+				throw new IllegalArgumentException("Unknown LogLevel: " + loglevel.toString());
+		}
+	}
+
+	// TODO: javadoc
+	/**
+	 *
+	 * @param log
+	 * @param loglevel
+	 * @param msg
+	 * @since 7.0.1
+	 */
+	private static final void logMessageAtLevel( Logger log, LogLevel loglevel, String msg ) {
+		switch( loglevel ) {
+			case TRACE:
+				log.trace(msg);
+				return;
+			case DEBUG:
+				log.debug(msg);
+				return;
+			case INFO:
+				log.info(msg);
+				return;
+			case WARN:
+				log.warn(msg);
+				return;
+			case ERROR:
+				log.error(msg);
+				return;
+		}
+	}
+
+
+
+	// ========== LOCAL CLASSES ==========
+
+	private class SortableCtxListElement implements Comparable<SortableCtxListElement> {
+		HashMap<String,String> child_elements = new HashMap<>();
+		String[] sort_fields;
+
+		public SortableCtxListElement( SvcLogicContext ctx, String root, String[] sort_fields ) {
+			this.sort_fields = sort_fields;
+
+			for( String key : ctx.getAttributeKeySet() ) {
+				if( key.startsWith(root) ) {
+					if( key.length() == root.length() ) {
+						child_elements.put("", ctx.getAttribute(key));
+						break;
+					}
+					else {
+						child_elements.put(key.substring(root.length()+1), ctx.getAttribute(key));
+					}
+				}
+			}
+		}
+
+		@Override
+		public int compareTo(SortableCtxListElement arg0) {
+			if( sort_fields == null ) {
+				return this.child_elements.get("").compareTo(arg0.child_elements.get(""));
+			}
+
+			for( String field : this.sort_fields ) {
+				int result = this.child_elements.get(field).compareTo(arg0.child_elements.get(field));
+				if( result != 0 ) {
+					return result;
+				}
+			}
+
+			return 0;
+		}
+
+                @Override
+		public boolean equals(Object object) {
+			if (this == object) {
+				return true;
+			}
+			if (!(object instanceof SortableCtxListElement)) {
+				return false;
+			}
+			if (!super.equals(object)) {
+				return false;
+			}
+
+			SortableCtxListElement that = (SortableCtxListElement) object;
+
+			if (child_elements != null ? !child_elements.equals(that.child_elements)
+					: that.child_elements != null) {
+				return false;
+			}
+			// Probably incorrect - comparing Object[] arrays with Arrays.equals
+			if (!Arrays.equals(sort_fields, that.sort_fields)) {
+				return false;
+			}
+
+			return true;
+		}
+
+                @Override
+		public int hashCode() {
+			int result = super.hashCode();
+			result = 31 * result + (child_elements != null ? child_elements.hashCode() : 0);
+			result = 31 * result + Arrays.hashCode(sort_fields);
+			return result;
+		}
+	}
+
+	/**
+     * Creates a file that contains the content of context memory.
+     * @param parameters - must contain the parameter filename
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException thrown if file cannot be created or if parameters are missing
+     */
+	public static void printContext(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+		if (parameters == null || parameters.isEmpty()) {
+			throw new SvcLogicException("no parameters passed");
+		}
+
+		checkParameters(parameters, new String[]{"filename"}, LOG);
+
+		String fileName = parameters.get("filename");
+
+
+		try (FileOutputStream fstr = new FileOutputStream(new File(fileName));
+			 PrintStream pstr = new PrintStream(fstr, true);)
+		{
+			pstr.println("#######################################");
+			for (String attr : ctx.getAttributeKeySet()) {
+				pstr.println(attr + " = " + ctx.getAttribute(attr));
+			}
+		} catch (Exception e) {
+			throw new SvcLogicException("Cannot write context to file " + fileName, e);
+		}
+
+
+	}
+
+    public static void logContextProperties(Map<String, String> parameters, SvcLogicContext ctx)
+            throws SvcLogicException {
+        if (LOG.isTraceEnabled()) {
+            String subpath = parameters.get("subpath");
+            if (subpath != null && !subpath.isEmpty()) {
+                ctx.printProperties(ctx.toProperties(), subpath);
+            } else {
+                ctx.printProperties(ctx.toProperties());
+            }
+        }
+    }
+
+    public static void logContextAttributes(Map<String, String> parameters, SvcLogicContext ctx)
+            throws SvcLogicException {
+        if (LOG.isTraceEnabled()) {
+            String subpath = parameters.get("subpath");
+            if (subpath != null && !subpath.isEmpty()) {
+                ctx.printAttributes(subpath);
+            } else {
+                ctx.printAttributes();
+            }
+        }
+    }
+
+	 /**
+     * Checks context memory for a set of required parameters
+     * Every parameter aside from prefix will be treated as mandatory
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>prefix</td><td>Optional</td><td>the prefix will be added to each parameter</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+	public static void requiredParameters(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+		if (parameters == null || parameters.keySet().isEmpty()) {
+            String errorMessage = "requiredParameters should not be called if the parameters hashmap is null or empty!";
+            LOG.error(errorMessage);
+            throw new SvcLogicException(errorMessage);
+		}
+		String prefixValue = null;
+		String prefix = "prefix";
+		if(parameters.containsKey(prefix)){
+		    prefixValue = parameters.get(prefix);
+		    parameters.remove(prefix);
+		}
+		checkParameters(prefixValue, ctx.getAttributeKeySet(), parameters.keySet(), LOG);
+	}
+
+    private static void checkParameters(String prefixValue, Set<String> ctx, Set<String> parameters, Logger log) throws SvcLogicException {
+        for (String param : parameters) {
+            if (prefixValue != null) {
+                param = prefixValue + param;
+            }
+            if (!ctx.contains(param)) {
+                String errorMessage = "This method requires the parameters [" + StringUtils.join(parameters, ",")
+                        + "], but " + param + " was not passed in.";
+                log.error(errorMessage);
+                throw new SvcLogicException(errorMessage);
+            }
+        }
+    }
+
+    /**
+     *  is in a different DG invocation just before/after we call NCS and set the state to InProgress
+     */
+    /**
+    * setTime write the current date time to a string located at outputPath
+    * @param parameters - requires outputPath to not be null
+    * @param ctx Reference to context memory
+    * @throws SvcLogicException if a required parameter is missing an exception is thrown
+    */
+    public static void setTime(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException
+    {
+        checkParameters(parameters, new String[] { "outputPath" }, LOG);
+
+        // Set the DateFormat
+        // "2015-03-16T12:18:35.138Z"
+        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
+
+        // Parse the date
+        String ctxVariable = parameters.get("outputPath");
+        try {
+            String dateTime = format.format(new Date());
+            ctx.setAttribute(ctxVariable, dateTime);
+        } catch (Exception ex) {
+            throw new SvcLogicException("problem with setTime", ex);
+        }
+    }
+
+    /**
+    * jsonStringToCtx takes a json string stored as a single property in context memory and breaks it into individual properties
+    * @param parameters - requires source, outputPath and isEscaped to not be null.
+    * @param ctx Reference to context memory
+    * @throws SvcLogicException if a required parameter is missing an exception is thrown
+    */
+    public static void jsonStringToCtx(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException
+    {
+        checkParameters(parameters, new String[] { "source","outputPath","isEscaped" }, LOG);
+        try {
+            String source = ctx.getAttribute(parameters.get("source"));
+            if("true".equals(parameters.get("isEscaped"))){
+                source = StringEscapeUtils.unescapeJson(source);
+            }
+            ctx.mergeJson(parameters.get("outputPath"), source);
+            // writeJsonToCtx(source, ctx,parameters.get("outputPath"));
+        } catch (Exception ex) {
+            throw new SvcLogicException("problem with jsonStringToCtx", ex);
+        }
+    }
+
+    protected static void writeJsonToCtx(String resp, SvcLogicContext ctx, String prefix){
+    	// Refactored code for this method into SvcLogicContext object.  Leaving this
+		// method in place for backward compatibility.
+        ctx.mergeJson(prefix, resp);
+    }
+
+    /**
+     * updateJsonObjectString takes a json object string, and adds or deletes the properties of it
+     * @param parameters - requires source, outputPath and keys to be added or deleted.
+     *                   The key of parameter starts with "add.", e.g. "add.A", and then "A" and its value will be added
+     *                   to the JSON object.
+     *                   The key of parameter starts with "delete.", e.g. "delete.B", and then "B" will be deleted from
+     *                   the JSON object.
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException if a required parameter is missing an exception is thrown
+     */
+    public static void updateJsonObjectString(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        checkParameters(parameters, new String[] {"source", "outputPath"}, LOG);
+        try {
+            String source = ctx.getAttribute(parameters.get("source"));
+            JsonParser jp = new JsonParser();
+            JsonElement element = jp.parse(source);
+            if (element.isJsonObject()) {
+                JsonObject jsonObject = element.getAsJsonObject();
+                updateJsonObject(jsonObject, parameters);
+
+                String target = jsonObject.toString();
+                ctx.setAttribute(parameters.get("outputPath"), target);
+            } else {
+                throw new SvcLogicException("just update JSON object string");
+            }
+        } catch (Exception ex) {
+            throw new SvcLogicException("problem with updateJsonObjectString", ex);
+        }
+    }
+
+    protected static void updateJsonObject(JsonObject jsonObject, Map<String, String> parameters) throws SvcLogicException {
+        List<String> deleted_params = parameters.keySet().stream().filter(param -> param.startsWith("delete.")).
+                collect(Collectors.toList());
+        for (String param: deleted_params) {
+            String[] action_key = param.split("\\.", 2);
+            if (action_key.length < 2) {
+                throw new SvcLogicException("error parameter format: " + param + ", must be \"delete.<key>\"");
+            }
+            jsonObject.remove(action_key[1]);
+        }
+
+        List<String> added_params = parameters.keySet().stream().filter(param -> param.startsWith("add.")).
+                collect(Collectors.toList());
+        for (String param: added_params) {
+            String[] action_key = param.split("\\.", 2);
+            if (action_key.length < 2) {
+                throw new SvcLogicException("error parameter format: " + param + ", must be \"add.<key>\"");
+            }
+            jsonObject.addProperty(action_key[1], parameters.get(param));
+        }
+    }
+
+    /**
+     * getAttributeValue takes a ctx memory path as a string, gets the value stored at this path and set this value in context memory at
+     * outputPath
+     * @param parameters - requires source and outputPath
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException if a required parameter is missing an exception is thrown
+     */
+     public static void getAttributeValue(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+         checkParameters(parameters, new String[] { "source", "outputPath" }, LOG);
+         String source = ctx.getAttribute(parameters.get("source"));
+         ctx.setAttribute(parameters.get("outputPath"), source);
+     }
+
+	/**
+	 * ctxListContains provides a way to see if a context memory list contains a key value
+	 * @param parameters - requires list, keyName, keyValue, outputPath to all not be null.
+	 * @param ctx        Reference to context memory
+	 * @throws SvcLogicException if a required parameter is missing an exception is thrown
+	 */
+	public static String ctxListContains(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+		checkParameters(parameters, new String[]{"list", "keyName", "keyValue"}, LOG);
+
+		try {
+			String ctxList = parameters.get("list");
+			ctxList = (ctxList.endsWith(LENGTH)) ? ctxList : ctxList + LENGTH;
+			int listLength = getArrayLength(ctx, ctxList);
+
+			if (listLength == 0) {
+				LOG.debug("List is not in context memory");
+				return "false";
+			} else {
+				Set<String> keys = new HashSet<String>();
+
+				String listPrefix = ctxList.substring(0, ctxList.lastIndexOf("_")) + "[";
+				String listSuffix = "]." + parameters.get("keyName");
+
+				for (int i = 0; i < listLength; i++) {
+					String keyLocation = listPrefix + i + listSuffix;
+					keys.add(ctx.getAttribute(keyLocation));
+				}
+
+				if (keys.contains(parameters.get("keyValue"))) {
+					LOG.debug("List " + parameters.get("list") + " contains " + parameters.get("keyValue"));
+					return "true";
+				} else {
+					LOG.debug("List " + parameters.get("list") + " do not contains " + parameters.get("keyValue"));
+					return "false";
+				}
+			}
+		} catch (Exception ex) {
+			throw new SvcLogicException("ctxListContains failed", ex);
+		}
+	}
+
+	/**
+	 * set properties in context memory for a container </br>
+	 * parameters with a null or empty key or value are ignored </br>
+	 * required parameter root - root + "." + parameters.key
+	 * is the key to set the value too value in context memory </br>
+	 * optional parameter valueRoot - if set: valueRoot + "." + parameters.value
+	 * is the key to get the value from context memory
+	 *
+	 * @param parameters - root (required), valueRoot (optional), properties names and values to be set
+	 * @param ctx        Reference to context memory
+	 * @return success or failure of operation
+	 */
+	public static String setPropertiesForRoot(Map<String, String> parameters, SvcLogicContext ctx) {
+		LOG.debug("Execute Node \"setPropertiesForRoot\"");
+		try {
+			checkParameters(parameters, new String[]{"root"}, LOG);
+		} catch (Exception ex) {
+			return SvcLogicConstants.FAILURE;
+		}
+
+		String root = parameters.get("root");
+
+		if (StringUtils.isEmpty(root)) {
+			return SvcLogicConstants.FAILURE;
+		}
+
+		// set context memory to the the properties passed with root as prefix
+		setParameterValuesToRoot(parameters, ctx, root);
+
+		return SvcLogicConstants.SUCCESS;
+	}
+
+	private static boolean setParameterValuesToRoot(Map<String, String> parameters, SvcLogicContext ctx, String root) {
+		boolean changeFlag = false;
+		String valueRoot = parameters.get("valueRoot");
+
+		for (Map.Entry<String, String> entry : parameters.entrySet()) {
+			// ignore if it's the root parameter
+			if (!entry.getKey().equals("root")) {
+				String keyToBeSet = root + "." + entry.getKey();
+				String valueToBeSet = "";
+
+				if (StringUtils.isEmpty(valueRoot)) {
+					valueToBeSet = entry.getValue();
+				} else {
+					valueToBeSet = ctx.getAttribute(valueRoot + "." + entry.getValue());
+				}
+
+				LOG.debug("Setting context memory: " + keyToBeSet + " = " + valueToBeSet);
+
+				if (!StringUtils.isEmpty(entry.getKey()) && !StringUtils.isEmpty(valueToBeSet)) {
+					ctxSetAttribute(ctx, keyToBeSet, valueToBeSet);
+					changeFlag = true;
+				}
+			}
+		}
+
+		return changeFlag;
+	}
+
+	/**
+	 * takes container list and set the properties with the value provided </br>
+	 * parameters with a null or empty key or value are ignored </br>
+	 * required parameters </br>
+	 * prefixKey + "." + parameters.key is the key to set the value too value in context memory </br>
+	 * prefixKey + "[index]." + keyName is the key of the entry in the list in context memory </br>
+	 * keyValue is the value of the key of the list entry in context memory (must be actual value)</br>
+	 * optional parameter valuePrefixKey - if set: valuePrefixKey + "." + parameters.value
+	 * is the key to get the value from context memory
+	 *
+	 * @param parameters </br>
+	 * 					 - prefixKey e.g "service-data.universal-cpe-ft.l2-switch-interfaces" </br>
+	 *                   - keyName e.g "name" </br>
+	 *                   - keyValue e.g "WAN1" (must be actual value and not use the prefixKey as root) </br>
+	 *                   - valuePrefixKey (optional) e.g "input.universal-cpe-ft.l2-switch-interfaces[1] </br>
+	 *                   - properties to be set, values for the properties </br>
+	 * @param ctx        reference to context memory
+	 * @return success or failure of operation
+	 */
+	public static String setPropertiesForList(Map<String, String> parameters, SvcLogicContext ctx) {
+		LOG.debug("Execute Node \"setPropertiesForList\"");
+		try {
+			checkParameters(parameters, new String[]{"prefixKey", "keyName", "keyValue"}, LOG);
+		} catch (Exception e) {
+			LOG.error("a required parameter is missing");
+			return SvcLogicConstants.FAILURE;
+		}
+
+		String prefixKey = parameters.get("prefixKey");
+		String keyName = parameters.get("keyName");
+		String keyValue = parameters.get("keyValue");
+
+		if (StringUtils.isEmpty(keyName) || StringUtils.isEmpty(keyValue) || StringUtils.isEmpty(prefixKey)) {
+			LOG.error("a required parameters value is empty or null");
+			return SvcLogicConstants.FAILURE;
+		}
+
+		int listLength = getArrayLength(ctx, prefixKey);
+
+		Map<String, String> containParams = new HashMap<>();
+		containParams.put("list", prefixKey);
+		containParams.put("keyName", keyName);
+		containParams.put("keyValue", keyValue);
+
+		String valuePrefixKey = parameters.get("valuePrefixKey");
+
+		try {
+			// create new list in context memory
+			if (listLength == 0) {
+				// since there's no length found make sure there's no current data at prefixKey in context memory
+				Map<String, String> map = ctxGetBeginsWith(ctx, prefixKey);
+
+				if (map.size() == 0) {
+					setNewEntryInList(parameters, ctx, keyName, keyValue, prefixKey, valuePrefixKey, listLength);
+				} else {
+					LOG.error("there was no length for the list parameter set in context memory "
+							+ "but " + map.size() + " entries were found in context memory "
+							+ "where the key begins with: " + prefixKey);
+
+					return SvcLogicConstants.FAILURE;
+				}
+			} else if (ctxListContains(containParams, ctx) == "false") {
+				setNewEntryInList(parameters, ctx, keyName, keyValue, prefixKey, valuePrefixKey, listLength);
+			} else if (ctxListContains(containParams, ctx) == "true") {
+				// else update the context memory with the properties passed in at the right index level
+				String listPrefix = prefixKey + "[";
+				String listSuffix = "].";
+
+				for (int i = 0; i < listLength; i++) {
+					String listRootWithIndex = listPrefix + i + listSuffix;
+					String listKeyName = listRootWithIndex + keyName;
+					String valueAtListIndexKey = ctx.getAttribute(listKeyName);
+
+					if (valueAtListIndexKey.equals(keyValue)) {
+						setParametersToCtxList(parameters, ctx, listRootWithIndex, valuePrefixKey);
+					}
+				}
+			}
+		} catch (SvcLogicException e) {
+			LOG.error("Call to ctxListContains failed: " + e.getMessage());
+
+			return SvcLogicConstants.FAILURE;
+		}
+
+		return SvcLogicConstants.SUCCESS;
+	}
+
+	private static void setNewEntryInList(Map<String, String> parameters, SvcLogicContext ctx, String keyName,
+										  String keyValue, String prefixKey, String valuePrefixKey, int listLength) {
+		String prefixKeyWithIndex = prefixKey + "[" + listLength + "].";
+		String listKeyName = prefixKeyWithIndex + keyName;
+
+		// set list key
+		LOG.debug("Setting context memory, new list entry with key:  " + listKeyName + " = " + keyValue);
+		ctxSetAttribute(ctx, listKeyName, keyValue);
+
+		// set the other parameters
+		setParametersToCtxList(parameters, ctx, prefixKeyWithIndex, valuePrefixKey);
+
+		// set length of list
+		String ListLengthKeyName = prefixKey + LENGTH;
+
+		ctxSetAttribute(ctx, prefixKey + LENGTH, listLength + 1);
+		LOG.debug("Updated _length: " + prefixKey + "_length is now " + ctx.getAttribute(ListLengthKeyName));
+	}
+
+	/**
+	 * helper function to set the parameter properties for list at the provided prefix key
+	 *
+	 * @param parameters
+	 * @param ctx
+	 * @param prefixKey
+	 * @return true if any new context memory was added and or modified
+	 */
+	private static boolean setParametersToCtxList(Map<String, String> parameters, SvcLogicContext ctx, String prefixKeyWithIndex,
+												  String valuePrefixKey) {
+		boolean changeFlag = false;
+
+		for (Map.Entry<String, String> entry : parameters.entrySet()) {
+			if (! (entry.getKey().equals("prefixKey") ||
+					entry.getKey().equals("keyName") ||
+					entry.getKey().equals("keyValue")) ||
+					entry.getKey().equals("valuePrefixKey")) {
+
+				String keyToBeSet = prefixKeyWithIndex + entry.getKey();
+				String valueToBeSet = "";
+
+				if (StringUtils.isEmpty(valuePrefixKey)) {
+					valueToBeSet = entry.getValue();
+				} else {
+					valueToBeSet = ctx.getAttribute(valuePrefixKey + "." + entry.getValue());
+				}
+
+				LOG.debug("Setting context memory: " + keyToBeSet + " = " + valueToBeSet);
+
+				// only set context memory if properties key and value are not empty or null
+				if (!StringUtils.isEmpty(entry.getKey()) && !StringUtils.isEmpty(valueToBeSet)) {
+					ctxSetAttribute(ctx, keyToBeSet, valueToBeSet);
+					changeFlag = true;
+				}
+			}
+		}
+
+		return changeFlag;
+	}
+
+    public static String containsKey(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        String key = parameters.get("key");
+        Boolean keyFound = ctx.getAttributeKeySet().contains(key);
+        if (keyFound) {
+            return "true";
+        }
+        return "false";
+    }
+
+}
diff --git a/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SliStringUtils.java b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SliStringUtils.java
new file mode 100644
index 000000000..9e3367d45
--- /dev/null
+++ b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SliStringUtils.java
@@ -0,0 +1,559 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : CCSDK
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights
+ * 						reserved.
+ * ================================================================================
+ * Modifications Copyright (C) 2018 IBM.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.slipluginutils;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import java.net.URLEncoder;
+import java.util.Map;
+import java.util.Base64;
+import org.apache.commons.text.StringEscapeUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+import org.onap.ccsdk.sli.core.sli.SvcLogicException;
+import org.onap.ccsdk.sli.core.sli.SvcLogicJavaPlugin;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * A SvcLogicJavaPlugin that exposes java.lang.String functions to DirectedGraph
+ */
+public class SliStringUtils implements SvcLogicJavaPlugin {
+	private static final Logger LOG = LoggerFactory.getLogger(SliStringUtils.class);
+	public static final String INPUT_PARAM_KEY = "key";
+	public static final String INPUT_PARAM_SOURCE = "source";
+	public static final String INPUT_PARAM_TARGET = "target";
+    public static final String TRUE_CONSTANT = "true";
+    public static final String FALSE_CONSTANT = "false";
+
+	public SliStringUtils() {}
+
+	/**
+	 * Provides split functionality to Directed Graphs.
+	 * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+	 * <table border="1">
+	 * 	<thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+	 * 	<tbody>
+	 * 		<tr><td>original_string</td><td>Mandatory</td><td>String to perform split on</td></tr>
+	 * 		<tr><td>regex</td><td>Mandatory</td><td>the delimiting regular expression</td></tr>
+	 * 		<tr><td>limit</td><td>Optional</td><td>result threshold. See String.split method for further description. Defaults to 0</td></tr>
+	 * 		<tr><td>ctx_memory_result_key</td><td>Mandatory</td><td>Key in context memory to populate the resulting array of strings under</td></tr>
+	 * 	</tbody>
+	 * </table>
+	 * @param ctx Reference to context memory
+	 * @throws SvcLogicException
+	 * @since 11.0.2
+	 * @see String#split(String, int)
+	 */
+	public void split( Map<String, String> parameters, SvcLogicContext ctx ) throws SvcLogicException {
+		final String original_string = parameters.get("original_string");
+		LOG.trace("original_string = " + original_string);
+		final String regex = parameters.get("regex");
+		LOG.trace("regex = " + regex);
+		final String limit_str = parameters.get("limit");
+		LOG.trace("limit_str = " + limit_str);
+		final String ctx_memory_result_key = parameters.get("ctx_memory_result_key");
+		LOG.trace("ctx_memory_result_key = " + ctx_memory_result_key);
+
+		try {
+			// Validation that parameters are not null
+			SliPluginUtils.checkParameters( parameters, new String[]{"original_string","regex","ctx_memory_result_key"}, LOG );
+
+			// Read limit from context memory. Default to 0 if null/empty
+			int limit = 0;
+			if( StringUtils.isNotEmpty(limit_str) ) {
+				try {
+					limit = Integer.parseInt(limit_str);
+				}
+				catch( NumberFormatException e ) {
+					throw new IllegalArgumentException( "The limit parameter of the SliStringUtils.split() function must be a number, empty string, or null", e );
+				}
+			}
+
+			// Call String.split(regex,limit) on string passed in
+			String[] split_string = original_string.split(regex, limit);
+
+			// Populate context memory with results
+			for( int i = 0; i < split_string.length; i++ ) {
+				SliPluginUtils.ctxSetAttribute(ctx, ctx_memory_result_key + '[' + i + ']', split_string[i], LOG, SliPluginUtils.LogLevel.DEBUG);
+			}
+			SliPluginUtils.ctxSetAttribute(ctx, ctx_memory_result_key + "_length", new Integer(split_string.length), LOG, SliPluginUtils.LogLevel.DEBUG);
+		}
+		catch( Exception e ) {
+			// Have error message print parameters
+			throw new SvcLogicException( "An error occurred during SliStringUtils.split() where original_string = " + quotedOrNULL(regex) +
+					" regex = " + quotedOrNULL(regex) +
+					" limit = " + quotedOrNULL(regex) +
+					" ctx_memory_result_key = " + quotedOrNULL(regex), e );
+		}
+	}
+
+	public static String quotedOrNULL( String str ) {
+		return (str == null) ? "NULL" : '"' + str + '"';
+	}
+
+    /**
+     * exposes equalsIgnoreCase to directed graph
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * emits a true or false outcome
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>target</td><td>Mandatory</td><td>target string</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static String equalsIgnoreCase(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[] {INPUT_PARAM_SOURCE, INPUT_PARAM_TARGET}, LOG);
+        if (parameters.get(INPUT_PARAM_SOURCE).equalsIgnoreCase(parameters.get(INPUT_PARAM_TARGET))) {
+            return TRUE_CONSTANT;
+        }
+        return FALSE_CONSTANT;
+    }
+
+    /**
+     * exposes toUpperCase to directed graph
+     * writes an upperCase version of source to outputPath
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>outputPath</td><td>Mandatory</td><td>the location in context memory the result is written to</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static void toUpper(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[]{INPUT_PARAM_SOURCE,"outputPath"}, LOG);
+        ctx.setAttribute(parameters.get("outputPath"), parameters.get(INPUT_PARAM_SOURCE).toUpperCase());
+    }
+
+    /**
+     * exposes toLowerCase to directed graph
+     * writes a lowerCase version of source to outputPath
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>outputPath</td><td>Mandatory</td><td>the location in context memory the result is written to</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static void toLower(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[]{INPUT_PARAM_SOURCE,"outputPath"}, LOG);
+        ctx.setAttribute(parameters.get("outputPath"), parameters.get(INPUT_PARAM_SOURCE).toLowerCase());
+    }
+
+    /**
+     * exposes contains to directed graph to test if one string contains another
+     * tests if the source contains the target
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * emits a true or false outcome
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>target</td><td>Mandatory</td><td>target string</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static String contains(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[] {INPUT_PARAM_SOURCE, INPUT_PARAM_TARGET}, LOG);
+        if (parameters.get(INPUT_PARAM_SOURCE).contains(parameters.get(INPUT_PARAM_TARGET))) {
+            return TRUE_CONSTANT;
+        }
+        return FALSE_CONSTANT;
+    }
+
+    /**
+     * exposes endsWith to directed graph to test if one string endsWith another string
+     * tests if the source ends with the target
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * emits a true or false outcome
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>target</td><td>Mandatory</td><td>target string</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static String endsWith(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[] {INPUT_PARAM_SOURCE, INPUT_PARAM_TARGET}, LOG);
+        if (parameters.get(INPUT_PARAM_SOURCE).endsWith(parameters.get(INPUT_PARAM_TARGET))) {
+            return TRUE_CONSTANT;
+        }
+        return FALSE_CONSTANT;
+    }
+
+    /**
+     * exposes startsWith to directed graph to test if one string endsWith another string
+     * tests if the source ends with the target
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * emits a true or false outcome
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>target</td><td>Mandatory</td><td>target string</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static String startsWith(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[] {INPUT_PARAM_SOURCE, INPUT_PARAM_TARGET}, LOG);
+        if (parameters.get(INPUT_PARAM_SOURCE).startsWith(parameters.get(INPUT_PARAM_TARGET))) {
+            return TRUE_CONSTANT;
+        }
+        return FALSE_CONSTANT;
+    }
+
+    /**
+     * exposes trim to directed graph
+     * writes a trimmed version of the string to the outputPath
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>outputPath</td><td>Mandatory</td><td>the location in context memory the result is written to</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static void trim(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[]{INPUT_PARAM_SOURCE,"outputPath"}, LOG);
+        ctx.setAttribute(parameters.get("outputPath"), parameters.get(INPUT_PARAM_SOURCE).trim());
+    }
+
+    /**
+     * exposes String.length() to directed graph
+     * writes the length of source to outputPath
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>outputPath</td><td>Mandatory</td><td>the location in context memory the result is written to</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static void getLength(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[]{INPUT_PARAM_SOURCE,"outputPath"}, LOG);
+        ctx.setAttribute(parameters.get("outputPath"), String.valueOf(parameters.get(INPUT_PARAM_SOURCE).length()));
+    }
+
+    /**
+     * exposes replace to directed graph
+     * writes the length of source to outputPath
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>target</td><td>Mandatory</td><td>The sequence of char values to be replaced</td></tr>
+     *      <tr><td>replacement</td><td>Mandatory</td><td>The replacement sequence of char values</td></tr>
+     *      <tr><td>outputPath</td><td>Mandatory</td><td>the location in context memory the result is written to</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static void replace(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters,
+                new String[] {INPUT_PARAM_SOURCE, "outputPath", INPUT_PARAM_TARGET, "replacement"}, LOG);
+        ctx.setAttribute(parameters.get("outputPath"), (parameters.get(INPUT_PARAM_SOURCE)
+                .replace(parameters.get(INPUT_PARAM_TARGET), parameters.get("replacement"))));
+    }
+
+/**
+     * exposes base64decoding algo
+     * writes the length of source to outputPath
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>encodedValue</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>decodedValue</td><td>Mandatory</td><td>Destination path</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static void base64DecodingAlgo(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException{
+        try {
+            SliPluginUtils.checkParameters(parameters, new String[]{"encodedValue","decodedValue"}, LOG);
+
+            Base64.Decoder decoder = Base64.getDecoder();
+            byte[] decodedByteArray = decoder.decode(parameters.get("encodedValue"));
+            //Verify the decoded string
+            String decodeVal = new String(decodedByteArray);
+            ctx.setAttribute(parameters.get("decodedValue"), decodeVal);
+        }catch (Exception exc){
+            LOG.error("Exception occure "+exc.getMessage());
+            throw new SvcLogicException(exc.getMessage());
+        }
+    }
+
+
+    /**
+     * exposes replaceAll to directed graph
+     * writes the length of source to outputPath
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>target</td><td>Mandatory</td><td>This should be a valid regular expression</td></tr>
+     *      <tr><td>replacement</td><td>Mandatory</td><td>The replacement sequence of char values</td></tr>
+     *      <tr><td>outputPath</td><td>Mandatory</td><td>the location in context memory the result is written to</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static void replaceAll(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters,
+                new String[] {INPUT_PARAM_SOURCE, "outputPath", INPUT_PARAM_TARGET, "replacement"}, LOG);
+        ctx.setAttribute(parameters.get("outputPath"), parameters.get(INPUT_PARAM_SOURCE)
+                .replaceAll(parameters.get(INPUT_PARAM_TARGET), parameters.get("replacement")));
+    }
+
+    /**
+     * Provides substring functionality to Directed Graphs.
+     * <p>
+     * Calls either String.substring(String beginIndex) or
+     * String.substring(String beginInded, String endIndex) if the end-index
+     * is present or not.
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>string</td><td>Mandatory</td><td>String to perform substring on</td></tr>
+     *      <tr><td>result</td><td>Mandatory</td><td>Key in context memory to populate the resulting string in</td></tr>
+     *      <tr><td>begin-index</td><td>Mandatory</td><td>Beginning index to pass to Java substring function</td></tr>
+     *      <tr><td>end-index</td><td>Optional</td><td>Ending index to pass to Java substring function. If not included, String.substring(begin) will be called.</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public void substring( Map<String, String> parameters, SvcLogicContext ctx ) throws SvcLogicException {
+        try {
+            SliPluginUtils.checkParameters( parameters, new String[]{"string","begin-index","result"}, LOG );
+            final String string = parameters.get("string");
+            final String result = parameters.get("result");
+            final String begin = parameters.get("begin-index");
+            final String end = parameters.get("end-index");
+            if( StringUtils.isEmpty(end) ) {
+                ctx.setAttribute( result, string.substring(Integer.parseInt(begin)) );
+            }
+            else {
+                ctx.setAttribute( result, string.substring(Integer.parseInt(begin), Integer.parseInt(end)) );
+            }
+        }
+        catch( Exception e ) {
+            throw new SvcLogicException( "An error occurred while the Directed Graph was performing a substring", e );
+        }
+    }
+
+    /**
+     * Provides concat functionality to Directed Graphs.
+     * <p>
+     * Will concat target to source and write the result to outputPath
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>target</td><td>Mandatory</td><td>The sequence of char values to be replaced</td></tr>
+     *      <tr><td>outputPath</td><td>Mandatory</td><td>the location in context memory the result is written to</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     * @since 11.0.2
+     */
+    public static void concat( Map<String, String> parameters, SvcLogicContext ctx ) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[] {INPUT_PARAM_SOURCE, INPUT_PARAM_TARGET, "outputPath"},
+                LOG);
+        String result = parameters.get(INPUT_PARAM_SOURCE).concat(parameters.get(INPUT_PARAM_TARGET));
+            ctx.setAttribute(parameters.get("outputPath"), result);
+    }
+
+    /**
+     * Provides url encoding functionality to Directed Graphs.
+     * <p>
+     * Will url encode the source and write the result to outputPath
+     * @param parameters HashMap<String,String> of parameters passed by the DG to this function
+     * <table border="1">
+     *  <thead><th>parameter</th><th>Mandatory/Optional</th><th>description</th></thead>
+     *  <tbody>
+     *      <tr><td>source</td><td>Mandatory</td><td>source string</td></tr>
+     *      <tr><td>encoding</td><td>Optional</td><td>the name of a supported character encoding, defaulted to UTF-8 if not supplied</td></tr>
+     *      <tr><td>outputPath</td><td>Mandatory</td><td>the location in context memory the result is written to</td></tr>
+     *  </tbody>
+     * </table>
+     * @param ctx Reference to context memory
+     * @throws SvcLogicException
+     */
+    public static void urlEncode(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[] { INPUT_PARAM_SOURCE, "outputPath" }, LOG);
+        String encoding = parameters.get("encoding");
+        if (encoding == null) {
+            encoding = "UTF-8";
+        }
+        try {
+            String result = URLEncoder.encode(parameters.get(INPUT_PARAM_SOURCE), encoding);
+            ctx.setAttribute(parameters.get("outputPath"), result);
+        } catch (UnsupportedEncodingException e) {
+            throw new SvcLogicException("Url encode failed.", e);
+        }
+    }
+
+    public static void urlDecode(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        SliPluginUtils.checkParameters(parameters, new String[] {INPUT_PARAM_SOURCE, "outputPath"}, LOG);
+        String encoding = parameters.get("encoding");
+        if (encoding == null) {
+            encoding = "UTF-8";
+        }
+        try {
+            String result = URLDecoder.decode(parameters.get(INPUT_PARAM_SOURCE), encoding);
+            ctx.setAttribute(parameters.get("outputPath"), result);
+        } catch (UnsupportedEncodingException e) {
+            throw new SvcLogicException("Url decode failed.", e);
+        }
+    }
+
+	/**
+	 * xmlEscapeText() will be used to format input xml with text.
+	 *
+	 * @param inParams
+	 *            accepts the instance of {@link Map} holds the input xml in string
+	 *            format.
+	 * @param ctx
+	 *            accepts the instance of {@link SvcLogicContext} holds the service
+	 *            logic context.
+	 *
+	 */
+	public static void xmlEscapeText(Map<String, String> inParams, SvcLogicContext ctx) {
+		String source = inParams.get(INPUT_PARAM_SOURCE);
+		String target = inParams.get(INPUT_PARAM_TARGET);
+		source = StringEscapeUtils.escapeXml10(source);
+		ctx.setAttribute(target, source);
+	}
+
+	/**
+	* unescapeJsonString takes an escaped json string stored as a single property in context memory and unescapes it storing it as a single property
+	* @param parameters - requires source and outputPath to not be null.
+	* @param ctx Reference to context memory
+	* @throws SvcLogicException if a required parameter is missing an exception is thrown
+	*/
+    public static void unescapeJsonString(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+	SliPluginUtils.checkParameters(parameters, new String[] { INPUT_PARAM_SOURCE, INPUT_PARAM_TARGET }, LOG);
+	try {
+	    String source = parameters.get(INPUT_PARAM_SOURCE);
+	    String target = parameters.get(INPUT_PARAM_TARGET);
+	    String unescapedJson = StringEscapeUtils.unescapeJson(source);
+	    ctx.setAttribute(target, unescapedJson);
+	} catch (Exception ex) {
+	    ex.printStackTrace();
+	    throw new SvcLogicException("problem with unescapeJsonString", ex);
+	}
+    }
+
+	/**
+	* escapeJsonString takes json stored as a single string in context memory and escapes it storing it as a single property
+	* @param parameters - requires source and outputPath to not be null.
+	* @param ctx Reference to context memory
+	* @throws SvcLogicException if a required parameter is missing an exception is thrown
+	*/
+    public static void escapeJsonString(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+	SliPluginUtils.checkParameters(parameters, new String[] { INPUT_PARAM_SOURCE, INPUT_PARAM_TARGET }, LOG);
+	try {
+	    String source = parameters.get(INPUT_PARAM_SOURCE);
+	    String target = parameters.get(INPUT_PARAM_TARGET);
+	    String unescapedJson = StringEscapeUtils.escapeJson(source);
+	    ctx.setAttribute(target, unescapedJson);
+	} catch (Exception ex) {
+	    ex.printStackTrace();
+	    throw new SvcLogicException("problem with escapeJsonString", ex);
+	}
+    }
+
+    public static String isBlank(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        String ctxLocation = parameters.get(INPUT_PARAM_KEY);
+        String str = ctx.getAttribute(ctxLocation);
+        if (str == null || str.isEmpty() || " ".equals(str)) {
+            return TRUE_CONSTANT;
+        }
+        return FALSE_CONSTANT;
+    }
+
+    public static String isEmpty(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        String ctxLocation = parameters.get(INPUT_PARAM_KEY);
+        String str = ctx.getAttribute(ctxLocation);
+        if (str == null || str.isEmpty()) {
+            return TRUE_CONSTANT;
+        }
+        return FALSE_CONSTANT;
+    }
+
+    public static String isNull(Map<String, String> parameters, SvcLogicContext ctx) throws SvcLogicException {
+        String ctxLocation = parameters.get(INPUT_PARAM_KEY);
+        String str = ctx.getAttribute(ctxLocation);
+        if (str == null) {
+            return TRUE_CONSTANT;
+        }
+        return FALSE_CONSTANT;
+    }
+}
diff --git a/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SvcLogicContextList.java b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SvcLogicContextList.java
new file mode 100644
index 000000000..32e1aebdc
--- /dev/null
+++ b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SvcLogicContextList.java
@@ -0,0 +1,210 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : CCSDK
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights
+ * 						reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.slipluginutils;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.ListIterator;
+import java.util.Map;
+
+import org.apache.commons.lang3.StringUtils;
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+
+/**
+ * A utility class used to manage list manipulation in the context memory.
+ * @see org.onap.ccsdk.sli.core.sli.SvcLogicContext
+ */
+public class SvcLogicContextList {
+    /**
+     * Internal flag indicating if list should be deleted from context memory
+     * when it is copied into the SvcLogicContextList object.
+     */
+    private enum OperType {
+        COPY, EXTRACT
+    }
+
+    // TODO: javadoc
+    protected final String prefix;
+    // TODO: javadoc
+    protected final ArrayList<HashMap<String,String>> list;
+
+
+    // TODO: javadoc
+    public SvcLogicContextList( SvcLogicContext ctx, String list_prefix ) {
+        this(ctx, list_prefix, OperType.COPY);
+    }
+
+    // TODO: javadoc
+    private SvcLogicContextList( SvcLogicContext ctx, String list_prefix, OperType operation ) {
+        this.prefix = list_prefix;
+
+        // Initialize list
+        int capacity = getCtxListLength(ctx, prefix);
+        this.list = new ArrayList<>(capacity);
+        for( int i = 0; i < capacity; i++ ) {
+            this.list.add(i, new HashMap<String,String>());
+        }
+
+        // Populate "elements" in list
+        String prefix_bracket = this.prefix + '[';
+        for (String key : new HashSet<String>(ctx.getAttributeKeySet())) {
+            if( key.startsWith(prefix_bracket) ) {
+                // Extract the index of the list
+                int index = getCtxListIndex(key, this.prefix, capacity);
+
+                // Store the
+                String suffix = key.substring((prefix_bracket + index + ']').length());
+                suffix = suffix.isEmpty() ? suffix : suffix.substring(1);
+                this.list.get(index).put( suffix, ctx.getAttribute(key));
+
+                // If flag to extract set, remove data from context memory as
+                // it is read into this list
+                if( operation == OperType.EXTRACT ) {
+                    ctx.setAttribute(key, null);
+                }
+            }
+        }
+
+        // If flag to extract set, remove list _length value from cxt mem
+        if( operation == OperType.EXTRACT ) {
+            ctx.setAttribute(this.prefix + "_length", null);
+        }
+    }
+
+    // TODO: javadoc
+    public static SvcLogicContextList extract( SvcLogicContext ctx, String list_prefix ) {
+        return new SvcLogicContextList(ctx, list_prefix, OperType.EXTRACT);
+    }
+
+
+    // ========== PUBLIC FUNCTIONS ==========
+
+    // TODO: javadoc
+    public HashMap<String,String> get( int index ) {
+        return this.list.get(index);
+    }
+
+    // TODO: javadoc
+    public HashMap<String,String> remove( int index ) {
+        return this.list.remove(index);
+    }
+
+    // TODO: javadoc
+    public void remove( String value ) {
+        remove( "", value );
+    }
+
+    // TODO: javadoc
+    public void remove( String key, String value ) {
+        if( value == null ) {
+            throw new IllegalArgumentException("value cannot be null");
+        }
+
+        ListIterator<HashMap<String,String>> itr = this.list.listIterator();
+        while( itr.hasNext() ) {
+            if( value.equals(itr.next().get(key)) ) {
+                itr.remove();
+            }
+        }
+    }
+
+    // TODO javadoc
+    public void remove( Map<String,String> primary_key ) {
+        ListIterator<HashMap<String,String>> itr = this.list.listIterator();
+        while( itr.hasNext() ) {
+            boolean found = true;
+            HashMap<String,String> list_element = itr.next();
+            for( Map.Entry<String,String> key : primary_key.entrySet() ) {
+                if( !key.getValue().equals(list_element.get(key.getKey())) ) {
+                    found = false;
+                    break;
+                }
+            }
+
+            if( found ) {
+                itr.remove();
+            }
+        }
+    }
+
+    // TODO: javadoc
+    public int size() {
+        return list.size();
+    }
+
+    // TODO: javadoc
+    public void writeToContext( SvcLogicContext ctx ) {
+        ctx.setAttribute( prefix + "_length", Integer.toString(this.list.size()) );
+
+        for( int i = 0; i < this.list.size(); i++ ) {
+            for( Map.Entry<String,String> entry : this.list.get(i).entrySet() ) {
+                if("".equals(entry.getKey())) {
+                    ctx.setAttribute(prefix + '[' + i + ']', entry.getValue());
+                } else {
+                    ctx.setAttribute(prefix + '[' + i + "]." + entry.getKey(), entry.getValue());
+                }
+            }
+        }
+    }
+
+
+
+    // ========== PRIVATE STATIC FUNCTIONS ==========
+
+    // TODO: javadoc
+    private static int getCtxListIndex( String key, String prefix, int list_size ) {
+        int index = getCtxListIndex( key, prefix );
+        if( index >= list_size ) {
+            throw new IllegalArgumentException("Context memory list \"" + prefix + "[]\" contains an index >= the size of the list", new ArrayIndexOutOfBoundsException("index \"" + index + "\" is outside the bounds of the context memory list \"" + prefix + "[]. List Length = " + list_size));
+        } else if (index < 0) {
+            throw new IllegalArgumentException("Context memory list \"" + prefix + "[]\" contains a negative index", new NegativeArraySizeException("index \"" + index + "\" of context memory list is negative"));
+        }
+
+        return index;
+    }
+
+    // TODO: javadoc
+    private static int getCtxListIndex( String key, String prefix ) {
+        String ctx_index_str = StringUtils.substringBetween(key.substring(prefix.length()), "[", "]");
+        try {
+            return Integer.parseInt( ctx_index_str );
+        } catch (NumberFormatException e) {
+            throw new IllegalStateException("Could not parse index value \"" + ctx_index_str + "\" in context memory key \"" + key + "\"", e);
+        }
+    }
+
+    // TODO: javadoc
+    private static int getCtxListLength( SvcLogicContext ctx, String prefix ) {
+        String _length_key = prefix + "_length";
+        String _length_val_str = ctx.getAttribute(_length_key);
+        try {
+            return Integer.parseInt(_length_val_str);
+        } catch (NumberFormatException e) {
+            if( _length_val_str == null ) {
+                throw new IllegalStateException( "Could not find list length \"" + _length_key + "\" in context memory." );
+            } else {
+                throw new IllegalStateException( "Could not parse index value \"" + _length_val_str + "\" of context memory list length \"" + _length_key + "\"" , e );
+            }
+        }
+    }
+}
diff --git a/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SvcLogicContextObject.java b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SvcLogicContextObject.java
new file mode 100644
index 000000000..aa41a5c60
--- /dev/null
+++ b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/SvcLogicContextObject.java
@@ -0,0 +1,28 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : CCSDK
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights
+ * 						reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.ccsdk.sli.core.slipluginutils;
+
+import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
+
+public interface SvcLogicContextObject {
+    void writeToContext(SvcLogicContext ctx, String root );
+}
diff --git a/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/commondatastructures/YesNo.java b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/commondatastructures/YesNo.java
new file mode 100644
index 000000000..5db752e29
--- /dev/null
+++ b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/commondatastructures/YesNo.java
@@ -0,0 +1,51 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : CCSDK
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights
+ * 						reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ *
+ */
+package org.onap.ccsdk.sli.core.slipluginutils.commondatastructures;
+
+/**
+ * An enum found in many Yang models. It is commonly used as a
+ * substitute for boolean.
+ */
+public enum YesNo {
+    N, Y;
+
+    /**
+     * Method overload for {@link #valueOf(String)} for the char primative
+     */
+    public static YesNo valueOf( final char name ) {
+        return YesNo.valueOf( Character.toString(name) );
+    }
+
+    /**
+     * Method overload for {@link #valueOf(String)} for the Character object
+     */
+    public static YesNo valueOf( final Character name ) {
+        if( name == null ) {
+            return null;
+        }
+
+        return YesNo.valueOf( name.toString() );
+    }
+}
diff --git a/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/commondatastructures/package-info.java b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/commondatastructures/package-info.java
new file mode 100644
index 000000000..2aa949b03
--- /dev/null
+++ b/sliPluginUtils/provider/src/main/java/org/onap/ccsdk/sli/core/slipluginutils/commondatastructures/package-info.java
@@ -0,0 +1,28 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : CCSDK
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights
+ * 						reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+/**
+ *
+ */
+/**
+ *
+ */
+package org.onap.ccsdk.sli.core.slipluginutils.commondatastructures;