diff options
Diffstat (limited to 'sliPluginUtils/provider/src/main/java/org/openecomp/sdnc/sli/SliPluginUtils/SvcLogicContextList.java')
-rw-r--r-- | sliPluginUtils/provider/src/main/java/org/openecomp/sdnc/sli/SliPluginUtils/SvcLogicContextList.java | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/sliPluginUtils/provider/src/main/java/org/openecomp/sdnc/sli/SliPluginUtils/SvcLogicContextList.java b/sliPluginUtils/provider/src/main/java/org/openecomp/sdnc/sli/SliPluginUtils/SvcLogicContextList.java new file mode 100644 index 00000000..89a4a98f --- /dev/null +++ b/sliPluginUtils/provider/src/main/java/org/openecomp/sdnc/sli/SliPluginUtils/SvcLogicContextList.java @@ -0,0 +1,210 @@ +/*- + * ============LICENSE_START======================================================= + * openECOMP : SDN-C + * ================================================================================ + * 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.openecomp.sdnc.sli.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.openecomp.sdnc.sli.SvcLogicContext; + +/** + * A utility class used to manage list manipulation in the context memory. + * @see org.openecomp.sdnc.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<HashMap<String, String>>(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( entry.getKey().equals("") ) { + 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 ); + } + } + } +} |