Remove Multiplicity feature

The multiplicty feature is not working properly around relantionships
and demands more investigation in order to identify the issues.
In the future we might add this back.
For reference multiplicity was added under AAI-1197
Basically reversing the commit: d10a218c76633374f083f7a2802c198e93a6abae

Issue-ID: AAI-2124

Change-Id: I5d27b950841da08b00fbb422fb13136d43f0e3bd
Signed-off-by: Sanchez, Gabriel (gs882h) <gabriel.sanchez@amdocs.com>

5 files changed, 327 insertions, 415 deletions

diff --git a/src/main/java/org/onap/schema/validation/OxmModelValidator.java b/src/main/java/org/onap/schema/OxmModelValidator.java
index 9da835e..e691fd7 100644
--- a/src/main/java/org/onap/schema/validation/OxmModelValidator.java
+++ b/src/main/java/org/onap/schema/OxmModelValidator.java
@@ -18,7 +18,7 @@
  * limitations under the License.
  * ============LICENSE_END=========================================================
  */
-package org.onap.schema.validation;
+package org.onap.schema;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -36,7 +36,7 @@ import org.onap.crud.exception.CrudException;
 import org.onap.crud.logging.CrudServiceMsgs;
 import org.onap.crud.util.CrudServiceConstants;
 import org.onap.crud.util.CrudServiceUtil;
-import org.onap.schema.OxmModelLoader;
+
 import com.google.common.base.CaseFormat;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonNull;
diff --git a/src/main/java/org/onap/schema/RelationshipSchema.java b/src/main/java/org/onap/schema/RelationshipSchema.java
index 0cf419e..47b5b99 100644
--- a/src/main/java/org/onap/schema/RelationshipSchema.java
+++ b/src/main/java/org/onap/schema/RelationshipSchema.java
@@ -36,11 +36,7 @@ import com.google.common.collect.Multimap;
 
 public class RelationshipSchema {
 
-  public static final String SCHEMA_SOURCE_NODE_TYPE = "from";
-  public static final String SCHEMA_TARGET_NODE_TYPE = "to";
   public static final String SCHEMA_RELATIONSHIP_TYPE = "label";
-  public static final String SCHEMA_MULTIPLICITY_TYPE = "multiplicity";
-  public static final String SCHEMA_RULES_ARRAY = "rules";
 
   private Map<String, Map<String, Class<?>>> relations = new HashMap<>();
   /**
@@ -48,8 +44,6 @@ public class RelationshipSchema {
    */
   private Map<String, Map<String, Class<?>>> relationTypes  = new HashMap<>();
 
-  private Map<String, EdgeRule> relationshipRules = new HashMap<>();
-  
   // A map storing the list of valid edge types for a source/target pair
   private Map<String, Set<String>> edgeTypesForNodePair = new HashMap<>();
   
@@ -60,8 +54,6 @@ public class RelationshipSchema {
 
     // hold the true values of the edge rules by key - convert to java 8
     for (EdgeRule rule : rules.values()) {
-      String key = buildRelation(rule.getFrom(), rule.getTo(), rule.getLabel());
-      relationshipRules.put(key, rule);
       
       String nodePairKey = buildNodePairKey(rule.getFrom(), rule.getTo());
       if (edgeTypesForNodePair.get(nodePairKey) == null) {
@@ -93,27 +85,6 @@ public class RelationshipSchema {
     return this.relations.get(key);
   }
 
-  /**
-   * Extract the multiplicity type from the Edge rules
-   *
-   * @param key
-   * @return
-   * @throws CrudException
-   */
-  public String lookupRelationMultiplicity(String key) throws CrudException {
-    EdgeRule edgeRule = relationshipRules.get(key);
-
-    if (edgeRule == null) {
-      throw new CrudException("Invalid source/target/relationship type: " + key, Status.BAD_REQUEST);
-    }
-
-    if (edgeRule.getMultiplicityRule() != null) {
-      return edgeRule.getMultiplicityRule().toString();
-    }
-
-    return null;
-  }
-
   public Map<String, Class<?>> lookupRelationType(String type) {
     return this.relationTypes.get(type);
   }
diff --git a/src/main/java/org/onap/schema/RelationshipSchemaValidator.java b/src/main/java/org/onap/schema/RelationshipSchemaValidator.java
new file mode 100644
index 0000000..4f24071
--- /dev/null
+++ b/src/main/java/org/onap/schema/RelationshipSchemaValidator.java
@@ -0,0 +1,325 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017-2018 Amdocs
+ * ================================================================================
+ * 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.schema;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.ws.rs.core.Response.Status;
+
+import org.onap.crud.entity.Edge;
+import org.onap.crud.entity.Vertex;
+import org.onap.crud.exception.CrudException;
+import org.onap.crud.service.EdgePayload;
+import org.onap.crud.util.CrudServiceUtil;
+import org.onap.schema.OxmModelValidator.Metadata;
+import org.radeox.util.logging.Logger;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonNull;
+
+public class RelationshipSchemaValidator {
+
+	public static final String SOURCE_NODE = "source";
+	public static final String TARGET_NODE = "target";
+	
+	final static Pattern urlPattern = Pattern.compile("services/inventory/(.*)/(.*)/(.*)");
+	
+	public static Map<String, Object> resolveCollectionfilter(String version, String type,Map<String, String> filter)  throws CrudException {
+    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
+    if (schema == null) {
+      throw new CrudException("", Status.NOT_FOUND);
+    }
+
+    Map<String, Class<?>> props = schema.lookupRelationType(type);
+    Map<String, Object> result = new HashMap<String, Object>();
+
+    for (String key : filter.keySet()) {
+
+      if (props.containsKey(key)) {
+        try {
+          Object value = CrudServiceUtil.validateFieldType(filter.get(key), props.get(key));
+          result.put(key, value);
+        } catch (Exception ex) {
+          // Skip any exceptions thrown while validating the filter key value
+          continue;
+        }
+      }
+    }
+    return result;
+  }
+
+  public static void validateType(String version, String type) throws CrudException {
+    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
+    if (!schema.isValidType(type)) {
+      throw new CrudException("Invalid " + RelationshipSchema.SCHEMA_RELATIONSHIP_TYPE
+          + ": " + type,
+          Status.BAD_REQUEST);
+    }
+
+  }
+
+  public static Edge validateIncomingAddPayload(String version, String type, Vertex sourceNode, Vertex targetNode, JsonElement properties) throws CrudException {
+	EdgePayload payload = new EdgePayload();
+	payload.setSource("services/inventory/" + version + "/" + sourceNode.getType() + "/" + sourceNode.getId().get());
+	payload.setTarget("services/inventory/" + version + "/" + targetNode.getType() + "/" + targetNode.getId().get());
+	payload.setType(type);
+	payload.setProperties(properties);
+	
+	return validateIncomingAddPayload(version, type, payload);
+  }
+
+  public static Edge validateIncomingAddPayload(String version, String type, EdgePayload payload)
+      throws CrudException {
+    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
+
+    try {
+      if (payload.getSource() == null || payload.getTarget() == null) {
+        throw new CrudException("Source/Target not specified", Status.BAD_REQUEST);
+      }
+
+      Matcher sourceMatcher = urlPattern.matcher(payload.getSource());
+      Matcher targetMatcher = urlPattern.matcher(payload.getTarget());
+      
+      if (!sourceMatcher.matches() || !targetMatcher.matches()) {
+    	  throw new CrudException("Invalid Source/Target Urls", Status.BAD_REQUEST);
+      }
+      
+      // create key based on source:target:relationshipType
+      String sourceNodeType = sourceMatcher.group(2);
+      String targetNodeType = targetMatcher.group(2);
+      
+      String sourceNodeId = sourceMatcher.group(3);
+      String targetNodeId = targetMatcher.group(3);
+      
+      String key = sourceNodeType + ":" + targetNodeType + ":" + type;
+
+      // find the validate the key from the schema
+      Map<String, Class<?>> schemaObject = schema.lookupRelation(key);
+
+      if (schemaObject == null) {
+        throw new CrudException("Invalid source/target/relationship type: " + key, Status.BAD_REQUEST);
+      }
+
+      Edge.Builder modelEdgeBuilder = new Edge.Builder(type);
+      
+      modelEdgeBuilder.source(new Vertex.Builder(sourceNodeType).id(sourceNodeId).build());
+      modelEdgeBuilder.target(new Vertex.Builder(targetNodeType).id(targetNodeId).build());
+
+      // validate it properties
+      validateEdgeProps(modelEdgeBuilder, payload.getProperties(), schemaObject);
+
+      return modelEdgeBuilder.build();
+    } catch (Exception ex) {
+      throw new CrudException(ex.getMessage(), Status.BAD_REQUEST);
+    }
+  }
+
+  public static Edge validateIncomingPatchPayload(Edge edge, String version, EdgePayload payload)
+	      throws CrudException {
+	    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
+
+	    try {
+	    	if (payload.getSource() != null) {
+	    		Matcher sourceMatcher = urlPattern.matcher(payload.getSource());
+	    		
+	    		if (!sourceMatcher.matches()) {
+	    			throw new CrudException("Invalid Source Urls", Status.BAD_REQUEST);
+	    		}
+	    		String sourceNodeId = sourceMatcher.group(3);
+	    		if (!sourceNodeId.equals(edge.getSource().getId().get())) {
+	    			throw new CrudException("Source can't be updated", Status.BAD_REQUEST);
+	    		}
+	    	}
+	    	
+	    	if (payload.getTarget() != null) {
+	    		Matcher targetMatcher = urlPattern.matcher(payload.getTarget());
+	    		 
+	    		if (!targetMatcher.matches()) {
+	    			throw new CrudException("Invalid Target Urls", Status.BAD_REQUEST);
+	    		}
+	    		String sourceNodeId = targetMatcher.group(3);
+	    		if (!sourceNodeId.equals(edge.getTarget().getId().get())) {
+	    			throw new CrudException("Target can't be updated", Status.BAD_REQUEST);
+	    		}
+	    	}
+
+	      // Remove the timestamp properties from the existing edge, as these should be managed by Champ.
+	      Map<String,Object> existingProps = edge.getProperties();
+
+	      if (existingProps.containsKey(Metadata.CREATED_TS.propertyName())) {
+	        existingProps.remove(Metadata.CREATED_TS.propertyName());
+	      }
+	      if (existingProps.containsKey(Metadata.UPDATED_TS.propertyName())) {
+	        existingProps.remove(Metadata.UPDATED_TS.propertyName());
+	      }
+
+	      // create key based on source:target:relationshipType
+	      String key = edge.getSource().getType() + ":" + edge.getTarget().getType()
+	          + ":" + edge.getType();
+
+	      // find the validate the key from the schema
+	      Map<String, Class<?>> schemaObject = schema.lookupRelation(key);
+
+	      if (schemaObject == null) {
+	        Logger.warn("key :" + key
+	            + " not found in relationship schema . Skipping the schema validation");
+	        return edge;
+	      }
+
+	      Set<Map.Entry<String, JsonElement>> entries = payload.getProperties().getAsJsonObject().entrySet();
+
+	      for (Map.Entry<String, JsonElement> entry : entries) {
+	    	  if (!schemaObject.containsKey(entry.getKey())) {
+	    		  throw new CrudException("Invalid property: " + entry.getKey(), Status.BAD_REQUEST);
+	    	  } else if (entry.getValue() instanceof JsonNull && edge.getProperties().containsKey(entry.getKey())) {
+	    		  edge.getProperties().remove(entry.getKey());
+	    	  } else if (!(entry.getValue() instanceof JsonNull)) {
+	    		  Object value = CrudServiceUtil.validateFieldType(entry.getValue().getAsString(), schemaObject.get(entry.getKey()));
+	    		  edge.getProperties().put(entry.getKey(), value);
+	    	  }
+	      }
+	      
+    	  return edge;
+      } catch (Exception ex) {
+    	  throw new CrudException(ex.getMessage(), Status.BAD_REQUEST);
+      }
+  }
+
+
+  public static Edge validateIncomingUpdatePayload(Edge edge, String version, Vertex sourceNode, Vertex targetNode, JsonElement properties) 
+		  throws CrudException {
+	  EdgePayload payload = new EdgePayload();
+	  payload.setSource("services/inventory/" + version + "/" + sourceNode.getType() + "/" + sourceNode.getId().get());
+	  payload.setTarget("services/inventory/" + version + "/" + targetNode.getType() + "/" + targetNode.getId().get());
+	  payload.setType(edge.getType());
+	  payload.setProperties(properties);
+	  return validateIncomingUpdatePayload(edge, version, payload);
+  }
+
+  public static Edge validateIncomingUpdatePayload(Edge edge, String version, EdgePayload payload)
+      throws CrudException {
+    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
+
+    try {
+    	if (payload.getSource() != null) {
+    		Matcher sourceMatcher = urlPattern.matcher(payload.getSource());
+    		
+    		if (!sourceMatcher.matches()) {
+    			throw new CrudException("Invalid Source Urls", Status.BAD_REQUEST);
+    		}
+    		String sourceNodeId = sourceMatcher.group(3);
+    		if (!sourceNodeId.equals(edge.getSource().getId().get())) {
+    			throw new CrudException("Source can't be updated", Status.BAD_REQUEST);
+    		}
+    	}
+    	
+    	if (payload.getTarget() != null) {
+    		Matcher targetMatcher = urlPattern.matcher(payload.getTarget());
+    		
+    		if (!targetMatcher.matches()) {
+    			throw new CrudException("Invalid Target Urls", Status.BAD_REQUEST);
+    		}
+    		String sourceNodeId = targetMatcher.group(3);
+    		if (!sourceNodeId.equals(edge.getTarget().getId().get())) {
+    			throw new CrudException("Target can't be updated", Status.BAD_REQUEST);
+    		}
+    	}
+
+      // create key based on source:target:relationshipType
+      String key = edge.getSource().getType() + ":" + edge.getTarget().getType()
+          + ":" + edge.getType();
+
+      // find the validate the key from the schema
+      Map<String, Class<?>> schemaObject = schema.lookupRelation(key);
+
+      if (schemaObject == null) {
+        Logger.warn("key :" + key
+            + " not found in relationship schema . Skipping the schema validation");
+        return edge;
+      }
+
+      Edge.Builder updatedEdgeBuilder = new Edge.Builder(edge.getType()).id(edge.getId().get());
+      
+      updatedEdgeBuilder.source(new Vertex.Builder(edge.getSource().getType()).id(edge.getSource().getId().get()).build());
+      updatedEdgeBuilder.target(new Vertex.Builder(edge.getTarget().getType()).id(edge.getTarget().getId().get()).build());
+
+      validateEdgeProps(updatedEdgeBuilder, payload.getProperties(), schemaObject);
+
+      return updatedEdgeBuilder.build();
+    } catch (Exception ex) {
+      throw new CrudException(ex.getMessage(), Status.BAD_REQUEST);
+    }
+  }
+
+
+  private static void validateEdgeProps(Edge.Builder builder, JsonElement props, Map<String, Class<?>> schemaObject) throws CrudException {
+    Set<Map.Entry<String, JsonElement>> entries = props.getAsJsonObject().entrySet();
+
+    for (Map.Entry<String, JsonElement> entry : entries) {
+      if (!schemaObject.containsKey(entry.getKey())) {
+        throw new CrudException("Invalid property: " + entry.getKey(), Status.BAD_REQUEST);
+      } else {
+        Object value = CrudServiceUtil.validateFieldType(entry.getValue().getAsString(),
+            schemaObject.get(entry.getKey()));
+        builder.property(entry.getKey(), value);
+      }
+    }
+  }
+
+  public static Edge validateOutgoingPayload(String version, Edge edge) throws CrudException {
+    Edge.Builder modelEdgeBuilder = new Edge.Builder(edge.getType()).id(edge.getId()
+        .get()).source(edge.getSource())
+        .target(edge.getTarget());
+
+    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
+
+    String key = edge.getSource().getType() + ":" + edge.getTarget().getType()
+        + ":" + edge.getType();
+    Map<String, Class<?>> schemaObject = schema.lookupRelation(key);
+
+    if (schemaObject == null || schemaObject.isEmpty()) {
+      return edge;
+    }
+
+    for (String prop : edge.getProperties().keySet()) {
+      if (schemaObject.containsKey(prop)) {
+        modelEdgeBuilder.property(prop, edge.getProperties().get(prop));
+      }
+
+    }
+    return modelEdgeBuilder.build();
+  }
+  
+  public static String vertexTypeFromUri(String uri) throws CrudException {
+
+	  Matcher matcher = urlPattern.matcher(uri);
+	  
+	  if (!matcher.matches()) {
+		  throw new CrudException("Invalid Source/Target Urls", Status.BAD_REQUEST);
+	  }
+	  
+	  return matcher.group(2);
+  }
+}
diff --git a/src/main/java/org/onap/schema/validation/MultiplicityValidator.java b/src/main/java/org/onap/schema/validation/MultiplicityValidator.java
deleted file mode 100644
index 1c1075c..0000000
--- a/src/main/java/org/onap/schema/validation/MultiplicityValidator.java
+++ /dev/null
@@ -1,119 +0,0 @@
-/**

- * ============LICENSE_START=======================================================

- * org.onap.aai

- * ================================================================================

- * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.

- * Copyright © 2017-2018 Amdocs

- * ================================================================================

- * 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.schema.validation;

-

-import java.util.List;

-import javax.ws.rs.core.Response.Status;

-import org.onap.crud.entity.Edge;

-import org.onap.crud.exception.CrudException;

-import org.onap.crud.parser.EdgePayload;

-import org.onap.crud.parser.util.EdgePayloadUtil;

-import org.onap.schema.EdgeRulesLoader;

-import org.onap.schema.RelationshipSchema;

-

-/**

- * Validator to enforce multiplicity rules on the creation of a new Edge

- *

- */

-public class MultiplicityValidator {

-

-    public enum MultiplicityType {

-        MANY2ONE("Many2One"), MANY2MANY("Many2Many"), ONE2MANY("One2Many"), ONE2ONE("One2One");

-

-        private final String value;

-

-        MultiplicityType(String value) {

-            this.value = value;

-        }

-

-        public String getValue() {

-            return value;

-        }

-    }

-

-    /**

-     * Validates the Edge payload's source and target vertices against multiplicity rule

-     *

-     * @param payload

-     * @param edgesForSourceVertex

-     * @param edgesForTargetVertex

-     * @param type

-     * @param version

-     * @throws CrudException

-     */

-    public static void validatePayloadMultiplicity(EdgePayload payload, List<Edge> edgesForSourceVertex,

-            List<Edge> edgesForTargetVertex, String type, String version)

-            throws CrudException {

-        RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);

-        // find the validate the key from the schema

-        String key = EdgePayloadUtil.generateEdgeKey(payload.getSource(), payload.getTarget(), type);

-

-        // get the multiplicity rule for the relationships

-        String multiplicityTypeValue = schema.lookupRelationMultiplicity(key);

-        if (multiplicityTypeValue != null) {

-            MultiplicityType multiplicityType = MultiplicityType.valueOf(multiplicityTypeValue.toUpperCase());

-

-            boolean isVertexValidForMultiplicityType =

-                    isVertexValidForMultiplicityType(edgesForSourceVertex, edgesForTargetVertex, multiplicityType);

-

-            if (!isVertexValidForMultiplicityType) {

-                throw new CrudException(

-                        multiplicityType.toString() + " multiplicity rule broken for Edge:" + key,

-                        Status.BAD_REQUEST);

-            }

-        }

-    }

-

-    /**

-     * Compare vertex existing relationships to ensure its not in breach of multiplicity rules

-     *

-     * @param edgesForVertex

-     * @param multiplicityType

-     * @return

-     */

-    public static Boolean isVertexValidForMultiplicityType(List<Edge> edgesForSourceVertex,

-            List<Edge> edgesForTargetVertex,

-            MultiplicityType multiplicityType) {

-

-        switch (multiplicityType) {

-            case MANY2MANY:

-                return true;

-            case MANY2ONE:

-                if (edgesForSourceVertex != null && !edgesForSourceVertex.isEmpty()) {

-                    return false;

-                }

-                break;

-            case ONE2MANY:

-                if (edgesForTargetVertex != null && !edgesForTargetVertex.isEmpty()) {

-                    return false;

-                }

-                break;

-            case ONE2ONE:

-                if ((edgesForSourceVertex != null && !edgesForSourceVertex.isEmpty())

-                        || (edgesForTargetVertex != null && !edgesForTargetVertex.isEmpty())) {

-                    return false;

-                }

-                break;

-        }

-        return true;

-    }

-

-}
\ No newline at end of file
diff --git a/src/main/java/org/onap/schema/validation/RelationshipSchemaValidator.java b/src/main/java/org/onap/schema/validation/RelationshipSchemaValidator.java
deleted file mode 100644
index f2717d5..0000000
--- a/src/main/java/org/onap/schema/validation/RelationshipSchemaValidator.java
+++ /dev/null
@@ -1,265 +0,0 @@
-/**
- * ============LICENSE_START=======================================================
- * org.onap.aai
- * ================================================================================
- * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
- * Copyright © 2017-2018 Amdocs
- * ================================================================================
- * 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.schema.validation;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import javax.ws.rs.core.Response.Status;
-import org.onap.crud.entity.Edge;
-import org.onap.crud.entity.Vertex;
-import org.onap.crud.exception.CrudException;
-import org.onap.crud.parser.EdgePayload;
-import org.onap.crud.parser.util.EdgePayloadUtil;
-import org.onap.crud.util.CrudServiceUtil;
-import org.onap.schema.EdgeRulesLoader;
-import org.onap.schema.RelationshipSchema;
-import org.onap.schema.validation.OxmModelValidator.Metadata;
-import org.radeox.util.logging.Logger;
-import com.google.gson.JsonElement;
-import com.google.gson.JsonNull;
-
-public class RelationshipSchemaValidator {
-
-  private static final String SOURCE_LABEL = "Source";
-  private static final String TARGET_LABEL = "Target";
-
-  public static Map<String, Object> resolveCollectionfilter(String version, String type, Map<String, String> filter) throws CrudException {
-    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
-    if (schema == null) {
-      throw new CrudException("", Status.NOT_FOUND);
-    }
-
-    Map<String, Class<?>> props = schema.lookupRelationType(type);
-    Map<String, Object> result = new HashMap<String, Object>();
-
-    for (String key : filter.keySet()) {
-
-      if (props.containsKey(key)) {
-        try {
-          Object value = CrudServiceUtil.validateFieldType(filter.get(key), props.get(key));
-          result.put(key, value);
-        } catch (Exception ex) {
-          // Skip any exceptions thrown while validating the filter key value
-          continue;
-        }
-      }
-    }
-    return result;
-  }
-
-  public static void validateType(String version, String type) throws CrudException {
-    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
-    if (!schema.isValidType(type)) {
-      throw new CrudException("Invalid " + RelationshipSchema.SCHEMA_RELATIONSHIP_TYPE
-          + ": " + type,
-          Status.BAD_REQUEST);
-    }
-
-  }
-
-  public static Edge validateIncomingAddPayload(String version, String type, EdgePayload payload,
-    List<Edge> sourceVertexEdges, List<Edge> targetVertexEdges) throws CrudException {
-
-    //perform standard validation
-    Edge edge = validateIncomingAddPayload(version, type, payload);
-
-    // validate payload using multiplicity edge rules
-    MultiplicityValidator.validatePayloadMultiplicity(payload, sourceVertexEdges, targetVertexEdges, type, version);
-
-    return edge;
-  }
-
-  public static Edge validateIncomingAddPayload(String version, String type, EdgePayload payload)
-      throws CrudException {
-    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
-
-    try {
-      if (payload.getSource() == null || payload.getTarget() == null) {
-        throw new CrudException("Source/Target not specified", Status.BAD_REQUEST);
-      }
-
-      String key = EdgePayloadUtil.generateEdgeKey(payload.getSource(), payload.getTarget(), type);
-
-      // find the validate the key from the schema
-      Map<String, Class<?>> schemaObject = schema.lookupRelation(key);
-
-      if (schemaObject == null) {
-        throw new CrudException("Invalid source/target/relationship type: " + key, Status.BAD_REQUEST);
-      }
-
-      Edge.Builder modelEdgeBuilder = EdgePayloadUtil.getBuilderFromEdgePayload(payload.getSource(), payload.getTarget(), type);
-
-      // validate it properties
-      validateEdgeProps(modelEdgeBuilder, payload.getProperties(), schemaObject);
-
-      return modelEdgeBuilder.build();
-    } catch (Exception ex) {
-      throw new CrudException(ex.getMessage(), Status.BAD_REQUEST);
-    }
-  }
-
-  public static Edge validateIncomingPatchPayload(Edge edge, String version, EdgePayload payload)
-      throws CrudException {
-    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
-
-    try {
-      validateEdgeVertexMatchesPayload(edge.getSource(), payload.getSource(), SOURCE_LABEL);
-      validateEdgeVertexMatchesPayload(edge.getTarget(), payload.getTarget(), TARGET_LABEL);
-
-      // Remove the timestamp properties from the existing edge, as these should be managed by Champ.
-      Map<String,Object> existingProps = edge.getProperties();
-
-      if (existingProps.containsKey(Metadata.CREATED_TS.propertyName())) {
-        existingProps.remove(Metadata.CREATED_TS.propertyName());
-      }
-      if (existingProps.containsKey(Metadata.UPDATED_TS.propertyName())) {
-        existingProps.remove(Metadata.UPDATED_TS.propertyName());
-      }
-
-      // create key based on source:target:relationshipType
-      String key = edge.getSource().getType() + ":" + edge.getTarget().getType()
-          + ":" + edge.getType();
-
-      // find the validate the key from the schema
-      Map<String, Class<?>> schemaObject = schema.lookupRelation(key);
-
-      if (schemaObject == null) {
-        Logger.warn("key :" + key
-            + " not found in relationship schema . Skipping the schema validation");
-        return edge;
-      }
-
-      validateEdgePropertiesFromPayload(edge, payload, schemaObject);
-
-      return edge;
-    } catch (Exception ex) {
-      throw new CrudException(ex.getMessage(), Status.BAD_REQUEST);
-    }
-  }
-
-  private static void validateEdgePropertiesFromPayload(Edge edge, EdgePayload payload, Map<String, Class<?>> schemaObject) throws CrudException {
-    Set<Map.Entry<String, JsonElement>> entries = payload.getProperties().getAsJsonObject().entrySet();
-    for (Map.Entry<String, JsonElement> entry : entries) {
-
-      if (!schemaObject.containsKey(entry.getKey())) {
-        throw new CrudException("Invalid property: " + entry.getKey(), Status.BAD_REQUEST);
-      } else if (entry.getValue() instanceof JsonNull && edge.getProperties().containsKey(entry.getKey())) {
-        edge.getProperties().remove(entry.getKey());
-      } else if (!(entry.getValue() instanceof JsonNull)) {
-        Object value = CrudServiceUtil.validateFieldType(entry.getValue().getAsString(), schemaObject.get(entry.getKey()));
-        edge.getProperties().put(entry.getKey(), value);
-      }
-    }
-  }
-
-
-  public static Edge validateIncomingUpdatePayload(Edge edge, String version, EdgePayload payload, String type,
-            List<Edge> sourceVertexEdges, List<Edge> targetVertexEdges) throws CrudException {
-
-    //perform standard validation
-    Edge validatedEdge = validateIncomingUpdatePayload(edge, version, payload);
-
-    // validate payload using multiplicity edge rules
-    MultiplicityValidator.validatePayloadMultiplicity(payload, sourceVertexEdges, targetVertexEdges, type, version);
-
-    return validatedEdge;
-  }
-
-  public static Edge validateIncomingUpdatePayload(Edge edge, String version, EdgePayload payload)
-      throws CrudException {
-    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
-
-    try {
-      validateEdgeVertexMatchesPayload(edge.getSource(), payload.getSource(), SOURCE_LABEL);
-      validateEdgeVertexMatchesPayload(edge.getTarget(), payload.getTarget(), TARGET_LABEL);
-
-      // create key based on source:target:relationshipType
-      String key = edge.getSource().getType() + ":" + edge.getTarget().getType()
-          + ":" + edge.getType();
-
-      // find the validate the key from the schema
-      Map<String, Class<?>> schemaObject = schema.lookupRelation(key);
-
-      if (schemaObject == null) {
-        Logger.warn("key :" + key
-            + " not found in relationship schema . Skipping the schema validation");
-        return edge;
-      }
-
-      Edge.Builder updatedEdgeBuilder = EdgePayloadUtil.getBuilderFromEdge(edge);
-
-      validateEdgeProps(updatedEdgeBuilder, payload.getProperties(), schemaObject);
-
-      return updatedEdgeBuilder.build();
-    } catch (Exception ex) {
-      throw new CrudException(ex.getMessage(), Status.BAD_REQUEST);
-    }
-  }
-
-  private static void validateEdgeVertexMatchesPayload(Vertex edgeVertex, String payloadVertex, String vertexTypeLabel) throws CrudException {
-    if (payloadVertex != null) {
-      String sourceNodeId = EdgePayloadUtil.getVertexNodeId(payloadVertex);
-      if (!sourceNodeId.equals(edgeVertex.getId().get())) {
-        throw new CrudException(vertexTypeLabel + " can't be updated", Status.BAD_REQUEST);
-      }
-    }
-  }
-
-  private static void validateEdgeProps(Edge.Builder builder, JsonElement props, Map<String, Class<?>> schemaObject) throws CrudException {
-    Set<Map.Entry<String, JsonElement>> entries = props.getAsJsonObject().entrySet();
-
-    for (Map.Entry<String, JsonElement> entry : entries) {
-      if (!schemaObject.containsKey(entry.getKey())) {
-        throw new CrudException("Invalid property: " + entry.getKey(), Status.BAD_REQUEST);
-      } else {
-        Object value = CrudServiceUtil.validateFieldType(entry.getValue().getAsString(),
-            schemaObject.get(entry.getKey()));
-        builder.property(entry.getKey(), value);
-      }
-    }
-  }
-
-  public static Edge validateOutgoingPayload(String version, Edge edge) throws CrudException {
-    Edge.Builder modelEdgeBuilder = new Edge.Builder(edge.getType()).id(edge.getId()
-        .get()).source(edge.getSource())
-        .target(edge.getTarget());
-
-    RelationshipSchema schema = EdgeRulesLoader.getSchemaForVersion(version);
-
-    String key = edge.getSource().getType() + ":" + edge.getTarget().getType()
-        + ":" + edge.getType();
-    Map<String, Class<?>> schemaObject = schema.lookupRelation(key);
-
-    if (schemaObject == null || schemaObject.isEmpty()) {
-      return edge;
-    }
-
-    for (String prop : edge.getProperties().keySet()) {
-      if (schemaObject.containsKey(prop)) {
-        modelEdgeBuilder.property(prop, edge.getProperties().get(prop));
-      }
-
-    }
-    return modelEdgeBuilder.build();
-  }
-}