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/**
* ============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;
}
}
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