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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 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.aai.db;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.VertexProperty;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.introspection.Introspector;
import org.onap.aai.introspection.Loader;
import org.onap.aai.introspection.exceptions.AAIUnknownObjectException;
import org.onap.aai.parsers.query.QueryParser;
import org.onap.aai.parsers.relationship.RelationshipToURI;
import org.onap.aai.query.builder.QueryBuilder;
import org.onap.aai.serialization.engines.TransactionalGraphEngine;
public class DbMethHelper {
private final Loader loader;
private final TransactionalGraphEngine engine;
protected DbMethHelper() {
this.loader = null;
this.engine = null;
}
public DbMethHelper(Loader loader, TransactionalGraphEngine engine) {
this.loader = loader;
this.engine = engine;
}
/**
*
* @param type
* @param map - form [{type}.{propname}:{value}]
* @return
* @throws UnsupportedEncodingException
* @throws AAIException
*/
public Optional<Vertex> searchVertexByIdentityMap(String type, Map<String, Object> map) throws AAIException {
Introspector relationship = constructRelationship(type, map);
RelationshipToURI parser;
URI uri;
QueryParser queryParser;
try {
parser = new RelationshipToURI(loader, relationship);
uri = parser.getUri();
queryParser = this.engine.getQueryBuilder().createQueryFromURI(uri);
} catch (UnsupportedEncodingException e) {
throw new AAIException("AAI_3000");
}
List<Vertex> results = queryParser.getQueryBuilder().toList();
return reduceToSingleVertex(results, map);
}
/**
* @param type
* @param map - form [{propname}:{value}]
* @return
* @throws AAIException
*/
public Optional<Vertex> locateUniqueVertex(String type, Map<String, Object> map) throws AAIException {
return reduceToSingleVertex(locateUniqueVertices(type, map), map);
}
public List<Vertex> locateUniqueVertices(String type, Map<String, Object> map) throws AAIException {
Introspector obj = this.createIntrospectorFromMap(type, map);
QueryBuilder builder = this.engine.getQueryBuilder().exactMatchQuery(obj);
return builder.toList();
}
private Introspector constructRelationship(String type, Map<String, Object> map) throws AAIUnknownObjectException {
final Introspector relationship = loader.introspectorFromName("relationship");
relationship.setValue("related-to", type);
final List<Object> data = relationship.getValue("relationship-data");
for (Entry<String, Object> entry : map.entrySet()) {
final Introspector dataObj = loader.introspectorFromName("relationship-data");
dataObj.setValue("relationship-key", entry.getKey());
dataObj.setValue("relationship-value", entry.getValue());
data.add(dataObj.getUnderlyingObject());
}
return relationship;
}
private Introspector createIntrospectorFromMap(String targetNodeType, Map<String, Object> propHash) throws AAIUnknownObjectException {
final Introspector result = loader.introspectorFromName(targetNodeType);
for (Entry<String, Object> entry : propHash.entrySet()) {
result.setValue(entry.getKey(), entry.getValue());
}
return result;
}
private Optional<Vertex> reduceToSingleVertex(List<Vertex> vertices, Map<String, Object> map) throws AAIException {
if (vertices.isEmpty()){
return Optional.empty();
} else if (vertices.size() > 1) {
throw new AAIException("AAI_6112", "More than one Node found by getUniqueNode for params: " + map);
}
return Optional.of(vertices.get(0));
}
public List<String> getVertexProperties(Vertex v) {
List<String> retArr = new ArrayList<>();
if( v == null ){
retArr.add("null Node object passed to showPropertiesForNode()\n");
}
else {
String nodeType;
Object ob = v.<Object>property("aai-node-type").orElse(null);
if( ob == null ){
nodeType = "null";
}
else{
nodeType = ob.toString();
}
retArr.add(" AAINodeType/VtxID for this Node = [" + nodeType + "/" + v.id() + "]");
retArr.add(" Property Detail: ");
Iterator<VertexProperty<Object>> pI = v.properties();
while( pI.hasNext() ){
VertexProperty<Object> tp = pI.next();
Object val = tp.value();
retArr.add("Prop: [" + tp.key() + "], val = [" + val + "] ");
}
}
return retArr;
}
}
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