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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.serialization.engines;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.process.traversal.strategy.verification.ReadOnlyStrategy;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.VertexProperty;
import org.janusgraph.core.JanusGraph;
import org.onap.aai.introspection.Loader;
import org.onap.aai.query.builder.*;
import org.onap.aai.serialization.db.InMemoryGraphSingleton;
import org.onap.aai.serialization.engines.query.GraphTraversalQueryEngine;
import org.onap.aai.serialization.engines.query.QueryEngine;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class InMemoryDBEngine extends TransactionalGraphEngine {
/**
* Instantiates a new JanusGraph DB engine.
*
* @param style
* the style
* @param loader
* the loader
*/
private JanusGraph graph = null;
public InMemoryDBEngine(QueryStyle style, Loader loader, JanusGraph graph) {
super(style, loader, InMemoryGraphSingleton.getInstance(graph));
this.graph = graph;
}
/**
* Instantiates a new JanusGraph DB engine.
*
* @param style
* the style
* @param loader
* the loader
* @param connect
* the connect
*/
public InMemoryDBEngine(QueryStyle style, Loader loader, boolean connect, JanusGraph graph) {
super(style, loader);
if (connect) {
this.singleton = InMemoryGraphSingleton.getInstance(graph);
}
this.graph = graph;
}
@Override
public QueryEngine getQueryEngine() {
if (style.equals(QueryStyle.TRAVERSAL) || style.equals(QueryStyle.TRAVERSAL_URI)) {
GraphTraversalSource traversalSource = graph.traversal();
return new GraphTraversalQueryEngine(traversalSource);
} else {
throw new IllegalArgumentException("Query Engine type not recognized");
}
}
@Override
public QueryBuilder<Vertex> getQueryBuilder(QueryStyle style, Loader loader) {
if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
return new GremlinTraversal<>(loader, graph.traversal());
} else if (style.equals(QueryStyle.TRAVERSAL)) {
return new TraversalQuery<>(loader, graph.traversal());
} else if (style.equals(QueryStyle.TRAVERSAL_URI)) {
return new TraversalURIOptimizedQuery<>(loader, graph.traversal());
} else {
throw new IllegalArgumentException("Query Builder type is Not recognized");
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean setListProperty(Vertex v, String name, List<?> objs) {
// clear out list full replace style
Iterator<VertexProperty<Object>> iterator = v.properties(name);
while (iterator.hasNext()) {
iterator.next().remove();
}
if (objs != null) {
for (Object obj : objs) {
v.property(name, obj);
}
}
return true;
}
/**
* {@inheritDoc}
*/
@Override
public List<Object> getListProperty(Vertex v, String name) {
List<Object> result = new ArrayList<>();
Iterator<VertexProperty<Object>> iterator = v.properties(name);
while (iterator.hasNext()) {
result.add(iterator.next().value());
}
if (result.isEmpty()) {
result = null;
}
return result;
}
@Override
public QueryBuilder<Vertex> getQueryBuilder() {
return getQueryBuilder(this.loader);
}
@Override
public QueryBuilder<Vertex> getQueryBuilder(Loader loader) {
if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
return new GremlinTraversal<>(loader, this.asAdmin().getTraversalSource());
} else if (style.equals(QueryStyle.GREMLIN_UNIQUE)) {
return new GremlinUnique<>(loader, this.asAdmin().getTraversalSource());
} else if (style.equals(QueryStyle.TRAVERSAL)) {
return new TraversalQuery<>(loader, graph.traversal());
} else if (style.equals(QueryStyle.TRAVERSAL_URI)) {
return new TraversalURIOptimizedQuery<>(loader, graph.traversal());
} else {
throw new IllegalArgumentException("Query Builder type not recognized");
}
}
@Override
public QueryBuilder<Vertex> getQueryBuilder(Vertex start) {
return getQueryBuilder(this.loader, start);
}
public GraphTraversalSource getTraversalSource() {
return graph.traversal();
}
@Override
public QueryBuilder<Vertex> getQueryBuilder(Loader loader, Vertex start) {
if (style.equals(QueryStyle.GREMLIN_TRAVERSAL)) {
return new GremlinTraversal<>(loader, graph.traversal(), start);
} else if (style.equals(QueryStyle.GREMLIN_UNIQUE)) {
return new GremlinUnique<>(loader, this.asAdmin().getTraversalSource(), start);
} else if (style.equals(QueryStyle.TRAVERSAL)) {
return new TraversalQuery<>(loader, graph.traversal(), start);
} else if (style.equals(QueryStyle.TRAVERSAL_URI)) {
return new TraversalURIOptimizedQuery<>(loader, graph.traversal(), start);
} else {
throw new IllegalArgumentException("Query Builder type not recognized");
}
}
@Override
public Graph startTransaction() {
if (this.tx() == null) {
this.currentTx = graph.newTransaction();
this.currentTraversal = this.tx().traversal();
this.readOnlyTraversal = this.tx().traversal().withStrategies(ReadOnlyStrategy.instance());
}
return currentTx;
}
}
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