// Copyright 2017 JanusGraph Authors
//
// 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.
package org.janusgraph.graphdb.transaction.indexcache;
import com.google.common.collect.HashMultimap;
import org.janusgraph.core.PropertyKey;
import org.janusgraph.core.JanusGraphVertexProperty;
import java.util.ArrayList;
import java.util.List;
/**
* @author Matthias Broecheler (me@matthiasb.com)
*/
public class ConcurrentIndexCache implements IndexCache {
private final HashMultimap<Object,JanusGraphVertexProperty> map;
public ConcurrentIndexCache() {
this.map = HashMultimap.create();
}
@Override
public synchronized void add(JanusGraphVertexProperty property) {
map.put(property.value(),property);
}
@Override
public synchronized void remove(JanusGraphVertexProperty property) {
map.remove(property.value(),property);
}
@Override
public synchronized Iterable<JanusGraphVertexProperty> get(final Object value, final PropertyKey key) {
List<JanusGraphVertexProperty> result = new ArrayList<JanusGraphVertexProperty>(4);
for (JanusGraphVertexProperty p : map.get(value)) {
if (p.propertyKey().equals(key)) result.add(p);
}
return result;
}
}