com.orientechnologies.orient.core.cache.OUnboundedWeakCache Maven / Gradle / Ivy
/*
*
* * Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
* *
* * 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.
* *
* * For more information: http://www.orientechnologies.com
*
*/
package com.orientechnologies.orient.core.cache;
import java.lang.ref.WeakReference;
import java.util.WeakHashMap;
import com.orientechnologies.orient.core.id.ORID;
import com.orientechnologies.orient.core.record.ORecord;
/**
* @author Artem Orobets (enisher-at-gmail.com)
*/
public class OUnboundedWeakCache extends OAbstractMapCache>> implements OCache {
public OUnboundedWeakCache() {
super(new WeakHashMap>());
}
@Override
public ORecord get(final ORID rid) {
final WeakReference value;
value = cache.get(rid);
return get(value);
}
@Override
public ORecord put(final ORecord record) {
final WeakReference value;
value = cache.put(record.getIdentity(), new WeakReference(record));
return get(value);
}
@Override
public ORecord remove(final ORID rid) {
final WeakReference value;
value = cache.remove(rid);
return get(value);
}
private ORecord get(WeakReference value) {
if (value == null)
return null;
else
return value.get();
}
}