org.apache.vxquery.datamodel.accessors.PointablePool Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.vxquery.datamodel.accessors;
import java.util.HashMap;
import java.util.Map;
import edu.uci.ics.hyracks.data.std.api.IPointable;
import edu.uci.ics.hyracks.data.std.api.IPointableFactory;
public class PointablePool {
private final Map, IPointableFactory> pfMap;
private final Map, PointableCache> pcMap;
PointablePool() {
pfMap = new HashMap, IPointableFactory>();
pcMap = new HashMap, PointableCache>();
}
void register(Class klass, IPointableFactory factory) {
pfMap.put(klass, factory);
pcMap.put(klass, new PointableCache());
}
@SuppressWarnings("unchecked")
public T takeOne(Class klass) {
PointableCache pc = (PointableCache) pcMap.get(klass);
T p = pc.takeOne();
if (p != null) {
return p;
}
IPointableFactory pf = pfMap.get(klass);
return (T) pf.createPointable();
}
@SuppressWarnings("unchecked")
public void giveBack(T pointable) {
PointableCache pc = (PointableCache) pcMap.get(pointable.getClass());
pc.giveBack(pointable);
}
}