| /* |
| * 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 org.apache.hyracks.data.std.api.IPointable; |
| import org.apache.hyracks.data.std.api.IPointableFactory; |
| |
| public class PointablePool { |
| private final Map<Class<? extends IPointable>, IPointableFactory> pfMap; |
| |
| private final Map<Class<? extends IPointable>, PointableCache<? extends IPointable>> pcMap; |
| |
| PointablePool() { |
| pfMap = new HashMap<Class<? extends IPointable>, IPointableFactory>(); |
| pcMap = new HashMap<Class<? extends IPointable>, PointableCache<? extends IPointable>>(); |
| } |
| |
| <T extends IPointable> void register(Class<T> klass, IPointableFactory factory) { |
| pfMap.put(klass, factory); |
| pcMap.put(klass, new PointableCache<T>()); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T extends IPointable> T takeOne(Class<T> klass) { |
| PointableCache<T> pc = (PointableCache<T>) pcMap.get(klass); |
| T p = pc.takeOne(); |
| if (p != null) { |
| return p; |
| } |
| IPointableFactory pf = pfMap.get(klass); |
| return (T) pf.createPointable(); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T extends IPointable> void giveBack(T pointable) { |
| PointableCache<T> pc = (PointableCache<T>) pcMap.get(pointable.getClass()); |
| pc.giveBack(pointable); |
| } |
| } |