sg.atom.utils._commons.bean.orika.util.HashMapUtility.java Source code

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Here is the source code for sg.atom.utils._commons.bean.orika.util.HashMapUtility.java

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/*
 * Orika - simpler, better and faster Java bean mapping
 *
 * Copyright (C) 2011-2013 Orika 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 sg.atom.utils._commons.bean.orika.util;

import com.google.common.collect.MapMaker;
import java.util.concurrent.ConcurrentMap;

import sg.atom.utils.transform.mapping.MappedTypePair;

/**
 * HashMapUtility provides an wrapper for obtaining instances of ConcurrentMap
 * and is compatible with both 1.2 and later 1.x versions of this class.
 */
public class HashMapUtility {

    /**
     * Generates a new instance of ConcurrentMap with the specified max weighted
     * capacity
     *
     * @param keyClass
     * @param valClass
     * @param capacity
     * @return a new instance of ConcurrentMap with the specified max weighted
     * capacity
     */
    public static <K, V extends MappedTypePair<Object, Object>> ConcurrentMap<K, V> getConcurrentMap(int capacity) {

        MapMaker builder = new MapMaker();

        return builder.concurrencyLevel(capacity).makeMap();
    }
}