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MSFTBX - Mass Spectrometry File Tool Box

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/* 
 * Copyright 2016 Dmitry Avtonomov.
 *
 * 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 umich.ms.util;

import org.apache.commons.pool2.BasePooledObjectFactory;
import org.apache.commons.pool2.PooledObject;
import org.apache.commons.pool2.impl.DefaultPooledObject;

/**
 * @author Dmitry Avtonomov
 */
public class ByteArrayHolderFactory extends BasePooledObjectFactory {
    protected volatile int defaultSize = 8192; // default to 8192

    public ByteArrayHolderFactory() {
    }

    public ByteArrayHolderFactory(int defaultSize) {
        this.defaultSize = defaultSize;
    }

    public int getDefaultSize() {
        return defaultSize;
    }

    /**
     * Sets the default size of byte buffers, produced by this factory.
     * @param defaultSize new default size
     */
    public synchronized void setDefaultSize(int defaultSize) {
        this.defaultSize = defaultSize;
    }

    /**
     * Updates the default byte buffer size, if the new value is larger, than
     * the current default.
     * @param defaultSize new default size
     */
    public synchronized void setDefaultSizeMax(int defaultSize) {
        if (this.defaultSize < defaultSize) {
            this.defaultSize = defaultSize;
        }
    }

    @Override
    public ByteArrayHolder create() throws Exception {
        return new ByteArrayHolder(getDefaultSize());
    }

    @Override
    public PooledObject wrap(ByteArrayHolder obj) {
        return new DefaultPooledObject<>(obj);
    }

    @Override
    public void passivateObject(PooledObject p) throws Exception {
        ByteArrayHolder bah = p.getObject();
        if (bah == null) return;
        bah.reset();
    }

    @Override
    public void activateObject(PooledObject p) throws Exception {
        ByteArrayHolder bah = p.getObject();
        if (bah == null) return;
        bah.reset();
    }
}