BufferUtil.java

/*
 * Copyright (c) www.bugull.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.
 */

package net.tooan.ynpay.third.mongodb.lucene.cluster;

import java.io.*;
import java.nio.ByteBuffer;

/**
 * Convert between Java Object and ByteBuffer.
 *
 * @author Frank Wen(xbwen@hotmail.com)
 */
public final class BufferUtil {

    /**
     * Convert a serializable object to buffer.
     *
     * @param obj
     * @return
     * @throws IOException
     */
    public static ByteBuffer toBuffer(Serializable obj) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(obj);
        oos.flush();
        ByteBuffer buffer = ByteBuffer.wrap(baos.toByteArray());
        oos.close();
        baos.close();
        return buffer;
    }

    /**
     * Deserialize an object from a buffer. The buffer maybe not full.
     *
     * @param buffer
     * @return
     * @throws IOException
     * @throws ClassNotFoundException
     */
    public static Object fromBuffer(ByteBuffer buffer) throws IOException, ClassNotFoundException {
        byte[] bytes = new byte[buffer.remaining()];
        buffer.get(bytes, 0, bytes.length);
        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
        ObjectInputStream ois = new ObjectInputStream(bais);
        Object obj = ois.readObject();
        ois.close();
        bais.close();
        return obj;
    }

}