Java ByteBuffer Copy deepCopy(ByteBuffer orig)

Description

deep Copy

License

Open Source License

Declaration

public static ByteBuffer deepCopy(ByteBuffer orig) 

Method Source Code

//package com.java2s;
/*/*w ww  .ja v  a  2 s .  co  m*/
 * Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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.
 */

import java.nio.ByteBuffer;

public class Main {
    public static ByteBuffer deepCopy(ByteBuffer orig) {
        int pos = orig.position(), lim = orig.limit();
        try {
            orig.position(0).limit(orig.capacity()); // set range to entire buffer
            ByteBuffer toReturn = deepCopyVisible(orig); // deep copy range
            toReturn.position(pos).limit(lim); // set range to original
            return toReturn;
        } finally { // do in finally in case something goes wrong we don't bork the orig

            orig.position(pos).limit(lim); // restore original
        }
    }

    public static ByteBuffer deepCopyVisible(ByteBuffer orig) {
        int pos = orig.position();
        try {
            ByteBuffer toReturn;
            // try to maintain implementation to keep performance
            if (orig.isDirect()) {
                toReturn = ByteBuffer.allocateDirect(orig.remaining());
            } else {
                toReturn = ByteBuffer.allocate(orig.remaining());
            }

            toReturn.put(orig);
            toReturn.order(orig.order());

            return (ByteBuffer) toReturn.position(0);
        } finally {
            orig.position(pos);
        }
    }
}

Related

1. copyTo(ByteBuffer original, ByteBuffer copy)
2. copyToArray(@Nonnull ByteBuffer data)
3. copyToHeapBuffer(ByteBuffer src, ByteBuffer dest)
4. copyToStream(ByteBuffer byteBuffer, OutputStream os)
5. copyWholeFrame(ByteBuffer srcFrame, ByteBuffer destFrame)
6. deepCopyByteBufferToByteArray(ByteBuffer byteBuffer)
7. deepCopyVisible(ByteBuffer orig)
8. duplicate(ByteBuffer bb)
9. duplicate(ByteBuffer buffer)