Here you can find the source of appendBuffers(ByteBuffer buffer, ByteBuffer buffer1, int incomingBufferSize, int BUFFER_STEP_SIZE)
| Parameter | Description |
|---|---|
| buffer | first buffer. |
| buffer1 | second buffer. |
static ByteBuffer appendBuffers(ByteBuffer buffer, ByteBuffer buffer1, int incomingBufferSize, int BUFFER_STEP_SIZE)
//package com.java2s; /*//from w w w . j av a2s .c o m * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 2015-2017 Oracle and/or its affiliates. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License"). You * may not use this file except in compliance with the License. You can * obtain a copy of the License at * https://oss.oracle.com/licenses/CDDL+GPL-1.1 * or LICENSE.txt. See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at LICENSE.txt. * * GPL Classpath Exception: * Oracle designates this particular file as subject to the "Classpath" * exception as provided by Oracle in the GPL Version 2 section of the License * file that accompanied this code. * * Modifications: * If applicable, add the following below the License Header, with the fields * enclosed by brackets [] replaced by your own identifying information: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license." If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above. However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. */ import java.nio.ByteBuffer; public class Main { /** * Concatenates two buffers into one. If buffer given as first argument has enough space for putting * the other one, it will be done and the original buffer will be returned. Otherwise new buffer will * be created. * * @param buffer first buffer. * @param buffer1 second buffer. * @return concatenation. */ static ByteBuffer appendBuffers(ByteBuffer buffer, ByteBuffer buffer1, int incomingBufferSize, int BUFFER_STEP_SIZE) { final int limit = buffer.limit(); final int capacity = buffer.capacity(); final int remaining = buffer.remaining(); final int len = buffer1.remaining(); // buffer1 will be appended to buffer if (len < (capacity - limit)) { buffer.mark(); buffer.position(limit); buffer.limit(capacity); buffer.put(buffer1); buffer.limit(limit + len); buffer.reset(); return buffer; // Remaining data is moved to left. Then new data is appended } else if (remaining + len < capacity) { buffer.compact(); buffer.put(buffer1); buffer.flip(); return buffer; // create new buffer } else { int newSize = remaining + len; if (newSize > incomingBufferSize) { throw new IllegalArgumentException("Buffer overflow"); } else { final int roundedSize = (newSize % BUFFER_STEP_SIZE) > 0 ? ((newSize / BUFFER_STEP_SIZE) + 1) * BUFFER_STEP_SIZE : newSize; final ByteBuffer result = ByteBuffer .allocate(roundedSize > incomingBufferSize ? newSize : roundedSize); result.put(buffer); result.put(buffer1); result.flip(); return result; } } } }