| // |
| // ======================================================================== |
| // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.websocket.common.extensions.compress; |
| |
| import java.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jetty.util.BufferUtil; |
| import org.eclipse.jetty.websocket.api.MessageTooLargeException; |
| |
| public class ByteAccumulator |
| { |
| private final List<byte[]> chunks = new ArrayList<>(); |
| private final int maxSize; |
| private int length = 0; |
| |
| public ByteAccumulator(int maxOverallBufferSize) |
| { |
| this.maxSize = maxOverallBufferSize; |
| } |
| |
| public void copyChunk(byte buf[], int offset, int length) |
| { |
| if (this.length + length > maxSize) |
| { |
| throw new MessageTooLargeException("Frame is too large"); |
| } |
| |
| byte copy[] = new byte[length - offset]; |
| System.arraycopy(buf,offset,copy,0,length); |
| |
| chunks.add(copy); |
| this.length += length; |
| } |
| |
| public int getLength() |
| { |
| return length; |
| } |
| |
| public void transferTo(ByteBuffer buffer) |
| { |
| if (buffer.remaining() < length) |
| { |
| throw new IllegalArgumentException(String.format("Not enough space in ByteBuffer remaining [%d] for accumulated buffers length [%d]", |
| buffer.remaining(),length)); |
| } |
| |
| int position = buffer.position(); |
| for (byte[] chunk : chunks) |
| { |
| buffer.put(chunk,0,chunk.length); |
| } |
| BufferUtil.flipToFlush(buffer,position); |
| } |
| } |