| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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. |
| * |
| */ |
| |
| package org.apache.qpid.management.messages; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * AMQP Management messages codec. |
| * |
| * @author Andrea Gazzarini |
| */ |
| public class AmqpCoDec |
| { |
| private byte [] _buffer; |
| private int _position; |
| |
| /** |
| * Builds a new codec. |
| */ |
| AmqpCoDec() |
| { |
| _buffer = new byte [1000]; |
| _buffer[0] = 'A'; |
| _buffer[1] = 'M'; |
| _buffer[2] = '2'; |
| _position = 3; |
| } |
| |
| |
| /** |
| * Int32-to-4 byte array marshalling. |
| * Marshalles an integer using four bytes. |
| * |
| * @param data the result array. |
| * @param pos the starting position of the array to be filled. |
| * @param value the value to be marshalled. |
| */ |
| public final void pack32(int value) { |
| _buffer[_position++] = (byte) (value >> 24 & 0xff); |
| _buffer[_position++] = (byte) (value >> 16 & 0xff); |
| _buffer[_position++] = (byte) (value >> 8 & 0xff); |
| _buffer[_position++] = (byte) (value & 0xff); |
| } |
| |
| /** |
| * Int32-to-4 byte array marshalling. |
| * Marshalles an integer using four bytes. |
| * |
| * @param data the result array. |
| * @param pos the starting position of the array to be filled. |
| * @param value the value to be marshalled. |
| */ |
| public final void pack16(int value) { |
| _buffer[_position++] = (byte) (value >> 8 & 0xff); |
| _buffer[_position++] = (byte) (value & 0xff); |
| } |
| |
| /** |
| * Int32-to-4 byte array marshalling. |
| * Marshalles an integer using four bytes. |
| * |
| * @param data the result array. |
| * @param pos the starting position of the array to be filled. |
| * @param value the value to be marshalled. |
| */ |
| public final void pack64(long value) { |
| _buffer[_position++] = (byte) (value >> 56 & 0xff); |
| _buffer[_position++] = (byte) (value >> 48 & 0xff); |
| _buffer[_position++] = (byte) (value >> 40 & 0xff); |
| _buffer[_position++] = (byte) (value >> 32 & 0xff); |
| _buffer[_position++] = (byte) (value >> 24 & 0xff); |
| _buffer[_position++] = (byte) (value >> 16 & 0xff); |
| _buffer[_position++] = (byte) (value >> 8 & 0xff); |
| _buffer[_position++] = (byte) (value & 0xff); |
| } |
| |
| /** |
| * Int32-to-byte array marshalling. |
| * Marshalles an integer using two bytes. |
| * |
| * @param data the result array. |
| * @param pos the starting position of the array to be filled. |
| * @param value the value to be marshalled. |
| */ |
| public final void pack24(int value) { |
| _buffer[_position++] = (byte) (value >> 16 & 0xff); |
| _buffer[_position++] = (byte) (value >> 8 & 0xff); |
| _buffer[_position++] = (byte) (value & 0xff); |
| } |
| |
| public final void pack8(int value) { |
| _buffer[_position++] = (byte) (value & 0xff); |
| } |
| |
| public void pack8 (byte aByte) |
| { |
| _buffer[_position++] = aByte; |
| } |
| |
| public void packStr8(String aString) |
| { |
| try |
| { |
| byte [] toBytes = aString.getBytes("UTF-8"); |
| int length = toBytes.length; |
| pack8(length); |
| System.arraycopy(toBytes, 0, _buffer, _position, length); |
| _position+=length; |
| } catch (UnsupportedEncodingException exception) |
| { |
| throw new RuntimeException(exception); |
| } |
| } |
| |
| public void packStr16(String aString) |
| { |
| try |
| { |
| byte [] toBytes = aString.getBytes("UTF-8"); |
| int length = toBytes.length; |
| pack16(length); |
| System.arraycopy(toBytes, 0, _buffer, _position, length); |
| _position+=length; |
| } catch (UnsupportedEncodingException exception) |
| { |
| throw new RuntimeException(exception); |
| } |
| } |
| |
| public static final long unpack64(byte data[]) { |
| return ( |
| ((long) (data[0] & 0xff) << 56) | |
| ((long)(data[1] & 0xff) << 48) | |
| ((long)(data[2] & 0xff) << 40) | |
| ((long)(data[3] & 0xff) << 32) | |
| ((long)(data[4] & 0xff) << 24) | |
| ((long)(data[5] & 0xff) << 16) | |
| ((long)(data[6] & 0xff) << 8) | |
| (long) data[7] & 0xff); |
| } |
| |
| |
| public void pack (byte[] bytes) |
| { |
| System.arraycopy(bytes, 0, _buffer, _position, bytes.length); |
| _position+=bytes.length; |
| } |
| |
| /** |
| * Retruns the byte buffer that is wrapping the backing array of this codec. |
| * |
| * @return the byte buffer that is wrapping the backing array of this codec. |
| */ |
| public ByteBuffer getEncodedBuffer () |
| { |
| return ByteBuffer.wrap(_buffer,0,_position); |
| } |
| } |