| /* |
| * |
| * 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.qmf; |
| |
| import org.apache.qpid.transport.codec.BBDecoder; |
| |
| import java.nio.ByteBuffer; |
| |
| public class QMFCommandDecoder |
| { |
| private BBDecoder _decoder; |
| |
| |
| private static final QMFOperation[] OP_CODES = new QMFOperation[256]; |
| private final QMFService _qmfService; |
| |
| static |
| { |
| for(QMFOperation op : QMFOperation.values()) |
| { |
| OP_CODES[op.getOpcode()] = op; |
| } |
| } |
| |
| public QMFCommandDecoder(final QMFService qmfService, ByteBuffer buf) |
| { |
| _qmfService = qmfService; |
| _decoder = new BBDecoder(); |
| _decoder.init(buf); |
| } |
| |
| public QMFCommand decode() |
| { |
| if(_decoder.hasRemaining()) |
| { |
| QMFCommandHeader header = readQMFHeader(); |
| |
| switch(header.getOperation()) |
| { |
| case BROKER_REQUEST: |
| return new QMFBrokerRequestCommand(header, _decoder); |
| case PACKAGE_QUERY: |
| return new QMFPackageQueryCommand(header, _decoder); |
| case CLASS_QUERY: |
| return new QMFClassQueryCommand(header, _decoder); |
| case SCHEMA_REQUEST: |
| return new QMFSchemaRequestCommand(header, _decoder); |
| case METHOD_REQUEST: |
| return new QMFMethodRequestCommand(header, _decoder, _qmfService); |
| case GET_QUERY: |
| return new QMFGetQueryCommand(header, _decoder); |
| default: |
| System.out.println("Unknown command"); |
| |
| } |
| |
| return null; |
| } |
| else |
| { |
| return null; |
| } |
| } |
| |
| private QMFCommandHeader readQMFHeader() |
| { |
| if(_decoder.readInt8() == (byte) 'A' |
| && _decoder.readInt8() == (byte) 'M') |
| { |
| byte version = _decoder.readInt8(); |
| short opCode = _decoder.readUint8(); |
| int seq = _decoder.readInt32(); |
| |
| return new QMFCommandHeader(version, seq, OP_CODES[opCode]); |
| |
| } |
| return null; |
| } |
| } |