| /* |
| * 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.server.protocol.v1_0.codec; |
| |
| import org.apache.qpid.server.protocol.v1_0.type.AmqpErrorException; |
| import org.apache.qpid.server.protocol.v1_0.type.transport.AmqpError; |
| import org.apache.qpid.bytebuffer.QpidByteBuffer; |
| |
| import java.lang.reflect.Array; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public abstract class ArrayTypeConstructor implements TypeConstructor<Object[]> |
| { |
| |
| |
| |
| public Object[] construct(final QpidByteBuffer in, final ValueHandler handler) throws AmqpErrorException |
| { |
| int size = read(in); |
| if(in.remaining() < size) |
| { |
| throw new AmqpErrorException(AmqpError.DECODE_ERROR, |
| "Insufficient data to decode array - requires %d octects, only %d remaining.", |
| size, in.remaining()); |
| } |
| QpidByteBuffer dup = in.slice(); |
| |
| List rval; |
| try |
| { |
| dup.limit(size); |
| in.position(in.position()+size); |
| int count = read(dup); |
| TypeConstructor t = handler.readConstructor(dup); |
| rval = new ArrayList(count); |
| for(int i = 0; i < count; i++) |
| { |
| rval.add(t.construct(dup, handler)); |
| } |
| if(dup.hasRemaining()) |
| { |
| throw new AmqpErrorException(AmqpError.DECODE_ERROR, |
| "Array incorrectly encoded, %d bytes remaining after decoding %d elements", |
| dup.remaining(), count); |
| } |
| } |
| finally |
| { |
| dup.dispose(); |
| } |
| if(rval.size() == 0) |
| { |
| return null; |
| } |
| else |
| { |
| |
| |
| return rval.toArray((Object[])Array.newInstance(rval.get(0).getClass(), rval.size())); |
| } |
| } |
| |
| |
| abstract int read(QpidByteBuffer in) throws AmqpErrorException; |
| |
| |
| private static final ArrayTypeConstructor ONE_BYTE_SIZE_ARRAY = new ArrayTypeConstructor() |
| { |
| |
| @Override int read(final QpidByteBuffer in) throws AmqpErrorException |
| { |
| if(!in.hasRemaining()) |
| { |
| throw new AmqpErrorException(AmqpError.DECODE_ERROR, "Insufficient data to decode array"); |
| } |
| return ((int)in.get()) & 0xff; |
| } |
| |
| }; |
| |
| private static final ArrayTypeConstructor FOUR_BYTE_SIZE_ARRAY = new ArrayTypeConstructor() |
| { |
| |
| @Override int read(final QpidByteBuffer in) throws AmqpErrorException |
| { |
| if(in.remaining()<4) |
| { |
| throw new AmqpErrorException(AmqpError.DECODE_ERROR, "Insufficient data to decode array"); |
| } |
| return in.getInt(); |
| } |
| |
| }; |
| |
| public static ArrayTypeConstructor getOneByteSizeTypeConstructor() |
| { |
| return ONE_BYTE_SIZE_ARRAY; |
| } |
| |
| public static ArrayTypeConstructor getFourByteSizeTypeConstructor() |
| { |
| return FOUR_BYTE_SIZE_ARRAY; |
| } |
| |
| } |