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/*
*
* 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.amqp_1_0.codec;
import org.apache.qpid.amqp_1_0.type.*;
import org.apache.qpid.amqp_1_0.type.transport.*;
import org.apache.qpid.amqp_1_0.type.transport.Error;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Formatter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class CompoundTypeConstructor extends VariableWidthTypeConstructor
{
private final CompoundTypeAssembler.Factory _assemblerFactory;
public static final CompoundTypeAssembler.Factory LIST_ASSEMBLER_FACTORY =
new CompoundTypeAssembler.Factory()
{
public CompoundTypeAssembler newInstance()
{
return new ListAssembler();
}
};
private static class ListAssembler implements CompoundTypeAssembler
{
private List _list;
public void init(final int count) throws AmqpErrorException
{
_list = new ArrayList(count);
}
public void addItem(final Object obj) throws AmqpErrorException
{
_list.add(obj);
}
public Object complete() throws AmqpErrorException
{
return _list;
}
@Override
public String toString()
{
return "ListAssembler{" +
"_list=" + _list +
'}';
}
}
public static final CompoundTypeAssembler.Factory MAP_ASSEMBLER_FACTORY =
new CompoundTypeAssembler.Factory()
{
public CompoundTypeAssembler newInstance()
{
return new MapAssembler();
}
};
private static class MapAssembler implements CompoundTypeAssembler
{
private Map _map;
private Object _lastKey;
private static final Object NOT_A_KEY = new Object();
public void init(final int count) throws AmqpErrorException
{
// Can't have an odd number of elements in a map
if((count & 0x1) == 1)
{
Error error = new Error();
error.setCondition(AmqpError.DECODE_ERROR);
Formatter formatter = new Formatter();
formatter.format("map cannot have odd number of elements: %d", count);
error.setDescription(formatter.toString());
throw new AmqpErrorException(error);
}
_map = new HashMap(count);
_lastKey = NOT_A_KEY;
}
public void addItem(final Object obj) throws AmqpErrorException
{
if(_lastKey != NOT_A_KEY)
{
if(_map.put(_lastKey, obj) != null)
{
Error error = new Error();
error.setCondition(AmqpError.DECODE_ERROR);
Formatter formatter = new Formatter();
formatter.format("map cannot have duplicate keys: %s has values (%s, %s)", _lastKey, _map.get(_lastKey), obj);
error.setDescription(formatter.toString());
throw new AmqpErrorException(error);
}
_lastKey = NOT_A_KEY;
}
else
{
_lastKey = obj;
}
}
public Object complete() throws AmqpErrorException
{
return _map;
}
}
public static CompoundTypeConstructor getInstance(int i,
CompoundTypeAssembler.Factory assemblerFactory)
{
return new CompoundTypeConstructor(i, assemblerFactory);
}
private CompoundTypeConstructor(int size,
final CompoundTypeAssembler.Factory assemblerFactory)
{
super(size);
_assemblerFactory = assemblerFactory;
}
@Override
public Object construct(final ByteBuffer in, boolean isCopy, ValueHandler delegate) throws AmqpErrorException
{
int size;
int count;
if(getSize() == 1)
{
size = in.get() & 0xFF;
count = in.get() & 0xFF;
}
else
{
size = in.getInt();
count = in.getInt();
}
ByteBuffer data;
ByteBuffer inDup = in.slice();
inDup.limit(size-getSize());
CompoundTypeAssembler assembler = _assemblerFactory.newInstance();
assembler.init(count);
for(int i = 0; i < count; i++)
{
assembler.addItem(delegate.parse(in));
}
return assembler.complete();
}
}
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