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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.messaging;
import org.apache.qpid.amqp_1_0.codec.ValueWriter;
import org.apache.qpid.amqp_1_0.type.Binary;
import org.apache.qpid.amqp_1_0.type.codec.AMQPDescribedTypeRegistry;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;
public class SectionEncoderImpl implements SectionEncoder
{
private static final ByteBuffer EMPTY_BYTE_BUFFER = ByteBuffer.wrap(new byte[0]);
private ValueWriter.Registry _registry;
private int _totalSize = 0;
private List<byte[]> _output = new ArrayList<byte[]>();
private static final int DEFAULT_BUFFER_SIZE = 64 * 1024;
private ByteBuffer _current;
public SectionEncoderImpl(final AMQPDescribedTypeRegistry describedTypeRegistry)
{
_registry = describedTypeRegistry;
reset();
}
public void reset()
{
_totalSize = 0;
_output.clear();
_current = null;
}
public Binary getEncoding()
{
byte[] data = new byte[_totalSize];
int offset = 0;
for(byte[] src : _output)
{
int length = src.length;
System.arraycopy(src, 0, data, offset, _totalSize - offset < length ? _totalSize - offset : length);
offset+= length;
}
return new Binary(data);
}
public void encodeObject(Object obj)
{
final ValueWriter<Object> valueWriter = _registry.getValueWriter(obj);
valueWriter.setValue(obj);
int size = valueWriter.writeToBuffer(EMPTY_BYTE_BUFFER);
byte[] data = new byte[size];
_current = ByteBuffer.wrap(data);
valueWriter.writeToBuffer(_current);
_output.add(data);
_totalSize += size;
}
public void encodeRaw(byte[] data)
{
if(_current == null)
{
byte[] buf = new byte[data.length];
_current = ByteBuffer.wrap(buf);
_output.add(buf);
}
int remaining = _current.remaining();
int length = data.length;
if(remaining < length)
{
_current.put(data,0,remaining);
byte[] dst = new byte[length-remaining];
_output.add(dst);
_current = ByteBuffer.wrap(dst).put(data,remaining,length-remaining);
}
else
{
_current.put(data);
}
_totalSize += data.length;
}
}
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