/*
*
* 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.store.berkeleydb.tuple;
import java.nio.ByteBuffer;
import com.sleepycat.bind.tuple.TupleBinding;
import com.sleepycat.bind.tuple.TupleInput;
import com.sleepycat.bind.tuple.TupleOutput;
import org.apache.qpid.server.plugin.MessageMetaDataType;
import org.apache.qpid.server.store.MessageMetaDataTypeRegistry;
import org.apache.qpid.server.store.StorableMessageMetaData;
/**
* Handles the mapping to and from message meta data
*/
public class MessageMetaDataBinding extends TupleBinding<StorableMessageMetaData>
{
private static final MessageMetaDataBinding INSTANCE = new MessageMetaDataBinding();
public static MessageMetaDataBinding getInstance()
{
return INSTANCE;
}
/** private constructor forces getInstance instead */
private MessageMetaDataBinding() { }
@Override
public StorableMessageMetaData entryToObject(TupleInput tupleInput)
{
final int bodySize = tupleInput.readInt();
byte[] dataAsBytes = new byte[bodySize];
tupleInput.readFast(dataAsBytes);
ByteBuffer buf = ByteBuffer.wrap(dataAsBytes);
buf.position(1);
buf = buf.slice();
MessageMetaDataType type = MessageMetaDataTypeRegistry.fromOrdinal(dataAsBytes[0]);
return type.createMetaData(buf);
}
@Override
public void objectToEntry(StorableMessageMetaData metaData, TupleOutput tupleOutput)
{
final int bodySize = 1 + metaData.getStorableSize();
byte[] underlying = new byte[bodySize];
underlying[0] = (byte) metaData.getType().ordinal();
ByteBuffer buf = ByteBuffer.wrap(underlying);
buf.position(1);
buf = buf.slice();
metaData.writeToBuffer(0, buf);
tupleOutput.writeInt(bodySize);
tupleOutput.writeFast(underlying);
}
}