diff options
Diffstat (limited to 'java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/tuple/MessageMetaDataBinding.java')
-rw-r--r-- | java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/tuple/MessageMetaDataBinding.java | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/tuple/MessageMetaDataBinding.java b/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/tuple/MessageMetaDataBinding.java new file mode 100644 index 0000000000..2e6c8d5666 --- /dev/null +++ b/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/tuple/MessageMetaDataBinding.java @@ -0,0 +1,77 @@ +/* + * + * 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.store.MessageMetaDataType; +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 = MessageMetaDataType.values()[dataAsBytes[0]]; + StorableMessageMetaData metaData = type.getFactory().createMetaData(buf); + + return metaData; + } + + @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); + } +} |