java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/tuples/MessageMetaDataTB_5.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67

/*
 *
 * 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.tuples;

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 MessageMetaDataTB_5 extends MessageMetaDataTB_4
{

    @Override
    public Object entryToObject(TupleInput tupleInput)
    {
        final int bodySize = tupleInput.readInt();
        byte[] dataAsBytes = new byte[bodySize];
        tupleInput.readFast(dataAsBytes);

        java.nio.ByteBuffer buf = java.nio.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(Object object, TupleOutput tupleOutput)
    {
        StorableMessageMetaData metaData = (StorableMessageMetaData) object;

        final int bodySize = 1 + metaData.getStorableSize();
        byte[] underlying = new byte[bodySize];
        underlying[0] = (byte) metaData.getType().ordinal();
        java.nio.ByteBuffer buf = java.nio.ByteBuffer.wrap(underlying);
        buf.position(1);
        buf = buf.slice();

        metaData.writeToBuffer(0, buf);
        tupleOutput.writeInt(bodySize);
        tupleOutput.writeFast(underlying);
    }
}