proton-j/src/main/java/org/apache/qpid/proton/codec/impl/UUIDElement.java

/*
 *
 * 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.proton.codec.impl;

import java.nio.ByteBuffer;
import java.util.UUID;

import org.apache.qpid.proton.codec.Data;

class UUIDElement extends AtomicElement<UUID>
{

    private final UUID _value;

    UUIDElement(Element parent, Element prev, UUID u)
    {
        super(parent, prev);
        _value = u;
    }

    @Override
    public int size()
    {
        return isElementOfArray() ? 16 : 17;
    }

    @Override
    public UUID getValue()
    {
        return _value;
    }

    @Override
    public Data.DataType getDataType()
    {
        return Data.DataType.UUID;
    }

    @Override
    public int encode(ByteBuffer b)
    {
        int size = size();
        if(b.remaining()>=size)
        {
            if(size == 17)
            {
                b.put((byte)0x98);
            }
            b.putLong(_value.getMostSignificantBits());
            b.putLong(_value.getLeastSignificantBits());
            return size;
        }
        else
        {
            return 0;
        }
    }
}