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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.server.store;
import org.apache.qpid.server.plugin.MessageMetaDataType;
import org.apache.qpid.server.plugin.QpidServiceLoader;
public class MessageMetaDataTypeRegistry
{
private static MessageMetaDataType[] values;
static
{
int maxOrdinal = -1;
Iterable<MessageMetaDataType> messageMetaDataTypes =
new QpidServiceLoader().atLeastOneInstanceOf(MessageMetaDataType.class);
for(MessageMetaDataType type : messageMetaDataTypes)
{
if(type.ordinal()>maxOrdinal)
{
maxOrdinal = type.ordinal();
}
}
values = new MessageMetaDataType[maxOrdinal+1];
for(MessageMetaDataType type : new QpidServiceLoader().instancesOf(MessageMetaDataType.class))
{
if(values[type.ordinal()] != null)
{
throw new IllegalStateException("Multiple MessageDataType ("
+values[type.ordinal()].getClass().getName()
+", "
+ type.getClass().getName()
+ ") defined for the same ordinal value: " + type.ordinal());
}
values[type.ordinal()] = type;
}
}
public static MessageMetaDataType fromOrdinal(int ordinal)
{
return values[ordinal];
}
}
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