| /* |
| * |
| * 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]; |
| } |
| |
| } |