QueuePosition.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.usergrid.mq;


import java.util.EnumSet;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;


public enum QueuePosition {
    START( "start" ), END( "end" ), LAST( "last" ), CONSUMER( "consumer" );

    private final String shortName;


    QueuePosition( String shortName ) {
        this.shortName = shortName;
    }


    static Map<String, QueuePosition> nameMap = new ConcurrentHashMap<String, QueuePosition>();


    static {
        for ( QueuePosition op : EnumSet.allOf( QueuePosition.class ) ) {
            if ( op.shortName != null ) {
                nameMap.put( op.shortName, op );
            }
        }
    }


    public static QueuePosition find( String s ) {
        if ( s == null ) {
            return null;
        }
        return nameMap.get( s.toLowerCase() );
    }


    @Override
    public String toString() {
        return shortName;
    }
}