jpa-container/src/main/java/org/apache/aries/jpa/container/weaving/impl/TransformerRegistrySingleton.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 WARRANTIESOR 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.aries.jpa.container.weaving.impl;


/**
 * This class is used to get hold of the active {@link TransformerRegistry} for this bundle.
 */
public class TransformerRegistrySingleton {
    private static TransformerRegistry instance;
    
    private TransformerRegistrySingleton() {
    }

    public static TransformerRegistry get() {
        if (instance == null) {
            instance = new JPAWeavingHook();
        }
        return instance;
    }
}