/*
 * 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 javax.jdo;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

/**
 * 
 * <p>
 */
public class PMFProxy implements InvocationHandler {

    private String connectionDriverName;

    public static PersistenceManagerFactory newInstance() {
        PersistenceManagerFactory pmf =
               (PersistenceManagerFactory) Proxy.newProxyInstance(
                PMFProxy.class.getClassLoader(),
                new Class[]{PersistenceManagerFactory.class},
                new PMFProxy());
        return pmf;
    }

    /*
     *
     */
    public Object invoke(Object proxy, Method m, Object[] args)
            throws Exception {
        Object result = null;

        if (m.getName().equals("getConnectionDriverName")) {
            result = connectionDriverName;
        } else if (m.getName().equals("setConnectionDriverName")) {
            connectionDriverName = (String) args[0];
        } else {
            throw new Exception(
                    "Unexpected invocation of method: " + m);
        }
        return result;
    }
}