/*

 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package com.sun.beans.finder;

import java.beans.PersistenceDelegate;

import java.util.HashMap;

import java.util.Map;

/**

 * This is utility class that provides functionality

 * to find a {@link PersistenceDelegate} for a JavaBean specified by its type.

 *

 * @since 1.7

 *

 * @author Sergey A. Malenkov

 */

public final class PersistenceDelegateFinder

        extends InstanceFinder<PersistenceDelegate> {

    private final Map<Class<?>, PersistenceDelegate> registry;

    public PersistenceDelegateFinder() {

        super(PersistenceDelegate.class, true, "PersistenceDelegate");

        this.registry = new HashMap<Class<?>, PersistenceDelegate>();

    }

    public void register(Class<?> type, PersistenceDelegate delegate) {

        synchronized (this.registry) {

            if (delegate != null) {

                this.registry.put(type, delegate);

            }

            else {

                this.registry.remove(type);

            }

        }

    }

    @Override

    public PersistenceDelegate find(Class<?> type) {

        PersistenceDelegate delegate;

        synchronized (this.registry) {

            delegate = this.registry.get(type);

        }

        return (delegate != null) ? delegate : super.find(type);

    }

}