1/* 2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25package com.sun.beans.finder; 26 27import java.beans.PersistenceDelegate; 28import java.util.HashMap; 29import java.util.Map; 30 31/** 32 * This is utility class that provides functionality 33 * to find a {@link PersistenceDelegate} for a JavaBean specified by its type. 34 * 35 * @since 1.7 36 * 37 * @author Sergey A. Malenkov 38 */ 39public final class PersistenceDelegateFinder 40 extends InstanceFinder<PersistenceDelegate> { 41 42 private final Map<Class<?>, PersistenceDelegate> registry; 43 44 public PersistenceDelegateFinder() { 45 super(PersistenceDelegate.class, true, "PersistenceDelegate"); 46 this.registry = new HashMap<Class<?>, PersistenceDelegate>(); 47 } 48 49 public void register(Class<?> type, PersistenceDelegate delegate) { 50 synchronized (this.registry) { 51 if (delegate != null) { 52 this.registry.put(type, delegate); 53 } 54 else { 55 this.registry.remove(type); 56 } 57 } 58 } 59 60 @Override 61 public PersistenceDelegate find(Class<?> type) { 62 PersistenceDelegate delegate; 63 synchronized (this.registry) { 64 delegate = this.registry.get(type); 65 } 66 return (delegate != null) ? delegate : super.find(type); 67 } 68} 69