001 /* 002 * Copyright 2005,2009 Ivan SZKIBA 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 package org.ini4j; 017 018 import org.ini4j.spi.AbstractBeanInvocationHandler; 019 020 import java.lang.reflect.Proxy; 021 022 import java.util.prefs.Preferences; 023 024 public final class PreferencesBean 025 { 026 private PreferencesBean() 027 { 028 } 029 030 public static <T> T newInstance(Class<T> clazz, final Preferences prefs) 031 { 032 return clazz.cast(Proxy.newProxyInstance(clazz.getClassLoader(), new Class[] { clazz }, new Handler(prefs))); 033 } 034 035 private static class Handler extends AbstractBeanInvocationHandler 036 { 037 private final Preferences _prefs; 038 039 public Handler(Preferences prefs) 040 { 041 _prefs = prefs; 042 } 043 044 @Override protected Object getPropertySpi(String property, Class<?> clazz) 045 { 046 return _prefs.get(property, null); 047 } 048 049 @Override protected void setPropertySpi(String property, Object value, Class<?> clazz) 050 { 051 _prefs.put(property, value.toString()); 052 } 053 054 @Override protected boolean hasPropertySpi(String property) 055 { 056 return _prefs.get(property, null) != null; 057 } 058 } 059 }