001    /*
002     * Copyright 2005 [ini4j] Development Team
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 java.beans.*;
019    import java.lang.reflect.*;
020    import java.util.prefs.*;
021    import java.util.*;
022    
023    public class PreferencesBean
024    {
025        public static <T> T newInstance(Class<T> clazz, final Preferences prefs)
026        {
027            return clazz.cast(Proxy.newProxyInstance(clazz.getClassLoader(), new Class[] {clazz}, new AbstractBeanInvocationHandler()
028            {
029                protected Object getPropertySpi(String property, Class<?> clazz)
030                {
031                    return prefs.get(property,null);
032                }
033            
034                protected void setPropertySpi(String property, Object value, Class<?> clazz)
035                {
036                    prefs.put(property, value.toString());
037                }
038                
039                protected boolean hasPropertySpi(String property)
040                {
041                    return prefs.get(property, null) != null;
042                }
043            }
044            ));
045        }
046    }