001    // Copyright 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.bean;
016    
017    import org.apache.hivemind.ApplicationRuntimeException;
018    import org.apache.hivemind.impl.BaseLocatable;
019    import org.apache.hivemind.util.Defense;
020    import org.apache.hivemind.util.PropertyUtils;
021    import org.apache.tapestry.IBeanProvider;
022    
023    /**
024     * Performs "lightweight" initialization of a bean; this is based on a term (and code) from
025     * HiveMind, where the settings for a bean's properties are expressed as a single string.
026     * 
027     * @author Howard M. Lewis Ship
028     * @since 4.0
029     */
030    public class LightweightBeanInitializer extends BaseLocatable implements IBeanInitializer
031    {
032        private final String _initializer;
033    
034        public LightweightBeanInitializer(String initializer)
035        {
036            Defense.notNull(initializer, "initializer");
037    
038            _initializer = initializer;
039        }
040    
041        public void setBeanProperty(IBeanProvider provider, Object bean)
042        {
043            try
044            {
045                PropertyUtils.configureProperties(bean, _initializer);
046            }
047            catch (Exception ex)
048            {
049                throw new ApplicationRuntimeException(ex.getMessage(), getLocation(), ex);
050            }
051        }
052    
053        /**
054         * Returns the initializer itself, rather than any single property name.
055         */
056        public String getPropertyName()
057        {
058            return _initializer;
059        }
060    
061    }