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
015package org.apache.tapestry.bean;
016
017import org.apache.hivemind.ApplicationRuntimeException;
018import org.apache.hivemind.impl.BaseLocatable;
019import org.apache.hivemind.util.Defense;
020import org.apache.hivemind.util.PropertyUtils;
021import 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 */
030public 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}