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.describe;
016    
017    import org.apache.hivemind.util.Defense;
018    import org.apache.tapestry.IMarkupWriter;
019    import org.apache.tapestry.IRender;
020    import org.apache.tapestry.IRequestCycle;
021    
022    /**
023     * Implements {@link IRender} for a particular object by delegating to a
024     * {@link org.apache.tapestry.describe.RenderStrategy}.
025     * 
026     * @author Howard M. Lewis Ship
027     * @since 4.0
028     */
029    public class RenderBridge implements IRender
030    {
031        private Object _object;
032    
033        private RenderStrategy _strategy;
034    
035        public RenderBridge(Object object, RenderStrategy strategy)
036        {
037            Defense.notNull(strategy, "strategy");
038    
039            _object = object;
040            _strategy = strategy;
041        }
042    
043        public void render(IMarkupWriter writer, IRequestCycle cycle)
044        {
045            _strategy.renderObject(_object, writer, cycle);
046        }
047    }