001    //  Copyright 2008 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.tapestry5.internal.util;
016    
017    import org.apache.tapestry5.Block;
018    import org.apache.tapestry5.MarkupWriter;
019    import org.apache.tapestry5.Renderable;
020    import org.apache.tapestry5.runtime.RenderCommand;
021    import org.apache.tapestry5.runtime.RenderQueue;
022    
023    /**
024     * Allows any {@link org.apache.tapestry5.Renderable} object to act as a {@link org.apache.tapestry5.Block}. Basically,
025     * dressed up the Renderable with the Block interface, and delegates the {@link org.apache.tapestry5.Renderable}
026     * interface to the underlying renderable object.
027     */
028    public class RenderableAsBlock implements Block, RenderCommand
029    {
030        private final Renderable renderable;
031    
032        public RenderableAsBlock(Renderable renderable)
033        {
034            this.renderable = renderable;
035        }
036    
037        /**
038         * Invokes {@link Renderable#render(org.apache.tapestry5.MarkupWriter)}.
039         */
040        public void render(MarkupWriter writer, RenderQueue queue)
041        {
042            renderable.render(writer);
043        }
044    
045        @Override
046        public String toString()
047        {
048            return String.format("Block[%s]", renderable);
049        }
050    }