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
015package org.apache.tapestry5.internal.util;
016
017import org.apache.tapestry5.Block;
018import org.apache.tapestry5.MarkupWriter;
019import org.apache.tapestry5.Renderable;
020import org.apache.tapestry5.runtime.RenderCommand;
021import 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 */
028public 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}