001// Copyright 2006, 2007, 2011 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.corelib.mixins;
016
017import org.apache.tapestry5.ComponentResources;
018import org.apache.tapestry5.MarkupWriter;
019import org.apache.tapestry5.annotations.AfterRenderTemplate;
020import org.apache.tapestry5.annotations.BeforeRenderTemplate;
021import org.apache.tapestry5.annotations.BeginRender;
022import org.apache.tapestry5.annotations.MixinAfter;
023import org.apache.tapestry5.annotations.SupportsInformalParameters;
024import org.apache.tapestry5.ioc.annotations.Inject;
025
026/**
027 * Used to render out all informal parameters, at the end of the {@link org.apache.tapestry5.annotations.BeginRender}
028 * phase.
029 * <p/>
030 * This mixin can be used with components that render a single tag inside the {@link BeginRender} phase. RenderInformals
031 * will activate during the PostBeginRender phase to write additional attributes, from the informal parameters, into the
032 * active element.
033 * <p/>
034 * If you want this behavior, but need to render more than a single tag, then implement render phase methods for the
035 * {@link BeforeRenderTemplate} and {@link AfterRenderTemplate} phases. Use those phases to write the additional
036 * elements and close them.
037 * <p/>
038 * This is often used as a base class, for cases where a component doesn't have other mixins.
039 * 
040 * @tapestrydoc
041 */
042@MixinAfter
043@SupportsInformalParameters
044public class RenderInformals
045{
046    @Inject
047    private ComponentResources resources;
048
049    void beginRender(MarkupWriter writer)
050    {
051        resources.renderInformalParameters(writer);
052    }
053}