    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
    015    package org.apache.tapestry5.corelib.mixins;
    016
    017    import org.apache.tapestry5.ComponentResources;
    018    import org.apache.tapestry5.MarkupWriter;
    019    import org.apache.tapestry5.annotations.AfterRenderTemplate;
    020    import org.apache.tapestry5.annotations.BeforeRenderTemplate;
    021    import org.apache.tapestry5.annotations.BeginRender;
    022    import org.apache.tapestry5.annotations.MixinAfter;
    023    import org.apache.tapestry5.annotations.SupportsInformalParameters;
    024    import 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
    044    public class RenderInformals
    045    {
    046        @Inject
    047        private ComponentResources resources;
    048
    049        void beginRender(MarkupWriter writer)
    050        {
    051            resources.renderInformalParameters(writer);
    052        }
    053    }