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.annotations.BeforeRenderBody;
018    import org.apache.tapestry5.annotations.MixinAfter;
019    
020    /**
021     * Discards a component's body. Returns false from the {@link BeforeRenderBody} phase, which prevents the rendering of
022     * the body. Set up as a "MixinAfter" so that components can render their an alternative body if they so desire before
023     * this mixin cancels the normal body (from the container's template).
024     * 
025     * @tapestrydoc
026     */
027    @MixinAfter
028    public class DiscardBody
029    {
030        boolean beforeRenderBody()
031        {
032            return false;
033        }
034    }