001 // Copyright 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.InjectContainer; 018 import org.apache.tapestry5.annotations.AfterRender; 019 import org.apache.tapestry5.ClientElement; 020 021 /** 022 * Forces a client element to render its client id by ensuring that 023 * {@link org.apache.tapestry5.ClientElement#getClientId() ClientElement#getClientId()} 024 * is called. This is sometimes needed because, by design, most components (those that 025 * implement {@link ClientElement}) only render a client-side ID if their getClientId 026 * method is called sometime during the server-side DOM render. 027 * <p/> 028 * See the {@link org.apache.tapestry5.corelib.components.Any Any} component 029 * for an example of use. 030 * 031 * @tapestrydoc 032 */ 033 public class RenderClientId 034 { 035 @InjectContainer 036 private ClientElement element; 037 038 @AfterRender 039 void ensureId() 040 { 041 element.getClientId(); 042 } 043 }