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 015package org.apache.tapestry5.corelib.mixins; 016 017import org.apache.tapestry5.annotations.InjectContainer; 018import org.apache.tapestry5.annotations.AfterRender; 019import 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 */ 033public class RenderClientId 034{ 035 @InjectContainer 036 private ClientElement element; 037 038 @AfterRender 039 void ensureId() 040 { 041 element.getClientId(); 042 } 043}