001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019 020 package org.apache.myfaces.tobago.taglib.component; 021 022 /* 023 * Created on: 15.02.2002, 16:19:49 024 * $Id: TobagoBodyTag.java 1368577 2012-08-02 16:20:31Z lofwyr $ 025 */ 026 027 import org.apache.commons.logging.Log; 028 import org.apache.commons.logging.LogFactory; 029 030 import javax.faces.component.UIComponent; 031 import javax.servlet.jsp.JspException; 032 import javax.servlet.jsp.tagext.BodyContent; 033 import javax.servlet.jsp.tagext.BodyTag; 034 035 public abstract class TobagoBodyTag extends TobagoTag implements TobagoBodyTagDeclaration { 036 037 private static final Log LOG = LogFactory.getLog(TobagoBodyTag.class); 038 039 private BodyContent bodyContent; 040 041 public int doAfterBody() throws JspException { 042 return getDoAfterBodyValue(); 043 } 044 045 public void doInitBody() throws JspException { 046 } 047 048 049 public int doEndTag() throws JspException { 050 if (LOG.isWarnEnabled()) { 051 UIComponent component = getComponentInstance(); 052 if (component != null && component.getRendersChildren() && !isBodyContentEmpty()) { 053 LOG.warn("BodyContent should be empty. Component with id " + component.getId() 054 + " class " + component.getClass().getName() + " content " + bodyContent.getString() 055 + " Please use the f:verbatim tag for nested content!"); 056 } 057 } 058 return super.doEndTag(); 059 } 060 061 protected boolean isBodyContentEmpty() { 062 if (bodyContent != null) { 063 String content = bodyContent.getString(); 064 //bodyContent.clearBody(); 065 String tmp = content.replace('\n', ' '); 066 if (tmp.trim().length() > 0) { // if there are only whitespaces: drop bodyContent 067 return false; 068 } 069 } 070 return true; 071 } 072 073 protected int getDoStartValue() throws JspException { 074 return BodyTag.EVAL_BODY_BUFFERED; 075 } 076 077 protected int getDoAfterBodyValue() throws JspException { 078 return BodyTag.SKIP_BODY; 079 } 080 081 public void release() { 082 super.release(); 083 bodyContent = null; 084 } 085 086 public void setBodyContent(BodyContent bodyContent) { 087 this.bodyContent = bodyContent; 088 } 089 } 090