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1
64
65 package com.jcorporate.expresso.ext.taglib;
66
67 import javax.servlet.jsp.JspException  ;
68 import javax.servlet.jsp.JspTagException ;
69 import javax.servlet.jsp.JspWriter ;
70 import javax.servlet.jsp.tagext.TagSupport ;
71
72
73
92 public class ContentTag
93 extends TagSupport {
94 private String content = null;
95
96 public ContentTag() {
97 super();
98 }
99
100 public int doStartTag() throws javax.servlet.jsp.JspException {
101 content = null;
102 return EVAL_BODY_INCLUDE;
103 }
104
105
106
111 public int doEndTag()
112 throws javax.servlet.jsp.JspTagException {
113 try {
114
115 OutputTag ancestorOutput = (OutputTag) getAncestor("com.jcorporate.expresso.ext.taglib.OutputTag");
117
118 if (ancestorOutput == null) {
119 throw new JspTagException ("A ContentTag must be nested within a valid OutputTag.");
120 }
121
122 content = ancestorOutput.getContent();
123
124 JspWriter writer = pageContext.getOut();
125 writer.print(content);
126 } catch (Exception e) {
127 throw new JspTagException ("ContentTag Error: " + e.getMessage());
128 }
129
130 return EVAL_PAGE;
131 }
132
133
134 private TagSupport getAncestor(String className)
137 throws JspException {
138 Class klass = null;
140 try {
141 klass = Class.forName(className);
142 } catch (ClassNotFoundException ex) {
143 throw new JspException (ex.getMessage());
144 }
145
146 return (TagSupport ) findAncestorWithClass(this, klass);
147 }
148 } |
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