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1
64
65
70 package com.jcorporate.expresso.ext.taglib;
71
72 import com.jcorporate.expresso.core.controller.ControllerElement;
73
74 import javax.servlet.jsp.JspException  ;
75 import javax.servlet.jsp.JspTagException ;
76 import javax.servlet.jsp.tagext.IterationTag ;
77 import java.util.Enumeration ;
78
79
80
83 public class ElementIterator
84 extends ExpressoBodyTagSupport {
85 protected ControllerElement oneElement = null;
86 protected Enumeration elements = null;
87
88 public ElementIterator() {
89 super();
90 }
91
92 public int doAfterBody()
93 throws JspException {
94 if (elements.hasMoreElements()) {
95 oneElement = (ControllerElement) elements.nextElement();
96
97 return IterationTag.EVAL_BODY_AGAIN;
99 } else {
100 return SKIP_BODY;
101 }
102 }
103
104 public int doEndTag()
105 throws JspTagException {
106 try {
107 if (bodyContent != null) {
108 bodyContent.writeOut(bodyContent.getEnclosingWriter());
109 }
110 } catch (java.io.IOException e) {
111 throw new JspTagException ("IO Error: " + e.getMessage());
112 }
113
114 return EVAL_PAGE;
115 }
116
117 public void doInitBody()
118 throws JspException {
119 oneElement = (ControllerElement) elements.nextElement();
120 }
121
122 public int doStartTag()
123 throws javax.servlet.jsp.JspTagException {
124 try {
125 ElementCollection ancestorCollection = (ElementCollection) getAncestor(
126 "com.jcorporate.expresso.ext.taglib.ElementCollection");
127
128 if (ancestorCollection == null) {
129 throw new JspTagException ("ElementIterator Tag can only be used nested in a ElementCollection tag");
130 }
131
132 elements = ancestorCollection.getElements();
133 } catch (Exception e) {
134 throw new JspTagException ("ElementIterator Tag Error: " +
135 e.getMessage());
136 }
137 if (elements == null || !elements.hasMoreElements()) {
138 return SKIP_BODY;
139 } else {
140 return IterationTag.EVAL_BODY_AGAIN;
142 }
143 }
144
145 public ControllerElement getElement() {
146 return oneElement;
147 }
148 }
149 |
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