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1
26
27 package org.nextime.ion.frontoffice.taglib;
28
29 import java.io.IOException  ;
30 import java.util.Collection ;
31 import java.util.Iterator ;
32
33 import javax.servlet.jsp.JspException ;
34 import javax.servlet.jsp.JspTagException ;
35 import javax.servlet.jsp.JspWriter ;
36 import javax.servlet.jsp.tagext.BodyContent ;
37 import javax.servlet.jsp.tagext.BodyTagSupport ;
38 import javax.servlet.jsp.tagext.Tag ;
39
40 public class IterateOverTag extends BodyTagSupport {
41
42 private String _var;
43 private Collection _collection;
44 private Iterator _iterator;
45 private IterateStatus _status;
46
47 public IterateOverTag() {
48 super();
49 init();
50 }
51
52 public void setVar(String var) {
53 _var = var;
54 }
55
56 public int doStartTag() throws JspException {
57
58 Tag t = findAncestorWithClass(this, SelectObjectsTag.class);
59 if (t == null)
60 throw new JspTagException ("Le tag iterateOver doit etre dans un tag selectObjects");
61
62 _collection = ((SelectObjectsTag) t).getCollection();
63
64 if (_collection == null)
65 return (SKIP_BODY);
66
67 _status = new IterateStatus();
68 _status._size = _collection.size();
69 _status._index = 0;
70
71 _iterator = _collection.iterator();
72
73 if (_iterator.hasNext()) {
74 Object element = _iterator.next();
75 if (element == null)
76 pageContext.removeAttribute(_var);
77 else
78 pageContext.setAttribute(_var, element);
79 _status._index++;
80 pageContext.setAttribute("iterateStatus", _status);
81 return (EVAL_BODY_TAG);
82 } else
83 return (SKIP_BODY);
84 }
85
86 public int doAfterBody() throws JspException {
87
88 if (bodyContent != null) {
89 JspWriter writer = pageContext.getOut();
90 if (writer instanceof BodyContent )
91 writer = ((BodyContent ) writer).getEnclosingWriter();
92 try {
93 writer.print(bodyContent.getString());
94 } catch (IOException e) {
95 throw new JspException (e);
96 }
97 bodyContent.clearBody();
98 }
99
100 if (_iterator.hasNext()) {
101 Object element = _iterator.next();
102 if (element == null)
103 pageContext.removeAttribute(_var);
104 else
105 pageContext.setAttribute(_var, element);
106 _status._index++;
107 pageContext.setAttribute("iterateStatus", _status);
108 return (EVAL_BODY_TAG);
109 } else
110 return (SKIP_BODY);
111
112 }
113
114 public int doEndTag() throws JspException {
115 return (EVAL_PAGE);
116 }
117
118 public void release() {
119 super.release();
120 init();
121 }
122
123 private void init() {
124 _var = null;
125 _status = null;
126 }
127
128 } |
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