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21 package org.apache.struts.taglib.nested.html;
22
23 import org.apache.struts.taglib.html.ImgTag;
24 import org.apache.struts.taglib.nested.NestedNameSupport;
25 import org.apache.struts.taglib.nested.NestedPropertyHelper;
26
27 import javax.servlet.http.HttpServletRequest;
28 import javax.servlet.jsp.JspException;
29
30 /**
31 * NestedImgTag, renders the nested version of the <img> tag.
32 *
33 * @version $Rev: 471754 $
34 * @since Struts 1.1
35 */
36 public class NestedImgTag extends ImgTag implements NestedNameSupport {
37
38 private String originalName = null;
39 private String originalProperty = null;
40
41 /**
42 * Overriding method of the heart of the matter. Gets the relative
43 * property and leaves the rest up to the original tag implementation.
44 * Sweet.
45 *
46 * @return int JSP continuation directive. This is in the hands of the
47 * super class.
48 */
49 public int doStartTag() throws JspException {
50
51 originalName = getName();
52 originalProperty = getProperty();
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54
55 HttpServletRequest request =
56 (HttpServletRequest) pageContext.getRequest();
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59 NestedPropertyHelper.setNestedProperties(request, this);
60
61
62 return super.doStartTag();
63 }
64
65 /**
66 * Complete the processing of the tag. The nested tags here will restore
67 * all the original value for the tag itself and the nesting context.
68 *
69 * @return int to describe the next step for the JSP processor
70 * @throws JspException for the bad things JSP's do
71 */
72 public int doEndTag() throws JspException {
73
74 int i = super.doEndTag();
75
76
77 setName(originalName);
78 setProperty(originalProperty);
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81 return i;
82 }
83
84 /**
85 * Release the tag's resources and reset the values.
86 */
87 public void release() {
88 super.release();
89
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91 originalName = null;
92 originalProperty = null;
93 }
94 }