org.apache.struts2.views.jsp.iterator
Class SubsetIteratorTag
java.lang.Object
javax.servlet.jsp.tagext.TagSupport
javax.servlet.jsp.tagext.BodyTagSupport
org.apache.struts2.views.jsp.StrutsBodyTagSupport
org.apache.struts2.views.jsp.iterator.SubsetIteratorTag
- All Implemented Interfaces:
- Serializable, BodyTag, IterationTag, JspTag, Tag
public class SubsetIteratorTag
- extends StrutsBodyTagSupport
NOTE: JSP-TAG
A tag that takes an iterator and outputs a subset of it. It delegates to
SubsetIteratorFilter
internally to
perform the subset functionality.
- count (Object) - Indicate the number of entries to be in the resulting subset iterator
- source* (Object) - Indicate the source of which the resulting subset iterator is to be derived base on
- start (Object) - Indicate the starting index (eg. first entry is 0) of entries in the source to be available as the first entry in the resulting subset iterator
- decider (Object) - Extension to plug-in a decider to determine if that particular entry is to be included in the resulting subset iterator
- var (String) - Indicate the pageContext attribute name to store the resultant subset iterator in
public class MySubsetTagAction extends ActionSupport {
public String execute() throws Exception {
l = new ArrayList();
l.add(new Integer(1));
l.add(new Integer(2));
l.add(new Integer(3));
l.add(new Integer(4));
l.add(new Integer(5));
return "done";
}
public Integer[] getMyArray() {
return a;
}
public List getMyList() {
return l;
}
public Decider getMyDecider() {
return new Decider() {
public boolean decide(Object element) throws Exception {
int i = ((Integer)element).intValue();
return (((i % 2) == 0)?true:false);
}
};
}
}
<!-- s: List basic -->
<s:subset source="myList">
<s:iterator>
<s:property />
</s:iterator>
</s:subset>
<!-- B: List with count -->
<s:subset source="myList" count="3">
<s:iterator>
<s:property />
</s:iterator>
</s:subset>
<!-- C: List with start -->
<s:subset source="myList" count="13" start="3">
<s:iterator>
<s:property />
</s:iterator>
</s:subset>
<!-- D: List with var -->
<s:subset var="mySubset" source="myList" count="13" start="3" />
<%
Iterator i = (Iterator) pageContext.getAttribute("mySubset");
while(i.hasNext()) {
%>
<%=i.next() %>
<% } %>
<!-- D: List with Decider -->
<s:subset source="myList" decider="myDecider">
<s:iterator>
<s:property />
</s:iterator>
</s:subset>
- See Also:
- Serialized Form
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
serialVersionUID
private static final long serialVersionUID
- See Also:
- Constant Field Values
LOG
private static final Logger LOG
countAttr
String countAttr
sourceAttr
String sourceAttr
startAttr
String startAttr
deciderAttr
String deciderAttr
var
String var
subsetIteratorFilter
SubsetIteratorFilter subsetIteratorFilter
SubsetIteratorTag
public SubsetIteratorTag()
setCount
public void setCount(String count)
setSource
public void setSource(String source)
setStart
public void setStart(String start)
setDecider
public void setDecider(String decider)
setId
public void setId(String string)
- Overrides:
setId
in class TagSupport
setVar
public void setVar(String var)
doStartTag
public int doStartTag()
throws JspException
- Specified by:
doStartTag
in interface Tag
- Overrides:
doStartTag
in class BodyTagSupport
- Throws:
JspException
doEndTag
public int doEndTag()
throws JspException
- Specified by:
doEndTag
in interface Tag
- Overrides:
doEndTag
in class BodyTagSupport
- Throws:
JspException
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