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NOTE: JSP-TAG
A tag that takes an iterator and outputs a subset of it. It delegates to
{@link org.apache.struts2.util.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
- id (String) - Indicate the pageContext attribute id 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 id -->
<s:subset id="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>
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