subset

Description

NOTE: JSP-TAG

A tag that takes an iterator and outputs a subset of it. It delegates to org.apache.struts2.util.SubsetIteratorFilter internally to perform the subset functionality.

Parameters

Name	Required	Evaluated	Type	Description
count	false	true	Integer	Indicate the number of entries to be in the resulting subset iterator
decider	false	true	org.apache.struts2.util.SubsetIteratorFilter.Decider	Extension to plug-in a decider to determine if that particular entry is to be included in the resulting subset iterator
source	false	true	String	Indicate the source of which the resulting subset iterator is to be derived base on
start	false	true	Integer	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

Examples

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>

Description

Parameters

Name

Required

Default

Evaluated

Type

Description

Examples