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, javax.servlet.jsp.tagext.BodyTag, javax.servlet.jsp.tagext.IterationTag, javax.servlet.jsp.tagext.JspTag, javax.servlet.jsp.tagext.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

Field Summary

Fields inherited from class javax.servlet.jsp.tagext.BodyTagSupport

bodyContent

Fields inherited from class javax.servlet.jsp.tagext.TagSupport

id, pageContext

Fields inherited from interface javax.servlet.jsp.tagext.BodyTag

EVAL_BODY_BUFFERED, EVAL_BODY_TAG

Fields inherited from interface javax.servlet.jsp.tagext.IterationTag

EVAL_BODY_AGAIN

Fields inherited from interface javax.servlet.jsp.tagext.Tag

EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE

Constructor Summary

SubsetIteratorTag()

Method Summary

int	doEndTag()
int	doStartTag()
void	setCount(String count)
void	setDecider(String decider)
void	setId(String string)
void	setSource(String source)
void	setStart(String start)
void	setVar(String var)

Methods inherited from class org.apache.struts2.views.jsp.StrutsBodyTagSupport

findString, findValue, findValue, getBody, getStack, toString

Methods inherited from class javax.servlet.jsp.tagext.BodyTagSupport

doAfterBody, doInitBody, getBodyContent, getPreviousOut, release, setBodyContent

Methods inherited from class javax.servlet.jsp.tagext.TagSupport

findAncestorWithClass, getId, getParent, getValue, getValues, removeValue, setPageContext, setParent, setValue

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface javax.servlet.jsp.tagext.Tag

getParent, setPageContext, setParent

Constructor Detail

SubsetIteratorTag

public SubsetIteratorTag()

Method Detail

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 javax.servlet.jsp.tagext.TagSupport

setVar

public void setVar(String var)

doStartTag

public int doStartTag()
               throws javax.servlet.jsp.JspException

Specified by:

doStartTag in interface javax.servlet.jsp.tagext.Tag

Overrides:

doStartTag in class javax.servlet.jsp.tagext.BodyTagSupport

Throws:

javax.servlet.jsp.JspException

doEndTag

public int doEndTag()
             throws javax.servlet.jsp.JspException

Specified by:

doEndTag in interface javax.servlet.jsp.tagext.Tag

Overrides:

doEndTag in class javax.servlet.jsp.tagext.BodyTagSupport

Throws:

javax.servlet.jsp.JspException