generator

Description

NOTE: JSP-TAG

Generate an iterator based on the val attribute supplied.

NOTE: The generated iterator will ALWAYS be pushed into the top of the stack, and poped at the end of the tag.

Parameters

Name	Required	Evaluated	Type	Description
Dynamic Attributes Allowed: false

converter	false	false	org.apache.struts2.util.IteratorGenerator.Converter	The converter to convert the String entry parsed from val into an object
count	false	false	Integer	The max number entries to be in the iterator
id	false	false	String	Deprecated. Use 'var' instead
separator	true	false	String	The separator to be used in separating the val into entries of the iterator
val	true	false	String	The source to be parsed into an iterator
var	false	false	String	The name to store the resultant iterator into page context, if such name is supplied

Examples

Example One:
<pre>
Generate a simple iterator
<s:generator val="%{'aaa,bbb,ccc,ddd,eee'}">
 <s:iterator>
     <s:property /><br/>
 </s:iterator>
</s:generator>
</pre>
This generates an iterator and print it out using the iterator tag.

Example Two:
<pre>
Generate an iterator with count attribute
<s:generator val="%{'aaa,bbb,ccc,ddd,eee'}" count="3">
 <s:iterator>
     <s:property /><br/>
 </s:iterator>
</s:generator>
</pre>
This generates an iterator, but only 3 entries will be available in the iterator
generated, namely aaa, bbb and ccc respectively because count attribute is set to 3

Example Three:
<pre>
Generate an iterator with var attribute
<s:generator val="%{'aaa,bbb,ccc,ddd,eee'}" count="4" separator="," var="myAtt" />
<%
 Iterator i = (Iterator) pageContext.getAttribute("myAtt");
 while(i.hasNext()) {
     String s = (String) i.next(); %>
     <%=s%> <br/>
<%    }
%>
</pre>
This generates an iterator and put it in the PageContext under the key as specified
by the var attribute.


Example Four:
<pre>
Generate an iterator with comparator attribute
<s:generator val="%{'aaa,bbb,ccc,ddd,eee'}" converter="%{myConverter}">
 <s:iterator>
     <s:property /><br/>
 </s:iterator>
</s:generator>


public class GeneratorTagAction extends ActionSupport {

  ....

  public Converter getMyConverter() {
     return new Converter() {
         public Object convert(String value) throws Exception {
             return "converter-"+value;
         }
     };
  }

  ...

}
</pre>
This will generate an iterator with each entries decided by the converter supplied. With
this converter, it simply add "converter-" to each entries.

Description

Parameters

Dynamic Attributes Allowed:

Name

Required

Default

Evaluated

Type

Description

Examples