generator
Please make sure you have read the Tag Syntax document and understand how tag attribute syntax works.
Description
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.
Generate an iterator for a iterable source.
Attributes
| Dynamic Attributes Allowed:false | |||||
| Name | Required | Default | Evaluated | Type | Description | 
|---|---|---|---|---|---|
| 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 | |
| performClearTagStateForTagPoolingServers | false | false | false | Boolean | Whether to clear all tag state during doEndTag() processing | 
| 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 1: generate a simple iterator
<s:generator val="%{'aaa,bbb,ccc,ddd,eee'}">
 <s:iterator>
     <s:property /><br/>
 </s:iterator>
</s:generator>
This generates an iterator and print it out using the iterator tag.
Example 2: 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>
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 3: 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/>
<%    }
%>
This generates an iterator and put it in the PageContext under the key as specified by the var attribute.
Example 4: 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;
         }
     };
  }
  ...
}
This will generate an iterator with each entries decided by the converter supplied. With this converter, it simply add “converter-“ to each entries.
