Accessing Map of Map in struts 2.3.1.2

[Niral Trivedi]

Hi All,

I have just now upgraded from Struts 2.0.11 to struts 2.3.1.2 version and
running in to weird issue.

Basically, I have Object having HashMap holding HashMap. Something like
below :

public class TestVO {
         private HashMap<String, HashMap> firstMap;


         //I've setter/getter in real code but omitting here for simplicity.
}

My Action class goes as below :

public class MyAction extends ActionSupport {
        public TestVO testVO;

        public TestVO getTestVO() {
                  return this.testVO;
        }
        public void setTestVO(TestVO testVO) {
                 this.testVO = testVO;
        }

        public String execute() {
               HashMap<String, HashMap> firstMap = new HashMap<String,
HashMap>();
               HashMap<String, String> secondMap = new HashMap<String,
String>();


               secondMap.put("FIRST_KEY", "firstValue");
               secondMap.put("SECOND_KEY", "secondValue");

               firstMap.put("KEY1", secondMap);

               testVO.setFirstMap(firstMap);

               return "success";
        }
}

Now with above VO and class, I am doing below in my JSP and it is not
working after upgrade.

<s:property value="testVO.FirstMap.FIRST_KEY" />

Now above code was perfectly working fine with old struts 2.0.11 jar but
after upgrading this doesn't seem to be working.

I have tried doing <s:property value="testVO.FirstMap.['FIRST_KEY']" /> and
<s:property value="%{testVO.FirstMap.['FIRST_KEY]'}" /> but to no luck.

Am I missing something here ? Is there a different way to access Map of Map
with latest version ?

Please let me know if anyone has any idea.

Thank you.