There is an object ObjectA
which has a list of ObjectB
. There is a TreeMap
inside the ObjectB
. This TreeMap
has a String
as key and a List
of another object ObjectC
as value. This TreeMap
and the list
inside has been displayed on the jsp
using the s:iterator
and s:textfield
and it is being displayed correctly. i.e. the "values" inside the s:textfield are correct. Now, the problem arises when the textfield is modified. How do we capture the modified values inside ObjectC in the action class? With the code given here, the key ("Key1") comes in the action but the value is null.
Java Code
public class ObjectA implements Serializable {
private Integer attr1;
private List<ObjectB> objB;
//...getters and setters....
public class ObjectB implements Serializable {
private Integer attr11;
private TreeMap<String,List<ObjectC>> allPlainFields;
// ...getters and setters....
public class ObjectC implements Serializable {
private Integer attr111;
public String attr112;
// ...getters and setters....
JSP Code
<s:iterator value="objA.objB" var="currentObjB" status="currentGroupStatus">
<s:iterator value="#currentObjB.allPlainFields" var="parentMap" status="headerStatus">
<s:iterator value="#parentMap.value" var="fieldList" status="fieldStatus">
<s:textfield name="objA.objB[%{#currentGroupStatus.index}].allPlainFields['%{#parentMap.key}'][%{#fieldStatus.index}].attr112"/>
</s:iterator>
</s:iterator>
HTML rendered:
<input type="text" id="review-act1_objA_objB_0__allPlainFields_'Key1'__6__attr112" value="Correct Value" name="objA.objB[0].allPlainFields['Key1'][0].attr112">
The object structure in the "VAriables" view of eclipse shows:
objA Object A (id=955)
objB ArrayList<E> (id=966)
elementData Object[10] (id=967)
[0] ObjectB (id=968)
allPlainFields TreeMap<K,V> (id=972)
comparator null
descendingMap null
entrySet TreeMap$EntrySet (id=979)
keySet null
modCount 1
navigableKeySet null
root TreeMap$Entry<K,V> (id=980)
size 1
values null
[1] ObjectB (id=969)
[2] ObjectB (id=970)
[3] ObjectB (id=971)
[4] null
[5] null
[6] null
[7] null
[8] null
[9] null
modCount 4
size 4
****In the Eclipse "Variables" view, the value for allPlainFields is**:** {Key1=}
EDIT(27-Feb-2013):
Tried this but didn't work. The values appear on jsp but when submitted, they don't come in action:
In Action
class:
private TreeMap<String,ObjectCList> testTreeMap = new TreeMap<String,ObjectCList>();
//get,set and setting two keys in map "mykey1" and "mykey2"
In ObjectCList
class:
private ArrayList<ObjectC> paramMdlList;
//default constructor, get, set
In JSP
:
<s:form id="test-map" method="post">
<s:iterator value="testTreeMap" var="pMap" status="hStatus">
<li><label><s:property value="%{#pMap.key}" /></label>
<s:iterator value="%{#pMap.value.paramMdlList}" var="pList" status="innerStatus">
<s:textfield name="testTreeMap['%{#pMap.key}'].paramMdlList[%{#innerStatus.index}].attr111"/>
<s:textfield name="testTreeMap['%{#pMap.key}'].paramMdlList[%{#innerStatus.index}].attr112"/>
</s:iterator>
</li>
</s:iterator>
<s:submit value=" " type='button' id="btnh1" action="saveTreeMap">
<span>Save TreeMap</span>
</s:submit>
</s:form>
When the form is submitted, updateTreeMap
method of the action
is called. The map is printed as mentioned here :
public String updateTreeMap(){
for (Map.Entry<String, ObjectCList> entry : testTreeMap.entrySet())
{
System.out.println(entry.getKey() + "/" + entry.getValue());
}
return SUCCESS;
}
What is "printed" : mykey1/ mykey2/ i.e. null values
The screen below shows values coming in jsp
According to your latest update. If you are using TreeMap
Struts2 cannot correctly determine type of elements inside it. Change declaration of testTreeMap
from TreeMap
to Map
.
private Map<String,ObjectCList> testTreeMap = new TreeMap<String,ObjectCList>();
Or annotate testTreeMap
with com.opensymphony.xwork2.util.Element
annotation to tell Struts2 what type are elements inside map.
@Element(value = ObjectCList.class)
private TreeMap<String,ObjectCList> testTreeMap = new TreeMap<String,ObjectCList>();