logic:iterate -- urgent

[Vineela Devi]

Hi All,

I have an arraylist of Emp Ids and an arraylist of EmpNames.How can i concatentae both of them and display using logic iterate tag?

i.e. Emp Name Empid
John 001
Tom 002

I wnat to display the list in a jsp as

John 001
Tom 002
etc.

If not possible with logic:iterate any other solution is also ok

Thanks in advance

vineela

[Ankur Srivastava]

Create two tables inside a table this way

<table>
<td>
<table>
<!-- Use Iterate tag -->
</table>
</td>
<td>
<table>
<!-- Use Iterate tag -->
</table>
</td>
</table>

I hope this approach will solve your problem.

[Nicholas Cheung]

If you have 2 arrayLists, say empIds and empNames, you could put the 2 arrary lists into the request inside the DispatchAction:

public ActionForward XXX(...) {
  // Creates the 2 array lists
  request.setAttribute("empIds", empIds);
  request.setAttribute("empNames", empNames);
  request.setAttribute("empIds_counter", Integer.toString(empIds.size()));
  request.setAttribute("empNames_counter", Integer.toString(empNames.size()));
  ...
 
  return mapping.findForward("target_JSP");
}

Then, inside your JSP, you can use <c:forEach> to loop out all data:

<c:choose>
  <!-- Make sure empIds and empNames not null, and they have same no. of 
       elements -->
  <c:when test="${requestScope.empIds_counter > 0 &&
                  requestScope.empNames_counter > 0 &&
                  requestScope.empIds_counter = requestScope.empNames_counter}">
    <c:forEach var="count" begin="0" end="${requestScope.empIds_counter-1}">
      <tr>
        <td><c :o ut value="${requestScope.empIds[count]}"/></td>
        <td><c :o ut value="${requestScope.empNames[count]}"/></td>
      </tr>
    </c:forEach>
  </c:when>
  <c :o therwise>
  <!-- do nothing -->
  </c :o therwise>
</c:choose>

I dont know how to use <logic:iterator> and thus, I can only provide a solution that with <c:forEach>.

Hope this help.

Nick
[ May 20, 2004: Message edited by: Nicholas Cheung ]

[Jagdeep Singh]

You need to build new ArrayList concatnating this two together and then use following code...

<html:select property="empD" styleClass="blk9fntnor" >
<logic:iterate id="empIds" name="EMPID_COLLECTION" type="com....vo.EmpeVo">
<bean efine id="tempValue" name="empIds" property="empID" type="java.lang.String"/>
<bean efine id="tempLabel" name="empIds" property="empName" type="java.lang.String"/>
<%
String refSourceID = CUtil.convertNullToString(empID());
%>
<%if(empID.equals(tempValue)){%>
<option value="<%=tempValue%>" selected><%=tempLabel%></option>
<%}else{%>
<option value="<%=tempValue%>"><%=tempLabel%></option>
<%}%>
</logic:iterate>
</html:select>

[Marc Peabody]

Sounds like a VERY good candidate for a Map instead of 2 Lists.

[Nicholas Cheung]

In fact, the best way to deal with this case should be using of TransferObject, instead of using any Map or List. We can create a TransferObject (TO) for EmpInfo as follows:

public class EmpInfo {
  private String empId;
  private String empName;
 
  // The getters and setters for the attributes
}

And the data are stored in the form of TO, and thus, when the data server returns a List or Collection of this type of TO, you store the list or collection into the request by:

Collection c = getEmpInfo();
request.setAttribute("empInfos", c);

Then you can simply access it by:

<c:forEach var="empInfo" item="${requestScope.empInfos}">
  <tr>
    <td><c:out value="${empInfo.empId}"/></td>
    <td><c:out value="${empInfo.empName}"/></td>
  </tr>
</c:forEach>

Thus, you even dont need to access the data via the Map, you can use an OO approach to access your data.

Nick
[ May 20, 2004: Message edited by: Nicholas Cheung ]