As it turns out, some of my ideas about a "standard" property of type Map versus
a "mapped property" were a bit off. So, if you're still interested, here's
something I hacked together. You'll notice I used a session scoped form so that
Struts doesn't choke when it tries to populate the form.
struts-config.xml:
------------------
<form-beans>
<form-bean name="employeesForm"
type="org.apache.struts.action.DynaActionForm">
<form-property name="employeesMap" type="java.util.Map"/>
</form-bean>
</form-beans>
<action-mappings>
<action path="/employees/edit"
type="com.dotech.EditEmployeesAction"
name="employeesForm"
scope="session"
validate="false">
<forward name="success" path="/editEmployees.jsp"/>
</action>
<action path="/employees/save"
type="org.apache.struts.actions.ForwardAction"
parameter="/viewEmployees.jsp"
name="employeesForm"
scope="session"
validate="false"/>
</action-mappings>
editEmployees.jsp:
------------------
<%@ taglib prefix="bean" uri="http://jakarta.apache.org/struts/tags-bean"; %>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"; %>
<%@ taglib prefix="html" uri="http://jakarta.apache.org/struts/tags-html"; %>
<%-- dynamically get a handle to the form --%>
<bean:struts id="mapping" mapping="/employees/save"/>
<c:set var="attribute" value="${mapping.attribute}"/>
<c:set var="scope" value="${mapping.scope}"/>
<c:choose>
<c:when test="${scope eq 'request'}">
<c:set var="form" value="${requestScope[attribute]}"/>
</c:when>
<c:otherwise>
<c:set var="form" value="${sessionScope[attribute]}"/>
</c:otherwise>
</c:choose>
<html>
<head><title>Edit Employees</title></head>
<body>
<html:form action="/employees/save">
<table>
<c:forEach var="entry" items="${form.map.employeesMap}">
<tr>
<td><c:out value="${entry.key}"/></td>
<td>
<input type="text"
name="<c:out value="employeesMap(${entry.key}).name"/>"
value="<c:out value="${entry.value.name}"/>">
</td>
<td>
<input type="text"
name="<c:out value="employeesMap(${entry.key}).age"/>"
value="<c:out value="${entry.value.age}"/>">
</td>
</tr>
</c:forEach>
<tr>
<td align="center" colspan="3"><html:submit/></td>
</tr>
</table>
</html:form>
</body>
</html>
EmployeeBean.java:
------------------
package com.dotech;
public class EmployeeBean {
private String name;
private String age;
public EmployeeBean(String name, String age) {
this.name = name;
this.age = age;
}
public String getName() { return this.name; }
public void setName(String name) { this.name = name; }
public String getAge() { return this.age; }
public void setAge(String age) { this.age = age; }
}
EditEmployeesAction.java:
-------------------------
package com.dotech;
import java.util.*;
import javax.servlet.http.*;
import org.apache.commons.beanutils.*;
import org.apache.struts.action.*;
public class EditEmployeesAction extends Action {
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception {
Map empMap = new HashMap();
empMap.put("1111", new EmployeeBean("John Doe", "33"));
empMap.put("2222", new EmployeeBean("Loser Boy", "22"));
PropertyUtils.setProperty(form, "employeesMap", empMap);
return mapping.findForward("success");
}
}
viewEmployees.jsp:
------------------
<%@ taglib prefix="bean" uri="http://jakarta.apache.org/struts/tags-bean"; %>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"; %>
<%-- dynamically get a handle to the form --%>
<bean:struts id="mapping" mapping="/employees/save"/>
<c:set var="attribute" value="${mapping.attribute}"/>
<c:set var="scope" value="${mapping.scope}"/>
<c:choose>
<c:when test="${scope eq 'request'}">
<c:set var="form" value="${requestScope[attribute]}"/>
</c:when>
<c:otherwise>
<c:set var="form" value="${sessionScope[attribute]}"/>
</c:otherwise>
</c:choose>
<html>
<head><title>View Employees</title></head>
<body>
<table>
<c:forEach var="entry" items="${form.map.employeesMap}">
<tr>
<td><c:out value="${entry.key}"/></td>
<td><c:out value="${entry.value.name}"/></td>
<td><c:out value="${entry.value.age}"/></td>
</tr>
</c:forEach>
</table>
</body>
</html>
Quoting Kris Schneider <[EMAIL PROTECTED]>:
> Okay, so that's way too much work ;-). I'm not sure, but I think one of the
> issues you're running into is the difference between a "standard" property
> of
> type Map and a "mapped property". The first is declared like:
>
> public Map getEmployeesMap()
> public void setEmployeesMap(Map m)
>
> The second is declared like:
>
> public Object getEmployeeMapped(String key)
> public void setEmployeeMapped(String key, Object value)
>
> For a mapped property, you'd use a reference like "employeeMapped(1111)" to
> get
> the object stored under the "1111" key. I really haven't played much with
> either
> of the above cases, so I may be off base...
>
> Quoting Rick Reumann <[EMAIL PROTECTED]>:
>
> > Ok stupid subject line, but now I can get back to something I was
> > curious about that I posted around a week ago. I'm really curious how to
> > do accomplish this and yes have tried it a bunch of different ways...
> >
> > Here's the challenge....
> >
> > First challenge is just with a regular ActionForm...
> >
> > 1) Your ActionForm has to have a property of type Map. For this
> > adventure call it employeesMap.
> >
> > 2) Each map will hold for the key and employeeID ( String ssn - social
> > security number whatever). The value will be an EmployeeBean. For
> > testing sake just have it have two properties String name, String age.
> >
> > 3) Put two employees into the Map and put this Map into your ActionForm:
> > HashMap empMap = new HashMap();
> > empMap.put( "1111", new EmployeeBean("John Doe", "33" ) );
> > empMap.put( "2222", new EmployeeBean("Loser Boy", "22" ) );
> > setEmployeesMap( empMap );
> >
> > 4) Now have a jsp form iterate over this Map and provide text fields to
> > edit the name and age of each employee. When the form is submitted there
> > should be a way that it will submit this Map with updated EmployeeBeans
> > with the new names and ages for each key (1111 and 2222 ). Pull the map
> > out of the action you submit to and print the properties of the
> > EmployeeBeans to test.
> >
> >
> > Second challenge... is do the above using your employeesMap as a
> > property of a DynaActionForm.
> >
> > Preferably use JSTL and/or struts-el also would be nice.
> >
> > (First one to successfully complete this challenge will win 100 dollars
> > for each person that they forward this e-mail to, as Microsoft will be
> > monitoring all the e-mails as well. That kid doing this project for his
> > science fair project to see how far e-mails travel will also be
> > involved, so please reply to him. The 100 dollars will come from that
> > African tribe leader with that money he is just dying to give away if
> > you just contact him. Some of the money might come from the stolen
> > tourist kidney sales in Mexico, but I'm not positive of that).
> >
> > --
> > Rick
>
> --
> Kris Schneider <mailto:[EMAIL PROTECTED]>
> D.O.Tech <http://www.dotech.com/>
--
Kris Schneider <mailto:[EMAIL PROTECTED]>
D.O.Tech <http://www.dotech.com/>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
