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JSF Editor shows an invalid error/warning when I used h:selectManyListbox with a value assigned to a String array. When I deployed the code it works fine but the JSF editor shows it as an error/warning with comment “EL expression does not evaluate to expected types for this attrribute”.
My environment is – Eclipse 3.2 and MyEclipse5.0, JDK1.4, JSF1.1 (Sun reference Impl)
How can I use JSF1.2? Do MyEclipse has support for JSF1.2? I created a MyEclipse Web Project and when I right click to add JSF capabilities, i can only found JSF1.1.
Ok. here the sample code –
JSF –
<%@ page language=”java” pageEncoding=”ISO-8859-1″%>
<%@ taglib uri=”http://java.sun.com/jsf/html” prefix=”h”%>
<%@ taglib uri=”http://java.sun.com/jsf/core” prefix=”f”%><%
String path = request.getContextPath();
String basePath = request.getScheme() + “://”
+ request.getServerName() + “:” + request.getServerPort()
+ path + “/”;
%><!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”>
<html>
<head>
<base href=”<%=basePath%>”><title>My JSP ‘MyJsp.jsp’ starting page</title>
<meta http-equiv=”pragma” content=”no-cache”>
<meta http-equiv=”cache-control” content=”no-cache”>
<meta http-equiv=”expires” content=”0″>
<meta http-equiv=”keywords” content=”keyword1,keyword2,keyword3″>
<meta http-equiv=”description” content=”This is my page”>
<!–
<link rel=”stylesheet” type=”text/css” href=”styles.css”>
–></head>
<body>
<f:view><h:form>
<table border=”0″ cellpadding=”10″>
<tr>
<td><h:selectManyListbox value=”#{UserBean.firstSelectedList}”
rendered=”true” required=”false” size=”20″> <f:selectItems value=”#{UserBean.firstList}” />
</h:selectManyListbox>
</td>
<td align=”center”><h:commandButton value=”>” rendered=”true”
action=”#{UserBean.doButton1}” />
<br>
<h:commandButton value=”>>” rendered=”true”
action=”#{UserBean.doButton2}” />
<br>
<h:commandButton value=”Remove” rendered=”true” action=”#{UserBean.doButton3}” />
<br>
<h:commandButton value=”RemoveAll” rendered=”true” action=”#{UserBean.doButton4}” /></td>
<td>
<h:selectManyListbox value=”#{UserBean.secondSelectedList}”
rendered=”true” required=”false” size=”20″>
<f:selectItems value=”#{UserBean.secondList}” />
</h:selectManyListbox>
</td>
</tr>
</table>
</h:form>
</f:view>
</body>
</html>and the Managed Bean –
/**
*
*/
package com.mastercard;import java.util.ArrayList;
import java.util.List;import javax.faces.model.SelectItem;
/**
* @author e023881
*
*/
public final class UserBean extends Object {/**
*
*/
private String password;
/**
*
*/
private String name;private List firstList;
private String[] firstSelectedList;private List secondList;
private String[] secondSelectedList;/**
* @return the firstList
*/
public List getFirstList() {if(firstList == null)
{
firstList=new ArrayList();CMSelectedItem item1=new CMSelectedItem(“685663528525″,”685663528525”);
CMSelectedItem item2=new CMSelectedItem(“685663528524″,”685663528524”);firstList.add(item1);
firstList.add(item2);
}return firstList;
}
/**
* @param firstList the firstList to set
*/
public void setFirstList(List firstList) {
this.firstList = firstList;
}/**
* @return the secondList
*/
public List getSecondList() {if(secondList == null)
secondList = new ArrayList();return secondList;
}
/**
* @param secondList the secondList to set
*/
public void setSecondList(List secondList) {
this.secondList = secondList;
}/**
* @return the firstSelectedList
*/
public String[] getFirstSelectedList() {
return firstSelectedList;
}
/**
* @param firstSelectedList the firstSelectedList to set
*/
public void setFirstSelectedList(String[] firstSelectedList) {
this.firstSelectedList = firstSelectedList;
}
/**
* @return the secondSelectedList
*/
public String[] getSecondSelectedList() {
return secondSelectedList;
}
/**
* @param secondSelectedList the secondSelectedList to set
*/
public void setSecondSelectedList(String[] secondSelectedList) {
this.secondSelectedList = secondSelectedList;
}/**
* @return the password
*/
public String getPassword() {
return password;
}
/**
* @param password the password to set
*/
public void setPassword(String password) {
this.password = password;
}
/**
* @return the name
*/
public String getName() {
return name;
}
/**
* @param name the name to set
*/
public void setName(String name) {
this.name = name;
}public String loginUser() {
if(“myeclipse”.equals(getName()) && “myeclipse”.equals(getPassword()))
return “success”;// FacesContext facesContext = FacesContext.getCurrentInstance();
// FacesMessage facesMessage = new FacesMessage(
// “You have entered an invalid user name and/or password”);
// facesContext.addMessage(“loginForm”, facesMessage);return “failure”;
}public String doButton1()
{String[] selected=getFirstSelectedList();
if(selected != null)
{
for(int i=0;i<selected.length;i++)
{
CMSelectedItem item1=new CMSelectedItem(selected[i],selected[i]);if(!getSecondList().contains(item1))
secondList.add(item1);}
}
return null;
}public String doButton2()
{
setSecondList(firstList);return null;
}public String doButton3()
{
String[] selected=getSecondSelectedList();if(selected != null)
{
for(int i=0;i<selected.length;i++)
{
CMSelectedItem item1=new CMSelectedItem(selected[i],selected[i]);if(getSecondList().contains(item1))
secondList.remove(item1);}
}
return null;
}
public String doButton4()
{
secondList = new ArrayList();return null;
}}
Has this been declared a bug?
I am seeing the same behavior, except the “value” is of type List instead of String[].
Paul Spencer
