On 3/3/09 9:42 PM, Lincoln Baxter, III wrote:
> This seems like an implementation issue/shortcoming. It seems logical
> to me that despite String being immutable, it should still be a
> functional dataTable value... the fact that java.lang.String is
> immutable should not affect the behavior of the DataTable.... Just
> have the table create a new string...
I don't see this as an issue with UIData.
From the provided example:
-------------------------------------
<h:inputText value="#{name}">
...
</h:inputText>
-------------------------------------
No property is specified (i.e. name.<property>).
From the javadocs of ELResolver.setValue():
Attempts to set the value of the given property object on the given
base object.
So, what exactly is going to be set on the #{name} object?
>
> Thoughts?
>
> On Tue, 2009-03-03 at 22:35 -0700, Joel Weight wrote:
>> You can't "update" a string because String objects are immutable.
>> This is why it works with your StringWrapper and not with String.
>> I'm a relative newbie with facelets, but I'm guessing you'll have to
>> use some object ( as you already surmised with your StringWrapper )
>> that has a String property that you can modify instead of changing
>> the object itself like you are with a List<String> and value="#{name}
>>
>> Joel
>>
>> On Tue, Mar 3, 2009 at 2:44 PM, <webtier_at_javadesktop.org
>> <mailto:webtier_at_javadesktop.org>> wrote:
>>
>> Hi,
>>
>> I have an h:datatable which is bound to a List<String> object in
>> my bean class. I want the datatable to display a list of inputs
>> which will allow the user to update these String values.
>>
>> My problem is that my bean is not accepting the user's updates.
>> If I create a new object to hold the String (i.e. StringWrapper),
>> and I attach my data table to a List<StringWrapper>, I get the
>> functionality I want. But do I really have to resort to this?
>>
>> Any input or ideas appreciated. Thanks.
>>
>> Here is my code:
>>
>> [b]Facelet:[/b]
>> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
>> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
>> <html xmlns="http://www.w3.org/1999/xhtml"
>> xmlns:h="http://java.sun.com/jsf/html"
>> xmlns:a4j="http://richfaces.org/a4j"
>> xmlns:f="http://java.sun.com/jsf/core">
>> <head>
>> </head>
>> <body>
>> <f:view>
>> <!-- This datatable is dealing with an object, it works fine -->
>> <h:form>
>> <h:dataTable id="people" value="#{testObj.list}" var="person">
>> <h:column>
>> <h:inputText value="#{person.firstname}">
>> <a4j:support event="onchange" reRender="rows" />
>> </h:inputText>
>> </h:column>
>> </h:dataTable>
>> <h:panelGroup>
>> <h:commandButton value="Add Row" action="#{testObj.addPerson}" />
>> </h:panelGroup>
>> </h:form>
>> <!-- This datatable is dealing with String, it doesn't work at
>> all -->
>> <h:form>
>> <h:dataTable id="names" value="#{testObj.names}" var="name">
>> <h:column>
>> <h:inputText value="#{name}">
>> <a4j:support event="onchange" reRender="names" />
>> </h:inputText>
>> </h:column>
>> </h:dataTable>
>> <h:panelGroup>
>> <h:commandButton value="Add Row" action="#{testObj.addName}" />
>> </h:panelGroup>
>> </h:form>
>> </f:view>
>> </body>
>> </html>
>>
>> [b]Backing Bean:[/b]
>> public class TestObj implements Serializable {
>>
>> private static final long serialVersionUID = 0x066E639ED3098D82L;
>>
>> private List<Person> people = new ArrayList<Person>();
>> private List<String> names = new ArrayList<String>();
>>
>> public TestObject() {
>> people.add(new Person());
>> names.add(new String());
>> }
>>
>> public List<Person> getList() {
>> return people;
>> }
>>
>> public String addPerson() {
>> people.add(new Person());
>> return null;
>> }
>>
>> public List<String> getNames() {
>> return names;
>> }
>>
>> public String addName() {
>> names.add(new String());
>> return null;
>> }
>>
>> public class Person implements Serializable {
>>
>> private static final long serialVersionUID = 1L;
>>
>> private String firstname;
>> public String getFirstname() {
>> return firstname;
>> }
>> public void setFirstname(String firstname) {
>> this.firstname = firstname;
>> }
>>
>> }
>> }
>> [Message sent by forum member 'chrisouellette' (chrisouellette)]
>>
>> http://forums.java.net/jive/thread.jspa?messageID=334921
>>
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