JSF ui repeat : Array index out of range: 0 [duplicate] - jsf

Question

I would like to know if it possible to push a value from inside a <ui:repeat> to a map, a set or a list?
I would like to pass the value of the <h:inputtext> to a set.
Code:
<ui:repeat var="_par" value="#{cmsFilterParameterHandler.normaleSuchParameter()}">
<p:outputLabel value="#{_par.bezeichnung}" />
<p:spacer width="5px" />
<p:inputText id="me" value="#{??? push me to a set ???}"/>
<br /><br />
</ui:repeat>

Answer 1

With a Set, it is not possible as it doesn't allow referencing items by index or key. It's however possible with a List and a Map by just specifying the list index and map key in the input value.
With a List:
private List<String> list; // +getter (no setter necessary)
#PostConstruct
public void init() {
list = createAndFillItSomehow();
}
<ui:repeat value="#{bean.list}" varStatus="loop">
<h:inputText value="#{bean.list[loop.index]}" />
</ui:repeat>
With a Map (only if your environment supports EL 2.2 or JBoss EL):
private Map<String, String> map; // +getter (no setter necessary)
#PostConstruct
public void init() {
map = createAndFillItSomehow();
}
<ui:repeat value="#{bean.map.entrySet().toArray()}" var="entry">
<h:inputText value="#{bean.map[entry.key]}" />
</ui:repeat>
Noted should be that the canonical approach is to use a List of fullworthy javabeans. Let's assume a Javabean class named Par with properties id and value which maps exactly to a par table in DB with columns id and value:
private List<Par> pars; // +getter (no setter necessary)
#PostConstruct
public void init() {
pars = createAndFillItSomehow();
}
<ui:repeat value="#{bean.pars}" var="par">
<h:inputText value="#{par.value}" />
</ui:repeat>
Either way, it works as good when using <p:inputText>, it's in no way related to PrimeFaces, it's in the context of this question merely a jQuery based JSF UI component library. Just replace h: by p: to turn it on.

Answer 2

I'm not sure, if I understood your requirements correctly.
I suppose the following: You need a List of Strings in some backend and an ui:repeat tag to iterate over those strings with input-fields to edit them. Maybe there are some syntax-issues, but my idea should be clear:
public class Backend {
private List<String> myStrings;
public MyStringWrapper getMyStringWrapper(int index) {
return new MyStringWrapper(index);
}
public class MyStringWrapper {
private final int index;
public MyStringWrapper(int index) { this.index = index; }
public String getContent() { return myStrings.get(index); }
public void setContent(String newContent) { myStrings.add(index, newContent); }
}
}
In the frontend you use as follows:
<ui:repeat var="_index" value="#{backend.getIndexSequence()}">
<p:inputText value="#{backend.getMyStringWrapper(_index).content}"/>
</ui:repeat>
Of course, you have to provide a getIndexSequence-method which produces a list of ints ranging from 0 to the size of the strings.

Answer 3

Do you mean like this?
<p:inputText id="me" value="#{_par.input}"/>
in BackBean:
public class Par implements Serializable {
private String inputText;
private String bezeichnung;
public Par()
{
}
public void setInput(String input)
{
this.inputText = input;
}
public String getInput()
{
return this.inputText
}
public void setBezeichnung(String bezeichnung)
{
this.bezeichnung = bezeichnung;
}
public String getBezeichnung()
{
return this.bezeichnung
}
}