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>
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.
inputText and how will this value be written into the backed List (in the first case)? I think without explicit "clean" getter and setter (clean = without additional arguments) this does not work, does it?
inputText". Do you mean, you want to preserve/prefill some default values? Just do the job in createAndFillItSomehow() accordingly. Create new ArrayList<>(). Set the desired items in it, which can be null for an empty input, or "foo" for an input with "foo" prefilled.list or map the usual way. The submitted values are already updated in there. Think logically, this answer would otherwise have no point at all.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.
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
}
}
