Question

I have a code like this:

<ui:repeat value="#{myController.fileList}}"  var="element" >
<t:inputFileUpload value="#{myController.uploadedFile[element]}"  />
</ui:repeat>

but this returns an error : java.lang.NumberFormatException: For input string: “[0]}”. UploadedFile is an array of Files. When i wrote code like this

...
<t:inputFileUpload value="#{myController.uploadedFile[0]}"  />
...

everything is ok, but i want to have there values between 0-8, not only ‘0’, and this has to be returned from my controller. So how to convert this ‘element’ to int value inside <t:inputFileUpload value="#{myController.uploadedFile[element]}" />? Thanks for help.

Answer 1

You can use the varStatus attribute to obtain the loop status.

<ui:repeat value="#{myController.fileList}" var="element" varStatus="loop">
    <t:inputFileUpload value="#{myController.uploadedFile[loop.index]}" />
</ui:repeat>

(only available in JSF 2.x by the way, in JSF 1.x your best bet might be c:forEach)

But why don’t you just use the following?

<ui:repeat value="#{myController.uploadedFile}" var="uploadedFile">
    <t:inputFileUpload value="#{uploadedFile}" />
</ui:repeat>

---

Update: the fileList must be of type List<Integer> or Integer[] or int[] and the uploadedFile must be of type List<SomeObject> or SomeObject[] to get your initial code to work.

---

Update 2: here’s a small reproducible test snippet:

XHTML:

<h:form>
    <h:selectManyCheckbox value="#{bean.selectedIndexes}">
        <f:selectItems value="#{bean.selectIndexes}" />
    </h:selectManyCheckbox>
    <h:commandButton value="submit" />
</h:form>
<ui:repeat value="#{bean.selectedIndexes}" var="selectedIndex">
    <p><h:outputText value="#{bean.list[selectedIndex]}" /></p>
</ui:repeat>

Bean:

private List<SelectItem> selectIndexes; // +getter
private List<Integer> selectedIndexes; // +getter +setter
private List<String> list; // +getter

public Bean() {
    selectIndexes = new ArrayList<SelectItem>();
    selectIndexes.add(new SelectItem(0, "one"));
    selectIndexes.add(new SelectItem(1, "two"));
    selectIndexes.add(new SelectItem(2, "three"));
    selectIndexes.add(new SelectItem(3, "four"));
    selectedIndexes = new ArrayList<Integer>();
    list = Arrays.asList("one", "two", "three", "four");
}

Works fine here on Mojarra 2.0.3 and Apache Tomcat 6.0.29. You only need to substitute selectedIndexes as fileList and list as uploadedFile.