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https://issues.apache.org/jira/browse/WICKET-2852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12902293#action_12902293
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Hudson commented on WICKET-2852:
--------------------------------
Integrated in Apache Wicket 1.4.x #117 (See
[https://hudson.apache.org/hudson/job/Apache%20Wicket%201.4.x/117/])
fixed npe in palette
Issue: WICKET-2852
> Palette nested in a ListView results in a NPE when an error feedback is
> logged when submitting form
> ---------------------------------------------------------------------------------------------------
>
> Key: WICKET-2852
> URL: https://issues.apache.org/jira/browse/WICKET-2852
> Project: Wicket
> Issue Type: Bug
> Affects Versions: 1.4.7
> Reporter: Robin Shine
> Assignee: Igor Vaynberg
> Priority: Minor
> Fix For: 1.4.11, 1.5-M2
>
>
> Reproducing steps:
> 1. Put TestPage.html and TestPage.java into a wicket application, visit test
> page.
> 2. Hit the save button and NullPointerException will be thrown indicating the
> "ids" field of component Palette$Recorder is not initialized
> If taken Palette outside of ListView, the code will work fine.
> TestPage.html:
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";>
> <?xml version="1.0" encoding="UTF-8"?>
> <html xmlns="http://www.w3.org/1999/xhtml";>
> <head>
> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
> </head>
> <body>
> <form wicket:id="form">
> <div wicket:id="palettes">
> <div wicket:id="palette"></div>
> </div>
> <input type="submit" value="save"></input>
> </form>
> <div wicket:id="feedback"></div>
> </body>
> </html>
> TestPage.java:
> import java.util.ArrayList;
> import java.util.List;
> import org.apache.wicket.extensions.markup.html.form.palette.Palette;
> import org.apache.wicket.feedback.ContainerFeedbackMessageFilter;
> import org.apache.wicket.markup.html.WebPage;
> import org.apache.wicket.markup.html.form.Form;
> import org.apache.wicket.markup.html.form.IChoiceRenderer;
> import org.apache.wicket.markup.html.list.ListItem;
> import org.apache.wicket.markup.html.list.ListView;
> import org.apache.wicket.markup.html.panel.FeedbackPanel;
> import org.apache.wicket.model.AbstractReadOnlyModel;
> import org.apache.wicket.model.IModel;
> public class TestPage extends WebPage {
>
> @SuppressWarnings({ "unchecked", "serial" })
> public TestPage() {
> Form form = new Form("form") {
> @Override
> protected void onSubmit() {
> error("Please select a value.");
> }
>
> };
> add(form);
>
> List<String> list = new ArrayList<String>();
> list.add("1");
>
> form.add(new ListView("palettes", list) {
> @Override
> protected void populateItem(ListItem item) {
> IChoiceRenderer renderer = new IChoiceRenderer() {
> public Object getDisplayValue(Object
> object) {
> return object;
> }
> public String getIdValue(Object object,
> int index) {
> return (String) object;
> }
>
> };
> final List selected = new ArrayList();
> IModel model = new IModel() {
> public Object getObject() {
> return selected;
> }
> public void setObject(Object object) {
> selected.clear();
> selected.addAll((List) object);
> }
> public void detach() {
> }
>
> };
>
> IModel choicesModel = new AbstractReadOnlyModel() {
> @Override
> public Object getObject() {
> final List<String> choices = new
> ArrayList<String>();
> choices.add("1");
> choices.add("2");
> return choices;
> }
>
> };
>
> item.add(new Palette("palette", model,
> choicesModel, renderer, 10, false));
> }
>
> });
>
> add(new FeedbackPanel("feedback", new
> ContainerFeedbackMessageFilter(this)));
> }
>
> }
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