Hi,
i have experienced a NullPointerException in Check.java during render of my
page. I have a page which has DropDownChoice (
wantOnSelectionChangedNotifications=true) and CheckGroup (contains Check
objects). If i change the dropdown, and refreshes the page, then i am
getting NullPE as below:
Caused by: java.lang.NullPointerException
at wicket.markup.html.form.Check.onComponentTag(Check.java:132)
at wicket.Component.renderComponent(Component.java:1688)
When i looked in source codes:
(at line 128: Check.java)
if (group.hasRawInput()){
final String[] input = group.getInputAsArray();
for (int i = 0; i < input.length; i++)
"group.getInputAsArray()" returns "null" value, because the page has been
refreshed but none of checkboxes are checked.
So my suggestion is that just override these 2 methods of FormComponent in
CheckGroup as below;
/**
* OVERRIDEN OF FormComponent! (K.GUMUS/NxmBogazici)
*/
public String[] getInputAsArray()
{
String[] values = getRequest().getParameters(getInputName());
if (!isInputNullable())
{
if (values != null && values.length == 1 && values[0] == null)
{
return EMPTY_STRING_ARRAY;
}
else if (values == null)
{
return ZERO_STRING_ARRAY; //new String[0]
}
}
return values;
}
/**
* OVERRIDEN OF FormComponent! (K.GUMUS/NxmBogazici)
*/
public boolean isInputNullable()
{
return false;
}
What do you think? am i right? May i enter a JIRA issue?
Regards
Kadir
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