nullvalue when using CheckGroup and a Validator
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Key: WICKET-486
URL: https://issues.apache.org/jira/browse/WICKET-486
Project: Wicket
Issue Type: Bug
Components: wicket
Affects Versions: 1.2.5
Environment: tomcat 5.5, java 1.5
Reporter: Ivana Cace
Problem occurs when using a listView with a checkgroup in the same form with a
input Validator. When the Validator detects invalid input *and* no items from
the CheckGroup were selected, Wicket throws a NullPointer Exception on the
first ListView item.
Specifically, in the Check class, the group.getInputAsArray() returns null and
causes the NPE:
if (group.hasRawInput()) {
final String[] input = group.getInputAsArray();
for (int i = 0; i < input.length; i++)
{ ....
The problem is solved by overriding the isNullable() method for CheckGroup to
return false.
@Override
public boolean isInputNullable() {
return false;
}
Apologies for describing symptoms rather than mechanism. More experienced
programmers in the office think the model for CheckGroup is not attached or
detached properly when used in conjunction with the (Pattern)Validator.
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