s:iterator fails to iterate over collections containing null
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Key: WW-3010
URL: https://issues.apache.org/struts/browse/WW-3010
Project: Struts 2
Issue Type: Bug
Affects Versions: 2.0.14
Environment: any
Reporter: Daniel Baldes
When using the struts2 taglib's iterator tag to iterate over a collection which
contains nulls, the current value ("id") is not set to null, but to the value
it had in the last iteration before. This behaviour is explicitly coded without
any obvious reason. See IteratorComponent.java from line 219:
if ((id != null) && (currentValue != null)) {
//pageContext.setAttribute(id, currentValue);
//pageContext.setAttribute(id, currentValue,
PageContext.REQUEST_SCOPE);
stack.getContext().put(id, currentValue);
}
Expected behaviour: just iterate over the null values as a plain java iterator
would.
If nulls are forbidden for some important reason, it should throw an execption,
but not return a wrong value.
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