[JXPATH-113] NullPointerException in ChildContext when document only contains an empty root node

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.4
• Assignee: Benedikt Ritter
• Reporter: Michele Vivoda
• Created: 23/Dec/07 17:38
• Updated: 24/Nov/15 18:16
• Resolved: 24/Nov/15 18:16

Description

In ChildContext I get a NullPointerException, the error appears in method prepare()

    iterator = (startFromParentLocation ? parent.getParent() : parent).childIterator(nodeTest,
                reverse, startFromParentLocation ? parent : null);

should be changed in my opinion to

final NodePointer actualParent = startFromParentLocation ? parent.getParent() : parent;
        iterator = actualParent==null ? null : actualParent.childIterator(nodeTest,
                reverse, startFromParentLocation ? parent : null);

The tests triggering the error are testIssue172_CountFollowingSiblingNode and testIssue172_CountPrecedingSiblingNode