protected override IQueryNode PostProcessNode(IQueryNode node)
{
// the old Lucene Parser ignores FuzzyQueryNode that are also PrefixWildcardQueryNode or WildcardQueryNode
// we do the same here, also ignore empty terms
if (node is FieldQueryNode || node is FuzzyQueryNode)
{
FieldQueryNode fqn = (FieldQueryNode)node;
string text = fqn.Text.ToString();
// do not process wildcards for TermRangeQueryNode children and
// QuotedFieldQueryNode to reproduce the old parser behavior
if (fqn.Parent is TermRangeQueryNode
|| fqn is QuotedFieldQueryNode
|| text.Length <= 0)
{
// Ignore empty terms
return node;
}
// Code below simulates the old lucene parser behavior for wildcards
if (IsPrefixWildcard(text))
{
PrefixWildcardQueryNode prefixWildcardQN = new PrefixWildcardQueryNode(fqn);
return prefixWildcardQN;
}
else if (IsWildcard(text))
{
WildcardQueryNode wildcardQN = new WildcardQueryNode(fqn);
return wildcardQN;
}
}
return node;
}
public override IQueryNode CloneTree()
{
WildcardQueryNode clone = (WildcardQueryNode)base.CloneTree();
// nothing to do here
return(clone);
}