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);
}
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 virtual Query Build(IQueryNode queryNode)
{
PrefixWildcardQueryNode wildcardNode = (PrefixWildcardQueryNode)queryNode;
string text = wildcardNode.Text.SubSequence(0, wildcardNode.Text.Length - 1).ToString();
PrefixQuery q = new PrefixQuery(new Term(wildcardNode.GetFieldAsString(), text));
MultiTermQuery.RewriteMethod method = (MultiTermQuery.RewriteMethod)queryNode.GetTag(MultiTermRewriteMethodProcessor.TAG_ID);
if (method != null)
{
q.MultiTermRewriteMethod = method;
}
return(q);
}
