Lucene.Net.QueryParsers.QueryParser.GetWildcardQuery C# (CSharp) Method

QueryParser Class Documentation Mostrar archivo Open project: synhershko/lucene.net

GetWildcardQuery() protected method

Factory method for generating a query. Called when parser parses an input term token that contains one or more wildcard characters (? and *), but is not a prefix term token (one that has just a single * character at the end)

Depending on settings, prefix term may be lower-cased automatically. It will not go through the default Analyzer, however, since normal Analyzers are unlikely to work properly with wildcard templates.

Can be overridden by extending classes, to provide custom handling for wildcard queries, which may be necessary due to missing analyzer calls.

throw in overridden method to disallow ///

protected GetWildcardQuery ( String field, String termStr ) : Query
field	String	Name of the field query will use. ///
termStr	String	Term token that contains one or more wild card /// characters (? or *), but is not simple prefix term /// ///
return	Lucene.Net.Search.Query

        protected internal virtual Query GetWildcardQuery(String field, String termStr)
        {
            if ("*".Equals(field))
            {
                if ("*".Equals(termStr)) return NewMatchAllDocsQuery();
            }
            if (!allowLeadingWildcard && (termStr.StartsWith("*") || termStr.StartsWith("?")))
                throw new ParseException("'*' or '?' not allowed as first character in WildcardQuery");
            if (lowercaseExpandedTerms)
            {
                termStr = termStr.ToLower();
            }
            Term t = new Term(field, termStr);
            return NewWildcardQuery(t);
        }

QueryParser

AddClause

Clause

Conjunction

Disable_tracing

DiscardEscapeChar

Enable_tracing

Escape

GenerateParseException

GetBooleanQuery

GetFieldQuery

GetFuzzyQuery