Class ParserExtension

This class represents an extension base class to the Lucene standard QueryParser. The QueryParser is generated by the JavaCC parser generator. Changing or adding functionality or syntax in the standard query parser requires changes to the JavaCC source file. To enable extending the standard query parser without changing the JavaCC sources and re-generate the parser the ParserExtension can be customized and plugged into an instance of ExtendableQueryParser, a direct subclass of QueryParser.

Inheritance

System.Object

ParserExtension

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: Lucene.Net.QueryParsers.Ext

Assembly: Lucene.Net.QueryParser.dll

Syntax

public abstract class ParserExtension

Methods

Parse(ExtensionQuery)

Processes the given ExtensionQuery and returns a corresponding Lucene.Net.Search.Query instance. Subclasses must either return a Lucene.Net.Search.Query instance or raise a ParseException. This method must not return null.

Declaration

public abstract Query Parse(ExtensionQuery query)

Parameters

Type	Name	Description
ExtensionQuery	query	the extension query

Returns

Type	Description
Lucene.Net.Search.Query	a new query instance

Exceptions

Type	Condition
ParseException	if the query can not be parsed.

See Also

Extensions

ExtendableQueryParser