org.apache.lucene.queryparser.flexible.standard.processors

Class AnalyzerQueryNodeProcessor

java.lang.Object

org.apache.lucene.queryparser.flexible.core.processors.QueryNodeProcessorImpl

org.apache.lucene.queryparser.flexible.standard.processors.AnalyzerQueryNodeProcessor

All Implemented Interfaces:

QueryNodeProcessor

public class AnalyzerQueryNodeProcessor
extends QueryNodeProcessorImpl

This processor verifies if StandardQueryConfigHandler.ConfigurationKeys.ANALYZER is defined in the QueryConfigHandler. If it is and the analyzer is not null, it looks for every FieldQueryNode that is not WildcardQueryNode, FuzzyQueryNode or RangeQueryNode contained in the query node tree, then it applies the analyzer to that FieldQueryNode object.

If the analyzer return only one term, the returned term is set to the FieldQueryNode and it's returned.

If the analyzer return more than one term, a TokenizedPhraseQueryNode or MultiPhraseQueryNode is created, whether there is one or more terms at the same position, and it's returned.

If no term is returned by the analyzer a NoTokenFoundQueryNode object is returned.

See Also:

StandardQueryConfigHandler.ConfigurationKeys.ANALYZER, Analyzer, TokenStream

Constructor Summary

Constructors

Constructor and Description
AnalyzerQueryNodeProcessor()

Method Summary

Modifier and Type	Method and Description
QueryNode	process(QueryNode queryTree) Processes a query node tree.

Methods inherited from class org.apache.lucene.queryparser.flexible.core.processors.QueryNodeProcessorImpl

getQueryConfigHandler, setQueryConfigHandler

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AnalyzerQueryNodeProcessor

public AnalyzerQueryNodeProcessor()

Method Detail

process

public QueryNode process(QueryNode queryTree)
                  throws QueryNodeException

Description copied from interface: QueryNodeProcessor

Processes a query node tree. It may return the same or another query tree. I should never return null.

Specified by:

process in interface QueryNodeProcessor

Overrides:

process in class QueryNodeProcessorImpl

Parameters:

queryTree - tree root node

Returns:

the processed query tree

Throws:

QueryNodeException