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

Interface QueryNodeProcessor

All Known Implementing Classes:

AllowLeadingWildcardProcessor, AnalyzerQueryNodeProcessor, BooleanModifiersQueryNodeProcessor, BooleanQuery2ModifierNodeProcessor, BooleanSingleChildOptimizationQueryNodeProcessor, BoostQueryNodeProcessor, DefaultPhraseSlopQueryNodeProcessor, FuzzyQueryNodeProcessor, GroupQueryNodeProcessor, LowercaseExpandedTermsQueryNodeProcessor, MatchAllDocsQueryNodeProcessor, MultiFieldQueryNodeProcessor, MultiTermRewriteMethodProcessor, NoChildOptimizationQueryNodeProcessor, NumericQueryNodeProcessor, NumericRangeQueryNodeProcessor, OpenRangeQueryNodeProcessor, PhraseSlopQueryNodeProcessor, PrecedenceQueryNodeProcessorPipeline, QueryNodeProcessorImpl, QueryNodeProcessorPipeline, RemoveDeletedQueryNodesProcessor, RemoveEmptyNonLeafQueryNodeProcessor, StandardQueryNodeProcessorPipeline, TermRangeQueryNodeProcessor, WildcardQueryNodeProcessor

public interface QueryNodeProcessor

A QueryNodeProcessor is an interface for classes that process a QueryNode tree.

The implementor of this class should perform some operation on a query node tree and return the same or another query node tree.

It also may carry a QueryConfigHandler object that contains configuration about the query represented by the query tree or the collection/index where it's intended to be executed.

In case there is any QueryConfigHandler associated to the query tree to be processed, it should be set using setQueryConfigHandler(QueryConfigHandler) before process(QueryNode) is invoked.

See Also:

QueryNode, QueryNodeProcessor, QueryConfigHandler

Method Summary

Modifier and Type	Method	Description
QueryConfigHandler	getQueryConfigHandler()	Returns the QueryConfigHandler associated to the query tree if any, otherwise it returns null
QueryNode	process(QueryNode queryTree)	Processes a query node tree.
void	setQueryConfigHandler(QueryConfigHandler queryConfigHandler)	Sets the QueryConfigHandler associated to the query tree.

Method Detail

process

QueryNode process(QueryNode queryTree)
           throws QueryNodeException

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

Parameters:

queryTree - tree root node

Returns:

the processed query tree

Throws:

QueryNodeException

setQueryConfigHandler

void setQueryConfigHandler(QueryConfigHandler queryConfigHandler)

Sets the QueryConfigHandler associated to the query tree.

getQueryConfigHandler

QueryConfigHandler getQueryConfigHandler()

Returns the QueryConfigHandler associated to the query tree if any, otherwise it returns null

Returns:

the QueryConfigHandler associated to the query tree if any, otherwise it returns null