org.apache.lucene.queryParser.standard.processors

Class GroupQueryNodeProcessor

java.lang.Object

org.apache.lucene.queryParser.standard.processors.GroupQueryNodeProcessor

All Implemented Interfaces:

QueryNodeProcessor

public class GroupQueryNodeProcessor
extends Object
implements QueryNodeProcessor

The SyntaxParser generates query node trees that consider the boolean operator precedence, but Lucene current syntax does not support boolean precedence, so this processor remove all the precedence and apply the equivalent modifier according to the boolean operation defined on an specific query node.

If there is a GroupQueryNode in the query node tree, the query node tree is not merged with the one above it. Example: TODO: describe a good example to show how this processor works

See Also:

StandardQueryConfigHandler

Constructor Summary

Constructors

Constructor and Description
GroupQueryNodeProcessor()

Method Summary

Methods

Modifier and Type	Method and 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.

Methods inherited from class java.lang.Object

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

Constructor Detail

GroupQueryNodeProcessor

public GroupQueryNodeProcessor()

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

Parameters:

queryTree - tree root node

Returns:

the processed query tree

Throws:

QueryNodeException

getQueryConfigHandler

public QueryConfigHandler getQueryConfigHandler()

Description copied from interface: QueryNodeProcessor

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

Specified by:

getQueryConfigHandler in interface QueryNodeProcessor

Returns:

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

setQueryConfigHandler

public void setQueryConfigHandler(QueryConfigHandler queryConfigHandler)

Description copied from interface: QueryNodeProcessor

Sets the QueryConfigHandler associated to the query tree.

Specified by:

setQueryConfigHandler in interface QueryNodeProcessor