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

Class AllowLeadingWildcardProcessor

java.lang.Object

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

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

All Implemented Interfaces:

QueryNodeProcessor

public class AllowLeadingWildcardProcessor
extends QueryNodeProcessorImpl

This processor verifies if StandardQueryConfigHandler.ConfigurationKeys.ALLOW_LEADING_WILDCARD is defined in the QueryConfigHandler. If it is and leading wildcard is not allowed, it looks for every WildcardQueryNode contained in the query node tree and throws an exception if any of them has a leading wildcard ('*' or '?').

See Also:

StandardQueryConfigHandler.ConfigurationKeys.ALLOW_LEADING_WILDCARD

Constructor Summary

Constructors

Constructor and Description
AllowLeadingWildcardProcessor()

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

AllowLeadingWildcardProcessor

public AllowLeadingWildcardProcessor()

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