com.yahoo.search.querytransform

Class AllLowercasingSearcher

java.lang.Object

com.yahoo.component.AbstractComponent

com.yahoo.component.chain.ChainedComponent

com.yahoo.processing.Processor

com.yahoo.search.Searcher

com.yahoo.search.querytransform.LowercasingSearcher

com.yahoo.search.querytransform.AllLowercasingSearcher

All Implemented Interfaces:

com.yahoo.component.Component, Comparable<com.yahoo.component.Component>

public class AllLowercasingSearcher
extends LowercasingSearcher

Transform all terms in the incoming query tree and highlight terms to lower case. This searcher is a compatibility layer for customers needing to use FSAs created for pre-5.1 systems.

Add this searcher to your search chain before any searcher running case-dependent automata with only lowercased contents, query transformers assuming lowercased input etc. Refer to the Vespa documentation on search chains and search chain ordering.

Author:

Steinar Knutsen

Field Summary

Fields inherited from class com.yahoo.component.AbstractComponent

isDeconstructable

Constructor Summary

Constructors

Constructor and Description
AllLowercasingSearcher()

Method Summary

Modifier and Type	Method and Description
boolean	shouldLowercase(WordItem word, IndexFacts.Session settings) Override this to control whether a given term should be lowercased.

Methods inherited from class com.yahoo.search.querytransform.LowercasingSearcher

search

Methods inherited from class com.yahoo.search.Searcher

ensureFilled, fill, getLogger, process, toString

Methods inherited from class com.yahoo.component.chain.ChainedComponent

getAnnotatedDependencies, getDefaultAnnotatedDependencies, getDependencies, initDependencies

Methods inherited from class com.yahoo.component.AbstractComponent

clone, compareTo, deconstruct, getClassName, getId, getIdString, hasInitializedId, initId, isDeconstructable, setIsDeconstructable

Methods inherited from class java.lang.Object

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

Constructor Detail

AllLowercasingSearcher

public AllLowercasingSearcher()

Method Detail

shouldLowercase

public boolean shouldLowercase(WordItem word,
                               IndexFacts.Session settings)

Description copied from class: LowercasingSearcher

Override this to control whether a given term should be lowercased.

Specified by:

shouldLowercase in class LowercasingSearcher

Parameters:

word - a WordItem or subclass thereof which is a candidate for lowercasing

Returns:

whether to convert the term to lower case