org.apache.lucene.analysis.miscellaneous

Class ProtectedTermFilterFactory

java.lang.Object

org.apache.lucene.analysis.util.AbstractAnalysisFactory

org.apache.lucene.analysis.util.TokenFilterFactory

org.apache.lucene.analysis.miscellaneous.ConditionalTokenFilterFactory

org.apache.lucene.analysis.miscellaneous.ProtectedTermFilterFactory

All Implemented Interfaces:

ResourceLoaderAware

public class ProtectedTermFilterFactory
extends ConditionalTokenFilterFactory
implements ResourceLoaderAware

Factory for a ProtectedTermFilter

CustomAnalyzer example:

 Analyzer ana = CustomAnalyzer.builder()
   .withTokenizer("standard")
   .when("protectedterm", "ignoreCase", "true", "protected", "protectedTerms.txt")
     .addTokenFilter("truncate", "prefixLength", "4")
     .addTokenFilter("lowercase")
   .endwhen()
   .build();
 

Solr example, in which conditional filters are specified via the wrappedFilters parameter - a comma-separated list of case-insensitive TokenFilter SPI names - and conditional filter args are specified via filterName.argName parameters:

 <fieldType name="reverse_lower_with_exceptions" class="solr.TextField" positionIncrementGap="100">
   <analyzer>
     <tokenizer class="solr.WhitespaceTokenizerFactory"/>
     <filter class="solr.ProtectedTermFilterFactory" ignoreCase="true" protected="protectedTerms.txt"
             wrappedFilters="truncate,lowercase" truncate.prefixLength="4" />
   </analyzer>
 </fieldType>

When using the wrappedFilters parameter, each filter name must be unique, so if you need to specify the same filter more than once, you must add case-insensitive unique '-id' suffixes (note that the '-id' suffix is stripped prior to SPI lookup), e.g.:

 <fieldType name="double_synonym_with_exceptions" class="solr.TextField" positionIncrementGap="100">
   <analyzer>
     <tokenizer class="solr.WhitespaceTokenizerFactory"/>
     <filter class="solr.ProtectedTermFilterFactory" ignoreCase="true" protected="protectedTerms.txt"
             wrappedFilters="synonymgraph-A,synonymgraph-B"
             synonymgraph-A.synonyms="synonyms-1.txt"
             synonymgraph-B.synonyms="synonyms-2.txt"/>
   </analyzer>
 </fieldType>

See related CustomAnalyzer.Builder.whenTerm(Predicate)

Since:

7.4.0

Field Summary

Fields

Modifier and Type	Field and Description
static char	FILTER_ARG_SEPARATOR
static char	FILTER_NAME_ID_SEPARATOR
static String	PROTECTED_TERMS

Fields inherited from class org.apache.lucene.analysis.util.AbstractAnalysisFactory

LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion

Constructor Summary

Constructors

Constructor and Description
ProtectedTermFilterFactory(Map<String,String> args)

Method Summary

Modifier and Type	Method and Description
protected ConditionalTokenFilter	create(TokenStream input, Function<TokenStream,TokenStream> inner) Modify the incoming TokenStream with a ConditionalTokenFilter
void	doInform(ResourceLoader loader) Initialises this component with the corresponding ResourceLoader
CharArraySet	getProtectedTerms()
boolean	isIgnoreCase()

Methods inherited from class org.apache.lucene.analysis.miscellaneous.ConditionalTokenFilterFactory

create, inform, setInnerFilters

Methods inherited from class org.apache.lucene.analysis.util.TokenFilterFactory

availableTokenFilters, forName, lookupClass, normalize, reloadTokenFilters

Methods inherited from class org.apache.lucene.analysis.util.AbstractAnalysisFactory

get, get, get, get, get, getBoolean, getChar, getClassArg, getFloat, getInt, getLines, getLuceneMatchVersion, getOriginalArgs, getPattern, getSet, getSnowballWordSet, getWordSet, isExplicitLuceneMatchVersion, require, require, require, requireBoolean, requireChar, requireFloat, requireInt, setExplicitLuceneMatchVersion, splitAt, splitFileNames

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.analysis.util.ResourceLoaderAware

inform

Field Detail

PROTECTED_TERMS

public static final String PROTECTED_TERMS

See Also:

Constant Field Values

FILTER_ARG_SEPARATOR

public static final char FILTER_ARG_SEPARATOR

See Also:

Constant Field Values

FILTER_NAME_ID_SEPARATOR

public static final char FILTER_NAME_ID_SEPARATOR

See Also:

Constant Field Values

Constructor Detail

ProtectedTermFilterFactory

public ProtectedTermFilterFactory(Map<String,String> args)

Method Detail

isIgnoreCase

public boolean isIgnoreCase()

getProtectedTerms

public CharArraySet getProtectedTerms()

create

protected ConditionalTokenFilter create(TokenStream input,
                                        Function<TokenStream,TokenStream> inner)

Description copied from class: ConditionalTokenFilterFactory

Modify the incoming TokenStream with a ConditionalTokenFilter

Specified by:

create in class ConditionalTokenFilterFactory

doInform

public void doInform(ResourceLoader loader)
              throws IOException

Description copied from class: ConditionalTokenFilterFactory

Initialises this component with the corresponding ResourceLoader

Overrides:

doInform in class ConditionalTokenFilterFactory

Throws:

IOException