Package org.apache.lucene.analysis

Class TokenFilterFactory

java.lang.Object

org.apache.lucene.analysis.AbstractAnalysisFactory

org.apache.lucene.analysis.TokenFilterFactory

public abstract class TokenFilterFactory
extends AbstractAnalysisFactory

Abstract parent class for analysis factories that create TokenFilter instances.

Since:

3.1

Field Summary

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

LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	TokenFilterFactory()	Default ctor for compatibility with SPI
protected	TokenFilterFactory(Map<String,String> args)	Initialize this factory via a set of key-value pairs.

Method Summary

Modifier and Type	Method	Description
static Set<String>	availableTokenFilters()	returns a list of all available tokenfilter names from context classpath
abstract TokenStream	create(TokenStream input)	Transform the specified input TokenStream
static String	findSPIName(Class<? extends TokenFilterFactory> serviceClass)	looks up a SPI name for the specified token filter factory
static TokenFilterFactory	forName(String name, Map<String,String> args)	looks up a tokenfilter by name from context classpath
static Class<? extends TokenFilterFactory>	lookupClass(String name)	looks up a tokenfilter class by name from context classpath
TokenStream	normalize(TokenStream input)	Normalize the specified input TokenStream While the default implementation returns input unchanged, filters that should be applied at normalization time can delegate to create method.
static void	reloadTokenFilters(ClassLoader classloader)	Reloads the factory list from the given ClassLoader.

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

defaultCtorException, 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

Constructor Details

TokenFilterFactory

protected TokenFilterFactory()

Default ctor for compatibility with SPI

TokenFilterFactory

protected TokenFilterFactory(Map<String,String> args)

Initialize this factory via a set of key-value pairs.

Method Details

forName

public static TokenFilterFactory forName(String name,
 Map<String,String> args)

looks up a tokenfilter by name from context classpath

lookupClass

public static Class<? extends TokenFilterFactory> lookupClass(String name)

looks up a tokenfilter class by name from context classpath

availableTokenFilters

public static Set<String> availableTokenFilters()

returns a list of all available tokenfilter names from context classpath

findSPIName

public static String findSPIName(Class<? extends TokenFilterFactory> serviceClass)

looks up a SPI name for the specified token filter factory

reloadTokenFilters

public static void reloadTokenFilters(ClassLoader classloader)

Reloads the factory list from the given ClassLoader. Changes to the factories are visible after the method ends, all iterators (availableTokenFilters(),...) stay consistent.

NOTE: Only new factories are added, existing ones are never removed or replaced.

This method is expensive and should only be called for discovery of new factories on the given classpath/classloader!

create

public abstract TokenStream create(TokenStream input)

Transform the specified input TokenStream

normalize

public TokenStream normalize(TokenStream input)

Normalize the specified input TokenStream While the default implementation returns input unchanged, filters that should be applied at normalization time can delegate to create method.