org.apache.lucene.analysis.util
Class CharFilterFactory

java.lang.Object
  org.apache.lucene.analysis.util.AbstractAnalysisFactory
      org.apache.lucene.analysis.util.CharFilterFactory

Direct Known Subclasses:

HTMLStripCharFilterFactory, MappingCharFilterFactory, PatternReplaceCharFilterFactory, PersianCharFilterFactory

public abstract class CharFilterFactory
extends AbstractAnalysisFactory

Abstract parent class for analysis factories that create CharFilter instances.

Field Summary

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

LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion

Constructor Summary

protected

CharFilterFactory(Map<String,String> args) Initialize this factory via a set of key-value pairs.

Method Summary

static Set<String>	availableCharFilters() returns a list of all available charfilter names
abstract Reader	create(Reader input) Wraps the given Reader with a CharFilter.
static CharFilterFactory	forName(String name, Map<String,String> args) looks up a charfilter by name from context classpath
static Class<? extends CharFilterFactory>	lookupClass(String name) looks up a charfilter class by name from context classpath
static void	reloadCharFilters(ClassLoader classloader) Reloads the factory list from the given ClassLoader.

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

assureMatchVersion, 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, splitFileNames

Methods inherited from class java.lang.Object

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

Constructor Detail

CharFilterFactory

protected CharFilterFactory(Map<String,String> args)

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

Method Detail

forName

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

looks up a charfilter by name from context classpath

lookupClass

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

looks up a charfilter class by name from context classpath

availableCharFilters

public static Set<String> availableCharFilters()

returns a list of all available charfilter names

reloadCharFilters

public static void reloadCharFilters(ClassLoader classloader)

Reloads the factory list from the given ClassLoader. Changes to the factories are visible after the method ends, all iterators (availableCharFilters(),...) 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 Reader create(Reader input)

Wraps the given Reader with a CharFilter.