org.apache.lucene.analysis.icu
Class ICUNormalizer2Filter

java.lang.Object
  extended by org.apache.lucene.util.AttributeSource
      extended by org.apache.lucene.analysis.TokenStream
          extended by org.apache.lucene.analysis.TokenFilter
              extended by org.apache.lucene.analysis.icu.ICUNormalizer2Filter
All Implemented Interfaces:
Closeable
Direct Known Subclasses:
ICUFoldingFilter

public class ICUNormalizer2Filter
extends org.apache.lucene.analysis.TokenFilter

Normalize token text with ICU's Normalizer2

With this filter, you can normalize text in the following ways:

If you use the defaults, this filter is a simple way to standardize Unicode text in a language-independent way for search:

See Also:
Normalizer2, FilteredNormalizer2

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource
org.apache.lucene.util.AttributeSource.AttributeFactory, org.apache.lucene.util.AttributeSource.State
 
Field Summary
 
Fields inherited from class org.apache.lucene.analysis.TokenFilter
input
 
Constructor Summary
ICUNormalizer2Filter(org.apache.lucene.analysis.TokenStream input)
          Create a new Normalizer2Filter that combines NFKC normalization, Case Folding, and removes Default Ignorables (NFKC_Casefold)
ICUNormalizer2Filter(org.apache.lucene.analysis.TokenStream input, com.ibm.icu.text.Normalizer2 normalizer)
          Create a new Normalizer2Filter with the specified Normalizer2
 
Method Summary
 boolean incrementToken()
           
 
Methods inherited from class org.apache.lucene.analysis.TokenFilter
close, end, reset
 
Methods inherited from class org.apache.lucene.util.AttributeSource
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ICUNormalizer2Filter

public ICUNormalizer2Filter(org.apache.lucene.analysis.TokenStream input)
Create a new Normalizer2Filter that combines NFKC normalization, Case Folding, and removes Default Ignorables (NFKC_Casefold)


ICUNormalizer2Filter

public ICUNormalizer2Filter(org.apache.lucene.analysis.TokenStream input,
                            com.ibm.icu.text.Normalizer2 normalizer)
Create a new Normalizer2Filter with the specified Normalizer2

Parameters:
input - stream
normalizer - normalizer to use
Method Detail

incrementToken

public final boolean incrementToken()
                             throws IOException
Specified by:
incrementToken in class org.apache.lucene.analysis.TokenStream
Throws:
IOException


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