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java.lang.Object org.apache.lucene.util.AttributeSource org.apache.lucene.analysis.TokenStream org.apache.lucene.analysis.TokenFilter org.apache.lucene.analysis.icu.ICUNormalizer2Filter org.apache.lucene.analysis.icu.ICUFoldingFilter
public final class ICUFoldingFilter
A TokenFilter that applies search term folding to Unicode text, applying foldings from UTR#30 Character Foldings.
This filter applies the following foldings from the report to unicode text:
Additionally, Default Ignorables are removed, and text is normalized to NFKC. All foldings, case folding, and normalization mappings are applied recursively to ensure a fully folded and normalized result.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource |
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org.apache.lucene.util.AttributeSource.AttributeFactory, org.apache.lucene.util.AttributeSource.State |
Field Summary |
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Fields inherited from class org.apache.lucene.analysis.TokenFilter |
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input |
Constructor Summary | |
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ICUFoldingFilter(org.apache.lucene.analysis.TokenStream input)
Create a new ICUFoldingFilter on the specified input |
Method Summary |
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Methods inherited from class org.apache.lucene.analysis.icu.ICUNormalizer2Filter |
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incrementToken |
Methods inherited from class org.apache.lucene.analysis.TokenFilter |
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close, end, reset |
Methods inherited from class org.apache.lucene.util.AttributeSource |
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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 |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ICUFoldingFilter(org.apache.lucene.analysis.TokenStream input)
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