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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.ICUTransformFilter
public final class ICUTransformFilter
A TokenFilter
that transforms text with ICU.
ICU provides text-transformation functionality via its Transliteration API. Although script conversion is its most common use, a Transliterator can actually perform a more general class of tasks. In fact, Transliterator defines a very general API which specifies only that a segment of the input text is replaced by new text. The particulars of this conversion are determined entirely by subclasses of Transliterator.
Some useful transformations for search are built-in:
Example usage:
stream = new ICUTransformFilter(stream, Transliterator.getInstance("Traditional-Simplified"));For more details, see the ICU User Guide.
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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ICUTransformFilter(org.apache.lucene.analysis.TokenStream input,
com.ibm.icu.text.Transliterator transform)
Create a new ICUTransformFilter that transforms text on the given stream. |
Method Summary | |
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boolean |
incrementToken()
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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 ICUTransformFilter(org.apache.lucene.analysis.TokenStream input, com.ibm.icu.text.Transliterator transform)
input
- TokenStream
to filter.transform
- Transliterator to transform the text.Method Detail |
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public boolean incrementToken() throws IOException
incrementToken
in class org.apache.lucene.analysis.TokenStream
IOException
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