Class ChineseFilter
- java.lang.Object
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- org.apache.lucene.util.AttributeSource
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- org.apache.lucene.analysis.TokenStream
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- org.apache.lucene.analysis.TokenFilter
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- org.apache.lucene.analysis.cn.ChineseFilter
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- All Implemented Interfaces:
Closeable
,AutoCloseable
@Deprecated public final class ChineseFilter extends TokenFilter
Deprecated.(3.1) UseStopFilter
instead, which has the same functionality. This filter will be removed in Lucene 5.0ATokenFilter
with a stop word table.- Numeric tokens are removed.
- English tokens must be larger than 1 character.
- One Chinese character as one Chinese word.
- Add Chinese stop words, such as
- Dictionary based Chinese word extraction
- Intelligent Chinese word extraction
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource
AttributeSource.AttributeFactory, AttributeSource.State
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Field Summary
Fields Modifier and Type Field Description static String[]
STOP_WORDS
Deprecated.
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Constructor Summary
Constructors Constructor Description ChineseFilter(TokenStream in)
Deprecated.
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description boolean
incrementToken()
Deprecated.Consumers (i.e.,IndexWriter
) use this method to advance the stream to the next token.-
Methods inherited from class org.apache.lucene.analysis.TokenFilter
close, end, reset
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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
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Field Detail
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STOP_WORDS
public static final String[] STOP_WORDS
Deprecated.
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Constructor Detail
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ChineseFilter
public ChineseFilter(TokenStream in)
Deprecated.
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Method Detail
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incrementToken
public boolean incrementToken() throws IOException
Deprecated.Description copied from class:TokenStream
Consumers (i.e.,IndexWriter
) use this method to advance the stream to the next token. Implementing classes must implement this method and update the appropriateAttributeImpl
s with the attributes of the next token.The producer must make no assumptions about the attributes after the method has been returned: the caller may arbitrarily change it. If the producer needs to preserve the state for subsequent calls, it can use
AttributeSource.captureState()
to create a copy of the current attribute state.This method is called for every token of a document, so an efficient implementation is crucial for good performance. To avoid calls to
AttributeSource.addAttribute(Class)
andAttributeSource.getAttribute(Class)
, references to allAttributeImpl
s that this stream uses should be retrieved during instantiation.To ensure that filters and consumers know which attributes are available, the attributes must be added during instantiation. Filters and consumers are not required to check for availability of attributes in
TokenStream.incrementToken()
.- Specified by:
incrementToken
in classTokenStream
- Returns:
- false for end of stream; true otherwise
- Throws:
IOException
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