Class MockGraphTokenFilter
- 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.LookaheadTokenFilter<LookaheadTokenFilter.Position>
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- org.apache.lucene.analysis.MockGraphTokenFilter
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- All Implemented Interfaces:
Closeable
,AutoCloseable
public final class MockGraphTokenFilter extends LookaheadTokenFilter<LookaheadTokenFilter.Position>
Randomly inserts overlapped (posInc=0) tokens with posLength sometimes > 1. The chain must have an OffsetAttribute.
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.lucene.analysis.LookaheadTokenFilter
LookaheadTokenFilter.Position
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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
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Fields inherited from class org.apache.lucene.analysis.LookaheadTokenFilter
end, inputPos, offsetAtt, outputPos, posIncAtt, positions, posLenAtt
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Fields inherited from class org.apache.lucene.analysis.TokenFilter
input
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Constructor Summary
Constructors Constructor Description MockGraphTokenFilter(Random random, TokenStream input)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected void
afterPosition()
This is called when all input tokens leaving a given position have been returned.boolean
incrementToken()
Consumers (i.e.,IndexWriter
) use this method to advance the stream to the next token.protected LookaheadTokenFilter.Position
newPosition()
void
reset()
Reset the filter as well as the input TokenStream.-
Methods inherited from class org.apache.lucene.analysis.LookaheadTokenFilter
insertToken, nextToken, peekToken
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Methods inherited from class org.apache.lucene.analysis.TokenFilter
close, end
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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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Constructor Detail
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MockGraphTokenFilter
public MockGraphTokenFilter(Random random, TokenStream input)
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Method Detail
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newPosition
protected LookaheadTokenFilter.Position newPosition()
- Specified by:
newPosition
in classLookaheadTokenFilter<LookaheadTokenFilter.Position>
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afterPosition
protected void afterPosition() throws IOException
Description copied from class:LookaheadTokenFilter
This is called when all input tokens leaving a given position have been returned. Override this and call createToken and then set whichever token's attributes you want, if you want to inject a token starting from this position.- Overrides:
afterPosition
in classLookaheadTokenFilter<LookaheadTokenFilter.Position>
- Throws:
IOException
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reset
public void reset() throws IOException
Description copied from class:TokenFilter
Reset the filter as well as the input TokenStream.- Overrides:
reset
in classLookaheadTokenFilter<LookaheadTokenFilter.Position>
- Throws:
IOException
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incrementToken
public boolean incrementToken() throws IOException
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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