org.apache.lucene.analysis
Class MockGraphTokenFilter
java.lang.Object
org.apache.lucene.util.AttributeSource
org.apache.lucene.analysis.TokenStream
org.apache.lucene.analysis.TokenFilter
org.apache.lucene.analysis.LookaheadTokenFilter<LookaheadTokenFilter.Position>
org.apache.lucene.analysis.MockGraphTokenFilter
- All Implemented Interfaces:
- Closeable
public final class MockGraphTokenFilter
- extends LookaheadTokenFilter<LookaheadTokenFilter.Position>
Randomly inserts overlapped (posInc=0) tokens with
posLength sometimes > 1. The chain must have
an OffsetAttribute.
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 |
MockGraphTokenFilter
public MockGraphTokenFilter(Random random,
TokenStream input)
newPosition
protected LookaheadTokenFilter.Position newPosition()
- Specified by:
newPosition
in class LookaheadTokenFilter<LookaheadTokenFilter.Position>
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 class LookaheadTokenFilter<LookaheadTokenFilter.Position>
- Throws:
IOException
reset
public void reset()
throws IOException
- Description copied from class:
TokenFilter
- Reset the filter as well as the input TokenStream.
- Overrides:
reset
in class LookaheadTokenFilter<LookaheadTokenFilter.Position>
- Throws:
IOException
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 appropriate AttributeImpl
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)
and AttributeSource.getAttribute(Class)
,
references to all AttributeImpl
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 class TokenStream
- Returns:
- false for end of stream; true otherwise
- Throws:
IOException
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