AttributeSource.AttributeFactory, AttributeSource.State
Constructor and Description |
---|
KeywordTokenizer(AttributeSource.AttributeFactory factory,
Reader input,
int bufferSize) |
KeywordTokenizer(AttributeSource source,
Reader input,
int bufferSize) |
KeywordTokenizer(Reader input) |
KeywordTokenizer(Reader input,
int bufferSize) |
Modifier and Type | Method and Description |
---|---|
void |
end()
This method is called by the consumer after the last token has been
consumed, after
TokenStream.incrementToken() returned false
(using the new TokenStream API). |
boolean |
incrementToken()
Consumers (i.e.,
IndexWriter ) use this method to advance the stream to
the next token. |
void |
reset(Reader input)
Expert: Reset the tokenizer to a new reader.
|
close, correctOffset
reset
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString
public KeywordTokenizer(Reader input)
public KeywordTokenizer(Reader input, int bufferSize)
public KeywordTokenizer(AttributeSource source, Reader input, int bufferSize)
public KeywordTokenizer(AttributeSource.AttributeFactory factory, Reader input, int bufferSize)
public final boolean incrementToken() throws IOException
TokenStream
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()
.
incrementToken
in class TokenStream
IOException
public final void end()
TokenStream
TokenStream.incrementToken()
returned false
(using the new TokenStream
API). Streams implementing the old API
should upgrade to use this feature.
This method can be used to perform any end-of-stream operations, such as
setting the final offset of a stream. The final offset of a stream might
differ from the offset of the last token eg in case one or more whitespaces
followed after the last token, but a WhitespaceTokenizer
was used.end
in class TokenStream
public void reset(Reader input) throws IOException
Tokenizer
reset
in class Tokenizer
IOException