private static final class FeatureField.FeatureTokenStream extends TokenStream
AttributeSource.State
Modifier and Type | Field and Description |
---|---|
private int |
freq |
private TermFrequencyAttribute |
freqAttribute |
private CharTermAttribute |
termAttribute |
private boolean |
used |
private java.lang.String |
value |
DEFAULT_TOKEN_ATTRIBUTE_FACTORY
Modifier | Constructor and Description |
---|---|
private |
FeatureTokenStream() |
Modifier and Type | Method and Description |
---|---|
void |
close()
Releases resources associated with this stream.
|
boolean |
incrementToken()
Consumers (i.e.,
IndexWriter ) use this method to advance the stream to
the next token. |
void |
reset()
This method is called by a consumer before it begins consumption using
TokenStream.incrementToken() . |
(package private) void |
setValues(java.lang.String value,
int freq)
Sets the values
|
end
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, endAttributes, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, removeAllAttributes, restoreState, toString
private final CharTermAttribute termAttribute
private final TermFrequencyAttribute freqAttribute
private boolean used
private java.lang.String value
private int freq
void setValues(java.lang.String value, int freq)
public boolean incrementToken()
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
public void reset()
TokenStream
TokenStream.incrementToken()
.
Resets this stream to a clean state. Stateful implementations must implement this method so that they can be reused, just as if they had been created fresh.
If you override this method, always call super.reset()
, otherwise
some internal state will not be correctly reset (e.g., Tokenizer
will
throw IllegalStateException
on further usage).
reset
in class TokenStream
public void close()
TokenStream
If you override this method, always call super.close()
, otherwise
some internal state will not be correctly reset (e.g., Tokenizer
will
throw IllegalStateException
on reuse).
close
in interface java.io.Closeable
close
in interface java.lang.AutoCloseable
close
in class TokenStream