org.apache.lucene.search.suggest.document

Class CompletionTokenStream

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.search.suggest.document.CompletionTokenStream

All Implemented Interfaces:

Closeable, AutoCloseable

public final class CompletionTokenStream
extends TokenStream

Token stream which converts a provided token stream to an automaton. The accepted strings enumeration from the automaton are available through the TermToBytesRefAttribute attribute The token stream uses a PayloadAttribute to store a completion's payload (see setPayload(org.apache.lucene.util.BytesRef))

WARNING: This API is experimental and might change in incompatible ways in the next release.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CompletionTokenStream.BytesRefBuilderTermAttribute Attribute providing access to the term builder and UTF-16 conversion
static class	CompletionTokenStream.BytesRefBuilderTermAttributeImpl Custom attribute implementation for completion token stream

Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

AttributeSource.State

Field Summary

Fields inherited from class org.apache.lucene.analysis.TokenStream

DEFAULT_TOKEN_ATTRIBUTE_FACTORY

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
void	end()
boolean	incrementToken()
void	reset()
void	setPayload(BytesRef payload) Sets a payload available throughout successive token stream enumeration
Automaton	toAutomaton() Converts the token stream to an automaton, treating the transition labels as utf-8
Automaton	toAutomaton(boolean unicodeAware) Converts the tokenStream to an automaton

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, removeAllAttributes, restoreState, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

setPayload

public void setPayload(BytesRef payload)

Sets a payload available throughout successive token stream enumeration

incrementToken

public boolean incrementToken()
                       throws IOException

Specified by:

incrementToken in class TokenStream

Throws:

IOException

end

public void end()
         throws IOException

Overrides:

end in class TokenStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class TokenStream

Throws:

IOException

reset

public void reset()
           throws IOException

Overrides:

reset in class TokenStream

Throws:

IOException

toAutomaton

public Automaton toAutomaton()
                      throws IOException

Converts the token stream to an automaton, treating the transition labels as utf-8

Throws:

IOException

toAutomaton

public Automaton toAutomaton(boolean unicodeAware)
                      throws IOException

Converts the tokenStream to an automaton

Throws:

IOException