com.bericotech.clavin.index

Class WhitespaceLowerCaseTokenizer

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.Tokenizer

org.apache.lucene.analysis.util.CharTokenizer

com.bericotech.clavin.index.WhitespaceLowerCaseTokenizer

All Implemented Interfaces:

Closeable, AutoCloseable

public class WhitespaceLowerCaseTokenizer
extends org.apache.lucene.analysis.util.CharTokenizer

LowerCaseTokenizer performs the function of WhitespaceTokenizer and LowerCaseFilter together. It divides text at whitespace and converts them to lower case. While it is functionally equivalent to a combination of WhitespaceTokenizer and LowerCaseFilter, there is a performance advantage to doing the two tasks at once, hence this (redundant) implementation.

Nested Class Summary

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

org.apache.lucene.util.AttributeSource.State

Field Summary

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

input

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

DEFAULT_TOKEN_ATTRIBUTE_FACTORY

Fields inherited from class org.apache.lucene.util.AttributeSource

DEFAULT_ATTRIBUTE_FACTORY

Constructor Summary

Constructors

Constructor and Description
WhitespaceLowerCaseTokenizer(org.apache.lucene.util.Version matchVersion, Reader in) Call the "super" constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	isTokenChar(int c) Collects only characters which do not satisfy Character.isWhitespace(int).
protected int	normalize(int c) Converts char to lower case Character.toLowerCase(int).

Methods inherited from class org.apache.lucene.analysis.util.CharTokenizer

end, incrementToken, reset

Methods inherited from class org.apache.lucene.analysis.Tokenizer

close, correctOffset, setReader

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

Methods inherited from class java.lang.Object

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

Constructor Detail

WhitespaceLowerCaseTokenizer

public WhitespaceLowerCaseTokenizer(org.apache.lucene.util.Version matchVersion,
                            Reader in)

Call the "super" constructor.

Parameters:

matchVersion - e.g., Version.LUCENE_4_9

in -

Method Detail

isTokenChar

protected boolean isTokenChar(int c)

Collects only characters which do not satisfy Character.isWhitespace(int).

Specified by:

isTokenChar in class org.apache.lucene.analysis.util.CharTokenizer

Parameters:

c - char being processed

normalize

protected int normalize(int c)

Converts char to lower case Character.toLowerCase(int).

Overrides:

normalize in class org.apache.lucene.analysis.util.CharTokenizer

Parameters:

c - char being processed