org.apache.solr.analysis

Class LowerCaseTokenizer

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.Tokenizer

org.apache.solr.analysis.LowerCaseTokenizer

All Implemented Interfaces:

Closeable, AutoCloseable

Deprecated.

Use LetterTokenizer and LowerCaseFilter

@Deprecated
public final class LowerCaseTokenizer
extends Tokenizer

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

Note: this does a decent job for most European languages, but does a terrible job for some Asian languages, where words are not separated by spaces.

Nested Class Summary

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

AttributeSource.State

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_MAX_WORD_LEN Deprecated.

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

input

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

DEFAULT_TOKEN_ATTRIBUTE_FACTORY

Constructor Summary

Constructors

Constructor and Description
LowerCaseTokenizer() Deprecated. Construct a new LowerCaseTokenizer.
LowerCaseTokenizer(AttributeFactory factory) Deprecated. Construct a new LowerCaseTokenizer using a given AttributeFactory.
LowerCaseTokenizer(AttributeFactory factory, int maxTokenLen) Deprecated. Construct a new LowerCaseTokenizer using a given AttributeFactory.

Method Summary

Modifier and Type	Method and Description
void	end() Deprecated.
boolean	incrementToken() Deprecated.
void	reset() Deprecated.

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, endAttributes, 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

Field Detail

DEFAULT_MAX_WORD_LEN

public static final int DEFAULT_MAX_WORD_LEN

Deprecated.

See Also:

Constant Field Values

Constructor Detail

LowerCaseTokenizer

public LowerCaseTokenizer()

Deprecated.

Construct a new LowerCaseTokenizer.

LowerCaseTokenizer

public LowerCaseTokenizer(AttributeFactory factory)

Deprecated.

Construct a new LowerCaseTokenizer using a given AttributeFactory.

Parameters:

factory - the attribute factory to use for this Tokenizer

LowerCaseTokenizer

public LowerCaseTokenizer(AttributeFactory factory,
                          int maxTokenLen)

Deprecated.

Construct a new LowerCaseTokenizer using a given AttributeFactory.

Parameters:

factory - the attribute factory to use for this Tokenizer

maxTokenLen - maximum token length the tokenizer will emit. Must be greater than 0 and less than MAX_TOKEN_LENGTH_LIMIT (1024*1024)

Throws:

IllegalArgumentException - if maxTokenLen is invalid.

Method Detail

incrementToken

public final boolean incrementToken()
                             throws IOException

Deprecated.

Specified by:

incrementToken in class TokenStream

Throws:

IOException

end

public final void end()
               throws IOException

Deprecated.

Overrides:

end in class TokenStream

Throws:

IOException

reset

public void reset()
           throws IOException

Deprecated.

Overrides:

reset in class Tokenizer

Throws:

IOException