Package org.apache.lucene.analysis.email

Class UAX29URLEmailTokenizer

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.Tokenizer

org.apache.lucene.analysis.email.UAX29URLEmailTokenizer

All Implemented Interfaces:

Closeable, AutoCloseable

public final class UAX29URLEmailTokenizer
extends Tokenizer

This class implements Word Break rules from the Unicode Text Segmentation algorithm, as specified in Unicode Standard Annex #29 URLs and email addresses are also tokenized according to the relevant RFCs.

Nested Class Summary

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

AttributeSource.State

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ALPHANUM	Alpha/numeric token type
static final int	EMAIL	Email token type
static final int	EMOJI	Emoji token type.
static final int	HANGUL	Hangul token type
static final int	HIRAGANA	Hiragana token type
static final int	IDEOGRAPHIC	Ideographic token type
static final int	KATAKANA	Katakana token type
static final int	MAX_TOKEN_LENGTH_LIMIT	Absolute maximum sized token
static final int	NUM	Numeric token type
static final int	SOUTHEAST_ASIAN	Southeast Asian token type
static final String[]	TOKEN_TYPES	String token types that correspond to token type int constants
static final int	URL	URL token type

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	Description
UAX29URLEmailTokenizer()	Creates a new instance of the UAX29URLEmailTokenizer.
UAX29URLEmailTokenizer(AttributeFactory factory)	Creates a new UAX29URLEmailTokenizer with a given AttributeFactory

Method Summary

Modifier and Type	Method	Description
void	close()
final void	end()
int	getMaxTokenLength()
final boolean	incrementToken()
void	reset()
void	setMaxTokenLength(int length)	Set the max allowed token length.

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

correctOffset, setReader, setReaderTestPoint

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 Details

ALPHANUM

public static final int ALPHANUM

Alpha/numeric token type

See Also:

• Constant Field Values

NUM

public static final int NUM

Numeric token type

See Also:

• Constant Field Values

SOUTHEAST_ASIAN

public static final int SOUTHEAST_ASIAN

Southeast Asian token type

See Also:

• Constant Field Values

IDEOGRAPHIC

public static final int IDEOGRAPHIC

Ideographic token type

See Also:

• Constant Field Values

HIRAGANA

public static final int HIRAGANA

Hiragana token type

See Also:

• Constant Field Values

KATAKANA

public static final int KATAKANA

Katakana token type

See Also:

• Constant Field Values

HANGUL

public static final int HANGUL

Hangul token type

See Also:

• Constant Field Values

URL

public static final int URL

URL token type

See Also:

• Constant Field Values

EMAIL

public static final int EMAIL

Email token type

See Also:

• Constant Field Values

EMOJI

public static final int EMOJI

Emoji token type.

See Also:

• Constant Field Values

TOKEN_TYPES

public static final String[] TOKEN_TYPES

String token types that correspond to token type int constants

MAX_TOKEN_LENGTH_LIMIT

public static final int MAX_TOKEN_LENGTH_LIMIT

Absolute maximum sized token

See Also:

• Constant Field Values

Constructor Details

UAX29URLEmailTokenizer

public UAX29URLEmailTokenizer()

Creates a new instance of the UAX29URLEmailTokenizer. Attaches the input to the newly created JFlex scanner.

UAX29URLEmailTokenizer

public UAX29URLEmailTokenizer(AttributeFactory factory)

Creates a new UAX29URLEmailTokenizer with a given AttributeFactory

Method Details

setMaxTokenLength

public void setMaxTokenLength(int length)

Set the max allowed token length. Tokens larger than this will be chopped up at this token length and emitted as multiple tokens. If you need to skip such large tokens, you could increase this max length, and then use LengthFilter to remove long tokens. The default is UAX29URLEmailAnalyzer.DEFAULT_MAX_TOKEN_LENGTH.

Throws:

IllegalArgumentException - if the given length is outside of the range [1, 1048576].

getMaxTokenLength

public int getMaxTokenLength()

See Also:

• setMaxTokenLength(int)

incrementToken

public final boolean incrementToken()
                             throws IOException

Specified by:

incrementToken in class TokenStream

Throws:

IOException

end

public final void end()
               throws IOException

Overrides:

end in class TokenStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class Tokenizer

Throws:

IOException

reset

public void reset()
           throws IOException

Overrides:

reset in class Tokenizer

Throws:

IOException