org.basex.query.regex.parse

Class RegExLexer

java.lang.Object

org.basex.query.regex.parse.RegExLexer

All Implemented Interfaces:

RegExParserConstants, TokenManager

public class RegExLexer
extends java.lang.Object
implements TokenManager, RegExParserConstants

A simple lexer for XML Schema regular expressions.

Author:

BaseX Team 2005-12, BSD License, Leo Woerteler

Field Summary

Fields inherited from interface org.basex.query.regex.parse.RegExParserConstants

BACK_REF, BR_CLOSE, BR_OPEN, CAT_ESC, CHAR, COMMA, DIGIT, EOF, LINE_END, LINE_START, MULTI_ESC, NEG, NPAR_OPEN, NUMBER, OR, PAR_CLOSE, PAR_OPEN, PLUS, Q_MARK, QUANT_CLOSE, QUANT_OPEN, SINGLE_ESC, STAR, TO, tokenImage, WILDCARD

Constructor Summary

Constructors

Constructor and Description
RegExLexer(byte[] regex, boolean strip) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
Token	getNextToken() This gets the next token from the input stream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RegExLexer

public RegExLexer(byte[] regex,
          boolean strip)

Constructor.

Parameters:

regex - input string

strip - strip whitespace

Method Detail

getNextToken

public Token getNextToken()

Description copied from interface: TokenManager

This gets the next token from the input stream. A token of kind 0 (<EOF>) should be returned on EOF.

Specified by:

getNextToken in interface TokenManager

Returns:

the next token