gr.forth.ics.vrp.corevrp.parser
Class Lexer

java.lang.Object
  |
  +--gr.forth.ics.vrp.corevrp.parser.Lexer

public class Lexer

extends Object

This class is a scanner generated by JFlex 1.3.5 on 05/12/02 09:54 from the specification file file:/C:/Dokumente und Einstellungen/Karsten Tolle/Eigene Dateien/Uni/RDF/VRP/Rdf_vrp/src/gr/forth/ics/vrp/corevrp/Cup_JFlex/lexer.jflex

Field Summary

static int	Attribute
static int	QName_Begin lexical states
static int	QName_End
static int	RDF_Attribute
static int	RDF_Attribute_IDSYMBOL
static int	RDF_QName_Begin
static int	RDF_QName_End
static int	RDF_YYINITIAL
static int	YYEOF This character denotes the end of file
static int	YYINITIAL

Constructor Summary

Lexer(InputStream in)
Creates a new scanner.

Lexer(Reader in)
Creates a new scanner There is also a java.io.InputStream version of this constructor.

Method Summary

java_cup.runtime.Symbol	next_token() Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.
void	setdebug(boolean b) For debugging - lexer will print the generated tokens and the tokentypes to a Output.
void	yybegin(int newState) Enters a new lexical state
char	yycharat(int pos) Returns the character at position pos from the matched text.
void	yyclose() Closes the input stream.
int	yylength() Returns the length of the matched text region.
void	yyreset(Reader reader) Closes the current stream, and resets the scanner to read from a new input stream.
int	yystate() Returns the current lexical state.
String	yytext() Returns the text matched by the current regular expression.

Methods inherited from class java.lang.Object

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

Field Detail

YYEOF

public static final int YYEOF

This character denotes the end of file

See Also:

Constant Field Values

QName_Begin

public static final int QName_Begin

lexical states

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Constant Field Values

Attribute

public static final int Attribute

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Constant Field Values

RDF_QName_End

public static final int RDF_QName_End

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Constant Field Values

RDF_Attribute

public static final int RDF_Attribute

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Constant Field Values

RDF_QName_Begin

public static final int RDF_QName_Begin

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Constant Field Values

RDF_Attribute_IDSYMBOL

public static final int RDF_Attribute_IDSYMBOL

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Constant Field Values

YYINITIAL

public static final int YYINITIAL

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Constant Field Values

QName_End

public static final int QName_End

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Constant Field Values

RDF_YYINITIAL

public static final int RDF_YYINITIAL

See Also:

Constant Field Values

Constructor Detail

Lexer

public Lexer(Reader in)

Creates a new scanner There is also a java.io.InputStream version of this constructor.

Parameters:

in - the java.io.Reader to read input from.

Lexer

public Lexer(InputStream in)

Creates a new scanner. There is also java.io.Reader version of this constructor.

Parameters:

in - the java.io.Inputstream to read input from.

Method Detail

setdebug

public void setdebug(boolean b)

For debugging - lexer will print the generated tokens and the tokentypes to a Output. The default setting is 'false'.

yyclose

public final void yyclose()
                   throws IOException

Closes the input stream.

IOException

yyreset

public final void yyreset(Reader reader)
                   throws IOException

Closes the current stream, and resets the scanner to read from a new input stream. All internal variables are reset, the old input stream cannot be reused (internal buffer is discarded and lost). Lexical state is set to YY_INITIAL.

Parameters:

reader - the new input stream

IOException

yystate

public final int yystate()

Returns the current lexical state.

yybegin

public final void yybegin(int newState)

Enters a new lexical state

Parameters:

newState - the new lexical state

yytext

public final String yytext()

Returns the text matched by the current regular expression.

yycharat

public final char yycharat(int pos)

Returns the character at position pos from the matched text. It is equivalent to yytext().charAt(pos), but faster

Parameters:

pos - the position of the character to fetch. A value from 0 to yylength()-1.

Returns:

the character at position pos

yylength

public final int yylength()

Returns the length of the matched text region.

next_token

public java_cup.runtime.Symbol next_token()
                                   throws IOException

Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.

Returns:

the next token

Throws:

IOException - if any I/O-Error occurs