com.Ostermiller.Syntax.Lexer
Interface Lexer

All Known Implementing Classes:

CLexer, HTMLLexer, HTMLLexer1, JavaLexer, JavaScriptLexer, LatexLexer, PlainLexer, PropertiesLexer, SQLLexer

public interface Lexer

A lexer should implement this interface.

Method Summary

Token	getNextToken() Returns the next token.
void	reset(Reader reader, int yyline, int yychar, int yycolumn) Closes the current input stream, and resets the scanner to read from a new input stream.

Method Detail

getNextToken

Token getNextToken()
                   throws IOException

Returns the next token.

Returns:

the next token

Throws:

IOException

reset

void reset(Reader reader,
           int yyline,
           int yychar,
           int yycolumn)
           throws IOException

Closes the current input stream, and resets the scanner to read from a new input stream. All internal variables are reset, the old input stream cannot be reused (content of the internal buffer is discarded and lost). The lexical state is set to the initial state. Subsequent tokens read from the lexer will start with the line, char, and column values given here.

Parameters:

reader - The new input.

yyline - The line number of the first token.

yychar - The position (relative to the start of the stream) of the first token.

yycolumn - The position (relative to the line) of the first token.

Throws:

IOException - if an IOExecption occurs while switching readers.