org.ablaf.internal.lexer
Class AbstractLexerSource

java.lang.Object
  org.ablaf.internal.lexer.AbstractLexerSource

All Implemented Interfaces:

ILexerSource

Direct Known Subclasses:

ReaderLexerSource

public abstract class AbstractLexerSource

extends java.lang.Object

implements ILexerSource

An abstract implementation of an ILexerSource.

Version:

$Revision: 1.7 $

Author:

jpetersen

Constructor Summary

protected

AbstractLexerSource(java.lang.String sourceName)

Method Summary

char	getLastRead()
int	getLine()
int	getOffset() Return the count of read characters.
java.lang.String	getSourceName() Return the name of the source.
protected abstract char	internalRead()
char	read() Returns the next char.
void	unread() Unread the last read char.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractLexerSource

protected AbstractLexerSource(java.lang.String sourceName)

Method Detail

internalRead

protected abstract char internalRead()

read

public char read()

Description copied from interface: ILexerSource

Returns the next char.

Specified by:

read in interface ILexerSource

Returns:

the next char.

See Also:

ILexerSource.read()

unread

public void unread()

Description copied from interface: ILexerSource

Unread the last read char.

Specified by:

unread in interface ILexerSource

See Also:

ILexerSource.unread()

getOffset

public int getOffset()

Description copied from interface: ILexerSource

Return the count of read characters.

Specified by:

getOffset in interface ILexerSource

Returns:

the count of read characters.

See Also:

ILexerSource.getOffset()

getSourceName

public java.lang.String getSourceName()

Description copied from interface: ILexerSource

Return the name of the source. For example this method can return the name of the file from which is readed.

Specified by:

getSourceName in interface ILexerSource

Returns:

the name of the source.

See Also:

ILexerSource.getSourceName()

getLastRead

public char getLastRead()

Specified by:

getLastRead in interface ILexerSource

Returns:

the last char returned by read()

getLine

public int getLine()

Specified by:

getLine in interface ILexerSource

Returns:

the current line number