com.finalist.jag.template.parser
Class InputBuffer

java.lang.Object
  com.finalist.jag.template.parser.InputBuffer

Direct Known Subclasses:

CharBuffer

public abstract class InputBuffer

extends java.lang.Object

Class InputBuffer

Version:

%I%, %G%

Author:

Field Summary

protected int	markerOffset Field markerOffset
protected int	nMarkers Field nMarkers
protected int	numToConsume Field numToConsume
protected CharQueue	queue Field queue

Constructor Summary

InputBuffer()
Create an input buffer

Method Summary

void	commit() This method updates the state of the input buffer so that the text matched since the most recent mark() is no longer held by the buffer.
void	consume() Mark another character for deferred consumption
abstract void	fill(int amount) Ensure that the input buffer is sufficiently full
java.lang.String	getCharsFromMark(int mark) Method getCharsFromMark
java.lang.String	getLAChars() Method getLAChars
java.lang.String	getMarkedChars() Method getMarkedChars
boolean	isMarked() Method isMarked
char	LA(int i) Get a lookahead character
java.lang.String	LAChars(int n) Method LAChars
int	mark() Return an integer marker that can be used to rewind the buffer to its current state.
void	rewind(int mark) Rewind the character buffer to a marker.
protected void	syncConsume() Sync up deferred consumption

Methods inherited from class java.lang.Object

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

Field Detail

nMarkers

protected int nMarkers

Field nMarkers

markerOffset

protected int markerOffset

Field markerOffset

numToConsume

protected int numToConsume

Field numToConsume

queue

protected CharQueue queue

Field queue

Constructor Detail

InputBuffer

public InputBuffer()

Create an input buffer

Method Detail

commit

public void commit()

This method updates the state of the input buffer so that the text matched since the most recent mark() is no longer held by the buffer. So, you either do a mark/rewind for failed predicate or mark/commit to keep on parsing without rewinding the input.

consume

public void consume()

Mark another character for deferred consumption

fill

public abstract void fill(int amount)
                   throws CharStreamException

Ensure that the input buffer is sufficiently full

Parameters:

amount -

Throws:

CharStreamException

getLAChars

public java.lang.String getLAChars()

Method getLAChars

Returns:

getCharsFromMark

public java.lang.String getCharsFromMark(int mark)

Method getCharsFromMark

Parameters:

mark -

Returns:

LAChars

public java.lang.String LAChars(int n)
                         throws CharStreamException

Method LAChars

Parameters:

n -

Returns:

Throws:

CharStreamException

getMarkedChars

public java.lang.String getMarkedChars()

Method getMarkedChars

Returns:

isMarked

public boolean isMarked()

Method isMarked

Returns:

LA

public char LA(int i)
        throws CharStreamException

Get a lookahead character

Parameters:

i -

Returns:

Throws:

CharStreamException

mark

public int mark()

Return an integer marker that can be used to rewind the buffer to its current state.

Returns:

rewind

public void rewind(int mark)

Rewind the character buffer to a marker.

Parameters:

mark - Marker returned previously from mark()

syncConsume

protected void syncConsume()

Sync up deferred consumption