com.whitestein.lsps.lang.parser

Class ParserStringStream

java.lang.Object

com.whitestein.lsps.lang.parser.ParserStringStream

All Implemented Interfaces:

org.antlr.runtime.CharStream, org.antlr.runtime.IntStream

public class ParserStringStream
extends Object
implements org.antlr.runtime.CharStream

Similar to ANTLRStringStream, but uses a String as a storage for input.

ANTLRStringStream uses a char array, motivation was to not hold a reference to the whole input (substring method). As we hold the full source in parsed expressions anyway, it is more effective to use this class and not ANTLRStringStream.

Author:

mvo

Field Summary

Fields inherited from interface org.antlr.runtime.CharStream

EOF

Constructor Summary

Constructors

Constructor and Description
ParserStringStream(String input)

Method Summary

Modifier and Type	Method and Description
void	consume()
int	getCharPositionInLine()
int	getLine()
String	getSourceName()
int	index() Return the current input symbol index 0..n where n indicates the last symbol has been read.
int	LA(int i)
int	LT(int i)
int	mark()
void	release(int marker)
void	reset() Reset the stream so that it's in the same state it was when the object was created *except* the data array is not touched.
void	rewind()
void	rewind(int m)
void	seek(int index) consume() ahead until p==index; can't just set p=index as we must update line and charPositionInLine.
void	setCharPositionInLine(int pos)
void	setLine(int line)
int	size()
String	substring(int start, int stop)

Methods inherited from class java.lang.Object

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

Constructor Detail

ParserStringStream

public ParserStringStream(String input)

Parameters:

input -

Method Detail

reset

public void reset()

Reset the stream so that it's in the same state it was when the object was created *except* the data array is not touched.

consume

public void consume()

Specified by:

consume in interface org.antlr.runtime.IntStream

LA

public int LA(int i)

Specified by:

LA in interface org.antlr.runtime.IntStream

LT

public int LT(int i)

Specified by:

LT in interface org.antlr.runtime.CharStream

index

public int index()

Return the current input symbol index 0..n where n indicates the last symbol has been read. The index is the index of char to be returned from LA(1).

Specified by:

index in interface org.antlr.runtime.IntStream

size

public int size()

Specified by:

size in interface org.antlr.runtime.IntStream

mark

public int mark()

Specified by:

mark in interface org.antlr.runtime.IntStream

rewind

public void rewind(int m)

Specified by:

rewind in interface org.antlr.runtime.IntStream

rewind

public void rewind()

Specified by:

rewind in interface org.antlr.runtime.IntStream

release

public void release(int marker)

Specified by:

release in interface org.antlr.runtime.IntStream

seek

public void seek(int index)

consume() ahead until p==index; can't just set p=index as we must update line and charPositionInLine.

Specified by:

seek in interface org.antlr.runtime.IntStream

substring

public String substring(int start,
                        int stop)

Specified by:

substring in interface org.antlr.runtime.CharStream

getLine

public int getLine()

Specified by:

getLine in interface org.antlr.runtime.CharStream

getCharPositionInLine

public int getCharPositionInLine()

Specified by:

getCharPositionInLine in interface org.antlr.runtime.CharStream

setLine

public void setLine(int line)

Specified by:

setLine in interface org.antlr.runtime.CharStream

setCharPositionInLine

public void setCharPositionInLine(int pos)

Specified by:

setCharPositionInLine in interface org.antlr.runtime.CharStream

getSourceName

public String getSourceName()

Specified by:

getSourceName in interface org.antlr.runtime.IntStream