jess
Class ReaderTokenizer

java.lang.Object
  jess.ReaderTokenizer

All Implemented Interfaces:

Tokenizer

public class ReaderTokenizer

extends java.lang.Object

implements Tokenizer

A simple Tokenizer implementation for the Jess language that takes its input from a Reader. Not serializable, as it contains a reference to a java.io.Reader.

(C) 2006 Sandia National Laboratories

Field Summary

Fields inherited from interface jess.Tokenizer

BLANK_MULTI, BLANK_PREFIX

Constructor Summary

ReaderTokenizer(java.io.Reader ios, boolean parseComments)
Constructor - use large buffer for FileReader, no buffering for everything else

Method Summary

java.lang.String	discardToEOL() Discard characters from the current stream position to the end of the current line.
void	eatWhitespace() Consume all characters up to, but not including, the next non-whitespace character
int	getStreamPos() Return the current character offset.
static boolean	isALong(java.lang.String sval)
static boolean	isAnInteger(java.lang.String sval)
JessToken	nextToken() Return the next parsed token, skipping over all whitespace.
java.lang.String	readLine() Return characters from the current location to the end of the current line, as a String
void	reportNewlines(boolean b) Specify whether newlines should be reported as tokens

Methods inherited from class java.lang.Object

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

Constructor Detail

ReaderTokenizer

public ReaderTokenizer(java.io.Reader ios,
                       boolean parseComments)

Constructor - use large buffer for FileReader, no buffering for everything else

Parameters:

ios -

Method Detail

reportNewlines

public void reportNewlines(boolean b)

Description copied from interface: Tokenizer

Specify whether newlines should be reported as tokens

Specified by:

reportNewlines in interface Tokenizer

Parameters:

b - true if newlines should be reported

readLine

public java.lang.String readLine()
                          throws JessException

Description copied from interface: Tokenizer

Return characters from the current location to the end of the current line, as a String

Specified by:

readLine in interface Tokenizer

Returns:

the rest of the current line

Throws:

JessException - if anything goes wrong

nextToken

public JessToken nextToken()
                    throws JessException

Description copied from interface: Tokenizer

Return the next parsed token, skipping over all whitespace.

Specified by:

nextToken in interface Tokenizer

Returns:

the token

Throws:

JessException - if anything goes wrong

eatWhitespace

public void eatWhitespace()
                   throws JessException

Description copied from interface: Tokenizer

Consume all characters up to, but not including, the next non-whitespace character

Specified by:

eatWhitespace in interface Tokenizer

Throws:

JessException

isAnInteger

public static boolean isAnInteger(java.lang.String sval)

isALong

public static boolean isALong(java.lang.String sval)

discardToEOL

public java.lang.String discardToEOL()
                              throws JessException

Description copied from interface: Tokenizer

Discard characters from the current stream position to the end of the current line.

Specified by:

discardToEOL in interface Tokenizer

Returns:

the parsed characters

Throws:

JessException - if anything goes wrong

getStreamPos

public int getStreamPos()

Description copied from interface: Tokenizer

Return the current character offset. The meaning depends on the underlying data source.

Specified by:

getStreamPos in interface Tokenizer

Returns:

the character position