arlut.csd.Util
Class Parser

java.lang.Object
  |
  +--arlut.csd.Util.Parser

public class Parser

extends java.lang.Object

This class provides some extra utility methods to apply to a StreamTokenizer to make parsing the GASH files easier.

The Parser code assumes that the tokenizer has been set up to treat ':', ',', and '\n' as distinct tokens, with everything else treated as word chars.

Field Summary

(package private) java.io.StreamTokenizer

tokens

Constructor Summary

Parser(java.io.StreamTokenizer tokens)

Method Summary

boolean	atEOF() Returns true if we're at EOF
boolean	atEOL() Returns true if we're at EOL
int	checkNextToken() This method returns a peek at the next token in the StreamTokenizer that this Parser was initialized with.
int	checkNextToken(java.io.StreamTokenizer tokens) This method returns a peek at the next token in the StreamTokenizer passed in.
boolean	EOFnext() Returns true if the next thing to be read is EOF
boolean	EOLnext() Returns true if the next thing to be read is EOL
java.lang.String	getNextBit() getNextBit() returns the next String from the StreamTokenizer that this Parser was initialized with, skipping a single leading ':'s and ','s along the way, up to the next ',' or ':'.
java.lang.String	getNextBit(boolean skipleading) getNextBit() returns the next String from the StreamTokenizer that this Parser was initialized with.
java.lang.String	getNextBit(java.io.StreamTokenizer tokens) getNextBit() returns the next String from the StreamTokenizer, where the bits are separated by colons and commas.
java.lang.String	getNextBit(java.io.StreamTokenizer tokens, boolean skipleading, boolean includeCommas) getNextBit() returns the next String from the StreamTokenizer, where the bits are separated by colons and commas.
int	getNextInt() getNextBit() returns the next String from the StreamTokenizer that this Parser was initialized with.
java.lang.String	getNextLongBit() getNextLongBit() returns the next String from the StreamTokenizer that this Parser was initialized with, skipping a single leading ':'s along the way, up to the next ':'.
void	setStream(java.io.StreamTokenizer tokens) This method connects this Parser object to a different StreamTokenizer.
void	skipToEndLine() This method runs tokens to the end of the line.

Methods inherited from class java.lang.Object

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

Field Detail

tokens

java.io.StreamTokenizer tokens

Constructor Detail

Parser

public Parser(java.io.StreamTokenizer tokens)

Method Detail

setStream

public void setStream(java.io.StreamTokenizer tokens)

This method connects this Parser object to a different StreamTokenizer.

atEOL

public boolean atEOL()

Returns true if we're at EOL

atEOF

public boolean atEOF()

Returns true if we're at EOF

EOLnext

public boolean EOLnext()
                throws java.io.IOException

Returns true if the next thing to be read is EOL

java.io.IOException

EOFnext

public boolean EOFnext()
                throws java.io.IOException

Returns true if the next thing to be read is EOF

java.io.IOException

skipToEndLine

public void skipToEndLine()
                   throws java.io.IOException

This method runs tokens to the end of the line.

java.io.IOException

getNextInt

public int getNextInt()
               throws java.io.IOException,
                      java.lang.NumberFormatException

getNextBit() returns the next String from the StreamTokenizer that this Parser was initialized with.

java.io.IOException

java.lang.NumberFormatException

getNextBit

public java.lang.String getNextBit()
                            throws java.io.IOException

getNextBit() returns the next String from the StreamTokenizer that this Parser was initialized with, skipping a single leading ':'s and ','s along the way, up to the next ',' or ':'.

java.io.IOException

getNextLongBit

public java.lang.String getNextLongBit()
                                throws java.io.IOException

getNextLongBit() returns the next String from the StreamTokenizer that this Parser was initialized with, skipping a single leading ':'s along the way, up to the next ':'.

java.io.IOException

getNextBit

public java.lang.String getNextBit(boolean skipleading)
                            throws java.io.IOException

getNextBit() returns the next String from the StreamTokenizer that this Parser was initialized with.

Parameters:

skipleading - if true, getNextBit will chew through leading commas and colons until it gets to either a normal string or eol/eof.

java.io.IOException

getNextBit

public java.lang.String getNextBit(java.io.StreamTokenizer tokens)
                            throws java.io.IOException

getNextBit() returns the next String from the StreamTokenizer, where the bits are separated by colons and commas.

Parameters:

tokens - The StreamTokenizer to read from

java.io.IOException

getNextBit

public java.lang.String getNextBit(java.io.StreamTokenizer tokens,
                                   boolean skipleading,
                                   boolean includeCommas)
                            throws java.io.IOException

getNextBit() returns the next String from the StreamTokenizer, where the bits are separated by colons and commas.

Parameters:

skipleading - if true, getNextBit will chew through leading commas and colons until it gets to either a normal string or eol/eof.

includeCommas - if true, getNextBit will not treat commas as field separators

java.io.IOException

checkNextToken

public int checkNextToken()
                   throws java.io.IOException

This method returns a peek at the next token in the StreamTokenizer that this Parser was initialized with.

java.io.IOException

checkNextToken

public int checkNextToken(java.io.StreamTokenizer tokens)
                   throws java.io.IOException

This method returns a peek at the next token in the StreamTokenizer passed in.

java.io.IOException