condor.classad
Class Parser

Object
  |
  +--condor.classad.Parser

class Parser

extends Object

This is the internal classad parser generated by byacc. From outside this package, it should be accessed through the wrapper class ClassAdParser.

Version:

2.0

Author:

Marvin Solomon

See Also:

ClassAdParser

Field Summary

(package private) boolean	acceptPrefix If true, accept when a prefix of the input matches.
static short	ERROR
(package private) PrintStream	errs Place to send error messages.
static short	FALSE
static short	IDENTIFIER
static short	INTEGER
static short	OP_EQ
static short	OP_GE
static short	OP_IS
static short	OP_ISNT
static short	OP_LAND
static short	OP_LE
static short	OP_LOR
static short	OP_NE
static short	OP_SHL
static short	OP_SHR
static short	OP_SHRR
static short	REAL
static short	STRING
(package private) boolean	tracing Set to true if parsing actions should be traced.
static short	TRUE
static short	UNARY
static short	UNDEFINED
(package private) int	verbosity Verbosity for error messages.

Constructor Summary

Parser(InputStream str)

Parser(Reader rdr)

Parser(String str)

Method Summary

boolean	enableTracing(boolean on) Turn debug tracing on or off.
int	getNextToken() Get and remove the "lookahead" token: the first token not yet consumed by the parser.
int	nextToken() Get the "lookahead" token: the first token not yet consumed by the parser.
Object	nextValue() Get the value associated with the "lookahead" token: the first token not yet consumed by the parser.
Object	parse() Check whether the the unconsumed input is a syntactically valid phrase according to the grammar.
Object	parse(boolean acceptPrefix) Check whether the the unconsumed input is a syntactically valid phrase according to the grammar.
(package private) void	printMessage(String msg) Print a message, decorated with the current line and column number.
void	reset(InputStream str)
void	reset(Reader rdr)
void	reset(String str)

Methods inherited from class Object

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

Field Detail

IDENTIFIER

public static final short IDENTIFIER

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Constant Field Values

INTEGER

public static final short INTEGER

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Constant Field Values

REAL

public static final short REAL

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Constant Field Values

STRING

public static final short STRING

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Constant Field Values

TRUE

public static final short TRUE

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Constant Field Values

FALSE

public static final short FALSE

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Constant Field Values

ERROR

public static final short ERROR

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Constant Field Values

UNDEFINED

public static final short UNDEFINED

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Constant Field Values

OP_LOR

public static final short OP_LOR

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Constant Field Values

OP_LAND

public static final short OP_LAND

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Constant Field Values

OP_EQ

public static final short OP_EQ

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Constant Field Values

OP_NE

public static final short OP_NE

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Constant Field Values

OP_IS

public static final short OP_IS

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Constant Field Values

OP_ISNT

public static final short OP_ISNT

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Constant Field Values

OP_LE

public static final short OP_LE

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Constant Field Values

OP_GE

public static final short OP_GE

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Constant Field Values

OP_SHL

public static final short OP_SHL

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Constant Field Values

OP_SHR

public static final short OP_SHR

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Constant Field Values

OP_SHRR

public static final short OP_SHRR

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Constant Field Values

UNARY

public static final short UNARY

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Constant Field Values

tracing

boolean tracing

Set to true if parsing actions should be traced.

acceptPrefix

boolean acceptPrefix

If true, accept when a prefix of the input matches.

verbosity

int verbosity

Verbosity for error messages. Values are: 0 - no messages 1 - only show message and line number 2 - also echo line in question 3 - also list tokens expected

errs

PrintStream errs

Place to send error messages. Default is System.err.

Constructor Detail

Parser

public Parser(Reader rdr)

Parser

public Parser(InputStream str)

Parser

public Parser(String str)

Method Detail

parse

public Object parse(boolean acceptPrefix)

Check whether the the unconsumed input is a syntactically valid phrase according to the grammar. Parsing stops at the end of the input, or the first token that cannot be included in a prefix of a valid phrase according to the grammar. If "acceptPrefix" is false and an invalid token is encountered before the end of the input, an error occurs. An error is also signaled if "acceptPrefix" is true but the input preceding the invalid token is not a valid phrase according the the grammar.

If the input is already at end of file when this method is called, it silently returns null. If an error occurs, a message is printed by calling the user-supplied method error(String) and the result is null. On success, the return value is the "semantic value" assigned by semantic routines to the start symbol.

Parameters:

acceptPrefix - if true, the input does not to be completely consumed.

Returns:

the "semantic value" corresponding to the phrase found or null for errors or end-of-file.

parse

public Object parse()

Check whether the the unconsumed input is a syntactically valid phrase according to the grammar. This method is equivalent to parse(true).

Returns:

the "semantic value" corresponding to the phrase found or null for errors or end-of-file.

enableTracing

public boolean enableTracing(boolean on)

Turn debug tracing on or off. Debugging output goes to System.out.

Parameters:

on - if true, turn tracing on; otherwise turn it off.

Returns:

the previous value.

reset

public void reset(Reader rdr)

reset

public void reset(InputStream str)

reset

public void reset(String str)

nextToken

public int nextToken()

Get the "lookahead" token: the first token not yet consumed by the parser. The token is not removed from the input stream.

Returns:

the code for the next token.

See Also:

getNextToken()

nextValue

public Object nextValue()

Get the value associated with the "lookahead" token: the first token not yet consumed by the parser. The token is not removed from the input stream.

Returns:

the value associated with the next token.

See Also:

nextToken()

getNextToken

public int getNextToken()

Get and remove the "lookahead" token: the first token not yet consumed by the parser. The token is removed from the input stream.

Returns:

the code for the next token.

See Also:

getNextToken()

printMessage

void printMessage(String msg)

Print a message, decorated with the current line and column number.

Parameters:

msg - the message to print.