opendap.servers.parsers

Class CeParser

java.lang.Object

opendap.servers.parsers.Ceparse

opendap.servers.parsers.CeParser

All Implemented Interfaces:

ExprParserConstants

public class CeParser
extends Ceparse

A Bison parser, automatically generated from ce.y.

Author:

LALR (1) parser skeleton written by Paolo Bonzini.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CeParser.Lexer Communication interface between the scanner and the Bison-generated parser CeParser.

Field Summary

Fields

Modifier and Type	Field and Description
static String	bisonSkeleton Name of the skeleton that generated this parser.
static String	bisonVersion Version number for the Bison executable that generated this parser.
static int	EOF Token returned by the scanner to signal the end of its input.
boolean	errorVerbose True if verbose error messages are enabled.
static int	SCAN_NUMBERCONST Token number, to be returned by the scanner.
static int	SCAN_STRINGCONST Token number, to be returned by the scanner.
static int	SCAN_WORD Token number, to be returned by the scanner.
static int	YYABORT Returned by a Bison action in order to stop the parsing process and return failure (false).
static int	YYACCEPT Returned by a Bison action in order to stop the parsing process and return success (true).
static int	YYERROR Returned by a Bison action in order to start error recovery without printing an error message.
static int	YYFAIL Returned by a Bison action in order to print an error message and start error recovery.

Fields inherited from class opendap.servers.parsers.Ceparse

cedebug, log

Fields inherited from interface opendap.servers.parsers.ExprParserConstants

AMPERSAND, COLON, COMMA, DEFAULT, EQUAL, FLOATCONST, FUNCTION, GREATER, GREATER_EQL, INTCONST, LBRACE, LBRACKET, LESS, LESS_EQL, LPAREN, NOT_EQUAL, operatorImage, RBRACE, RBRACKET, REGEXP, RPAREN, SEPARATOR, STRINGCONST, tokenImage, VAR, WORD

Constructor Summary

Constructors

Constructor and Description
CeParser(BaseTypeFactory factory) Instantiates the Bison-generated parser.
CeParser(CeParser.Lexer yylexer) Instantiates the Bison-generated parser.

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	constraint_expression(CEEvaluator ceEval, BaseTypeFactory factory, ClauseFactory clauseFactory, String constraint, String url)
String	getConstraint()
int	getDebugLevel() Answer the verbosity of the debugging output; 0 means that all kinds of output from the parser are suppressed.
PrintStream	getDebugStream() Return the PrintStream on which the debugging output is printed.
String	getURL()
boolean	parse() Parse input from the scanner that was specified at object construction time.
boolean	recovering() Return whether error recovery is being done.
void	setConstraint(String constraint)
void	setDebugLevel(int level) Set the verbosity of the debugging output; 0 means that all kinds of output from the parser are suppressed.
void	setDebugStream(PrintStream s) Set the PrintStream on which the debug output is printed.
void	setURL(String url)
protected void	yycdebug(String s)
protected void	yyerror(String s)

Methods inherited from class opendap.servers.parsers.Ceparse

constraint_expression, getAST, getASTnodeset

Methods inherited from class java.lang.Object

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

Field Detail

bisonVersion

public static final String bisonVersion

Version number for the Bison executable that generated this parser.

See Also:

Constant Field Values

bisonSkeleton

public static final String bisonSkeleton

Name of the skeleton that generated this parser.

See Also:

Constant Field Values

errorVerbose

public boolean errorVerbose

True if verbose error messages are enabled.

EOF

public static final int EOF

Token returned by the scanner to signal the end of its input.

See Also:

Constant Field Values

SCAN_WORD

public static final int SCAN_WORD

Token number, to be returned by the scanner.

See Also:

Constant Field Values

SCAN_STRINGCONST

public static final int SCAN_STRINGCONST

Token number, to be returned by the scanner.

See Also:

Constant Field Values

SCAN_NUMBERCONST

public static final int SCAN_NUMBERCONST

Token number, to be returned by the scanner.

See Also:

Constant Field Values

YYACCEPT

public static final int YYACCEPT

Returned by a Bison action in order to stop the parsing process and return success (true).

See Also:

Constant Field Values

YYABORT

public static final int YYABORT

Returned by a Bison action in order to stop the parsing process and return failure (false).

See Also:

Constant Field Values

YYERROR

public static final int YYERROR

Returned by a Bison action in order to start error recovery without printing an error message.

See Also:

Constant Field Values

YYFAIL

public static final int YYFAIL

Returned by a Bison action in order to print an error message and start error recovery. Formally deprecated in Bison 2.4.2's NEWS entry, where a plan to phase it out is discussed.

See Also:

Constant Field Values

Constructor Detail

CeParser

public CeParser(CeParser.Lexer yylexer)

Instantiates the Bison-generated parser.

Parameters:

yylexer - The scanner that will supply tokens to the parser.

CeParser

public CeParser(BaseTypeFactory factory)

Instantiates the Bison-generated parser.

Parameters:

yylexer - The scanner that will supply tokens to the parser.

Method Detail

getDebugStream

public final PrintStream getDebugStream()

Return the PrintStream on which the debugging output is printed.

setDebugStream

public final void setDebugStream(PrintStream s)

Set the PrintStream on which the debug output is printed.

Parameters:

s - The stream that is used for debugging output.

getDebugLevel

public final int getDebugLevel()

Answer the verbosity of the debugging output; 0 means that all kinds of output from the parser are suppressed.

Specified by:

getDebugLevel in class Ceparse

setDebugLevel

public final void setDebugLevel(int level)

Set the verbosity of the debugging output; 0 means that all kinds of output from the parser are suppressed.

Specified by:

setDebugLevel in class Ceparse

Parameters:

level - The verbosity level for debugging output.

yyerror

protected final void yyerror(String s)

yycdebug

protected final void yycdebug(String s)

recovering

public final boolean recovering()

Return whether error recovery is being done. In this state, the parser reads token until it reaches a known state, and then restarts normal operation.

parse

public boolean parse()
              throws ParseException,
                     ParseException

Parse input from the scanner that was specified at object construction time. Return whether the end of the input was reached successfully.

Specified by:

parse in class Ceparse

Returns:

true if the parsing succeeds. Note that this does not imply that there were no syntax errors.

Throws:

ParseException

constraint_expression

public static boolean constraint_expression(CEEvaluator ceEval,
                            BaseTypeFactory factory,
                            ClauseFactory clauseFactory,
                            String constraint,
                            String url)
                                     throws DAP2Exception,
                                            ParseException

Throws:

DAP2Exception

ParseException

setURL

public void setURL(String url)

Specified by:

setURL in class Ceparse

getURL

public String getURL()

Specified by:

getURL in class Ceparse

setConstraint

public void setConstraint(String constraint)

Specified by:

setConstraint in class Ceparse

getConstraint

public String getConstraint()

Specified by:

getConstraint in class Ceparse