frysk.expr
Class FQIdentParser

java.lang.Object
  frysk.expr.FQIdentParser

public class FQIdentParser
extends Object

Funky HPD #-syntax doesn't map very well to LL-k type parser (for constant 'k'). When written directly in antlr, we obviously get lots of lexical ambiguities. We work around that by doing arbitrary manual look-ahead and just parsing the tokens ourselves. FQIdentParser is where that parsing takes place. Besides supporting antlr lexical analyzer, the class can be used standalone to parse arbitrary strings.

Nested Class Summary

static class	FQIdentParser.ExtraGarbageException
static class	FQIdentParser.FQIdentException
static class	FQIdentParser.InvalidTokenException

Method Summary

static boolean	isGlobChar(char c)
static boolean	isWildcardPattern(String str)
FQIdentToken	parse(String initial)
static FQIdentifier	parseFQIdentifier(String str, boolean allowDynamic, boolean allowGlobs, boolean expectMoreTokens)
static FQIdentifier	parseFtraceIdentifier(String str)

Methods inherited from class java.lang.Object

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

Method Detail

isGlobChar

public static boolean isGlobChar(char c)

isWildcardPattern

public static boolean isWildcardPattern(String str)

parse

public FQIdentToken parse(String initial)
                   throws RecognitionException,
                          CharStreamException,
                          TokenStreamException

Parameters:

initial - Portion of the character stream that is part of the identifier, but was already consumed by lexer.

Throws:

RecognitionException

CharStreamException

TokenStreamException

parseFQIdentifier

public static FQIdentifier parseFQIdentifier(String str,
                                             boolean allowDynamic,
                                             boolean allowGlobs,
                                             boolean expectMoreTokens)
                                      throws FQIdentParser.ExtraGarbageException,
                                             FQIdentParser.InvalidTokenException

Throws:

FQIdentParser.ExtraGarbageException

FQIdentParser.InvalidTokenException

parseFtraceIdentifier

public static FQIdentifier parseFtraceIdentifier(String str)
                                          throws FQIdentParser.ExtraGarbageException,
                                                 FQIdentParser.InvalidTokenException

Throws:

FQIdentParser.ExtraGarbageException

FQIdentParser.InvalidTokenException