org.antlr.tool

Class GrammarSpelunker

java.lang.Object

org.antlr.tool.GrammarSpelunker

public class GrammarSpelunker
extends Object

Load a grammar file and scan it just until we learn a few items of interest. Currently: name, type, imports, tokenVocab, language option. GrammarScanner (at bottom of this class) converts grammar to stuff like: grammar Java ; options { backtrack true memoize true } import JavaDecl JavaAnnotations JavaExpr ; ... : ... First ':' or '@' indicates we can stop looking for imports/options. Then we just grab interesting grammar properties.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	GrammarSpelunker.Scanner Strip comments and then return stream of words and tokens {';', ':', '{', '}'}

Field Summary

Fields

Modifier and Type	Field and Description
protected String	grammarFileName
protected String	grammarModifier
protected String	grammarName
protected List<String>	importedGrammars
protected String	inputDirectory
protected String	language
protected GrammarSpelunker.Scanner	scanner
protected String	token
protected String	tokenVocab

Constructor Summary

Constructors

Constructor and Description
GrammarSpelunker(String inputDirectory, String grammarFileName)

Method Summary

Methods

Modifier and Type	Method and Description
String	getGrammarModifier()
String	getGrammarName()
List<String>	getImportedGrammars()
String	getLanguage()
String	getTokenVocab()
protected void	grammarHeader()
protected void	imports()
static void	main(String[] args) Tester; Give grammar filename as arg
protected void	match(String expecting)
protected void	options()
void	parse()

Methods inherited from class java.lang.Object

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

Field Detail

grammarFileName

protected String grammarFileName

token

protected String token

scanner

protected GrammarSpelunker.Scanner scanner

grammarModifier

protected String grammarModifier

grammarName

protected String grammarName

tokenVocab

protected String tokenVocab

language

protected String language

inputDirectory

protected String inputDirectory

importedGrammars

protected List<String> importedGrammars

Constructor Detail

GrammarSpelunker

public GrammarSpelunker(String inputDirectory,
                String grammarFileName)

Method Detail

match

protected void match(String expecting)
              throws IOException

Throws:

IOException

parse

public void parse()
           throws IOException

Throws:

IOException

grammarHeader

protected void grammarHeader()
                      throws IOException

Throws:

IOException

options

protected void options()
                throws IOException

Throws:

IOException

imports

protected void imports()
                throws IOException

Throws:

IOException

getGrammarModifier

public String getGrammarModifier()

getGrammarName

public String getGrammarName()

getTokenVocab

public String getTokenVocab()

getLanguage

public String getLanguage()

getImportedGrammars

public List<String> getImportedGrammars()

main

public static void main(String[] args)
                 throws IOException

Tester; Give grammar filename as arg

Throws:

IOException