marf.nlp.Parsing.GrammarCompiler
Class ProbabilisticGrammarCompiler

java.lang.Object
  marf.Storage.StorageManager
      marf.nlp.Parsing.GrammarCompiler.GrammarCompiler
          marf.nlp.Parsing.GrammarCompiler.ProbabilisticGrammarCompiler

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, IStorageManager

public class ProbabilisticGrammarCompiler
extends GrammarCompiler

Probabilistic Grammar Compiler processes a grammar enhanced with probability tokens assigned to each production.

$Id: ProbabilisticGrammarCompiler.java,v 1.21 2006/01/30 04:21:57 mokhov Exp $

Since:

0.3.0.2

Version:

$Revision: 1.21 $

Author:

Serguei Mokhov

See Also:

Serialized Form

Field Summary

Fields inherited from class marf.nlp.Parsing.GrammarCompiler.GrammarCompiler

oGrammar, oGrammarAnalyzer, oGrammarElement, oRule, oToken, soTransitionTable, strGrammarFileName, TOKEN_ACTION_BREAK, TOKEN_ACTION_CONTINUE, TOKEN_ACTION_PROCEED

Fields inherited from class marf.Storage.StorageManager

bDumpOnNotFound, iCurrentDumpMode, oObjectToSerialize, strFilename

Fields inherited from interface marf.Storage.IStorageManager

DUMP_BINARY, DUMP_CSV_TEXT, DUMP_GZIP_BINARY, DUMP_HTML, DUMP_SQL, DUMP_XML, MARF_INTERFACE_CODE_REVISION, STORAGE_FILE_EXTENSIONS

Constructor Summary

ProbabilisticGrammarCompiler(java.lang.String pstrGrammarFilename)
Constructor with the grammar file filename.

Method Summary

protected void	addNextRHSElement() Overridden to possibly take into consideration the probability tokens.
void	compileGrammar() Compiles probabilistic grammar.
protected void	createEpsilonToken() Overridden not to create epsilon tokens for probabilistic grammars.
protected void	createGrammarAnalyzer() Instantiates ProbabilisticGrammarAnalyzer with the current grammar.
protected void	createRule() Overridden to take into account the probability of grammar productions.
static java.lang.String	getMARFSourceCodeRevision() Retrieves class' revision.

Methods inherited from class marf.nlp.Parsing.GrammarCompiler.GrammarCompiler

addIDToken, addTerminalToken, checkUndefinedNonTerminals, createEOFTerminal, createNextNonTerminal, getBusted, getGrammar, getGrammarElement, getGrammarFileName, getNextRHSToken, getTransitionTable, loadTT, outputStats, parseGrammar, serialize

Methods inherited from class marf.Storage.StorageManager

backSynchronizeObject, clone, dump, dumpBinary, dumpCSV, dumpGzipBinary, dumpHTML, dumpSQL, dumpXML, enableDumpOnNotFound, equals, getDefaultExtension, getDefaultExtension, getDumpMode, getFilename, getObjectToSerialize, hashCode, restore, restoreBinary, restoreCSV, restoreGzipBinary, restoreHTML, restoreSQL, restoreXML, setDumpMode, setFilename, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ProbabilisticGrammarCompiler

public ProbabilisticGrammarCompiler(java.lang.String pstrGrammarFilename)
                             throws CompilerError

Constructor with the grammar file filename.

Parameters:

pstrGrammarFilename - the filename of the grammar file to use

Throws:

CompilerError - if initialization fails

Method Detail

createGrammarAnalyzer

protected void createGrammarAnalyzer()

Instantiates ProbabilisticGrammarAnalyzer with the current grammar.

Overrides:

createGrammarAnalyzer in class GrammarCompiler

See Also:

GrammarCompiler.createGrammarAnalyzer(), ProbabilisticGrammarAnalyzer

compileGrammar

public void compileGrammar()
                    throws CompilerError

Compiles probabilistic grammar.

Overrides:

compileGrammar in class GrammarCompiler

Throws:

CompilerError - in case of parsing or lexical mistakes

See Also:

GrammarCompiler.compileGrammar()

createEpsilonToken

protected void createEpsilonToken()

Overridden not to create epsilon tokens for probabilistic grammars. Doesn't do anything.

Overrides:

createEpsilonToken in class GrammarCompiler

See Also:

GrammarCompiler.createEpsilonToken()

createRule

protected void createRule()
                   throws CompilerError

Overridden to take into account the probability of grammar productions.

Overrides:

createRule in class GrammarCompiler

Throws:

CompilerError - if a rule operator ::= or a probability are not found, or there was syntax error while scanning a token in

java.lang.NumberFormatException - if the probability cannot be parsed as valid double

See Also:

GrammarCompiler.createRule()

addNextRHSElement

protected void addNextRHSElement()
                          throws SyntaxError

Overridden to possibly take into consideration the probability tokens. Now off.

Overrides:

addNextRHSElement in class GrammarCompiler

Throws:

SyntaxError - if unrecognized token type found

See Also:

GrammarCompiler.addNextRHSElement()

getMARFSourceCodeRevision

public static java.lang.String getMARFSourceCodeRevision()

Retrieves class' revision.

Returns:

revision string