ch.uzh.ifi.attempto.acewiki.gf
Class GFPredictiveParser

java.lang.Object
  ch.uzh.ifi.attempto.acewiki.gf.GFPredictiveParser

All Implemented Interfaces:

PredictiveParser

public class GFPredictiveParser
extends java.lang.Object
implements PredictiveParser

This is a predictive parser connecting to the JPGF implementation of GF.

Author:

Tobias Kuhn

Constructor Summary

GFPredictiveParser(GFGrammar gfGrammar, java.lang.String language)
Creates a new parser object for the given language.

Method Summary

void	addToken(java.lang.String token) Adds the token to the end of the token sequence.
void	addTokens(java.util.List<java.lang.String> tokens) Adds the tokens to the token list.
NextTokenOptions	getNextTokenOptions() This method returns the options for the next token to be added at the end.
int	getReference() This method should return the token number to which the last token refers, if it is a reference like "it".
int	getTokenCount() Returns the number of tokens of the current (partial) text.
java.util.List<java.lang.String>	getTokens() Returns the current token sequence.
boolean	isComplete() Returns true if the current token sequence is a complete statement.
boolean	isPossibleNextToken(java.lang.String token) Returns whether the given token is a possible next token.
void	removeAllTokens() Removes all tokens in the current token sequence.
void	removeToken() Removes the last token.
void	setTokens(java.util.List<java.lang.String> tokens) Sets the given tokens.

Methods inherited from class java.lang.Object

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

Constructor Detail

GFPredictiveParser

public GFPredictiveParser(GFGrammar gfGrammar,
                          java.lang.String language)

Creates a new parser object for the given language.

Parameters:

gfGrammar - The grammar object.

language - The language.

Method Detail

addToken

public void addToken(java.lang.String token)

Description copied from interface: PredictiveParser

Adds the token to the end of the token sequence.

Specified by:

addToken in interface PredictiveParser

Parameters:

token - The new token to be added.

addTokens

public void addTokens(java.util.List<java.lang.String> tokens)

Description copied from interface: PredictiveParser

Adds the tokens to the token list.

Specified by:

addTokens in interface PredictiveParser

Parameters:

tokens - The tokens to be added.

removeToken

public void removeToken()

Description copied from interface: PredictiveParser

Removes the last token.

Specified by:

removeToken in interface PredictiveParser

removeAllTokens

public void removeAllTokens()

Description copied from interface: PredictiveParser

Removes all tokens in the current token sequence.

Specified by:

removeAllTokens in interface PredictiveParser

setTokens

public void setTokens(java.util.List<java.lang.String> tokens)

Description copied from interface: PredictiveParser

Sets the given tokens. Existing tokens are removed.

Specified by:

setTokens in interface PredictiveParser

Parameters:

tokens - The tokens.

getTokens

public java.util.List<java.lang.String> getTokens()

Description copied from interface: PredictiveParser

Returns the current token sequence.

Specified by:

getTokens in interface PredictiveParser

Returns:

The current token sequence.

getTokenCount

public int getTokenCount()

Description copied from interface: PredictiveParser

Returns the number of tokens of the current (partial) text.

Specified by:

getTokenCount in interface PredictiveParser

Returns:

The number of tokens.

getNextTokenOptions

public NextTokenOptions getNextTokenOptions()

Description copied from interface: PredictiveParser

This method returns the options for the next token to be added at the end.

Specified by:

getNextTokenOptions in interface PredictiveParser

Returns:

The options describing the possible next tokens.

isPossibleNextToken

public boolean isPossibleNextToken(java.lang.String token)

Description copied from interface: PredictiveParser

Returns whether the given token is a possible next token.

Specified by:

isPossibleNextToken in interface PredictiveParser

Parameters:

token - The token.

Returns:

true if the token is a possible next token.

isComplete

public boolean isComplete()

Description copied from interface: PredictiveParser

Returns true if the current token sequence is a complete statement.

Specified by:

isComplete in interface PredictiveParser

Returns:

true if the current token sequence is complete.

getReference

public int getReference()

Description copied from interface: PredictiveParser

This method should return the token number to which the last token refers, if it is a reference like "it". -1 should be returned if the last token is not a reference, or if reference resolution is not implemented.

Specified by:

getReference in interface PredictiveParser

Returns:

The token number to which the last token refers.