marf.nlp.Parsing.GrammarCompiler
Class Rule

java.lang.Object
  marf.nlp.Parsing.GrammarCompiler.Rule

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

ProbabilisticRule

public class Rule
extends java.lang.Object
implements java.io.Serializable

Language Grammar Rule.

$Id: Rule.java,v 1.11 2006/01/01 01:28:17 mokhov Exp $

Since:

0.3.0.2

Version:

$Revision: 1.11 $

Author:

Serguei Mokhov

See Also:

Serialized Form

Field Summary

protected int	iID ID for reference and debugging.
protected NonTerminal	oLHS Left-hand side of this rule.
protected java.util.Vector	oRHS A vector of grammar elements on the right-hand-side of a production.

Constructor Summary

Rule(NonTerminal poLHS)
Constructor with LHS.

Method Summary

void	addRHSElement(GrammarElement poGrammarElement) Allows adding grammar elements on the RHS of this rule.
int	getID() Allows getting this rule's ID.
NonTerminal	getLHS() Allows getting current LHS non-terminal of this rule.
static java.lang.String	getMARFSourceCodeRevision() Retrieves class' revision.
java.util.Vector	getRHS() Allows getting the RHS part of this rule.
java.util.Vector	getRHSFirstSet(GrammarElement poEpsilon) Function that computes the first set of the right hand side of the current grammar rule.
void	setID(int piID) Allows setting this rule's ID.
void	setLHS(NonTerminal poNewLHS) Allows setting a new LHS from the outside.
void	setRHS(java.util.Vector poNewRHS) Allows setting a new RHS from the outside.
java.lang.String	toAbbrString() Just returns rule's ID prefixed with "R" as a string.
java.lang.String	toString() Overrides Object's toString() to human-readable production rule.
java.lang.String	toStringNumeric() Returns analogous representation of a rule to that of toString() except numeric IDs are used on the LHS.

Methods inherited from class java.lang.Object

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

Field Detail

iID

protected int iID

ID for reference and debugging.

oLHS

protected NonTerminal oLHS

Left-hand side of this rule. Must be a non-terminal.

oRHS

protected java.util.Vector oRHS

A vector of grammar elements on the right-hand-side of a production.

Constructor Detail

Rule

public Rule(NonTerminal poLHS)

Constructor with LHS.

Parameters:

poLHS - the default LHS non-terminal

Method Detail

addRHSElement

public void addRHSElement(GrammarElement poGrammarElement)

Allows adding grammar elements on the RHS of this rule.

Parameters:

poGrammarElement - RHS grammar element to add

getRHSFirstSet

public java.util.Vector getRHSFirstSet(GrammarElement poEpsilon)

Function that computes the first set of the right hand side of the current grammar rule.

Parameters:

poEpsilon - what to consider a termination element

Returns:

a collection of the elements in the first set

toString

public java.lang.String toString()

Overrides Object's toString() to human-readable production rule.

Overrides:

toString in class java.lang.Object

Returns:

rule dump in the textual form

See Also:

Object.toString()

toStringNumeric

public java.lang.String toStringNumeric()

Returns analogous representation of a rule to that of toString() except numeric IDs are used on the LHS.

Returns:

textual rule dump with numeric IDs on the LHS

See Also:

toString()

toAbbrString

public java.lang.String toAbbrString()

Just returns rule's ID prefixed with "R" as a string.

Returns:

rule's ID in string form

setLHS

public void setLHS(NonTerminal poNewLHS)

Allows setting a new LHS from the outside.

Parameters:

poNewLHS - new LHS non-terminal

setRHS

public void setRHS(java.util.Vector poNewRHS)

Allows setting a new RHS from the outside.

Parameters:

poNewRHS - new collection of the RHS elements

getLHS

public NonTerminal getLHS()

Allows getting current LHS non-terminal of this rule.

Returns:

the LHS non-terminal

getRHS

public java.util.Vector getRHS()

Allows getting the RHS part of this rule.

Returns:

current collection of the RHS elements

getID

public int getID()

Allows getting this rule's ID.

Returns:

the ID

setID

public void setID(int piID)

Allows setting this rule's ID.

Parameters:

piID - new ID of the rule.

getMARFSourceCodeRevision

public static java.lang.String getMARFSourceCodeRevision()

Retrieves class' revision.

Returns:

revision string