Package org.moeaframework.util.grammar

Class Rule

java.lang.Object

org.moeaframework.util.grammar.Rule

public class Rule
extends Object

A context-free grammar rule.

See Also:

• ContextFreeGrammar
• Production
• Symbol

Constructor Summary

Constructors

Constructor	Description
Rule(Symbol symbol)	Constructs a rule with the specified symbol.

Method Summary

Modifier and Type	Method	Description
void	add(Production production)	Adds a production to this rule.
Production	get(int index)	Returns the production at the specified index.
Symbol	getSymbol()	Returns the non-terminal symbol of this rule.
void	remove(Production production)	Removes a production from this rule.
int	size()	Returns the number of productions contained in this rule.

Methods inherited from class java.lang.Object

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

Constructor Details

Rule

public Rule(Symbol symbol)

Constructs a rule with the specified symbol. At least one production must be provided through the add(Production) method.

Parameters:

symbol - the non-terminal symbol of this rule

Method Details

getSymbol

public Symbol getSymbol()

Returns the non-terminal symbol of this rule.

Returns:

the non-terminal symbol of this rule

add

public void add(Production production)

Adds a production to this rule.

Parameters:

production - the production to be added

remove

public void remove(Production production)

Removes a production from this rule.

Parameters:

production - the production to be removed

size

public int size()

Returns the number of productions contained in this rule.

Returns:

the number of productions contained in this rule

get

public Production get(int index)

Returns the production at the specified index.

Parameters:

index - the index of the production to be returned

Returns:

the production at the specified index

Throws:

IndexOutOfBoundsException - if index is out of range ((index < 0) || (index >= size())