me.jaimegarza.syntax.model.parser

Class Rule

java.lang.Object

me.jaimegarza.syntax.model.parser.Rule

public class Rule
extends Object

~pojo class

During the parsing process, the grammar is represented as a list of rules. Each rule is composed of a list of zero or many RuleItems. This representation is used throughout the multiple processes to generate the structure of the syntax including computing first, follow, lookaheads, states, actions, grammar tables, and finally parsing tables. This class defines a whole rule.

Author:

jaimegarza@gmail.com

Constructor Summary

Constructors

Constructor and Description
Rule(int rulenum, int lineNumber, int precedence, NonTerminal leftHand) Construct a rule

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
int	exactIndexOf(RuleItem item)
RuleItem	getItem(int index)
List<RuleItem>	getItems()
NonTerminal	getLeftHand()
int	getLeftHandId() Convenience method to get the id of the left hand non-terminal
int	getLineNumber()
int	getPrecedence()
int	getRulenum()
void	setLeftHand(NonTerminal leftHand)
void	setLineNumber(int lineNumber)
void	setPrecedence(int precedence)
void	setRulenum(int rulenum)
String	toString() Returns a graphical directed representation of the left hand symbol and its items.

Methods inherited from class java.lang.Object

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

Constructor Detail

Rule

public Rule(int rulenum,
            int lineNumber,
            int precedence,
            NonTerminal leftHand)

Construct a rule

Parameters:

rulenum - is the rule id

lineNumber - is the line where the rule appears in the source file

precedence - is the precedence of the rule

leftHand - is the left hand symbol

Method Detail

getItem

public RuleItem getItem(int index)

Parameters:

index - is the index of the rule item

Returns:

the RuleItem with index index

getLeftHandId

public int getLeftHandId()

Convenience method to get the id of the left hand non-terminal

Returns:

the id of the left hand

getRulenum

public int getRulenum()

Returns:

the rulenum

setRulenum

public void setRulenum(int rulenum)

Parameters:

rulenum - the rulenum to set

getLineNumber

public int getLineNumber()

Returns:

the lineNumber

setLineNumber

public void setLineNumber(int lineNumber)

Parameters:

lineNumber - the lineNumber to set

getPrecedence

public int getPrecedence()

Returns:

the precedence

setPrecedence

public void setPrecedence(int precedence)

Parameters:

precedence - the precedence to set

getLeftHand

public NonTerminal getLeftHand()

Returns:

the leftHand

setLeftHand

public void setLeftHand(NonTerminal leftHand)

Parameters:

leftHand - the leftHand to set

getItems

public List<RuleItem> getItems()

Returns:

the items

exactIndexOf

public int exactIndexOf(RuleItem item)

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

See Also:

Object.equals(java.lang.Object)

toString

public String toString()

Returns a graphical directed representation of the left hand symbol and its items.

Overrides:

toString in class Object

See Also:

Object.toString()