org.hawk.ds
Class Element

java.lang.Object
  org.hawk.ds.Element

All Implemented Interfaces:

java.lang.Comparable

public class Element
extends java.lang.Object
implements java.lang.Comparable

This is a placeholder for perspective element in the input string.

Field Summary

static java.util.regex.Pattern	ARRAY_EXISTENCE_PATTERN RegEx to parse variable in the expression.
protected java.lang.String	element Raw element data.
protected boolean	execFunction Boolean if this element is a exec function script.
protected boolean	execModule Boolean if this element is a exec module script.
protected boolean	isVariable Boolean to indiate if the element is variable.
protected int	pos Starting position of raw element data.
protected boolean	structAsgnmnt Boolean if this element is a exec module script.
protected IScript	value
static java.util.regex.Pattern	VARIABLE_EXISTENCE_PATTERN RegEx to parse variable in the expression.
static java.util.regex.Pattern	VARIABLE_PATTERN RegEx to parse variable in the expression.

Constructor Summary

protected

Element(java.lang.String element, int pos)

Method Summary

int	compareTo(java.lang.Object herElement)
boolean	equals(java.lang.Object herElement)
boolean	flip() This flips "(" into ")" and vice versa.
java.lang.String	getElement()
static Element	getElement(int pos)
int	getPos()
int	getPrecedence() This returns the precedence of operators supported in hawk.
IScript	getValue()
int	hashCode()
boolean	hasHigherPrecedence(Element otherOpr)
boolean	isClosingClubber() This checks for ")"
boolean	isClubber() This checks for the element is either "(" or ")"
boolean	isConstant()
boolean	isDouble()
boolean	isExecFunction()
boolean	isExecModule()
boolean	isIsVariable() This checks if the the element is variable...
boolean	isLeft(Element herElement) This checks if the element's position left to the other element
boolean	isOperand() This checks if the element is operand
boolean	isOperator() If this is a operator
boolean	isRight(Element herElement) This checks if the element's position right to the other element
boolean	isStartingClubber() This checks for "("
boolean	isString()
boolean	isStructAsgnmnt()
boolean	isVariable()
static void	main(java.lang.String[] args)
static java.util.List<Element>	parseElements(java.lang.String equation) This parses input equation into list of Element
static java.util.List<Element>	reverse(java.util.List<Element> list) This returns the input list of elements .
void	setElement(java.lang.String element)
void	setExecFunction(boolean execFunction)
void	setExecModule(boolean execModule)
void	setIsVariable(boolean isVariable)
void	setPos(int pos)
void	setStructAsgnmnt(boolean structAsgnmnt)
void	setValue(IScript value)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

element

protected java.lang.String element

Raw element data.

pos

protected int pos

Starting position of raw element data.

isVariable

protected boolean isVariable

Boolean to indiate if the element is variable.

execFunction

protected boolean execFunction

Boolean if this element is a exec function script.

execModule

protected boolean execModule

Boolean if this element is a exec module script.

structAsgnmnt

protected boolean structAsgnmnt

Boolean if this element is a exec module script.

value

protected IScript value

VARIABLE_PATTERN

public static final java.util.regex.Pattern VARIABLE_PATTERN

RegEx to parse variable in the expression.

VARIABLE_EXISTENCE_PATTERN

public static final java.util.regex.Pattern VARIABLE_EXISTENCE_PATTERN

RegEx to parse variable in the expression.

ARRAY_EXISTENCE_PATTERN

public static final java.util.regex.Pattern ARRAY_EXISTENCE_PATTERN

RegEx to parse variable in the expression.

Constructor Detail

Element

protected Element(java.lang.String element,
                  int pos)

Parameters:

element - element

pos - starting position of element

Method Detail

getValue

public IScript getValue()

setValue

public void setValue(IScript value)

getElement

public java.lang.String getElement()

setElement

public void setElement(java.lang.String element)

getPos

public int getPos()

setPos

public void setPos(int pos)

isOperator

public boolean isOperator()

If this is a operator

Returns:

returns true if this is an operator else false.

isStartingClubber

public boolean isStartingClubber()

This checks for "("

Returns:

returns true if the element is "(" else false

isClosingClubber

public boolean isClosingClubber()

This checks for ")"

Returns:

returns true if the element is ")" else false

flip

public boolean flip()

This flips "(" into ")" and vice versa.

Returns:

true if it is able to flip else false

isClubber

public boolean isClubber()

This checks for the element is either "(" or ")"

Returns:

returns true if element is either "(" or ")"

isOperand

public boolean isOperand()

This checks if the element is operand

Returns:

returns true if the element is

isIsVariable

public boolean isIsVariable()

This checks if the the element is variable... yet to be computed.

Returns:

true if the element is variable.

setIsVariable

public void setIsVariable(boolean isVariable)

isExecFunction

public boolean isExecFunction()

setExecFunction

public void setExecFunction(boolean execFunction)

isExecModule

public boolean isExecModule()

setExecModule

public void setExecModule(boolean execModule)

isStructAsgnmnt

public boolean isStructAsgnmnt()

setStructAsgnmnt

public void setStructAsgnmnt(boolean structAsgnmnt)

isVariable

public boolean isVariable()

isConstant

public boolean isConstant()

isDouble

public boolean isDouble()

isString

public boolean isString()

getElement

public static Element getElement(int pos)

hashCode

public final int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public final boolean equals(java.lang.Object herElement)

Overrides:

equals in class java.lang.Object

compareTo

public int compareTo(java.lang.Object herElement)

Specified by:

compareTo in interface java.lang.Comparable

isLeft

public boolean isLeft(Element herElement)

This checks if the element's position left to the other element

Parameters:

herElement - the input element which is to be checked with this element for position

Returns:

returns true if the element's position is left to the other element

isRight

public boolean isRight(Element herElement)

This checks if the element's position right to the other element

Parameters:

herElement - the input element which is to be checked with this element for position

Returns:

returns true if the element's position is right to the other element

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:

java.lang.Exception

parseElements

public static java.util.List<Element> parseElements(java.lang.String equation)
                                             throws HawkException

This parses input equation into list of Element

Parameters:

equation - input equation to be parsed.

Returns:

returns list of element

Throws:

HawkException

reverse

public static java.util.List<Element> reverse(java.util.List<Element> list)

This returns the input list of elements . This does not modify the input list.

Parameters:

list - list of elements to be reversed.

Returns:

returns the reverse of the list.

getPrecedence

public int getPrecedence()
                  throws HawkException

This returns the precedence of operators supported in hawk.

Returns:

Throws:

HawkException

hasHigherPrecedence

public boolean hasHigherPrecedence(Element otherOpr)
                            throws HawkException

Throws:

HawkException