ponderToolkit.compiler.semantics.expressions
Class Operator

java.lang.Object
  |
  +--ponderToolkit.compiler.semantics.expressions.Operator

Direct Known Subclasses:

AddOp, CompEventOp, ConcOp, DomainSetOp, DomainUnaryOp, DotOp, LogicOp, MARKER, MethodOp, MultiplyOp, RelOp, StarEventOp, TimeEventOp, UnaryOp

public abstract class Operator

extends java.lang.Object

Function: Models an Operator - it is used both for expression operators and Domain Scope Expression operators

Field Summary

static int	AND
static int	AT_DOMAIN
static int	CONCURRENCY_AND
static int	CONCURRENCY_OR
static int	CONCURRENCY_PARALLEL
static int	CONCURRENCY_SEQUENTIAL
static int	DIV
static int	DOT
static int	EQUALS
static int	EVENT_OP_AMPER
static int	EVENT_OP_ARROW
static int	EVENT_OP_BAR
static int	EVENT_OP_NO_INTERLEAVE
static int	EVENT_OP_STAR
static int	EVENT_OP_TIME
static int	GREATER_THAN
static int	GREATER_THAN_EQUALS
static int	IMPLIES
static int	LESS_THAN
static int	LESS_THAN_EQUALS
static int	METHOD
static int	MINUS
static int	MULT
static int	NOT
static int	NOT_EQUALS
protected int	op
protected java.lang.String	opStr Fields
static int	OR
static int	PLUS
protected TokenPosition	pos
protected int	precedence
static int	SET_DIFFERENCE
static int	SET_INTERSECTION
static int	SET_UNION
static int	STAR_DOMAIN
static int	XOR

Constructor Summary

Operator()
Constructor with no parameters

Operator(java.lang.String newOpStr, int newOp, TokenPosition newPos)
Constructor which accepts the string representation of the operator the operator code, and the TokenPosition of the operator in the specification

Method Summary

ExprValue	evaluate(ExprValue val) Evaluates: OP val and returns the result Must be overwritten
ExprValue	evaluate(ExprValue val1, ExprValue val2) Calculates the result of val1 OP val2 and returns a Value Must be overwritten
int	getOpCode() Returns the Operator Code
java.lang.String	getOpStr() Returns the OpStr - The string representing the operator.
TokenPosition	getPos() Returns the TokenPosition of this operator
int	getPrecedence() Returns the Precedence value of the operator.

Methods inherited from class java.lang.Object

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

Field Detail

PLUS

public static final int PLUS

MINUS

public static final int MINUS

MULT

public static final int MULT

DIV

public static final int DIV

EQUALS

public static final int EQUALS

NOT_EQUALS

public static final int NOT_EQUALS

LESS_THAN

public static final int LESS_THAN

LESS_THAN_EQUALS

public static final int LESS_THAN_EQUALS

GREATER_THAN

public static final int GREATER_THAN

GREATER_THAN_EQUALS

public static final int GREATER_THAN_EQUALS

AND

public static final int AND

OR

public static final int OR

XOR

public static final int XOR

IMPLIES

public static final int IMPLIES

NOT

public static final int NOT

METHOD

public static final int METHOD

AT_DOMAIN

public static final int AT_DOMAIN

STAR_DOMAIN

public static final int STAR_DOMAIN

SET_UNION

public static final int SET_UNION

SET_DIFFERENCE

public static final int SET_DIFFERENCE

SET_INTERSECTION

public static final int SET_INTERSECTION

CONCURRENCY_SEQUENTIAL

public static final int CONCURRENCY_SEQUENTIAL

CONCURRENCY_OR

public static final int CONCURRENCY_OR

CONCURRENCY_PARALLEL

public static final int CONCURRENCY_PARALLEL

CONCURRENCY_AND

public static final int CONCURRENCY_AND

EVENT_OP_TIME

public static final int EVENT_OP_TIME

EVENT_OP_STAR

public static final int EVENT_OP_STAR

EVENT_OP_AMPER

public static final int EVENT_OP_AMPER

EVENT_OP_BAR

public static final int EVENT_OP_BAR

EVENT_OP_ARROW

public static final int EVENT_OP_ARROW

EVENT_OP_NO_INTERLEAVE

public static final int EVENT_OP_NO_INTERLEAVE

DOT

public static final int DOT

opStr

protected java.lang.String opStr

Fields

op

protected int op

pos

protected TokenPosition pos

precedence

protected int precedence

Constructor Detail

Operator

public Operator(java.lang.String newOpStr,
                int newOp,
                TokenPosition newPos)

Constructor which accepts the string representation of the operator the operator code, and the TokenPosition of the operator in the specification

Operator

public Operator()

Constructor with no parameters

Method Detail

getOpCode

public int getOpCode()

Returns the Operator Code

getPrecedence

public int getPrecedence()

Returns the Precedence value of the operator.

getOpStr

public java.lang.String getOpStr()

Returns the OpStr - The string representing the operator.

evaluate

public ExprValue evaluate(ExprValue val1,
                          ExprValue val2)

Calculates the result of val1 OP val2 and returns a Value Must be overwritten

evaluate

public ExprValue evaluate(ExprValue val)

Evaluates: OP val and returns the result Must be overwritten

getPos

public TokenPosition getPos()

Returns the TokenPosition of this operator