com.sun.electric.database.variable

Class EvalSpice.SimpleEq

java.lang.Object

com.sun.electric.database.variable.EvalSpice.SimpleEq

Enclosing class:

EvalSpice

public static class EvalSpice.SimpleEq
extends java.lang.Object

A simple equation consists of two Identifiers (operands) that are Doubles, Strings, or other SimpleEq, and an operator *,/,+,-.

For a simple equation to be valid, it must define both operands and an operator. However, if the operator is '-', then the left hand operand may be null, to indicate a unary minus. Additionally, if only the left hand operator is defined, then it is simply one operand.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.Object	lhop
protected java.lang.Object	rhop

Constructor Summary

Constructors

Constructor and Description
EvalSpice.SimpleEq()
EvalSpice.SimpleEq(java.lang.Object lhop, EvalSpice.Op op, java.lang.Object rhop)

Method Summary

Methods

Modifier and Type	Method and Description
void	addIdentifier(java.lang.Object id)
boolean	addIdentifierOk()
void	addOp(EvalSpice.Op operator)
java.lang.Object	eval() Return either a Double, if the equation can be resolved numerically, or a String representing the equation after any numerical resolution can be done.

Methods inherited from class java.lang.Object

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

Field Detail

lhop

protected java.lang.Object lhop

rhop

protected java.lang.Object rhop

Constructor Detail

EvalSpice.SimpleEq

public EvalSpice.SimpleEq()

EvalSpice.SimpleEq

public EvalSpice.SimpleEq(java.lang.Object lhop,
                  EvalSpice.Op op,
                  java.lang.Object rhop)

Method Detail

addIdentifierOk

public boolean addIdentifierOk()

addIdentifier

public void addIdentifier(java.lang.Object id)
                   throws EvalSpice.ParseException

Throws:

EvalSpice.ParseException

addOp

public void addOp(EvalSpice.Op operator)
           throws EvalSpice.ParseException

Throws:

EvalSpice.ParseException

eval

public java.lang.Object eval()
                      throws EvalSpice.ParseException

Return either a Double, if the equation can be resolved numerically, or a String representing the equation after any numerical resolution can be done.

Returns:

a Double or a String

Throws:

EvalSpice.ParseException