hussam.math.operations
Class Operand

java.lang.Object
hussam.math.operations.Operand

All Implemented Interfaces:

Operation, Operator, java.lang.Comparable<Operator>

Direct Known Subclasses:

OperatorFactoryDB.CommaOperand

public abstract class Operand
extends java.lang.Object
implements Operator

An Operand is an Operator that takes at most two Operations as arguments. Operands are like, + - ^ % > <= etc...

For Example:
 5 + 8
 8, and 5 are ConstantNumbers,
 + is an operand.
 Operand o = new PlusOperand(Operator.PLUS, new ConstantNumber(5), new ConstantNumber(8));
 System.out.println(o.result());

Author:

Hussam Al-Mulhim حسام الملحم

See Also:

Operator, OperatorFactoryDB, Function

Operand

public Operand(int type,
               java.lang.String name,
Operation previous,
Operation next)

Construcs an Operation Operand by a Power type, and two operations.

Parameters:

type - The power of this Operand. for example: Operator.POWER

name - the name of this operand

previous - the previous operation

next - the next operations.

Operand

public Operand(int type,
               java.lang.String name)

Construcs an Operand by giving it a name, and a power. You can set the operations later.

Parameters:

type - The power of the operand. for example: Operator.PLUS

name - the name of the operand.

getType

public int getType()

Specified by:

getType in interface Operator

getName

public java.lang.String getName()

Description copied from interface: Operator

Returns the name of this Operator.

Specified by:

getName in interface Operator

Returns:

the name of this operator.

setPrevious

public void setPrevious(Operation operation)

Sets the previos operation.
 5 + 8
 5 is the previous operation.
 8 is the next operation.

Parameters:

operation - the operation to be set.

setNext

public void setNext(Operation operation)

Sets the next operation.
 5 + 8
 5 is the previous operation.
 8 is the next operation.

Parameters:

operation - the operation to be set.

set

public void set(Operation previous,
Operation next)

Sets the previos and next operation.
 5 + 8
 5 is the previous operation.
 8 is the next operation.

Parameters:

previous - the previous operation.

next - the next operation.

getPrevious

public Operation getPrevious()

the previous operation.

Returns:

the previous operation.

getNext

public Operation getNext()

returns the next operation.

Returns:

the next operation.

toString

public java.lang.String toString()

returns a description of this operand.

Overrides:

toString in class java.lang.Object

Returns:

a description of this Operand

compareTo

public int compareTo(Operator p)

Compares this operand with another Operator. The comparison is based on the Type of the operator.

Specified by:

compareTo in interface java.lang.Comparable<Operator>

Parameters:

p - the Operaotor.

Returns:

a signal indicating the comparison between the two. 1, -1, 0 indicating larger, smaller, equal.

checkReady

protected void checkReady()
                   throws OperatorArgumentMissingException

Tests if this operand has two arguments, a previous argument and a next argument.

Throws:

OperatorArgumentMissingException - Thrown if this Operand has one argument missing.