lab.art

Class UnaryExpression

java.lang.Object

lab.art.Expression

lab.art.UnaryExpression

Direct Known Subclasses:

Cosine, Sine

public abstract class UnaryExpression
extends Expression

This class represents a unary expression.

Constructor Summary

Constructors

Constructor and Description
UnaryExpression(Expression expression) Initializes this unary expression with the given subexpression.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object object) Tests whether this unary expression is the same as the given object.
double	evaluate(double x, double y, UnaryOperator operator) Evaluates this unary expression at the given x- and y-coordinate with the given unary operator.
int	hashCode() Returns the hash code of this unary expression.
String	toString(String pattern) Returns a string representation of this unary expression for the given pattern.

Methods inherited from class lab.art.Expression

evaluate

Methods inherited from class java.lang.Object

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

Constructor Detail

UnaryExpression

public UnaryExpression(Expression expression)

Initializes this unary expression with the given subexpression.

Parameters:

expression - the subexpression.

Precondition:

expression != null

Method Detail

equals

public boolean equals(Object object)

Tests whether this unary expression is the same as the given object. Two unary expressions are the same if their subexpressions are the same.

Overrides:

equals in class Object

Parameters:

object - an object.

Returns:

true if this unary expression is the same as the given object, false otherwise.

hashCode

public int hashCode()

Returns the hash code of this unary expression. The hash code of a unary expression is the same as the hash code of its subexpression.

Overrides:

hashCode in class Object

Returns:

the hash code of this unary expression.

evaluate

public double evaluate(double x,
              double y,
              UnaryOperator operator)

Evaluates this unary expression at the given x- and y-coordinate with the given unary operator.

Parameters:

x - the x-coordinate.

y - the y-coordinate.

operator - a unary operator.

Precondition:

x >= -1 && x <= 1, y >= -1 && y <= 1, operator != null

Returns:

the value of this unary expression at the given x- and y-coordinate with the given unary operator.

toString

public String toString(String pattern)

Returns a string representation of this unary expression for the given pattern.

Parameters:

pattern - the pattern describing how the subexpression should be formatted.

Precondition:

pattern contains %s once

Returns:

a string representation of this unary expression for the given pattern.