visitors.impl

Class Visitor2

java.lang.Object

visitors.impl.Visitor2

All Implemented Interfaces:

IVisitor

public class Visitor2
extends java.lang.Object
implements IVisitor

A visitor that sets the paint cmd in the VisitorDemoModel to a cmd that draws various shapes. The params is assumed to be a single value, a reference to the VisitorDemoModel. When the host is a HostA, the installed IPaintCmd draws a blue oval on the screen. When the host is a HostB, the installed IPaintCmd draws a red rectangle on the screen. �� When the host is a HostC, the installed IPaintCmd draws a green rounded rectangle on the screen. � Returns a string saying what it did.

Author:

swong

Field Summary

Fields inherited from interface visitors.IVisitor

NULL_VISITOR

Constructor Summary

Constructors

Constructor and Description
Visitor2()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	caseHostA(HostA host, java.lang.Object... params) Case for HostA
java.lang.Object	caseHostB(HostB host, java.lang.Object... params) Case for HostB
java.lang.Object	caseHostC(HostC host, java.lang.Object... params) Case for HostC

Methods inherited from class java.lang.Object

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

Constructor Detail

Visitor2

public Visitor2()

Method Detail

caseHostA

public java.lang.Object caseHostA(HostA host,
                         java.lang.Object... params)

Description copied from interface: IVisitor

Case for HostA

Specified by:

caseHostA in interface IVisitor

Parameters:

host - The HostA instance

params - Optional input parameters

Returns:

The result of processing HostA with the given parameters.

caseHostB

public java.lang.Object caseHostB(HostB host,
                         java.lang.Object... params)

Description copied from interface: IVisitor

Case for HostB

Specified by:

caseHostB in interface IVisitor

Parameters:

host - The HostB instance

params - Optional input parameters

Returns:

The result of processing HostB with the given parameters.

caseHostC

public java.lang.Object caseHostC(HostC host,
                         java.lang.Object... params)

Description copied from interface: IVisitor

Case for HostC

Specified by:

caseHostC in interface IVisitor

Parameters:

host - The HostC instance

params - Optional input parameters

Returns:

The result of processing HostC with the given parameters.