Example 4 -- House

House Sketch

We're going to model (code) a very simple house.

The components are shown in this sketch.

Roof Components

We have a variety of different roof types we can use.

GableRoof
FlatRoof
CurvedRoof
GreenRoof
ComboRoof
DomeRoof

We generally call any of these type "Roof"

Door Components

We have a variety of different roof types we can use.

FrenchDoor
PatioDoor
WoodEntryDoor
FiberglassEntryDoor
SteelEntryDoor

We generally call any of these type "Door"

Object Diagram

Time to take a cut at an object diagram.

We try to have the object diagram model (mimic) the real world or domain.

So we browse over our sketches again.

Template

Here is an object diagram template.

The three ivars shown are just for the template.

We may have anywhere between zero to many ivars (our idea).

House
    ---- ivar1 -------- ivar1Type
    ---- ivar2 -------- ivar2Type
    ---- ivar3 -------- ivar3Type
   etc

First Try

Come up with your first try of an object diagram

House
    ---- ivar1 -------- ivar1Type
    ---- ivar2 -------- ivar2Type
    ---- ivar3 -------- ivar3Type
   etc