Object Design

Design principles

• Commands down the stack, notifications up the stack

Where to put a method?

Take a feature statement and put the initiating method in the corresponding class.

<action> the <result> <by|for|of|to> a <moment-interval|role|description|part, place, thing>

Example: calculate the anticipated total of an RFQ.

We put the initiating method in the RFQ class.

Source: Java Modeling in Color with UML (pg 41)

Resources

• East-oriented

• Tell, Don't Ask