Software Construction: Object States
Cards to learn object states
Cards to learn object states
Kartei Details
| Karten | 13 |
|---|---|
| Sprache | Deutsch |
| Kategorie | Informatik |
| Stufe | Universität |
| Erstellt / Aktualisiert | 01.01.2020 / 10.01.2020 |
| Lizenzierung | Keine Angabe |
| Weblink |
https://card2brain.ch/box/20200101_software_construction_object_states
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| Einbinden |
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Static perspective on a Software System
Dynamic perspective on a Software System
Object State (Definition)
The state of an object refers to:
- the pieces of information the object represents at a given moment
- the actions that the object can perform at a given moment
Object State Definitions (3)
State Space: Set of all possible states for an object.
Concrete State: Value(s) stored at a given moment.
Abstract State: Arbitrarily-defined subset of the state space.
State Space Partitioning (Definition)
The software design task of state space partitioning is to define abstract states that correspond to characteristics that will help construct a clean solution.
State Diagrams (Definition)
State diagrams allow us to self-evaluate the impact of design decisions on the complexity of the abstract state space that must be considered when working with an object.
Here the abstract state space would consist of State A & B.
Example state diagram for an instance of deck (with separate initialization and shuffling)
Design Principle for State Space
Minimize the state space of objects to what is absolutely necessary for the object to fulfill its responsibilities.
