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FIT2099 Object oriented design and implementation - S1 2026
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public void processUserData(Object[] data)
{ // Assumes index 0 is always Age and index 1 is always Postcode
int age = (int) data[0];
String postcode = (String) data[1];
}
A rushed engineering team configures multiple distinct classes to expect an implicit, exact structural order of values inside a plain object array. When a new developer unknowingly swaps the element insertion order in another module, this routine instantly crashes. By taking a shortcut that relies on structural sequence dependency across components, the team introduced technical debt tied to which type of connascence?public void handleUserRequest(Request req) {
parsePayload(req);
updateDatabase(req);
sendNetworkAlert(req);
renderUserInterface(req);
}
Under intense managerial pressure to deliver a feature, a developer crams UI parsing, database adjustments, networking requests, and error notifications into a single, massive routine block. The feature ships on time, but the resulting debt makes the method handle far too many disparate architectural responsibilities. Which structural code smell was directly accumulated in this routine due to the hurried implementation?The Hero Contract Scenario
The image illustrates Design by Contract (DbC) using a hero analogy. It defines three logical constraints: a Precondition where the hero must have web fluid before swinging, a Postcondition guaranteeing a web line attaches if fluid was present, and a Class Invariant requiring the hero’s mask to stay secure throughout the entire combat process.
The first panel in the image above contains a scenario description: "If the hero jumps with 'empty' shooters, the 'shooter' is not required to save him." This specific detail illustrates which core philosophy of Design by Contract?