Polymorphism & Abstract Class Contracts

Polymorphism enables separate objects to expose uniform method signatures while executing unique runtime logic under the hood.

1. Abstract Class Structural Blueprints

Abstract classes act as base validation blueprints. They cannot be instantiated directly and can declare abstract method stubs that subclasses must implement:

abstract class AbstractDatabaseConnector {
    // Shared core feature method inheritance paths
    public verifyNetwork(): boolean {
        return true;
    }

    // Abstract methods to be implemented by child classes
    public abstract establishConnection(): void;
    public abstract terminateConnection(): void;
}

2. Implementing Polymorphic Database Drivers

class PostgresDriver extends AbstractDatabaseConnector {
    public establishConnection(): void {
        console.log("Pooling state threads toward Postgres connection matrix.");
    }
    public terminateConnection(): void {
        console.log("Flushing relational buffer nodes cleanly.");
    }
}

class MongoDBDriver extends AbstractDatabaseConnector {
    public establishConnection(): void {
        console.log("Opening dynamic document connection pool handles.");
    }
    public terminateConnection(): void {
        console.log("Closing active network sockets.");
    }
}

// Polymorphic runtime orchestration mechanics
function runLifecycleDiagnostics(driver: AbstractDatabaseConnector): void {
    if (driver.verifyNetwork()) {
        driver.establishConnection(); // Executes completely unique logic depending on the active instance
        driver.terminateConnection();
    }
}

runLifecycleDiagnostics(new PostgresDriver());
runLifecycleDiagnostics(new MongoDBDriver());