Inversion of Control

Instead of scattering implementation details throughout your application, you should use IoC (Inversion of Control) to specify your concrete classes at startup in a centralized way. As you can see below, MentaContainer supports IoC in a variety of ways.

IoC:

public interface Logger {
	// contract methods
}

public class FileLogger implements Logger {
	// methods implementation
}

// inversion of control:
Container c = new MentaContainer(); // starting up the container
c.ioc(Logger.class, FileLogger.class); // choosing an implementation
Logger logger = c.get(Logger.class); // requesting an instance




Specifying constructor parameters:

public class FileLogger implements Logger {
	
	private final String filename;
	
	public FileLogger(String filename) {
		this.filename = filename;
	}
	
	// methods implementation
}

// inversion of control:
Container c = new MentaContainer();
c.ioc(Logger.class, FileLogger.class).addInitValue("/var/log/stdout.log");
Logger logger = c.get(Logger.class);




Specifying a property:

public class FileLogger implements Logger {
	
	private int maxSize = 1024;
	
	public void setMaxSize(int maxSize) {
		this.maxSize = maxSize;
	}
	
	// methods implementation
}

// inversion of control:
Container c = new MentaContainer();
c.ioc(Logger.class, FileLogger.class).addPropertyValue(2048);
Logger logger = c.get(Logger.class);