Factory Dilemma.java

// Original implementation
public class ConsoleCommandSource implements CommandSource {

	private final Console console;
	private final TextParser textParser;

	public ConsoleCommandSource(final Console console, final TextParser textParser) {
		this.textParser = textParser;
		this.console = console;
	}

	public void parseTo(final CommandReceiver commandReceiver) {
		console.parseInputToReceiver(textParser, commandReceiver);
	}
}

public class ExampleConsole implements Console {
        
        public void parseInputToReceiver(final TextParser textParser, final CommandReceiver commandReceiver) {
                while(/* Get user input */) {
	                // Passing same commandReceiver object each time
	                textParser.parseInputTo(stringInput, commandReceiver);
                }
        }
}

// Changed implementation with factory
public class ConsoleCommandSource implements CommandSource {

	private final Console console;
	private final TextParserFactory textParserFactory;

	public ConsoleCommandSource(final Console console, final TextParserFactory textParserFactory) {
		this.textParserFactory = textParserFactory;
		this.console = console;
	}

	public void parseTo(final CommandReceiver commandReceiver) {
                // Create the TextParser with the commandReceiver
		console.sendInputTo(textParserFactory.create(commandReceiver));
	}
}

// ExampleConsole becomes
public class ExampleConsole implements Console {
        
        public void parseInputToReceiver(final TextParser textParser) {
                while(/* Get user input */) {
                	textParser.parseInputTo(stringInput);
                }
        }
}