wahidsadik / java8-functional-playpen

I experiment my Java 8 functional adventures here

java8-functional-playpen

I experiment my Java 8 functional adventures here

TernaryDriver

This is to scratch an itch I had. With Java, I can do this:

String name = (hasLastName)
	? createFullName()
	: useFirstName();

Only one expression is allowed for each of those. There is no way to in-line more than one lines of code. I will have to extract that as method and to do that. Sometimes I don't want to do that.

So here is my attempt:

TernaryDriver<String> underTest = TernaryDriver.<String> builder()
	.whenTrue(() -> {
		// lots of code
		return "Hello World!"
	})
	.whenFalse(() -> {
		// lots of code
		return "Goodbye World!"
	})
	.build();

String response = underTest.apply(() -> "ABC".length() == 1); // response == "Goodbye World!"

Itch scratched. This also makes the code block reusable.

SwitchDriver

Functional way of creating switch.

Example:

	SwitchDriver<String, Integer> underTest = SwitchDriver.<String, Integer> builder()
		.defaultClause(word -> word.length())
		.addCase(word -> word.equals("BCD"), word -> word.length() + 10)
		.addCase(word -> word.equals("CDE"), word -> word.length() + 100)
		.build();
	
	//Use a supplier to pass a value to SwitchDriver
	underTest.apply(() -> "ABC").intValue();//returns 3
	
	//Or, use a direct value to SwitchDriver
	underTest.apply("ABC").intValue();//returns 3

IfDriver

Coming up!