How to verify if an object has certain property?

Question

I want to use either a value of expected property or a specified default. How to achieve this in groovy?

Let\'s look at the example:

def printName(ob         


        

Answer 1

You can write your own method via meta-programming:

class Foo {
    def name = "Mozart"
}

def f = new Foo()

Object.metaClass.getPropertyOrElse = { prop, defaultVal ->
    delegate.hasProperty(prop) ? delegate."${prop}" : defaultVal
}

assert "Mozart" == f.getPropertyOrElse("name", "")
assert "Salzburg" == f.getPropertyOrElse("city", "Salzburg")