CODEWITHSUNDEEP
groovy
reectrix
reectrix

Reputation: 8629

How do you determine the data type of calling object in Groovy?

When I'm calling a function in Groovy, how do I determine the class of the caller?

For example, I want to know what the class of foo is, inside the printFoo() function:

foo.printFoo()

def printFoo() {
  print(this.class)
}

And this should print out the class of foo

Upvotes: 2

Views: 7519

Answers (2)

sebnukem
sebnukem

Reputation: 8333

I don't know of any Groovy-specific way, but you can get the class name with object.getClass().name. Is that what you are looking for?

If you want to check if an object implements a particular interface or extends a particular class (e.g. Date) use:

object instanceof Date

or to check if the class of an object is exactly a particular class (not a subclass of it), use:

object.getClass() == Date

There's also the in operator: object in Date

Upvotes: 3

Jeff Scott Brown
Jeff Scott Brown

Reputation: 27255

The language and the runtime don't provide a reliable mechanism to do what you are asking about. You can do some pokey jiggery inspecting stack frames but that is really detailed low level stuff and won't really be reliable for a number of reasons. The short answer is, the language just doesn't support it.

Upvotes: 1

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