Groovy / grails how to determine a data type?

groovy, types

Solution

To determine the class of an object simply call:

someObject.getClass()

You can abbreviate this to `someObject.class` in most cases. However, if you use this on a `Map` it will try to retrieve the value with key 'class'. Because of this, I always use `getClass()` even though it's a little longer.

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

(somObject instanceof Date)

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

(somObject.getClass() == Date)

Problem

Original source