Umple Traits and Umple Mixins
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Traits and Umple Mixins
In the same way Umple supports mixins to compose classes, traits can also be composed in this way. This means that a trait can be defined in several places or files and when they are used by clients, all elements defined in those separate places will be applied to clients.
The example 1 depicts two definitions for trait T1 (lines 4 and 8). Class C1 uses trait T1 and implement the required method method1() and also obtains two provided methods method2() and method3().
Example
/*
Example 1: showing how traits are combined with
Umple mixins.
To see different diagram views in UmpleOnline:
Use control-g for auto-layout as a class diagram
Use control-r to switch between trait view and
plain classes resulting from applying traits
Use control-m to show/hide methods
*/
trait T1{
void method1();
void method2() Java {/*impl… */ }
void method2() Python {'''impl… ''' }
}
trait T1{
void method3() Python {'''impl… ''' }
}
class C1{
isA T1;
void method1() Python {'''impl… ''' }
}
Load the above code into UmpleOnline