Decorator Pattern with multiple concrete components
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Currently I want to implement a Decorator Pattern in a static language. Consider the following structure:
Entity <-------- Decorator
^ ^ ^
| | |
| | |
Shape Group ConcreteDec
When I only have a ConcreteDec, I am unable to call Group.add(Entity), a function that is defined in Group, but isn't inherited from Entity. Shape isn't a class that could add anything; Shape can't have members, that wouldn't make sense. Inheriting add(Entity) from Entity in Shape wouldn't be an option.
Is there a way to call add(Entity) from ConcreteDec without breaking Shapenor the decorator pattern?
decorator
asked Nov 10 at 22:07
jallersma
115
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up vote
0
down vote
favorite
Currently I want to implement a Decorator Pattern in a static language. Consider the following structure:
Entity <-------- Decorator
^ ^ ^
| | |
| | |
Shape Group ConcreteDec
When I only have a ConcreteDec, I am unable to call Group.add(Entity), a function that is defined in Group, but isn't inherited from Entity. Shape isn't a class that could add anything; Shape can't have members, that wouldn't make sense. Inheriting add(Entity) from Entity in Shape wouldn't be an option.
Is there a way to call add(Entity) from ConcreteDec without breaking Shapenor the decorator pattern?
decorator
asked Nov 10 at 22:07
jallersma
115
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Currently I want to implement a Decorator Pattern in a static language. Consider the following structure:
Entity <-------- Decorator
^ ^ ^
| | |
| | |
Shape Group ConcreteDec
When I only have a ConcreteDec, I am unable to call Group.add(Entity), a function that is defined in Group, but isn't inherited from Entity. Shape isn't a class that could add anything; Shape can't have members, that wouldn't make sense. Inheriting add(Entity) from Entity in Shape wouldn't be an option.
Is there a way to call add(Entity) from ConcreteDec without breaking Shapenor the decorator pattern?
decorator
asked Nov 10 at 22:07
jallersma
115
Currently I want to implement a Decorator Pattern in a static language. Consider the following structure:
Entity <-------- Decorator
^ ^ ^
| | |
| | |
Shape Group ConcreteDec
When I only have a ConcreteDec, I am unable to call Group.add(Entity), a function that is defined in Group, but isn't inherited from Entity. Shape isn't a class that could add anything; Shape can't have members, that wouldn't make sense. Inheriting add(Entity) from Entity in Shape wouldn't be an option.
Is there a way to call add(Entity) from ConcreteDec without breaking Shapenor the decorator pattern?
decorator
decorator
asked Nov 10 at 22:07
jallersma
115
asked Nov 10 at 22:07
jallersma
115
asked Nov 10 at 22:07
jallersma
115
asked Nov 10 at 22:07
jallersma
115
asked Nov 10 at 22:07
jallersma
115
115
add a comment |
add a comment |
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