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For two objects, Foo and Bar the relationships can be defined
Association - I have a relationship with an object. Foo uses Bar
public class Foo {private Bar bar;};NB: See Fowler's definition - the key is that Bar is semantically related to Foo rather than just a dependency (like an int or string).
Composition - I own an object and I am responsible for its lifetime. When Foo dies, so does Bar
public class Foo {private Bar bar = new Bar();}Aggregation - I have an object which I've borrowed from someone else. When Foo dies, Bar may live on.
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WebMay 20, 2009 · Learn the difference between association, aggregation and composition in object-oriented programming, with examples in C# and …
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WebAggregation and composition are subsets of association that indicate a part-of relationship between classes. Aggregation implies that the child can exist independently of the parent, while composition implies that the child cannot.
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WebNov 19, 2018 · Learn how to use association, aggregation, and composition to define relationships between objects in object-oriented programming. See examples, UML diagrams, and code snippets for …
WebThe composition and aggregation are two subsets of association. In both of the cases, the object of one class is owned by the object of another class; the only difference is that in composition, the child does not exist …
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