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001			H004.415 JOU
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080			_aH004.415 JOU
100			_aFrank, Ulrich
245			_aDelegation: An important concept for the appropriate design of object models
336			_2rdacontent _atexto _btxt
337			_2rdamedia _asin mediación _bn
338			_2rdacarrier _avolumen _bnc
505			_aIn many application domains, there are certain aspects that cannot be modeled in an adequate way using generalization - although it may be the concept of choice at first sight. Sometimes common associations, such as interaction or aggregation, will fail as well. In those cases, delegation often shows for an appropriate abstraction. While delegation has been an important concept in different areas of computer science for a long time, it is not explicitly offered by any of the major object-oriented modeling languages. The concept of delegation is introduced as part of an OO modeling language. Why both inheritance and common associations sometimes fail to model certain aspects of the real world is analyzed. Then, how delegation allows us to fill this conceptual gap is detailed. The semantics of delegation as a modeling concept is specified in a metamodel. To foster the appropriate use of delegation, a few examples together with a number of general design criteria are included.
650			_aSYSTEMS DESIGN
650			_aGUIDELINES
650			_aCUSTOMIZATION
650			_aOBJECT ORIENTED PROGRAMMING
650			_aMODELS
773			_tJOOP : the journal of object-oriented programming _wH004.415 JOU _nS.T.:H004.415 JOU PP3423 _g(vol. 13, nro. 3, Jun. 2000), p. 13-17, 44
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