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diff --git a/usth/ICT2.7/P2L2 OO Software Engineering and UML Subtitles/15 - Class Diagram: Operations - lang_en_vs5.srt b/usth/ICT2.7/P2L2 OO Software Engineering and UML Subtitles/15 - Class Diagram: Operations - lang_en_vs5.srt deleted file mode 100644 index 8943fca..0000000 --- a/usth/ICT2.7/P2L2 OO Software Engineering and UML Subtitles/15 - Class Diagram: Operations - lang_en_vs5.srt +++ /dev/null @@ -1,111 +0,0 @@ -1 -00:00:00,110 --> 00:00:02,920 -At this point we have our classes, our attributes, - -2 -00:00:02,920 --> 00:00:05,740 -what we're missing is the operations for the class. - -3 -00:00:05,740 --> 00:00:08,340 -Let me remind you that operations represent the behavior - -4 -00:00:08,340 --> 00:00:10,370 -of a class, and that they may be found by - -5 -00:00:10,370 --> 00:00:14,310 -examining interactions among entities in the description of my - -6 -00:00:14,310 --> 00:00:18,480 -system. So once more, let's bring back our description, and - -7 -00:00:18,480 --> 00:00:22,090 -let's in this case focus on this specific item. - -8 -00:00:22,090 --> 00:00:25,330 -That says that the students may use the system to - -9 -00:00:25,330 --> 00:00:29,800 -add courses. So this is clearly indicating an action - -10 -00:00:29,800 --> 00:00:32,320 -that the students should be able to perform. But notice - -11 -00:00:32,320 --> 00:00:35,100 -that this doesn't mean that this is an operation that - -12 -00:00:35,100 --> 00:00:38,370 -should be provided by the student's class. It rather means - -13 -00:00:38,370 --> 00:00:41,860 -that there should be, somewhere in the system, the possibility - -14 -00:00:41,860 --> 00:00:45,080 -of performing this operation. So let's see what this means - -15 -00:00:45,080 --> 00:00:47,920 -for our example. This might mean, for example, if we - -16 -00:00:47,920 --> 00:00:50,400 -focus on the RegistrationManager, so that there should be an - -17 -00:00:50,400 --> 00:00:53,520 -operation in the RegistrationManager that allows me to add - -18 -00:00:53,520 --> 00:00:56,300 -a student to a course. And this, in turn, means - -19 -00:00:56,300 --> 00:01:00,270 -that both Course and CourseOffering should provide a way to - -20 -00:01:00,270 --> 00:01:04,140 -add a student. And therefore, I add this corresponding operation - -21 -00:01:04,140 --> 00:01:07,790 -to the RegistrationManager, to the Course, and to the CourseOffering. - -22 -00:01:07,790 --> 00:01:10,020 -So after doing that we will continue and populate in - -23 -00:01:10,020 --> 00:01:13,080 -a similar way, the other classes in the system. So - -24 -00:01:13,080 --> 00:01:16,040 -let me recap. Now we saw how to identify classes. - -25 -00:01:16,040 --> 00:01:18,300 -How to identify members of the classes, and - -26 -00:01:18,300 --> 00:01:21,910 -particular attributes, and operations. There is one thing that - -27 -00:01:21,910 --> 00:01:24,060 -we're missing, a very important aspect of the - -28 -00:01:24,060 --> 00:01:28,140 -class diagram which is the relationships between these classes. |