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Figure 6-33. After duplication, join the opposite pair of lug and rod models into a single object so that they can be duplicated again. Your first drum model is complete, but it isn t much of a drum kit by itself. Use a lasso selection (hold down the Ctrl key, hold down the left mouse button, and drag around in a circle) to select the entire drum. Then, duplicate the drum so that you have two identical drums in your Blender workspace. To make a kick or bass drum, rotate the copy so that it sits on its shell, and scale it up a little. For reference, if your original drum model is a 16-inch diameter floor tom, the kick drum can be 20 inches in diameter for a jazz kit or 22 inches for a rock kit. If you aspire to play on a kit like the late John Bonham of Led Zeppelin, then you need a 24-inch bass drum. Snare drums tend to be 14 inches across the skin but relatively shallow, whereas the toms that sit on top of the kick drum may be 12, 13, or 14 inches in diameter but are deeper than the snare. Experiment with Blender s 3D Transform Manipulator and free scaling tools until the various drums look right (see Figure 6-34).

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A persistence model is a model of persistence (whatever that means) Data persistence (Especially in the object world, where it s generally believed that persistence and data types are, or should be, orthogonal to one another I don t subscribe to that belief myself at least, not fully but that s not the point at issue here) [You] can use class models to model an objectbase s schema .. : I m not exactly sure what a class model is (it s not mentioned in the index to the UML book I referred to earlier), but I suspect it s something like what s more usually called a type constructor or type generator (I could be wrong) Anyway, what it might mean to use anything to model an objectbase s schema I have no idea.

Your next step will be to create the Test Suite and Test Case. 1. 2. 3. Click on the project name so the package will be selected automatically as the default flexUnitTests, and select File New Test Suite Class. In the next window, you can set the name and include any tests. Name the suite GetEmployeesSuite and hit Finish. Next, create the test case class by choosing File New Test Case Class. For the name choose: GetEmployeesInfoTester and for the Class to test. Click Finish.

Surely a schema is a (data) model, in the second of the two senses explained above [Class models] are not immediately appropriate for modeling schema [sic] of relational databases : I include this quote merely because I think it supports the suggestion in the previous paragraph to the effect that class models are basically type generators If UML includes, eg, SET and BAG and ARRAY and LIST class models but no RELATION class model, 3 it would indeed not be immediately appropriate for modeling schema[s] of relational databases.

The generated code looks for Test Suites classes you will be testing. Although the test suite was created automatically for you, the flexUnitTests does not include the Test Suite class.

Figure 6-34. Duplicating, rotating, and scaling can make a five-piece drum kit in a fraction of the time it took to make the original drum model. Real-life drums don t float in mid-air, so to increase realism you can model some legs for the drums to stand on. In the case of the original floor tom model, you can duplicate, scale up, and rotate a lug and tension rod joined object to look like one of three metal legs (see Figure 6-35).

[The] only thing that logical persistence models show that standard class models don t is candidate keys, and frankly, modeling candidate keys is a bad idea : I infer from this quote that a logical persistence model is something like a RELATION type generator, since it does apparently show candidate keys (though persistence has nothing to do with the matter! relations might or might not be persistent ) As for modeling candidate keys being a bad idea : Quite apart from the breathtaking implications of this remark candidate keys are categorically essential and must be specified! I don t really know what it means to model a key Does the term model really mean anything more in this context than just specify Keys form the greatest single source of coupling in relational databases ...

package flexUnitTests { [Suite] [RunWith("org.flexunit.runners.Suite")] public class GetEmployeesSuite { } }

It is good practice to reduce coupling within your design [= your model ]; therefore, you want to avoid using keys with business meaning The implication is that you really don t want to model candidate keys The suggestion to reduce coupling here is fatuous, of course As for the admonition not to model candidate keys, that piece of advice seems to mean rather that you should model them, but the keys in question should be surrogate keys, not natural ones (see later) And modeling such keys just seems to mean specifying them.

Remember to set a reference to all the test cases you will be combining in your Test Suite, so add a reference to the class. See the following code as an example:

Figure 6-35. Duplicate legs for the floor tom from a lug and tension rod and then scale them up to the right size. The two smaller toms need some hardware to support them, which in real life is usually attached to the top of the kick drum. One horizontal cylinder object to connect the toms, and a vertical cylinder to support the fitting, are a good start (see Figure 6-36). If you want to make this part of the model more realistic, you can make separate cylinder objects to support each tom.