By Kevin Lano BSc, MSc, PhD (auth.)
Formal Object-Oriented Development offers a finished assessment of using formal object-oriented tools; it covers how and the place they need to be brought into the improvement technique, how they are often brought selectively for serious elements of an software, and the way to include them successfully into present deveopmental practices.
The textual content is broadly illustrated, either with educational and self-assessment excercises and with examples of commercial purposes from the reactive structures area. This e-book can be of curiosity to educational and commercial researchers, software program engineering practitioners and specialists, and also will offer helpful studying fabric for college kids studying Z++ and VDM++.
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Additional info for Formal Object-Oriented Development
We only consider links between existing objects. agg => cp E Component 1\ ct E Container "If cp is a component of ct via agg, then both ct and cp are existing objects" . agg. att )®t } exp®t denotes the value of expression exp at time t. Chapter 4 discusses the properties of this operator. U is "distributed union" and takes the union of all the sets in the collection given as its argument. Then the three categories which are relevant to whether an association is an "aggregation" are: 1.
4. DEVELOPMENT EXAMPLE IN VDM++ The move operation simply sets the new location of the file to be the filestore and partition given in the input parameters. filestore in the definition of location denotes the value of the filestore attribute of pp - VDM++ currently only allows such references in a topology statement or the aux reasoning component of a class. It can be replaced by an explicit invocation of a enquiry operation of the supplier object. The move operation here moves a directory by individually moving each of its files.
The Move operation was the only method which required a non-trivial enhancement step, interpreting the text "move translates the point by a specified horizontal and vertical displacement from its current position" in the above manner. As in Z, an attribute identifier decorated with a ' denotes the value of this attribute at termination of the method or statement in whose definition it occurs. The undecorated identifier denotes the value of the attribute at initiation of execution of the method or statement.