By Jos Warmer, Anneke Kleppe

This e-book is a pragmatic, obtainable advisor to OCL for software program architects, designers, and builders. a lot care has been taken in the course of the remodel of OCL to make sure that the syntax is still readable and writable by way of the common software program modeler. the article Constraint Language, moment variation, makes use of a case research to teach the right way to workout those compact yet robust expressions for optimum influence.

Show description

Read or Download Object Constraint Language, The: Getting Your Models Ready for MDA PDF

Similar object-oriented software design books

Java & XML: Solutions to Real-World Problems

With the XML ''buzz'' nonetheless dominating speak between web builders, there is a genuine have to find out how to reduce throughout the hype and positioned XML to paintings. Java & XML indicates tips on how to use the APIs, instruments, and tips of XML to construct real-world purposes. the result's code and information which are transportable. This moment variation provides chapters on complicated SAX and complex DOM, new chapters on cleaning soap and information binding, and new examples all through.

Data Structures for Computational Statistics

Because the starting of the seventies computing device is out there to exploit programmable desktops for numerous projects. through the nineties the has built from the massive major frames to non-public workstations. these days it's not purely the that is even more robust, yet workstations can do even more paintings than a prime body, in comparison to the seventies.

Object-Oriented Analysis, Design and Implementation: An Integrated Approach

The second one variation of this textbook comprises revisions in accordance with the suggestions at the first variation. In a brand new bankruptcy the authors offer a concise advent to the rest of UML diagrams, adopting a similar holistic method because the first variation. utilizing a case-study-based strategy for delivering a complete advent to the rules of object-oriented layout, it includes:A sound footing on object-oriented techniques comparable to sessions, items, interfaces, inheritance, polymorphism, dynamic linking, and so on.

Extra info for Object Constraint Language, The: Getting Your Models Ready for MDA

Sample text

Adding them to the model results in a more complete specification of the system. 1 Simple Preconditions and Postconditions The context of preconditions and postconditions is specified by the name of the class that holds the operation and the operation signature (its name, parmeters, and return type). [1] When the number of points on the account is zero, the operation returns the value true. The postcondition states this more precisely; it tells us that the operation returns the outcome of the boolean expression points = 0.

The preceding invariant is named oneOwner. 5 Preconditions and Postconditions Preconditions and postconditions to operations are yet another way to complete the model depicted in a class diagram. Because pre- and postconditions do not specify how the body of an operation should be implemented, they are an effective way to precisely define the interfaces in the system. The concepts are defined as follows: A precondition is a boolean expression that must be true at the moment that the operation starts its execution.

However, sometimes you explicitly want to mention the subclasses. In the R&L example, the program partners want to limit the number of bonus points they give away; they have set a maximum of 10,000 points to be earned using services of one partner. The following invariant sums all the points of all transactions for a partner. points->sum() < 10,000 To determine the subclass to which an element of this collection of transactions belongs, we use the standard operation oclIsTypeOf, which takes a class, datatype, component, or interface name as parameter.

Download PDF sample

Rated 4.61 of 5 – based on 13 votes