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XDoclet requires the use of Ant, a build tool from Apache, which you can find at http://ant.apache.org. This chapter assumes that you have a working knowledge of Ant, including writing build.xml files for compiling and packaging your EJB files. If you have not used Ant for a build system, you can find specific recipes for those tasks in chapter 9. Specifically, XDoclet relies on the Ant task <ejbdoclet/>. Once inserted into the build.xml, the <ejbdoclet/> task allows you to specify subtasks for file generation, method construction, and more. Tasks execute a section of code within Ant. Ant contains many predefined tasks for such jobs as generating documentation and compiling, but it lets you build your own tasks as well. In fact, the <ejbdoclet/> task is a custom task that executes certain code in the XDoclet library. For this book, we used XDoclet beta version 1.2. Table 2.1 lists the JAR file dependencies needed by this version of XDoclet, as well as the URL for their download. The JAR files listed in table 2.1 must be in the classpath of the <ejbdoclet/> task added to your build.xml file before you execute the <ejbdoclet/> Ant task. (Some of the JAR files will not be needed if you don t use certain features of the 1.2 version of XDoclet.)

n 1, I discussed the concepts behind the use of business objects and distributed objects In 2, I explored the design of the business framework s 3 through 5 covered objectoriented design in general and then focused more around the specific stereotypes directly supported by CSLA NET In this chapter, I start walking through the implementation of the CSLA NET framework by providing an overview of the namespaces and project structure of the framework Then in s 7 through 16, I provide detail about the implementation of each of the major features of the framework as discussed in 2 The focus in this chapter is on the overall project structure and namespaces used to organize all the framework code and a walkthrough of the structure of the major types in the Csla and CslaCore namespaces CSLA .

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Table 2.1 The JAR file dependencies for the 1.2 version of XDoclet. These jars should be placed in the <ejbdoclet/> Ant task classpath in order for you to use XDoclet 1.2. Framework/application Ant 1.5 Log4j 1.13 Commons logging XML APIs Velocity JUnit Needed JAR files ant.jar log4j-1.1.3-jar commons-logging-1.0.jar xml-apis-2.0.2.jar velocity-1.4-dev.jar junit-3.7.jar URL http://jakarta.apache.org/ant/ http://jakarta.apache.org/log4j/ http://jakarta.apache.org/log4j/ http://xml.apache.org/xerces2-j/ http://jakarta.apache.org/velocity/index.html http://junit.org

NET has existed since around the year 2001 and has been steadily evolving since then, based on feedback from the user community and to keep up with the many changes Microsoft has made to the Microsoft NET Framework The result is that CSLA NET is now a large and complex framework My goal, however, is to take complexity out of the application and place it into CSLA NET so developers who use the framework don t need to deal with the complexity In other words, CSLA NET solves some pretty complicated issues and tries to expose its solutions in an easy-to-use manner As discussed in s 4 and 5, business developers primarily interact with a limited set of base classes provided by CSLA NET: CslaBusinessBase(Of T) CslaBusinessListBase(Of T, C) CslaReadOnlyBase(Of T) CslaReadOnlyListBase(Of T, C) CslaNameValueListBase(Of K, V) CslaCommandBase CslaEditableRootListBase(Of T) Csla.

Note This is different from a failed build. It may not be a problem to increment the version when the

CriteriaBase These base classes are the primary classes from which most business objects inherit Almost all the other classes in CSLA NET exist to support the functionality provided by these base classes In particular, BusinessBase(Of T) relies on quite a number of other classes For instance, CslaBusinessBase(Of T) inherits from CslaCoreBusinessBase, which inherits from CslaCoreUndoableBase It also makes use of the ValidationRules and AuthorizationRules classes, among others I ll start by describing the overall structure of the Csla project and then discuss each of the namespaces and the functionality each contains, with some extra emphasis on the Csla and CslaCore namespaces Most of the namespaces contain implementations of major CSLA NET features that are covered in detail in subsequent chapters..

After your environment is set up, you need to perform only three steps to generate code:

build itself fails for some reason. I am talking specifically about the construction and debugging phase of the build file.

Obviously, there is a lot to cover, and this book will include only the critical code from each class. You ll want to download the code for the book from the Source Code section of the Apress website (www.apress.com) or www.lhotka.net/cslanet/download.aspx so you can see each complete class or type as it is discussed.

Add the necessary XDoclet tags to your source files (similar to JavaDoc comment tags). Modify the <ejbdoclet/> task in the build.xml file to generate the desired files. Execute the Ant task using a command similar to ant ejbdoclet.

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