Getting Startedwith pureQuery

Chapter 11 – Annotated-Method Programming Style 211
Development Studio for development, and that you have added pureQuery support to the
GettingStartedWithPureQuery project. If you have not already added pureQuery
support to your project, refer to Section 2.4.1 for instructions.
The Generator utility uses metadata about your database to know how to generate the
code that processes the tables in your database. Therefore, the Generator utility relies on
Optim Development Studio having a live database connection, or on using the “work
offline” feature in which it stores metadata locally. The “In practice” sections in this chapter
assume that you have a live database connection in Optim Development Studio, or that
you are using the “work offline” feature.
11.2.2 In practice: Observe the HumanResourcesData interface
Human Resources Manager uses only one interface of annotated methods:
HumanResourcesData. Locate the declaration of this interface in the
hrm.inProgress.pdqMethodStyle package.
hrm.inProgress.pdqMethodStyle.HumanResourcesData does not yet contain any
annotated methods. You can add them in the “In practice” sections in this chapter.
11.2.3 In practice: Create an instance of an interface of annotated methods in
the displayLogin() method
The Human Resources Manager application creates a single instance of
hrm.inProgress.pdqMethodStyle.HumanResourcesData in the displayLogin()
method, passes that instance to other methods as required, and then closes the instance
before the application exits. Modify the displayLogin() method in the class
hrm.inProgress.pdqMethodStyle.HumanResourcesManager so that it creates and
closes an instance of hrm.inProgress.pdqMethodStyle.HumanResourcesData.
11.2.3.1 Add code to the displayLogin() method to create the
HumanResourcesData object
Since we are using the annotated-method programming style, we need a getData method
that takes a Class interfaceClass parameter. We will be using a database, so
we choose a method that has a javax.sql.DataSource parameter. We choose the
method shown in Listing 11.3.
DataFactory.getData (Class interfaceClass, DataSource ds)
Listing 11.3 - The getData method that we will use to create an instance of
HumanResourcesData
The method displayLogin() in the class
hrm.inProgress.pdqMethodStyle.HumanResourcesManager contains a
declaration for a variable named data. Add code that creates an instance of
hrm.inProgress.pdqMethodStyle.HumanResourcesData and assigns the result to
data. Listing 11.4 shows the updated version of the code.