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To keep the focus on SOAP web services consumption let s look at a simple example. On the XMethods web site (http://www.xmethods.net) is a list of publicly available web services, one of which helps validate 10- and 13-digit ISBNs. An ISBN, short for International Standard Book Number, is a unique way of identifying a published and cataloged item. This web service is provided by a company called Data Access Europe BV (http://www.dataaccess.eu). To get started, you need the WSDL, which you can get from http://webservices.daehosting.com/services/isbnservice.wso WSDL. Now create a Flex project in Flash Builder and call it ISBNValidationWebService. Use the following steps to generate the web service proxies on the basis of WSDL: 1. Select Connect to Web Service from the Data menu in Flash Builder. The screen looks like the one shown in Figure 7-6. This brings up the wizard.

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Note If you decide to export in SMIL format, be careful about where KToon puts the still images referenced by

An example (excuse bad copy and pasteing): [The writer goes on to quote Stroustrup s Sentence Number 6 and my proposed expanded, rephrased, and corrected version of that sentence, and then continues:] Aside from obviously taking liberties (a with respect doesn t really cut it) this is not correcting the statement It was fine to begin with .. If you take it out of an implementation context then yes, this may be true Further the main point of this, again, is that the paragraph is concerned with LSP and invariants .. I can t believe that Chris Date doesn t know what an invariant is nor a class invariant This again only leaves the article as a trolling..

Figure 7-6. Select Connect to Web Service from the Data menu to start the process of web service proxy generation on the basis of WSDL. 2. Start by specifying the WSDL URI. Figure 7-7 shows how we did it. At this stage, you have two options: direct client access (which requires crossdomain.xml) or proxied access (which implies going through a data service). Because we are focused on integration without the use of data services in this chapter, select Directly from the client. You can also specify the service name, service package, and data type package here. Flash Builder populates values for these three parameters on the basis of the WSDL URI and some default configurations. The data type package is set to valueObjects and the service name is usually derived from the service name suggested by the WSDL URI. We will leave these values as such, but you are encouraged to choose appropriate names in line with the rest of your project code structure and naming systems.

Second expansion: BEGIN DECLARE TEMP ROW ( F1 SET TEMP = ROW ( 7.0, SET P = P.X ( TEMP.F1 SET P = P.Y ( TEMP.F2 END ; ..., F2 ... ) ; 5.0 ) ; ) ; ) ;

Figure 7-7. Specifying the WSDL URI 4. The tool quickly introspects the WSDL and shows the available operations in the next screen, as you can see in Figure 7-8.

the .smil file. By default, it saves the stills in a directory called data, with each still having the prefix of the project name and a suffix of the frame number: for example, ktoon-project0004.png. Therefore, when you copy or move a KToon project, it s essential that the correct data directory is copied together with the corresponding .smil file. If you had several KToon projects, all with their stills in directories called data, there would be plenty of room for confusion.

Figure 7-8. Web service operation endpoints as deciphered from WSDL 5. Next, click Finish to generate the required ActionScript classes. Note that you can deselect services for which you don t want to generate stubs. You can also select a different service and port. In this simple example that validates ISBN numbers, there is only one service and port pair to choose from. The service offers two operations and you can include both or just one. We choose to generate stubs for both the operations. The classes are all generated and are within the specified package structure in the project source folder. Pairs of base and extended classes are generated for the service operations. This allows custom extensions and behavior override in the subclasses, without impacting the generated base classes.