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+
+ <title>Tuscany SCA Integration Test Databindings</title>
+ <!-- LINK rel="stylesheet" href="ait.css" type="text/css" -->
+ <link rel="stylesheet" href="../../css/base.css" type="text/css">
+</head>
+
+<body>
+<h3>Tuscany SCA Integation Test Databindings </h3>
+
+<h4>Overview</h4>
+
+<p>
+This integration test tests the Tuscany SCA databinding implementation by passing various data structures
+across various bindings using the supported databindings. There are tests for the individual databindings
+which exercise various bindings with the same databinding at client and server ends of each binding. There
+is also an integration test which exercises the transformer chains by specifying different databindings at
+client and server ends of the binding.
+</p>
+<p>
+In doing this testing it is apparent that there is a lot of repetition in creating client, services, idl and
+type for each of the data types for each of the bindings for each of the databindings. To reduce the amount
+of effort required to maintain the tests as new types, bindings and databindings are added the test cases
+themselves are generated from configuration files.
+</p>
+
+<h4>Test Structure</h4>
+
+Databindings/Common - hold files common across all tests <br/>
+Databindings/Interop - test the transformer chains with combinations of databindings<br/>
+Databindings/sdogen and jaxbgen - test each databindings independently<br/>
+
+<h4>Test Generation</h4>
+<p>
+To reduce the amount of manual effort involved in building and maintaining tests cases the test cases
+themselves are generated at run time using a set of velocity templates. Each test module has a generate.xml
+file in the resources/generate directory which tells the generator what to do. The file looks like this.
+</p>
+<img src="config.png">
+<p>
+Each <Template> element describes a velocit template to use in the test. The generator process is to expand
+each velocity template provided with all of the types specified in the <InputFile> sections.
+</p>
+<p>
+Each <InputFile> element describes a schema file used in the test. It also contains a description of each
+data type that will be tested. The generator then arranges for the databinding being tested to generate
+appropriate Java classes to represent the type at runtime. The individual databinding tests use the following
+flow.
+</p>
+
+Create data object at client<br/>
+Client passes data object to server<br/>
+Server modifies data object<br/>
+Server returns modified data object to client<br/>
+Client tests that modified data object is as expected<br/>
+<p>
+Hence the CreateTypeCode, ModifyTypeCode and ResultComparison elements which contain the type specific code
+that is used in the tests.
+</p>
+
+<h4>The Common Directory</h4>
+<p>
+The common directory contains the information that is common across all of the tests. This includes the
+common velocity templates and the source for the generator that reads the config.xml for each test. Common
+also contains all of the data type schema as these are common across all tests. Each test pom is written so
+that the contents of the common project are expanded into the tests target directory before the test starts.
+In this way all of the common elements are available for the test generation phase and at test runtime.
+</p>
+
+<h4>Individual Databinding Tests</h4>
+<p>
+The individual databinding tests, for example, sdogen and jaxbgen, are mostly empty as their content is
+generated at runtime. The configuration and any test specific templates can be found in the resources/generate
+directory. Some files are hand crafted for each test and live in their static position in the tests directory
+structure.
+</p>
+<p>
+Each test uses the same scenario
+</p>
+<img src="databinding.png">
+<p>
+The interface exposed by the greeter service provides a greet method for each data type being tested, for
+example,
+</p>
+<code>
+PersonType greetPersonType(PersonType param);<br/>
+AttributeComplexType greetAttributeComplexType(AttributeComplexType param);<br/>
+AttributeReferenceComplexType greetAttributeReferenceComplexType(AttributeReferenceComplexType param);<br/>
+</code>
+<p>
+These methods are taken from the SDO databinding test and hence PersonType, AttributeComplexType, etc. will
+have been generated by the SDO static type generator.
+</p>
+<p>
+Hence this tests a single databinding across a variety of data types and a variety of bindings. New bindings
+be tested by extending the composite. Be datatypes can be tested by updating the confix.xml file.
+</p>
+<h4>Databinding Interoperability Tests</h4>
+<p>
+This test uses the generated client, services and types from the individual databinding tests. It does not
+regenerate them and you will see a dependency in the interop test pom on the other databinding tests. Is also
+has some generate elements because the composite file must currently have import statements for all of the
+SDO factories required during tested.
+</p>
+<p>
+The scenario used here is,
+</p>
+<img src="interop.png">
+<p>
+A chain of components is built up for each binding. Each component, drawn from the the inidividual databinding
+tests, tests the full range of datatypes. The client components are designed so that they can be chained together
+and so tranformations across different databindings is tests. The service component simply changes the data
+content and returns it as before.
+</p>
+<h4>Building And Running The Tests</h4>
+<p>
+The tests can be built by doing the following.
+</p>
+<code>
+cd sca/itest/databindings <br/>
+mvn
+</code>
+<p>
+The only modification to this process is required if a new input file is added to the tests suite. In this
+case you will need to edit the config.xml files as appropriate but run mvn twice. This may sound a little
+odd but currently the sdo test uses its pom file to generate the require SDO types. As the test is self
+generating the pom file will not be updated to include the new type file until the second time it's run. The
+aim is at some point to remove this feature from the pom.
+</p>
+
+
+</body>
+</html>