Examples of commonj.sdo.DataGraph

commonj.sdo.DataGraph
A data graph is used to package a graph of {@link DataObject data objects} along with theirmetadata, that is, data describing the data. A data graph also contains a {@link #getChangeSummary change summary} which is used to record changes made to the objects in the graph.

     * createRootObject(uri_string, typeName_string) test with bad parms.
     */
    public void testCreateRootObjectUriTypenameBad2() throws IOException {
        // Create an empty data graph and pass bad parms to createRootObject
      
        DataGraph dataGraph = SDOUtil.createDataGraph();
        boolean success = false;
        try {
            dataGraph.createRootObject("http://www.example.com/simple", "Mangled");            
        } catch(NullPointerException npe) {
            fail("createRootObject with mangled type name threw NullPointerException");
        } catch(Exception e) {
            success = true;
        }

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     * getType(uri_string, typeName_string) test with good parms.
     */
    public void testGetType() throws IOException {
        // Create an empty data graph and get a type, a Quote type
      
        DataGraph dataGraph = SDOUtil.createDataGraph();
        Type quoteType = dataGraph.getType("http://www.example.com/simple", "Quote");


        assertNotNull(quoteType);
    }

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     * getType(uri_string, typeName_string) test with bad URI parm.
     */
    public void testGetTypeBad1() throws IOException {
        // Create an empty data graph and pass bad parms to getType
      
        DataGraph dataGraph = SDOUtil.createDataGraph();
        Type quoteType = null;
        try {
            quoteType = dataGraph.getType("http://www.example.com/mangled", "Quote");            
        } catch(Exception e) {
            fail("getType with mangled URI threw an exception: "+e.getMessage());
        }
        assertNull(quoteType);
    }

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     * getType(uri_string, typeName_string) test with bad type name parm.
     */
    public void testGetTypeBad2() throws IOException {
        // Create an empty data graph and pass bad parms to getType
      
        DataGraph dataGraph = SDOUtil.createDataGraph();
        Type quoteType = null;
        try {
            quoteType = dataGraph.getType("http://www.example.com/simple", "Mangled"); 
        } catch(Exception e) {
            fail("getType with mangled type name threw an exception: "+e.getMessage());
        }
        assertNull(quoteType);
    }

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     * getType(uri_string, typeName_string) test with null URI parm.
     */
    public void testGetTypeBad3() throws IOException {
        // Create an empty data graph and pass bad parms to getType
      
        DataGraph dataGraph = SDOUtil.createDataGraph();
        Type quoteType = null;
        try {
            quoteType = dataGraph.getType(null, "Quote");            
        } catch(Exception e) {
            fail("getType with null URI threw an exception: "+e.getMessage());
        }
        assertNull(quoteType);
    }

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     * getType(uri_string, typeName_string) test with null type name parm.
     */
    public void testGetTypeBad4() throws IOException {
        // Create an empty data graph and pass bad parms to getType
      
        DataGraph dataGraph = SDOUtil.createDataGraph();
        Type quoteType = null;
        try {
            quoteType = dataGraph.getType("http://www.example.com/simple", null); 
        } catch(Exception e) {
            fail("getType with null type name threw an exception: "+e.getMessage());
        }
        assertNull(quoteType);
    }

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    public DataGraph loadDataGraph(InputStream inputStream, Map options, HelperContext scope) throws IOException {
        if (scope == null) {
            scope = HelperProvider.getDefaultContext();
        }
        TypeHelper th = scope.getTypeHelper();
        DataGraph result = null;
    if (th == null || th == TypeHelper.INSTANCE) {
        result = loadDataGraph(inputStream, options);
    } else if (options == null) {
        options = new HashMap();
        registerLoadingScope(options, th);

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     */
    public void testChangeSummary() throws IOException {
        // Create an empty data graph and add a root object, an instance of type Quote
        //
      
        DataGraph dataGraph = SDOUtil.createDataGraph();
        DataObject quote = dataGraph.createRootObject("http://www.example.com/simple", "Quote");


        // Begin logging changes
        //
        ChangeSummary changeSummary = dataGraph.getChangeSummary();
        changeSummary.beginLogging();


        // Modify the data graph in various fun and interesting ways
        //
        quote.setString("symbol", "fbnt");

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               "DataGraph datagraph = SDOUtil.loadDataGraph(\n"+
               "      ClassLoader.getSystemResourceAsStream(SampleInfrastructure.COMPANY_DATAGRAPH_XML), null);"


            );


            DataGraph datagraph = SDOUtil.loadDataGraph(ClassLoader.getSystemResourceAsStream(SampleInfrastructure.COMPANY_DATAGRAPH_XML), null);


            System.out.println(datagraph);


            commentary(
                "In this case we directly receive an instance of DataGraph and can retrieve the root\n"+
                "business object from the DataGraph\n\n"+
                "DataObject company = datagraph.getRootObject();");
            
            company = datagraph.getRootObject();
            System.out.println(company);            
            System.out.println();
                      
        } catch (Exception e) {
            somethingUnexpectedHasHappened(e);

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        commentary (COMMENTARY_FOR_INTERMEDIATE,
            "Here is the use of the Tuscany API for creating a DataGraph instance\n\n"+
            "DataGraph dataGraph = SDOUtil.createDataGraph();");


        DataGraph dataGraph = SDOUtil.createDataGraph();
        
        commentary(COMMENTARY_FOR_INTERMEDIATE,
            "Now we create a root object of a selected type for the DataGraph wrapper to contain.\n"+
            "This is an example of a DataGraph interface that currently forces us to use the default scope.\n\n"+
            "company = dataGraph.createRootObject(SampleInfrastructure.COMPANY_NAMESPACE, \"CompanyType\");");
        
        DataObject company = dataGraph.createRootObject(SampleInfrastructure.COMPANY_NAMESPACE, "CompanyType");
        
        populateGraph(scope, company);
        
        commentary(COMMENTARY_FOR_INTERMEDIATE,
            "Since the SDO API doesn't currently have a method for serializing the DataGraph instance\n"+

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Related Classes of commonj.sdo.DataGraph

org.apache.tuscany.das.rdb.impl.ReadCommandImpl

org.apache.tuscany.das.rdb.merge.impl.GraphMerger

org.apache.tuscany.samples.sdo.advanced.ObtainingDataGraphFromXml

org.apache.tuscany.samples.sdo.intermediate.CreateCompanyTuscanyAPI

org.apache.tuscany.samples.sdo.otherSources.CreateCompany

org.apache.tuscany.samples.sdo.specCodeSnippets.ObtainingDataGraphFromXml

org.apache.tuscany.sdo.helper.HelperProviderImpl$ResolvableImpl

org.apache.tuscany.sdo.helper.SDOHelperImpl

org.apache.tuscany.sdo.impl.ChangeSummaryImpl

org.apache.tuscany.sdo.spi.HelperProviderBase$ResolvableImpl

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