D Sample Code

This document shows examples of the OperationProvider and OperationDelegate which provide an older means of simulating dynamic method bindings. These interfaces have been superseded and are included in this document for backward compatibility. Currently, the ADF Mobile runtime uses MethodDispatch, as described Chapter 7, "Extending ADF Mobile Client Applications with Java" instead.

This document includes the following sections:

Section D.1, "Using the OperationProvider and OperationDelegate Interfaces"

D.1 Using the OperationProvider and OperationDelegate Interfaces

Example D-2 illustrates a sample implementation of an OperationProvider and OperationDelegater to call custom methods. Example D-1 illustrates the corresponding metadata in the page definition file.

Example D-1 The bindings Metadata

</bindings>
       ...
      <methodAction id="Foo" InstanceName="AppModuleDataControl.dataProvider"
                                 DataControl="AppModuleDataControl" RequiresUpdateModel="true"
                                 Action="invokeMethod" MethodName="Foo"
                                 IsViewObjectMethod="false">
         <NamedData NDName="text" NDValue="testString" NDType="java.lang.String"/>
      </methodAction>
</bindings>

Example D-2 Using OperationProvider and OperationDelegate

package oracle.apps.sales.mobile.view;
 
import oracle.adfnmc.bindings.DataControl;
import oracle.adfnmc.bindings.OperationDelegate;
import oracle.adfnmc.bindings.dbf.OperationProvider;
import oracle.adfnmc.java.util.List;
 
import oracle.apps.sales.mobile.model.entities.LeadEOImpl;
import oracle.apps.sales.mobile.uiModel.views.LeadVOImpl;
 
import oracle.jbo.server.ApplicationModuleImpl;
 
public class CustomOperationProvider implements OperationProvider
{
  public CustomOperationProvider()
  {
  }
 
  public OperationDelegate getCustomOperation(Object module, String instanceName, String methodName)
  {
    if (instanceName.equals("AppModuleDataControl.dataProvider"))
    {
      if (methodName.equals("testMethod"))
      {
        return new testMethodDelegate();
      }
      else
      {
        // etc...
      }         
    }
    else if (instanceName.equals("AppModuleDataControl.LeadVO1"))
    {
      if (methodName.equals("convertLeadToOpty"))
      {
        return new convertLeadToOptyDelegate();
      }
      else
      {
        // etc...
      }
    }
    else if (instanceName.equals("AppModuleDataControl.OptyVO1"))
    { 
      // etc...
    }
    
    return null;
  }
 
  private static final class convertLeadToOptyDelegate implements OperationDelegate
  {
    public Object execute(Object instance, List params)
    {
      ((LeadVOImpl)instance).convertLeadToOpty();
      return null;
    }
  }
 
  private static final class testMethodDelegate implements OperationDelegate
  {
    public Object execute(Object instance, List params)
    {
      String arg0 = (String)params.get(0);
      return ((ApplicationModuleImpl)instance).testMethod(arg0);
    }
  }
}