Java cleanup - use generics to reduce casting

More queryInterface related cleanup.

Change-Id: I97d064c425389e687c6f0fbc3a962080f46dd511
Reviewed-on: https://gerrit.libreoffice.org/3568
Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>

odk/examples/DevelopersGuide/Forms/ButtonOperator.java

@@ -148,7 +148,7 @@ public class ButtonOperator implements XActionListener, XFeatureInvalidation
     public void actionPerformed( ActionEvent aEvent ) throws com.sun.star.uno.RuntimeException
     {
         // get the model's name
-        XPropertySet buttonModel = (XPropertySet)FLTools.getModel( aEvent.Source, XPropertySet.class );
+        XPropertySet buttonModel = FLTools.getModel( aEvent.Source, XPropertySet.class );
         try
         {
             short formFeature = getAssociatedFormFeature( buttonModel );

odk/examples/DevelopersGuide/Forms/DocumentViewHelper.java

@@ -69,7 +69,7 @@ class DocumentViewHelper
         @param aInterfaceClass
                 the class of the interface which shall be returned
     */
-    public Object get( Class aInterfaceClass )
+    public <T> T get( Class<T> aInterfaceClass )
     {
         return UnoRuntime.queryInterface( aInterfaceClass, m_controller );
     }
@@ -88,7 +88,7 @@ class DocumentViewHelper
         XDispatch xReturn = null;
 
         // go get the current view
-        XController xController = (XController)get( XController.class );
+        XController xController = get( XController.class );
         // go get the dispatch provider of it's frame
         XDispatchProvider xProvider = UnoRuntime.queryInterface(
             XDispatchProvider.class, xController.getFrame() );
@@ -119,7 +119,7 @@ class DocumentViewHelper
      */
     public XFormController getFormController( Object _form )
     {
-        XFormLayerAccess formLayer = (XFormLayerAccess)get( XFormLayerAccess.class );
+        XFormLayerAccess formLayer = get( XFormLayerAccess.class );
         return formLayer.getFormController( UnoRuntime.queryInterface( XForm.class, _form ) );
     }
 
@@ -133,7 +133,7 @@ class DocumentViewHelper
     public XControl getFormControl( XControlModel xModel ) throws com.sun.star.uno.Exception
     {
         // the current view of the document
-        XControlAccess xCtrlAcc = (XControlAccess)get( XControlAccess.class );
+        XControlAccess xCtrlAcc = get( XControlAccess.class );
         // delegate the task of looking for the control
         return xCtrlAcc.getControl( xModel );
     }
@@ -146,7 +146,7 @@ class DocumentViewHelper
     }
 
     /* ------------------------------------------------------------------ */
-    public Object getFormControl( Object aModel, Class aInterfaceClass ) throws com.sun.star.uno.Exception
+    public <T> T getFormControl( Object aModel, Class<T> aInterfaceClass ) throws com.sun.star.uno.Exception
     {
         XControlModel xModel = UnoRuntime.queryInterface( XControlModel.class, aModel );
         return UnoRuntime.queryInterface( aInterfaceClass, getFormControl( xModel ) );

odk/examples/DevelopersGuide/Forms/FLTools.java

@@ -159,7 +159,7 @@ public class FLTools
     /* ------------------------------------------------------------------ */
     /** retrieves the parent of the given object
     */
-    static Object getParent( Object aComponent, Class aInterfaceClass )
+    static <T> T getParent( Object aComponent, Class<T> aInterfaceClass )
     {
         XChild xAsChild = UnoRuntime.queryInterface( XChild.class, aComponent );
 
@@ -171,7 +171,7 @@ public class FLTools
     */
     static XPropertySet getParent( Object aComponent )
     {
-        return (XPropertySet)getParent( aComponent, XPropertySet.class );
+        return getParent( aComponent, XPropertySet.class );
     }
 
     /* ------------------------------------------------------------------ */
@@ -188,7 +188,7 @@ public class FLTools
     /* ------------------------------------------------------------------ */
     /** get's the XControlModel for a control
     */
-    static public Object getModel( Object aControl, Class aInterfaceClass )
+    static public <T> T getModel( Object aControl, Class<T> aInterfaceClass )
     {
         XControl xControl = UnoRuntime.queryInterface(
             XControl.class, aControl );

odk/examples/DevelopersGuide/Forms/SalesFilter.java

@@ -107,7 +107,7 @@ class SalesFilter implements XActionListener, XPropertyChangeListener, XResetLis
             // for the button, we can add to the control only, not to the model
             // - clicking a button is something which happens on the _control_.
             DocumentViewHelper aView = m_aDocument.getCurrentView();
-            XButton xButton = (XButton)aView.getFormControl( m_xApplyFilter, XButton.class );
+            XButton xButton = aView.getFormControl( m_xApplyFilter, XButton.class );
             xButton.addActionListener( this );
         }
         catch ( com.sun.star.uno.Exception e )

odk/examples/DevelopersGuide/OfficeDev/DesktopEnvironment/OfficeConnect.java

@@ -126,10 +126,10 @@ public class OfficeConnect
      * @param  sServiceSpecifier  name of service which should be created
      * @return  the new created service object
      */
-    public static synchronized Object createRemoteInstance(
+    public static synchronized <T> T createRemoteInstance(
-        Class aType, String sServiceSpecifier)
+        Class<T> aType, String sServiceSpecifier)
     {
-        Object aResult = null;
+        T aResult = null;
         try
         {
             aResult = UnoRuntime.queryInterface(aType,
@@ -157,10 +157,10 @@ public class OfficeConnect
      * @param  sServiceSpecifier  Description of Parameter
      * @return                    the new create service object
      */
-    public static synchronized Object createRemoteInstanceWithArguments(
+    public static synchronized <T> T createRemoteInstanceWithArguments(
-        Class aType, String sServiceSpecifier, Any[] lArguments)
+        Class<T> aType, String sServiceSpecifier, Any[] lArguments)
     {
-        Object aResult = null;
+        T aResult = null;
         try
         {
             aResult = UnoRuntime.queryInterface(aType,