jurt: Throwable.getCause() instead of Throwable.getTargetException()

As of the JDK 1.4, Throwable.getCause() is the preferred method for getting thrown target exception.

Change-Id: I14f3f9ae52869d1149f92b32562e7fb3293109b5
Reviewed-on: https://gerrit.libreoffice.org/11027Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>

jurt/com/sun/star/comp/loader/FactoryHelper.java

@@ -198,7 +198,7 @@ public class FactoryHelper {
             try {
                 return _constructor.newInstance( args );
             } catch (InvocationTargetException invocationTargetException) {
-                Throwable targetException = invocationTargetException.getTargetException();
+                Throwable targetException = invocationTargetException.getCause();
 
                 if (targetException instanceof java.lang.RuntimeException)
                     throw (java.lang.RuntimeException)targetException;
@@ -274,7 +274,7 @@ public class FactoryHelper {
                 }
                 return instance;
             } catch (InvocationTargetException invocationTargetException) {
-                Throwable targetException = invocationTargetException.getTargetException();
+                Throwable targetException = invocationTargetException.getCause();
 
                 if (targetException instanceof java.lang.RuntimeException)
                     throw (java.lang.RuntimeException)targetException;

jurt/com/sun/star/comp/loader/JavaLoader.java

@@ -353,7 +353,7 @@ public class JavaLoader implements XImplementationLoader,
                         + implementationName + " because " + e.toString() );
         } catch ( InvocationTargetException e ) {
             throw new CannotActivateFactoryException("Can not activate the factory for "
-                        + implementationName + " because " + e.getTargetException().toString() );
+                        + implementationName + " because " + e.getCause().toString() );
         }
 
         return returnObject;

jurt/com/sun/star/lib/uno/environments/remote/Job.java

@@ -90,7 +90,7 @@ public class Job {
                     ? dispatch_queryInterface((Type) args[0])
                     : md.getMethod().invoke(_object, args);
             } catch (InvocationTargetException e) {
-                exception = e.getTargetException();
+                exception = e.getCause();
                 if (exception == null) {
                     exception = e;
                 }