loplugin:unocast (i18npool::Calendar_gregorian)

(See the upcoming commit introducing that loplugin:unocast on why such
dynamic_casts from UNO types are dangerous.)

Change-Id: I1b0e544145c364cb9ee669b913132f41c1a8a66a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/144147
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

3 files changed, 18 insertions, 2 deletions

diff --git a/i18npool/inc/calendar_gregorian.hxx b/i18npool/inc/calendar_gregorian.hxx
index 1ee7cabaab1e..1f29d63f9f02 100644
--- a/i18npool/inc/calendar_gregorian.hxx
+++ b/i18npool/inc/calendar_gregorian.hxx
@@ -21,7 +21,9 @@
 #include "calendarImpl.hxx"
 
 #include <com/sun/star/i18n/CalendarFieldIndex.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
 
+#include <cppuhelper/implbase.hxx>
 #include <unicode/calendar.h>
 #include <rtl/ref.hxx>
 
@@ -44,7 +46,7 @@ struct Era {
 
 const sal_Int16 FIELD_INDEX_COUNT = css::i18n::CalendarFieldIndex::FIELD_COUNT2;
 
-class Calendar_gregorian : public CalendarImpl
+class Calendar_gregorian : public cppu::ImplInheritanceHelper<CalendarImpl, css::lang::XUnoTunnel>
 {
 public:
 
@@ -98,6 +100,9 @@ public:
     virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
     virtual css::uno::Sequence < OUString > SAL_CALL getSupportedServiceNames() override;
 
+    sal_Int64 SAL_CALL getSomething(css::uno::Sequence<sal_Int8> const & aIdentifier) override;
+    static css::uno::Sequence<sal_Int8> const & getUnoTunnelId();
+
 protected:
     const Era *eraArray;
     std::unique_ptr<icu::Calendar> body;
diff --git a/i18npool/source/calendar/calendarImpl.cxx b/i18npool/source/calendar/calendarImpl.cxx
index 4e364696cf20..60391473f944 100644
--- a/i18npool/source/calendar/calendarImpl.cxx
+++ b/i18npool/source/calendar/calendarImpl.cxx
@@ -21,6 +21,7 @@
 #include <calendar_gregorian.hxx>
 #include <localedata.hxx>
 #include <comphelper/processfactory.hxx>
+#include <comphelper/servicehelper.hxx>
 #include <cppuhelper/supportsservice.hxx>
 
 #include <com/sun/star/uno/XComponentContext.hpp>
@@ -90,7 +91,7 @@ CalendarImpl::loadCalendarTZ( const OUString& uniqueID, const css::lang::Locale&
             /* XXX NOTE: currently (2019-06-19) calendar implementations derive
              * from Calendar_gregorian, even Hijri and Jewish. If that should
              * change in future this should be adapted. */
-            Calendar_gregorian* pCal = dynamic_cast<Calendar_gregorian*>(xCalendar.get());
+            Calendar_gregorian* pCal = comphelper::getFromUnoTunnel<Calendar_gregorian>(xCalendar);
             bTimeZone = (pCal && pCal->setTimeZone(rTimeZone));
         }
 
diff --git a/i18npool/source/calendar/calendar_gregorian.cxx b/i18npool/source/calendar/calendar_gregorian.cxx
index e586470a0c31..9e9b248a5b28 100644
--- a/i18npool/source/calendar/calendar_gregorian.cxx
+++ b/i18npool/source/calendar/calendar_gregorian.cxx
@@ -26,6 +26,7 @@
 #include <com/sun/star/i18n/CalendarDisplayIndex.hpp>
 #include <com/sun/star/i18n/NativeNumberMode.hpp>
 #include <com/sun/star/i18n/reservedWords.hpp>
+#include <comphelper/servicehelper.hxx>
 #include <cppuhelper/supportsservice.hxx>
 #include <o3tl/sprintf.hxx>
 #include <rtl/math.hxx>
@@ -1077,6 +1078,15 @@ Calendar_gregorian::getSupportedServiceNames()
     return aRet;
 }
 
+sal_Int64 Calendar_gregorian::getSomething(css::uno::Sequence<sal_Int8> const & aIdentifier) {
+    return comphelper::getSomethingImpl(aIdentifier, this);
+}
+
+css::uno::Sequence<sal_Int8> const & Calendar_gregorian::getUnoTunnelId() {
+    static comphelper::UnoIdInit const id;
+    return id.getSeq();
+}
+
 }
 
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