java: added callback functionality

Signed-off-by: Stefan Andritoiu <stefan.andritoiu@intel.com>
Signed-off-by: Andrei Vasiliu <andrei.vasiliu@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/rpr220/rpr220.cxx

@@ -26,6 +26,7 @@
 
 #include "rpr220.h"
 
+
 using namespace upm;
 using namespace std;
 
@@ -55,6 +56,13 @@ bool RPR220::blackDetected()
   return (mraa_gpio_read(m_gpio) ? true : false);
 }
 
+#ifdef SWIGJAVA
+void RPR220::installISR(IsrCallback *cb)
+{
+	installISR(generic_callback_isr, cb);
+}
+#endif
+
 void RPR220::installISR(void (*isr)(void *), void *arg)
 {
   if (m_isrInstalled)