Spring PropertiesPropertySource

public class PropertiesPropertySource extends MapPropertySource {

   @SuppressWarnings({"rawtypes", "unchecked"})
   public PropertiesPropertySource(String name, Properties source) {
      super(name, (Map) source);
   }

   protected PropertiesPropertySource(String name, Map<String, Object> source) {
      super(name, source);
   }


   @Override
   public String[] getPropertyNames() {
      synchronized (this.source) {
         return super.getPropertyNames();
      }
   }

}