Support default methods on mapper interfaces

I’d like support for default methods on mapper interfaces. Currently if a method is not implemented (even if it is a default method) an exception is thrown:

      if (ms == null) {
        if(method.getAnnotation(Flush.class) != null){
          name = null;
          type = SqlCommandType.FLUSH;
        } else {
          throw new BindingException("Invalid bound statement (not found): " + statementName);
        }
      }

I believe it would be relatively easy to add a type SqlCommandType.ABSTRACT and call the underlying default function.

It is a useful feature because it allows you to put helper methods on mappers.

[harawata]

Never mind. It should be fixed in the latest 3.4.2-SNAPSHOT. Please let me know if it works as you expected.

[kazuki43zoo]

I think supporting default method is good idea!!