code: private void initializeEntityConstructor(BeanMetaData bmd) throws EJBConfigurationException {
          try {
              bmd.ivEnterpriseBeanClassConstructor = bmd.enterpriseBeanClass.getConstructor((Class<?>[]) null);
          } catch (NoSuchMethodException e) {
              Tr.error(tc, "JIT_NO_DEFAULT_CTOR_CNTR5007E",
                       new Object[] { bmd.enterpriseBeanClassName, bmd.enterpriseBeanName });
              throw new EJBConfigurationException("CNTR5007E: The " + bmd.enterpriseBeanClassName + " bean class for the " + bmd.enterpriseBeanName +
                                                  " bean does not have a public constructor that does not take parameters.");
          }
      }
docs: Obtain the constructor for the entity bean concrete class.