framework/tests/all-systems/TypeVarAndArrayRefinement.java

public class TypeVarAndArrayRefinement {

  private <T extends Enum<T>> T getEnumValue(Class<T> enumType, String name) {
    T[] constants = enumType.getEnumConstants();
    if (constants == null) {
      throw new IllegalArgumentException(enumType.getName() + " is not an enum type");
    }
    // previously the constants method was considered nullable mainly because it was an invalid
    // type because when lubbing type variables we didn't copy the declared types on the bounds
    // over to the lub
    for (T constant : constants) {
      if (constant.name().equalsIgnoreCase(name.replace('-', '_'))) {
        return constant;
      }
    }
    // same error that's thrown by Enum.valueOf()
    throw new IllegalArgumentException(
        "No enum constant " + enumType.getCanonicalName() + "." + name);
  }
}