How to use

getGenericsFromInterfaceHierarchy

method

in

sk.seges.acris.core.rebind.RebindUtils

/**
 * Tries to find parametrized type in interface hierarchy of a class.
 * 
 * @param classType
 *            A class having parametrized interface.
 * @param parametrizedType
 *            Interface where parametrized type is present.
 * @param position
 *            Position in a list of parametrized types in interface.
 * @return Generics type in interface implemented by a class type or null if
 *         not found
 */
private static JClassType getGenericsFromInterfaceHierarchy(JClassType classType,
    JClassType parametrizedType, int position) {
  for (JClassType type : classType.getImplementedInterfaces()) {
    if (type instanceof JParameterizedType) {
      JParameterizedType paramType = (JParameterizedType) type;
      if (paramType.getErasedType().equals(parametrizedType.getErasedType())) {
        return paramType.getTypeArgs()[position];
      }
    }
    // seach parent interfaces
    JClassType result = getGenericsFromInterfaceHierarchy(type, parametrizedType, position);
    if (result != null)
      return result;
  }
  return null;
}

/**
 * Tries to find parametrized type in interface of a class.
 * 
 * @param classType
 *            A class having parametrized interface.
 * @param parametrizedType
 *            Interface where parametrized type is present.
 * @param position
 *            Position in a list of parametrized types in interface.
 * @return Generics type in interface implemented by a class type.
 * @throws NotFoundException
 */
public static JClassType getGenericsFromInterfaceType(JClassType classType, JClassType parametrizedType,
    int position) throws NotFoundException {
  JClassType type = getGenericsFromInterfaceHierarchy(classType, parametrizedType, position);
  if (type != null)
    return type;
  if (classType.getSuperclass() != null) {
    return getGenericsFromInterfaceType(classType.getSuperclass(), parametrizedType, position);
  }
  throw new NotFoundException("Unable to find generics in type " + classType
      + ", where parametrized type is " + parametrizedType + " on position " + position);
}