public static Type resolveTypeVariable()

in google-http-client/src/main/java/com/google/api/client/util/Types.java [229:265]
31 lines of code
9 McCabe index (conditional complexity)

  public static Type resolveTypeVariable(List<Type> context, TypeVariable<?> typeVariable) {
    // determine where the type variable was declared
    GenericDeclaration genericDeclaration = typeVariable.getGenericDeclaration();
    if (genericDeclaration instanceof Class<?>) {
      Class<?> rawGenericDeclaration = (Class<?>) genericDeclaration;
      // check if the context extends that declaration
      int contextIndex = context.size();
      ParameterizedType parameterizedType = null;
      while (parameterizedType == null && --contextIndex >= 0) {
        parameterizedType =
            getSuperParameterizedType(context.get(contextIndex), rawGenericDeclaration);
      }
      if (parameterizedType != null) {
        // find the type variable's index in the declaration's type parameters
        TypeVariable<?>[] typeParameters = genericDeclaration.getTypeParameters();
        int index = 0;
        for (; index < typeParameters.length; index++) {
          TypeVariable<?> typeParameter = typeParameters[index];
          if (typeParameter.equals(typeVariable)) {
            break;
          }
        }
        // use that index to get the actual type argument
        Type result = parameterizedType.getActualTypeArguments()[index];
        if (result instanceof TypeVariable<?>) {
          // attempt to resolve type variable
          Type resolve = resolveTypeVariable(context, (TypeVariable<?>) result);
          if (resolve != null) {
            return resolve;
          }
          // partially resolved type variable is okay
        }
        return result;
      }
    }
    return null;
  }