Putting it all together

Here's the complete code for this scenario solution:

Figure 1. Complete listing for a façade "list all" method

// ...
  public SomeEntitySummaryDetailsList listSomeEntityDetails()
      throws AppException, InformationalException {

    // create an instance of the return struct
    final SomeEntitySummaryDetailsList list =
      new SomeEntitySummaryDetailsList();

    // retrieve all the instances of the entity
    final Set<SomeEntity> someEntities = someEntityDAO.readAll();

    // map the details returned
    for (final SomeEntity someEntity : someEntities) {
      final SomeEntitySummaryDetails someEntitySummaryDetails =
        new SomeEntitySummaryDetails();
      someEntitySummaryDetails.someEntityID = someEntity.getID();
      someEntitySummaryDetails.name = someEntity.getName();

      list.details.addRef(someEntitySummaryDetails);
    }

    // return to the client
    return list;
  }

Note that the assignment to the someEntities set was shown for clarity only - equivalent terser code is shown below:

Figure 2. Complete listing for a façade "list all" method (terser version)

// ...
  public SomeEntitySummaryDetailsList listSomeEntityDetails()
      throws AppException, InformationalException {

    // create an instance of the return struct
    final SomeEntitySummaryDetailsList list =
      new SomeEntitySummaryDetailsList();

    for (final SomeEntity someEntity : someEntityDAO.readAll()) {
      // map the details returned
      final SomeEntitySummaryDetails someEntitySummaryDetails =
        new SomeEntitySummaryDetails();
      someEntitySummaryDetails.someEntityID = someEntity.getID();
      someEntitySummaryDetails.name = someEntity.getName();

      list.details.addRef(someEntitySummaryDetails);
    }

    // return to the client
    return list;
  }

  // ...