AppEngine datastore query: WHERE statement

When writing AppEngine queries here is the simplest of examples:

    public List<RecipeStep> fetch(Long recipeId)

    { 

checkPersistenceManager();

String query = "SELECT FROM " + RecipeStep.class.getName() + " WHERE recipeId == " + recipeId.longValue();

List<RecipeStep> steps = null;

try

{

    steps = (List<RecipeStep>) pm.newQuery(query).execute(); 

} finally

{

    pm.close();

}

List<RecipeStep> returnList = new ArrayList<RecipeStep>();

for(RecipeStep step: steps)

{

    returnList.add(step);

}

return returnList;

    }