Deserialisation of enums does not respect ordering #117
Description
Deserialisation of enums is to a Set field on ValueTypeSchema. This is created as a HashSet which leads to unpredictable ordering. Here is a (failing) test case:
public void testEnumArrayDeserializationOrdering() throws Exception {
final String jsonSchema = "{\n" +
" \"type\": \"object\",\n" +
" \"id\": \"https://foo.bar/wibble\",\n" +
" \"$schema\": \"http://json-schema.org/draft-03/schema#\",\n" +
" \"properties\": {\n" +
" \"testOptions\": {\n" +
" \"type\": \"array\",\n" +
" \"id\": \"testOptions\",\n" +
" \"required\":true,\n" +
" \"items\": {\n" +
" \"type\": \"string\",\n" +
" \"enum\": [\n" +
" \"Section 1 'Macaroni and Cheese'\",\n" +
" \"Section 2 'Spaghetti and Meatballs'\",\n" +
" \"Section 3 'Fish and Chips'\",\n" +
" \"Section 4 'Sausage and Mash'\"\n" +
" ]\n" +
" },\n" +
" \"minItems\": 1\n" +
" }\n" +
" }\n" +
"}";
ObjectMapper mapper = new ObjectMapper();
JsonNode jsonNode = mapper.readTree(jsonSchema);
JsonSchema deserialized = mapper.convertValue(jsonNode, JsonSchema.class);
ArraySchema testOptionsSchema = deserialized.asObjectSchema().getProperties().get("testOptions").asArraySchema();
ValueTypeSchema testOptionItemsSchema = testOptionsSchema.getItems().asSingleItems().getSchema().asValueTypeSchema();
Iterator<String> enumSet = testOptionItemsSchema.getEnums().iterator();
assertEquals("Expect enum options in order", "Section 1 'Macaroni and Cheese'", enumSet.next());
assertEquals("Expect enum options in order", "Section 2 'Spaghetti and Meatballs'", enumSet.next());
assertEquals("Expect enum options in order", "Section 3 'Fish and Chips'", enumSet.next());
assertEquals("Expect enum options in order", "Section 4 'Sausage and Mash'", enumSet.next());
}