AbstractDynamoDao extends AbstractDao<M,P,K,I> { protected Results<M,K> findByIndex(String indexName, QuerySpec spec) { Index index = getTable().getIndex(indexName); List<M> results = new ArrayList<>(); for (Item item : index.query(spec)) { results.add(modelMapper.toObject(item)); } return Results.of(results); } AbstractDynamoDao(Class<M> modelClass, Class<P> partialClass, AmazonDynamoDB db, String tableName);  AbstractDynamoDao(Class<M> modelClass, Class<P> partialClass, AmazonDynamoDB db, String tableName, ItemMapper<M> modelMapper, ItemMapper<P> partialMapper); String getTableName(); Table getTable(); Optional<M> loadOpt(K id); Optional<P> loadOpt(K id, Iterable<String> fields); @Override Iterable<M> iterateAll(); Results<M,K> scanAll(); @Override M create(P partial, Instant createAt, I creatorId); void update(K id, Update<P> update, Instant updateAt, I updaterId); M updateAndReturn(K id, Update<P> update, Instant updateAt, I updaterId); Update<P> updateOf(P partial); Update<P> updateOf(P partial, Iterable<String> removeFields); @Override void delete(K id); abstract List<KeySchemaElement> getKeySchema(); abstract List<AttributeDefinition> getAttributeDefinitions(); List<GlobalSecondaryIndex> getGlobalSecondaryIndexes(); void initTable(); void dropTable(); void copyTable(AmazonDynamoDB sourceDb, String sourceTable); void ensureIndexes();  }
@Test public void testFindByIndex() throws Exception { populateSampleData(); QuerySpec spec = new QuerySpec() .withKeyConditionExpression("email = :email") .withValueMap(new ValueMap().with(":email", "bob@example.com")); Results<TestModel,UUID> results = dao.findByIndex("email", spec); assertEquals("bob@example.com", results.getData().get(0).getEmail()); assertEquals(1, results.getData().size()); }