AbstractDynamoDao extends AbstractDao<M,P,K,I> { public void update(K id, Update<P> update, Instant updateAt, I updaterId) { UpdateItemSpec spec = toUpdateItemSpec(id, update, updateAt, updaterId); getTable().updateItem(spec); } 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 testUpdate() throws Exception { TestModel model = dao.create(TestModel.builder().name("Ian").build()); dao.update(model.getId(), dao.updateOf(TestModel.builder().name("Rename").build())); TestModel change = dao.load(model.getId()); assertEquals("Rename", change.getName()); }