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Mapping Oracle UDT containing associative array in C#

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问题 I am working on a small training project which directed me to create an Oracle UDT that contains an associative array. The array is defined as follows: create or replace TYPE TRNG_AUTHORS_TAB AS TABLE OF VARCHAR2(50) ; The UDT then uses this as follows: create or replace TYPE TRNG_BOOK_OBJ AUTHID DEFINER AS OBJECT ( <SNIP normal variable mappings> AUTHORS TRNG_AUTHORS_TAB ) NOT FINAL; Now I am mapping this to a C# class. The TRNG_BOOK_OBJ is mapped as a UDT with an appropriate Factory. I

Mapping Oracle UDT containing associative array in C#

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PHP MVC: Data Mapper pattern: class design

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问题 I have a web MVC application with domain objects and data mappers. The class methods of the data mappers contain all database querying logic. I'm trying to avoid mirroring any database structure and, therefore, to achieve the maximum flexibility in constructing the sql statements. So, in principle, I'm trying to not make use of any ORM or ActiveRecord structure/pattern AT ALL. Let me give you an example: Normally, I could have an abstract class AbstractDataMapper inherited by all specific

What's the difference between DAO and Data Mapper

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问题 Is there a difference between the DAO pattern and the Data Mapper pattern? Is DAO just one of doing Data Mapper? 回答1: I wouldn't actually call DAO a "pattern". As I see it, DAO is pretty much what it is -- a Data Access Object", which encapsulates the details of accessing a persistent data store and generally speaking has nothing to do with the database: interface IBlogDaoService { Blog GetBlog(long id); void SaveBlog(Blog blog); } It's clear that implementations can use either DB (in which

What's the difference between DAO and Data Mapper

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Is there a difference between the DAO pattern and the Data Mapper pattern? Is DAO just one of doing Data Mapper? I wouldn't actually call DAO a "pattern". As I see it, DAO is pretty much what it is -- a Data Access Object", which encapsulates the details of accessing a persistent data store and generally speaking has nothing to do with the database: interface IBlogDaoService { Blog GetBlog(long id); void SaveBlog(Blog blog); } It's clear that implementations can use either DB (in which case it's quite logical to use a Data Mapper), or simple XML file storage mechanism. The Data Mapper on the

How to map collections in Dozer

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I'd like to do something like: ArrayList<CustomObject> objects = new ArrayList<CustomObject>(); ... DozerBeanMapper MAPPER = new DozerBeanMapper(); ... ArrayList<NewObject> newObjects = MAPPER.map(objects, ...); Assuming: <mapping> <class-a>com.me.CustomObject</class-a> <class-b>com.me.NewObject</class-b> <field> <a>id</a> <b>id2</b> </field> </mapping> I tried : ArrayList<NewObject> holder = new ArrayList<NewObject>(); MAPPER.map(objects, holder); but the holder object is empty. I also played with changing the second argument without any luck... Stephane Grenier To quote: "Nested collections

How to map collections in Dozer

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问题 I'd like to do something like: ArrayList<CustomObject> objects = new ArrayList<CustomObject>(); ... DozerBeanMapper MAPPER = new DozerBeanMapper(); ... ArrayList<NewObject> newObjects = MAPPER.map(objects, ...); Assuming: <mapping> <class-a>com.me.CustomObject</class-a> <class-b>com.me.NewObject</class-b> <field> <a>id</a> <b>id2</b> </field> </mapping> I tried : ArrayList<NewObject> holder = new ArrayList<NewObject>(); MAPPER.map(objects, holder); but the holder object is empty. I also