Are you in a situation where you can't use constructor loading of your
objects? If your not using auto-properties (which it seems your not), this
might solve your problem entirely.
On Fri, May 29, 2009 at 8:32 AM, Yaojian <sky...@gmail.com> wrote:
> That is my mistake, the nested objects loaded from the database is not
> touched so they remains its dirty state set by AOP.
>
> I think the simplest solution is to map a column to a field instead of a
> property.
>
> for example, a C# property:
>
> private string m_Name;
>
> public String Name
> {
> get { return m_Name; }
> set { m_Name = value; }
> }
>
> we can map the column "Name" to the "m_Name" field rather than the "Name"
> property in SqlMap:
>
> <result property="m_Name" column="Name" dbType="VarChar"/>
>
> So load object from DB will not fire the dirty tracking injiected by AOP.
>
>
> On Fri, May 29, 2009 at 9:19 PM, Sal Bass <salbass...@hotmail.com> wrote:
>
>>
>> Yaojian,
>>
>> Thanks! I am still confused though. When I make a call to QueryForObject
>> and reset the IsLoading flag to false, that only sets it false for the root
>> object. All complex property collections that are loaded at the same time
>> will not be reset. Am I missing something obvious?
>>
>>
>>
>> ________________________________
>> > Date: Fri, 29 May 2009 03:52:58 +0800
>> > Subject: Re: Dirty Tracking Issue
>> > From: sky...@gmail.com
>> > To: user-cs@ibatis.apache.org
>> >
>> > If the non-root object is loaded from the database, it should be created
>> with the new object factory.
>> > otherwise, it is irrelavant with 'dirty'.
>> >
>> > Bellow is my code for using IObjectFactory, I use a custom
>> IObjectFactory for attaching each object to a context variable.
>> >
>> >
>> >
>> > DomSqlMapBuilder builder = CreateDomSqlMapBuilder();
>> >
>> > //Use SqmObjectFactory for attaching objects to the current
>> IObjectContext
>> > IObjectFactory originalFactory = new ObjectFactory(true);
>> >
>> > SqmObjectFactory contextableFactory = new
>> SqmObjectFactory(originalFactory);
>> > builder.ObjectFactory = contextableFactory;
>> >
>> > ISqlMapper sqlMapper = builder.Configure(m_SqlMapDocument);
>> >
>> >
>> >
>> --------------------------------------------------------------------------------------------------------------------------------------------------
>> >
>> > /// Represents the factory of MDA persistent object used by IBatis.NET.
>> >
>> > /// attaches an
>> > /// to each objects created with this factory.
>> > public class SqmObjectFactory : IObjectFactory, IEntityContextBindable
>> >
>> > {
>> > /// Creates an instance.
>> > /// The original .
>> > public SqmObjectFactory(IObjectFactory objectFactoryImpl)
>> >
>> > {
>> > if (objectFactoryImpl == null) throw new
>> ArgumentNullException("objectFactoryImpl");
>> > m_ObjectFactoryImpl = objectFactoryImpl;
>> > }
>> >
>> > private readonly IObjectFactory m_ObjectFactoryImpl;
>> >
>> >
>> > private IEntityContext m_EntityContext;
>> >
>> > public IEntityContext EntityContext
>> > {
>> > get { return m_EntityContext; }
>> > set { m_EntityContext = value; }
>> > }
>> >
>> >
>> > /// .
>> > public IFactory CreateFactory(Type typeToCreate, Type[] types)
>> > {
>> > IFactory result = m_ObjectFactoryImpl.CreateFactory(typeToCreate,
>> types);
>> >
>> > if (typeof(IEntityContextBindable).IsAssignableFrom(typeToCreate))
>> > {
>> > return new SqmFactory(this, result);
>> > }
>> > return result;
>> > }
>> >
>> > private class SqmFactory : IFactory
>> >
>> > {
>> > public SqmFactory(IEntityContextBindable objectContextable, IFactory
>> factory)
>> > {
>> > if (objectContextable == null) throw new
>> ArgumentNullException("objectContextable");
>> >
>> > if (factory == null) throw new ArgumentNullException("factory");
>> >
>> > m_ObjectContextable = objectContextable;
>> > m_Factory = factory;
>> > }
>> >
>> > private readonly IEntityContextBindable m_ObjectContextable;
>> >
>> >
>> > private readonly IFactory m_Factory;
>> >
>> > public object CreateInstance(object[] parameters)
>> > {
>> > Object result = m_Factory.CreateInstance(parameters);
>> > ((IEntityContextBindable)result).EntityContext =
>> m_ObjectContextable.EntityContext;
>> >
>> > return result;
>> > }
>> > }
>> > }
>> >
>> >
>> > On Fri, May 29, 2009 at 3:45 AM, Sal Bass> wrote:
>> >
>> >
>> >
>> > Yes, I explored that. But how will that work for the complex properties?
>> Only the root object would know it's in a loading state.
>> >
>> >
>> >
>> >
>> >
>> > ________________________________
>> >
>> >> Date: Fri, 29 May 2009 02:22:33 +0800
>> >
>> >> Subject: Re: Dirty Tracking Issue
>> >
>> >> From: sky...@gmail.com
>> >
>> >> To: user-cs@ibatis.apache.org
>> >
>> >>
>> >
>> >> We can bypass to set 'dirty' if the AOP generation mechanism can know
>> an object is in 'loading' state.
>> >
>> >>
>> >
>> >> We can use a custom IBatisNet.Common.Utilities.IObjectFactory to mark
>> an object 'loading'.
>> >
>> >>
>> >
>> >> And we can use a wrapped ISqlMapper to clean the 'loading' flag as:
>> >
>> >>
>> >
>> >> public object QueryForObject(string statementName, object
>> parameterObject) {
>> >
>> >> Object result = originalSqlMapper.QueryForObject(...);
>> >
>> >>
>> >
>> >> result.IsLoading = false;
>> >
>> >> return result;
>> >
>> >> }
>> >
>> >>
>> >
>> >>
>> >
>> >> Yaojian
>> >
>> >>
>> >
>> >> On Fri, May 29, 2009 at 1:55 AM, Sal Bass> wrote:
>> >
>> >>
>> >
>> >>
>> >
>> >>
>> >
>> >> I am having a dilema with implementing dirty tracking on my entities. I
>> am using AOP to mark an entity as "dirty" when a property is set. The
>> problem occurs when I load the entities using Ibatis because it sets the
>> properties during mapping which makes the entity dirty (no, I can't use
>> constructor mapping here). So, I use a RowDelegate to mark the entity clean
>> before returning it. Works great....except for when I am loading a root
>> object with several complex properties (ILists of other entities). The
>> RowDelegate is obviously not fired for each complex property, so they are
>> returned as dirty.
>> >
>> >
>> >>
>> >
>> >>
>> >
>> >>
>> >
>> >>
>> >
>> >> Any idea of how I can get at all of the complex properties to mark them
>> clean before returning the entity?
>> >
>> >>
>> >
>> >>
>> >
>> >>
>> >
>> >>
>> >
>> >>
>> >
>> >>
>> >
>> >>
>> >
>> >> _________________________________________________________________
>> >
>> >>
>> >
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>> >
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>> >>
>> >
>> >>
>> >
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>> >
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>> >
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>> >
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>
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