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Code Issues Projects Releases Packages Wiki Activity Actions 2

value injector should map lazy loaded values properly.

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This commit is contained in:
kay.one 2013-05-31 19:49:15 -07:00
commit e5cc0c1a93
13 changed files with 163 additions and 267 deletions
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53
Marr.Data/LazyLoaded.cs
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@ -1,14 +1,11 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.Common;
namespace Marr.Data
{
public interface ILazyLoaded : ICloneable
{
void Prepare(Func<IDataMapper> dbCreator, object parent);
bool IsLoaded { get; }
void Prepare(Func<IDataMapper> dataMapperFactory, object parent);
void LazyLoad();
}
@ -18,8 +15,7 @@ namespace Marr.Data
/// <typeparam name="TChild"></typeparam>
public class LazyLoaded<TChild> : ILazyLoaded
{
protected TChild _child;
protected bool _isLoaded;
protected TChild _value;
public LazyLoaded()
{
@ -27,8 +23,8 @@ namespace Marr.Data
public LazyLoaded(TChild val)
{
_child = val;
_isLoaded = true;
_value = val;
IsLoaded = true;
}
public TChild Value
@ -36,11 +32,13 @@ namespace Marr.Data
get
{
LazyLoad();
return _child;
return _value;
}
}
public virtual void Prepare(Func<IDataMapper> dbCreator, object parent)
public bool IsLoaded { get; protected set; }
public virtual void Prepare(Func<IDataMapper> dataMapperFactory, object parent)
{ }
public virtual void LazyLoad()
@ -50,7 +48,7 @@ namespace Marr.Data
{
return new LazyLoaded<TChild>(val);
}
public static implicit operator TChild(LazyLoaded<TChild> lazy)
{
return lazy.Value;
@ -58,7 +56,7 @@ namespace Marr.Data
public object Clone()
{
return this.MemberwiseClone();
return MemberwiseClone();
}
}
@ -70,7 +68,7 @@ namespace Marr.Data
internal class LazyLoaded<TParent, TChild> : LazyLoaded<TChild>
{
private TParent _parent;
private Func<IDataMapper> _dbCreator;
private Func<IDataMapper> _dbMapperFactory;
private readonly Func<IDataMapper, TParent, TChild> _query;
private readonly Func<TParent, bool> _condition;
@ -81,46 +79,41 @@ namespace Marr.Data
_condition = condition;
}
public LazyLoaded(TChild val)
public LazyLoaded(TChild val)
: base(val)
{
_child = val;
_isLoaded = true;
_value = val;
IsLoaded = true;
}
/// <summary>
/// The second part of the initialization happens when the entity is being built.
/// </summary>
/// <param name="dbCreator">Knows how to instantiate a new IDataMapper.</param>
/// <param name="dataMapperFactory">Knows how to instantiate a new IDataMapper.</param>
/// <param name="parent">The parent entity.</param>
public override void Prepare(Func<IDataMapper> dbCreator, object parent)
public override void Prepare(Func<IDataMapper> dataMapperFactory, object parent)
{
_dbCreator = dbCreator;
_dbMapperFactory = dataMapperFactory;
_parent = (TParent)parent;
}
public bool IsLoaded
{
get { return _isLoaded; }
}
public override void LazyLoad()
{
if (!_isLoaded)
if (!IsLoaded)
{
if (_condition != null && _condition(_parent))
{
using (IDataMapper db = _dbCreator())
using (IDataMapper db = _dbMapperFactory())
{
_child = _query(db, _parent);
_value = _query(db, _parent);
}
}
else
{
_child = default(TChild);
_value = default(TChild);
}
_isLoaded = true;
IsLoaded = true;
}
}