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fixed memory leak around Oracle BLOBs #196

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fixed memory leak around Oracle BLOBs #196

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316 changes: 161 additions & 155 deletions Source/Mapping/ValueMapping.cs
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Original file line number Diff line number Diff line change
@@ -1,155 +1,161 @@
using System;

using BLToolkit.Common;

using KeyValue = System.Collections.Generic.KeyValuePair<System.Type, System.Type>;
using Table = System.Collections.Generic.Dictionary<System.Collections.Generic.KeyValuePair<System.Type, System.Type>, BLToolkit.Mapping.IValueMapper>;

namespace BLToolkit.Mapping
{
public static class ValueMapping
{
#region Init

private static readonly Table _mappers = new Table();

#endregion

#region Default Mapper

class DefaultValueMapper : IValueMapper
{
public void Map(
IMapDataSource source, object sourceObject, int sourceIndex,
IMapDataDestination dest, object destObject, int destIndex)
{
dest.SetValue(destObject, destIndex, source.GetValue(sourceObject, sourceIndex));

//object o = source.GetValue(sourceObject, sourceIndex);

//if (o == null) dest.SetNull (destObject, destIndex);
//else dest.SetValue(destObject, destIndex, o);
}
}

private static IValueMapper _defaultMapper = new DefaultValueMapper();
[CLSCompliant(false)]
public static IValueMapper DefaultMapper
{
get { return _defaultMapper; }
set { _defaultMapper = value; }
}

#endregion

#region GetMapper

private static readonly object _sync = new object();

[CLSCompliant(false)]
public static IValueMapper GetMapper(Type t1, Type t2)
{
if (t1 == null) t1 = typeof(object);
if (t2 == null) t2 = typeof(object);

if (t1.IsEnum) t1 = Enum.GetUnderlyingType(t1);
if (t2.IsEnum) t2 = Enum.GetUnderlyingType(t2);

var key = new KeyValue(t1, t2);

lock (_sync)
{
IValueMapper t;

if (_mappers.TryGetValue(key, out t))
return t;

//t = BLToolkit.Mapping.ValueMappingInternal.MapperSelector.GetMapper(t1, t2);

if (null == t)
{
var type = typeof(GetSetDataChecker<,>).MakeGenericType(t1, t2);

if (((IGetSetDataChecker)Activator.CreateInstance(type)).Check() == false)
{
t = _defaultMapper;
}
else
{
type = t1 == t2 ?
typeof(ValueMapper<>).MakeGenericType(t1) :
typeof(ValueMapper<,>).MakeGenericType(t1, t2);

t = (IValueMapper)Activator.CreateInstance(type);
}
}

_mappers.Add(key, t);

return t;
}
}

#endregion

#region Generic Mappers

interface IGetSetDataChecker
{
bool Check();
}

class GetSetDataChecker<S,D> : IGetSetDataChecker
{
public bool Check()
{
return
!(MapGetData<S>.I is MapGetData<S>.Default<S>) &&
!(MapSetData<S>.I is MapSetData<S>.Default<S>) &&
!(MapGetData<D>.I is MapGetData<D>.Default<D>) &&
!(MapSetData<D>.I is MapSetData<D>.Default<D>);
}
}

class ValueMapper<T> : IValueMapper
{
public void Map(
IMapDataSource source, object sourceObject, int sourceIndex,
IMapDataDestination dest, object destObject, int destIndex)
{
if (source.IsNull(sourceObject, sourceIndex))
dest.SetNull(destObject, destIndex);
else
{
var setter = MapSetData<T>.I;
var getter = MapGetData<T>.I;

setter.To(dest, destObject, destIndex,
getter.From(source, sourceObject, sourceIndex));
}
}
}

class ValueMapper<S,D> : IValueMapper
{
public void Map(
IMapDataSource source, object sourceObject, int sourceIndex,
IMapDataDestination dest, object destObject, int destIndex)
{
if (source.IsNull(sourceObject, sourceIndex))
dest.SetNull(destObject, destIndex);
else
{
var setter = MapSetData<D>.I;
var getter = MapGetData<S>.I;
var converter = Convert<D,S>.From;

setter.To(dest, destObject, destIndex,
converter(getter.From(source, sourceObject, sourceIndex)));
}
}
}

#endregion
}
}
using System;

using BLToolkit.Common;

using KeyValue = System.Collections.Generic.KeyValuePair<System.Type, System.Type>;
using Table = System.Collections.Generic.Dictionary<System.Collections.Generic.KeyValuePair<System.Type, System.Type>, BLToolkit.Mapping.IValueMapper>;

namespace BLToolkit.Mapping
{
public static class ValueMapping
{
#region Init

private static readonly Table _mappers = new Table();

#endregion

#region Default Mapper

class DefaultValueMapper : IValueMapper
{
public void Map(
IMapDataSource source, object sourceObject, int sourceIndex,
IMapDataDestination dest, object destObject, int destIndex)
{
var val = source.GetValue(sourceObject, sourceIndex);

dest.SetValue(destObject, destIndex, val);

// some objects (like oracle blobs) are disposable
var disp = val as IDisposable;
if (disp != null) disp.Dispose();

//object o = source.GetValue(sourceObject, sourceIndex);

//if (o == null) dest.SetNull (destObject, destIndex);
//else dest.SetValue(destObject, destIndex, o);
}
}

private static IValueMapper _defaultMapper = new DefaultValueMapper();
[CLSCompliant(false)]
public static IValueMapper DefaultMapper
{
get { return _defaultMapper; }
set { _defaultMapper = value; }
}

#endregion

#region GetMapper

private static readonly object _sync = new object();

[CLSCompliant(false)]
public static IValueMapper GetMapper(Type t1, Type t2)
{
if (t1 == null) t1 = typeof(object);
if (t2 == null) t2 = typeof(object);

if (t1.IsEnum) t1 = Enum.GetUnderlyingType(t1);
if (t2.IsEnum) t2 = Enum.GetUnderlyingType(t2);

var key = new KeyValue(t1, t2);

lock (_sync)
{
IValueMapper t;

if (_mappers.TryGetValue(key, out t))
return t;

//t = BLToolkit.Mapping.ValueMappingInternal.MapperSelector.GetMapper(t1, t2);

if (null == t)
{
var type = typeof(GetSetDataChecker<,>).MakeGenericType(t1, t2);

if (((IGetSetDataChecker)Activator.CreateInstance(type)).Check() == false)
{
t = _defaultMapper;
}
else
{
type = t1 == t2 ?
typeof(ValueMapper<>).MakeGenericType(t1) :
typeof(ValueMapper<,>).MakeGenericType(t1, t2);

t = (IValueMapper)Activator.CreateInstance(type);
}
}

_mappers.Add(key, t);

return t;
}
}

#endregion

#region Generic Mappers

interface IGetSetDataChecker
{
bool Check();
}

class GetSetDataChecker<S,D> : IGetSetDataChecker
{
public bool Check()
{
return
!(MapGetData<S>.I is MapGetData<S>.Default<S>) &&
!(MapSetData<S>.I is MapSetData<S>.Default<S>) &&
!(MapGetData<D>.I is MapGetData<D>.Default<D>) &&
!(MapSetData<D>.I is MapSetData<D>.Default<D>);
}
}

class ValueMapper<T> : IValueMapper
{
public void Map(
IMapDataSource source, object sourceObject, int sourceIndex,
IMapDataDestination dest, object destObject, int destIndex)
{
if (source.IsNull(sourceObject, sourceIndex))
dest.SetNull(destObject, destIndex);
else
{
var setter = MapSetData<T>.I;
var getter = MapGetData<T>.I;

setter.To(dest, destObject, destIndex,
getter.From(source, sourceObject, sourceIndex));
}
}
}

class ValueMapper<S,D> : IValueMapper
{
public void Map(
IMapDataSource source, object sourceObject, int sourceIndex,
IMapDataDestination dest, object destObject, int destIndex)
{
if (source.IsNull(sourceObject, sourceIndex))
dest.SetNull(destObject, destIndex);
else
{
var setter = MapSetData<D>.I;
var getter = MapGetData<S>.I;
var converter = Convert<D,S>.From;

setter.To(dest, destObject, destIndex,
converter(getter.From(source, sourceObject, sourceIndex)));
}
}
}

#endregion
}
}