#region Apache Notice
/*****************************************************************************
* $Revision: 374175 $
* $LastChangedDate: 2006-04-30 18:01:40 +0200 (dim., 30 avr. 2006) $
* $LastChangedBy: gbayon $
*
* iBATIS.NET Data Mapper
* Copyright (C) 2006/2005 - The Apache Software Foundation
*
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
********************************************************************************/
#endregion
using System;
using System.Collections;
using System.Collections.Specialized;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.CompilerServices;
using System.Text;
using IBatisNet.Common.Exceptions;
namespace IBatisNet.Common.Utilities.Objects.Members{
/// <summary>
/// A factory to build <see cref="SetAccessorFactory"/> for a type.
/// </summary>
public class SetAccessorFactory : ISetAccessorFactory
{
private delegate ISetAccessor CreatePropertySetAccessor(Type targetType, string propertyName);
private delegate ISetAccessor CreateFieldSetAccessor(Type targetType, string fieldName);
private CreatePropertySetAccessor _createPropertySetAccessor = null;
private CreateFieldSetAccessor _createFieldSetAccessor = null;
private IDictionary _cachedISetAccessor = new HybridDictionary();
private AssemblyBuilder _assemblyBuilder = null;
private ModuleBuilder _moduleBuilder = null;
private object _syncObject = new object();
/// <summary>
/// Initializes a new instance of the <see cref="SetAccessorFactory"/> class.
/// </summary>
/// <param name="allowCodeGeneration">if set to <c>true</c> [allow code generation].</param>
public SetAccessorFactory(bool allowCodeGeneration)
{
if (allowCodeGeneration)
{
// Detect runtime environment and create the appropriate factory
if (Environment.Version.Major >= 2)
{
#if dotnet2
_createPropertySetAccessor = new CreatePropertySetAccessor(CreateDynamicPropertySetAccessor);
_createFieldSetAccessor = new CreateFieldSetAccessor(CreateDynamicFieldSetAccessor);
#endif
}
else
{
AssemblyName assemblyName = new AssemblyName();
assemblyName.Name = "iBATIS.FastSetAccessor" + HashCodeProvider.GetIdentityHashCode(this).ToString();
// Create a new assembly with one module
_assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
_moduleBuilder = _assemblyBuilder.DefineDynamicModule(assemblyName.Name + ".dll");
_createPropertySetAccessor = new CreatePropertySetAccessor(CreatePropertyAccessor);
_createFieldSetAccessor = new CreateFieldSetAccessor(CreateFieldAccessor);
}
}
else
{
_createPropertySetAccessor = new CreatePropertySetAccessor(CreateReflectionPropertySetAccessor);
_createFieldSetAccessor = new CreateFieldSetAccessor(CreateReflectionFieldSetAccessor);
}
}
#if dotnet2
/// <summary>
/// Create a Dynamic ISetAccessor instance for a property
/// </summary>
/// <param name="targetType">Target object type.</param>
/// <param name="propertyName">Property name.</param>
/// <returns>null if the generation fail</returns>
private ISetAccessor CreateDynamicPropertySetAccessor(Type targetType, string propertyName)
{
ReflectionInfo reflectionCache = ReflectionInfo.GetInstance(targetType);
PropertyInfo propertyInfo = (PropertyInfo)reflectionCache.GetSetter(propertyName);
if (propertyInfo.CanWrite)
{
MethodInfo methodInfo = null;
#if dotnet2
methodInfo = propertyInfo.GetSetMethod();
#else
methodInfo = targetType.GetMethod("set_" + propertyName);
#endif
if (methodInfo!=null)// == visibilty public
{
return new DelegatePropertySetAccessor(targetType, propertyName);
}
else
{
return new ReflectionPropertySetAccessor(targetType, propertyName);
}
}
else
{
throw new NotSupportedException(
string.Format("Property \"{0}\" on type "
+ "{1} cannot be set.", propertyInfo.Name, targetType));
}
}
/// <summary>
/// Create a Dynamic ISetAccessor instance for a field
/// </summary>
/// <param name="targetType">Target object type.</param>
/// <param name="fieldName">field name.</param>
/// <returns>null if the generation fail</returns>
private ISetAccessor CreateDynamicFieldSetAccessor(Type targetType, string fieldName)
{
ReflectionInfo reflectionCache = ReflectionInfo.GetInstance(targetType);
FieldInfo fieldInfo = (FieldInfo)reflectionCache.GetSetter(fieldName);
if (fieldInfo.IsPublic)
{
return new DelegateFieldSetAccessor(targetType, fieldName);
}
else
{
return new ReflectionFieldSetAccessor(targetType, fieldName);
}
}
#endif
/// <summary>
/// Create a ISetAccessor instance for a property
/// </summary>
/// <param name="targetType">Target object type.</param>
/// <param name="propertyName">Property name.</param>
/// <returns>null if the generation fail</returns>
private ISetAccessor CreatePropertyAccessor(Type targetType, string propertyName)
{
ReflectionInfo reflectionCache = ReflectionInfo.GetInstance(targetType);
PropertyInfo propertyInfo = (PropertyInfo)reflectionCache.GetSetter(propertyName);
if (propertyInfo.CanWrite)
{
MethodInfo methodInfo = null;
#if dotnet2
methodInfo = propertyInfo.GetSetMethod();
#else
methodInfo = targetType.GetMethod("set_" + propertyName,BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly);
if (methodInfo == null)
{
methodInfo = targetType.GetMethod("set_" + propertyName);
}
#endif
if (methodInfo != null)// == visibilty public
{
return new EmitPropertySetAccessor(targetType, propertyName, _assemblyBuilder, _moduleBuilder);
}
else
{
return new ReflectionPropertySetAccessor(targetType, propertyName);
}
}
else
{
throw new NotSupportedException(
string.Format("Property \"{0}\" on type "
+ "{1} cannot be set.", propertyInfo.Name, targetType));
}
}
/// <summary>
/// Create a ISetAccessor instance for a field
/// </summary>
/// <param name="targetType">Target object type.</param>
/// <param name="fieldName">Field name.</param>
/// <returns>null if the generation fail</returns>
private ISetAccessor CreateFieldAccessor(Type targetType, string fieldName)
{
ReflectionInfo reflectionCache = ReflectionInfo.GetInstance(targetType);
FieldInfo fieldInfo = (FieldInfo)reflectionCache.GetSetter(fieldName);
if (fieldInfo.IsPublic)
{
return new EmitFieldSetAccessor(targetType, fieldName, _assemblyBuilder, _moduleBuilder);
}
else
{
return new ReflectionFieldSetAccessor(targetType, fieldName);
}
}
/// <summary>
/// Create a Reflection ISetAccessor instance for a property
/// </summary>
/// <param name="targetType">Target object type.</param>
/// <param name="propertyName">Property name.</param>
/// <returns>null if the generation fail</returns>
private ISetAccessor CreateReflectionPropertySetAccessor(Type targetType, string propertyName)
{
return new ReflectionPropertySetAccessor(targetType, propertyName);
}
/// <summary>
/// Create Reflection ISetAccessor instance for a field
/// </summary>
/// <param name="targetType">Target object type.</param>
/// <param name="fieldName">field name.</param>
/// <returns>null if the generation fail</returns>
private ISetAccessor CreateReflectionFieldSetAccessor(Type targetType, string fieldName)
{
return new ReflectionFieldSetAccessor(targetType, fieldName);
}
#region ISetAccessorFactory Members
/// <summary>
/// Generate an <see cref="ISetAccessor"/> instance.
/// </summary>
/// <param name="targetType">Target object type.</param>
/// <param name="name">Field or Property name.</param>
/// <returns>null if the generation fail</returns>
[MethodImpl(MethodImplOptions.Synchronized)]
public ISetAccessor CreateSetAccessor(Type targetType, string name)
{
string key = new StringBuilder(targetType.FullName).Append(".").Append(name).ToString();
if (_cachedISetAccessor.Contains(key))
{
return (ISetAccessor)_cachedISetAccessor[key];
}
else
{
ISetAccessor setAccessor = null;
lock (_syncObject)
{
if (!_cachedISetAccessor.Contains(key))
{
// Property
ReflectionInfo reflectionCache = ReflectionInfo.GetInstance(targetType);
MemberInfo memberInfo = reflectionCache.GetSetter(name);
if (memberInfo != null)
{
if (memberInfo is PropertyInfo)
{
setAccessor = _createPropertySetAccessor(targetType, name);
_cachedISetAccessor[key] = setAccessor;
}
else
{
setAccessor = _createFieldSetAccessor(targetType, name);
_cachedISetAccessor[key] = setAccessor;
}
}
else
{
throw new ProbeException(
string.Format("No property or field named \"{0}\" exists for type "
+ "{1}.", name, targetType));
}
}
else
{
setAccessor = (ISetAccessor)_cachedISetAccessor[key];
}
}
return setAccessor;
}
}
#endregion
}
}
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