github/lidarr
1
0
Fork 0
mirror of https://github.com/lidarr/lidarr.git synced 2025-07-14 00:53:57 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

using compiled delegate instead of reflection in Marr

Browse source
This commit is contained in:
kay.one 2013-06-02 20:15:56 -07:00
parent 9db5b7963e
commit ace98831c7
16 changed files with 170 additions and 388 deletions
Download patch file Download diff file Expand all files Collapse all files

144
Marr.Data/Reflection/SimpleReflectionStrategy.cs
View file

@ -1,5 +1,6 @@
using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Reflection;
namespace Marr.Data.Reflection
@ -8,6 +9,8 @@ namespace Marr.Data.Reflection
{
private static readonly Dictionary<string, MemberInfo> MemberCache = new Dictionary<string, MemberInfo>();
private static readonly Dictionary<string, GetterDelegate> GetterCache = new Dictionary<string, GetterDelegate>();
private static readonly Dictionary<string, SetterDelegate> SetterCache = new Dictionary<string, SetterDelegate>();
private static MemberInfo GetMember(Type entityType, string name)
@ -23,54 +26,6 @@ namespace Marr.Data.Reflection
return member;
}
/// <summary>
/// Sets an entity field value by name to the passed in 'val'.
/// </summary>
public void SetFieldValue<T>(T entity, string fieldName, object val)
{
var member = GetMember(entity.GetType(), fieldName);
try
{
// Handle DB null values
if (val == DBNull.Value)
{
if (member.MemberType == MemberTypes.Field)
{
(member as FieldInfo).SetValue(entity,
ReflectionHelper.GetDefaultValue((member as FieldInfo).FieldType));
}
else if (member.MemberType == MemberTypes.Property)
{
var pi = (member as PropertyInfo);
if (pi.CanWrite)
(member as PropertyInfo).SetValue(entity,
ReflectionHelper.GetDefaultValue(
(member as PropertyInfo).PropertyType), null);
}
}
else
{
if (member.MemberType == MemberTypes.Field)
(member as FieldInfo).SetValue(entity, val);
else if (member.MemberType == MemberTypes.Property)
{
var pi = (member as PropertyInfo);
if (pi.CanWrite)
(member as PropertyInfo).SetValue(entity, val, null);
}
}
}
catch (Exception ex)
{
string msg = string.Format("The DataMapper was unable to load the following field: {0}. \nDetails: {1}", fieldName, ex.Message);
throw new DataMappingException(msg, ex);
}
}
/// <summary>
/// Gets an entity field value by name.
/// </summary>
@ -84,14 +39,14 @@ namespace Marr.Data.Reflection
}
if (member.MemberType == MemberTypes.Property)
{
if ((member as PropertyInfo).CanRead)
return (member as PropertyInfo).GetValue(entity, null);
return BuildGetter(entity.GetType(), fieldName)(entity);
}
throw new DataMappingException(string.Format("The DataMapper could not get the value for {0}.{1}.", entity.GetType().Name, fieldName));
}
/// <summary>
/// Instantiantes a type using the FastReflector library for increased speed.
/// Instantiates a type using the FastReflector library for increased speed.
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
@ -99,5 +54,92 @@ namespace Marr.Data.Reflection
{
return Activator.CreateInstance(type);
}
public GetterDelegate BuildGetter(Type type, string memberName)
{
GetterDelegate getter;
var key = type.FullName + memberName;
if (!GetterCache.TryGetValue(key, out getter))
{
getter = GetPropertyGetter((PropertyInfo)GetMember(type, memberName));
}
return getter;
}
public SetterDelegate BuildSetter(Type type, string memberName)
{
SetterDelegate setter;
var key = type.FullName + memberName;
if (!SetterCache.TryGetValue(key, out setter))
{
setter = GetPropertySetter((PropertyInfo)GetMember(type, memberName));
}
return setter;
}
private static SetterDelegate GetPropertySetter(PropertyInfo propertyInfo)
{
var propertySetMethod = propertyInfo.GetSetMethod();
if (propertySetMethod == null) return null;
#if NO_EXPRESSIONS
return (o, convertedValue) =>
{
propertySetMethod.Invoke(o, new[] { convertedValue });
return;
};
#else
var instance = Expression.Parameter(typeof(object), "i");
var argument = Expression.Parameter(typeof(object), "a");
var instanceParam = Expression.Convert(instance, propertyInfo.DeclaringType);
var valueParam = Expression.Convert(argument, propertyInfo.PropertyType);
var setterCall = Expression.Call(instanceParam, propertyInfo.GetSetMethod(), valueParam);
return Expression.Lambda<SetterDelegate>(setterCall, instance, argument).Compile();
#endif
}
private static GetterDelegate GetPropertyGetter(PropertyInfo propertyInfo)
{
var getMethodInfo = propertyInfo.GetGetMethod();
if (getMethodInfo == null) return null;
#if NO_EXPRESSIONS
return o => propertyInfo.GetGetMethod().Invoke(o, new object[] { });
#else
try
{
var oInstanceParam = Expression.Parameter(typeof(object), "oInstanceParam");
var instanceParam = Expression.Convert(oInstanceParam, propertyInfo.DeclaringType);
var exprCallPropertyGetFn = Expression.Call(instanceParam, getMethodInfo);
var oExprCallPropertyGetFn = Expression.Convert(exprCallPropertyGetFn, typeof(object));
var propertyGetFn = Expression.Lambda<GetterDelegate>
(
oExprCallPropertyGetFn,
oInstanceParam
).Compile();
return propertyGetFn;
}
catch (Exception ex)
{
Console.Write(ex.Message);
throw;
}
#endif
}
}
}