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Lidarr/Marr.Data/Reflection/CachedReflectionStrategy.cs

85 lines
3.1 KiB

using System;
using System.Reflection;
using Fasterflect;
namespace Marr.Data.Reflection
{
public class CachedReflectionStrategy : IReflectionStrategy
{
/// <summary>
/// Sets an entity field value by name to the passed in 'val'.
/// </summary>
public void SetFieldValue<T>(T entity, string fieldName, object val)
{
MemberInfo member = entity.GetType().GetMember(fieldName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)[0];
try
{
// Handle DB null values
if (val == DBNull.Value)
{
if (member.MemberType == MemberTypes.Field)
{
entity.SetFieldValue(member.Name, ReflectionHelper.GetDefaultValue(((FieldInfo)member).FieldType));
}
else if (member.MemberType == MemberTypes.Property)
{
var pi = (PropertyInfo)member;
if (pi.CanWrite)
{
entity.SetPropertyValue(member.Name, ReflectionHelper.GetDefaultValue(((PropertyInfo)member).PropertyType));
}
}
}
else
{
if (member.MemberType == MemberTypes.Field)
{
entity.SetFieldValue(member.Name, val);
}
else if (member.MemberType == MemberTypes.Property && ((PropertyInfo)member).CanWrite)
{
member.Set(entity, val);
}
}
}
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>
public object GetFieldValue(object entity, string fieldName)
{
MemberInfo member = entity.GetType().GetMember(fieldName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)[0];
if (member.MemberType == MemberTypes.Field)
{
return entity.GetFieldValue(member.Name);
}
if (member.MemberType == MemberTypes.Property && ((PropertyInfo)member).CanRead)
{
return entity.GetPropertyValue(member.Name);
}
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.
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public object CreateInstance(Type type)
{
return type.CreateInstance();
}
}
}