public static FastPropertyGetHandler GetPropertyGetter(PropertyInfo propInfo)
{
lock (dictGetter)
{
if (dictGetter.ContainsKey(propInfo))
{
return((FastPropertyGetHandler)dictGetter[propInfo]);
}
DynamicMethod dynamicMethod = new DynamicMethod(string.Empty, typeof(object), new Type[] { typeof(object) }, propInfo.DeclaringType.Module);
ILGenerator ilGenerator = dynamicMethod.GetILGenerator();
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.EmitCall(OpCodes.Callvirt, propInfo.GetGetMethod(), null);
EmitBoxIfNeeded(ilGenerator, propInfo.PropertyType);
ilGenerator.Emit(OpCodes.Ret);
FastPropertyGetHandler getter = (FastPropertyGetHandler)dynamicMethod.CreateDelegate(typeof(FastPropertyGetHandler));
dictGetter.Add(propInfo, getter);
return(getter);
}
}
public static FastPropertyGetHandler GetPropertyGetter(PropertyInfo propInfo)
{
lock (dictGetter)
{
if (dictGetter.ContainsKey(propInfo))
{
return((FastPropertyGetHandler)dictGetter[propInfo]);
}
// generates a dynamic method to generate a FastPropertyGetHandler delegate
DynamicMethod dynamicMethod = new DynamicMethod(string.Empty, typeof(object), new Type[] { typeof(object) }, propInfo.DeclaringType.Module);
ILGenerator ilGenerator = dynamicMethod.GetILGenerator();
// loads the object into the stack
ilGenerator.Emit(OpCodes.Ldarg_0);
// calls the getter
ilGenerator.EmitCall(OpCodes.Callvirt, propInfo.GetGetMethod(), null);
// creates code for handling the return value
EmitBoxIfNeeded(ilGenerator, propInfo.PropertyType);
// returns the value to the caller
ilGenerator.Emit(OpCodes.Ret);
// converts the DynamicMethod to a FastPropertyGetHandler delegate to get the property
FastPropertyGetHandler getter = (FastPropertyGetHandler)dynamicMethod.CreateDelegate(typeof(FastPropertyGetHandler));
dictGetter.Add(propInfo, getter);
return(getter);
}
}
/// <summary>
/// 快速获取属性值
/// </summary>
/// <param name="obj"></param>
/// <param name="property"></param>
/// <returns></returns>
public static object GetPropertyValue(object obj, PropertyInfo property)
{
if (!property.CanRead)
{
return(null);
}
FastPropertyGetHandler getter = DynamicCalls.GetPropertyGetter(property);
return(getter(obj));
}
public void GetPropertyGetterTest()
{
PropertyInfo propInfo = null; // TODO: 初始化为适当的值
FastPropertyGetHandler expected = null; // TODO: 初始化为适当的值
FastPropertyGetHandler actual;
actual = DynamicCalls.GetPropertyGetter(propInfo);
Assert.AreEqual(expected, actual);
Assert.Inconclusive("验证此测试方法的正确性。");
}
public PropertyHandler(PropertyInfo property)
{
if (property.CanWrite)
{
this.mSetValue = DynamicCalls.GetPropertySetter(property);
}
if (property.CanRead)
{
this.mGetValue = DynamicCalls.GetPropertyGetter(property);
}
this.mProperty = property;
}
public PropertyHandler(PropertyInfo property)
{
if (property.CanWrite)
{
this.mSetValue = DynamicCalls.GetPropertySetter(property);
}
if (property.CanRead)
{
this.mGetValue = DynamicCalls.GetPropertyGetter(property);
}
this.mProperty = property;
}
/// <summary>
/// 快速获取属性值
/// </summary>
/// <param name="obj"></param>
/// <param name="property"></param>
/// <returns></returns>
public static object GetPropertyValue(object obj, PropertyInfo property)
{
if (obj == null)
{
return(null);
}
if (!property.CanRead)
{
return(null);
}
try
{
FastPropertyGetHandler getter = DynamicCalls.GetPropertyGetter(property);
return(getter(obj));
}
catch (Exception ex)
{
throw ex;
}
}
public DTOProperty(PropertyInfo info, FastPropertySetHandler handler, FastPropertyGetHandler getHandler)
: this(info, handler)
{
GetHandler = getHandler;
}