public object GetValue(object obj, string propertyName)
{
if (obj == null)
{
throw new ArgumentNullException("指定的对象为空。");
}
if (obj.GetType() != this.Type)
{
throw new ArgumentException("指定的对象类型与缓存的对象类型不一致。");
}
if (_propertyNames.ContainsKey(propertyName) == false)
{
throw new ArgumentOutOfRangeException("指定的属性名不存在。");
}
PropertyMappingDescription propertyMappingDescription = (PropertyMappingDescription)_propertyNames[propertyName];
if (propertyMappingDescription.CanRead == false)
{
throw new InvalidOperationException("属性 " + propertyName + "不可读。");
}
return(propertyMappingDescription.GetValue(obj));
}
public TypeMappingDescription(Type type)
{
Type = type;
PropertyInfo[] propertyList = Type.GetProperties();
foreach (PropertyInfo property in propertyList)
{
PropertyMappingDescription propertyMappingDescription = new PropertyMappingDescription(property);
_propertyList.Add(propertyMappingDescription);
_propertyNames.Add(property.Name, propertyMappingDescription);
}
}
public void SetValue(object obj, string propertyName, object value)
{
if (obj == null)
{
throw new ArgumentNullException("指定的对象为空。");
}
if (obj.GetType() != this.Type)
{
throw new ArgumentException("指定的对象类型与缓存的对象类型不一致。");
}
if (_propertyNames.ContainsKey(propertyName) == false)
{
throw new ArgumentOutOfRangeException("指定的属性名不存在。");
}
PropertyMappingDescription propertyMappingDescription = (PropertyMappingDescription)_propertyNames[propertyName];
if (propertyMappingDescription.CanWrite == false)
{
throw new InvalidOperationException("属性 " + propertyName + "只读。");
}
Type propertyType = propertyMappingDescription.PropertyInfo.PropertyType;
if (propertyType.IsValueType == false && value != null)
{
Type valueType = value.GetType();
if (propertyType != valueType && valueType.IsSubclassOf(propertyType) == false)
{
throw new ArgumentException("目标对象的 " + propertyName + "与 value 的类型既不一致，也不是目标类型的派生类。");
}
}
propertyMappingDescription.SetValue(obj, value);
}
