/// <summary>
/// 子类重写此方法来实现更复杂的复制功能。
/// 默认使用反射进行对象的拷贝。
///
/// 注意：
/// 集合字段，需要直接声明为 <![CDATA[IList<T>]]> 类型才能进行拷贝！！！
/// </summary>
/// <param name="target"></param>
/// <param name="option"></param>
protected virtual void CloneValues(Freezable target, CloneOption option)
{
var isFreeze = this._frozen;
this._frozen = false;
var allfields = this.EnumerateAllFileds();
foreach (var field in allfields)
{
if (field.HasMarked <NonSerializedAttribute>())
{
continue;
}
var value = field.GetValue(target);
//如果是引用对象，则进行深拷贝。
var freezable = value as Freezable;
if (freezable != null)
{
if (option.DeepCloneRef)
{
value = freezable.Clone(option);
}
}
//如果是子对象集合，则进行递归拷贝。
if (value is IList && option.CloneChildren)
{
var fieldValue = field.GetValue(this);
if (fieldValue != null)
{
var myChildren = fieldValue as IList;
if (myChildren == null)
{
throw new NotSupportedException("不支持不能转换为 IList 的字段" + field.Name);
}
if (!myChildren.IsReadOnly)
{
foreach (var item in value as IEnumerable)
{
var freeable = item as Freezable;
if (freeable != null)
{
var newChild = freeable.Clone(option);
myChildren.Add(newChild);
}
}
}
}
continue;
}
field.SetValue(this, value);
}
this._frozen = isFreeze;
}
protected Freezable Clone(CloneOption option)
{
Freezable target = null;
if (!option.CopiedPairs.TryGetValue(this, out target))
{
target = Activator.CreateInstance(this.GetType()) as Freezable;
option.CopiedPairs[this] = target;
target.CloneValues(this, option);
}
return(target);
}