Wow, what a great example! I tried it and it passes all my tests. I looked
up [Serializable()] and I think everything I have is ok, so I will
continue with that. It seems to be maintenance free.
Thanks again for the sample.
David.
On Wed, 31 Oct 2007 16:28:02 +0800, =?ISO-8859-1?Q?S=E9bastien_Lorion?=
<[EMAIL PROTECTED]> wrote:
>If your entire object graph is serialisable, my experience up to now
>is that deep cloning is much easier and maintainable using in-memory
>binary serialisation.
>
>public static object DeepClone(object obj)
>{
> if (obj == null)
> return null;
>
> BinaryFormatter bf = new BinaryFormatter();
>
> using (MemoryStream ms = new MemoryStream())
> {
> bf.Serialize(ms, obj);
> ms.Position = 0;
>
> return bf.Deserialize(ms);
> }
>}
>
>Simple unit test:
>
>[Test()]
>public void DeepCloneTest()
>{
> Assert.IsNull(PC.Utilities.DeepClone(null));
>
> DummyCloneable data = new DummyCloneable();
> DummyCloneable clone = (DummyCloneable) PC.Utilities.DeepClone(data);
>
> Assert.IsTrue(data.CheckDeepClone(clone));
>}
>
>[Serializable()]
>private class DummyCloneable
>{
> public int Data1;
> public string Data2;
> public object Data3;
> public List<int> Data4;
> public List<List<int>> Data5;
> public Dictionary<string, object> Data6;
>
> public DummyCloneable()
> {
> Data1 = 123;
> Data2 = "foo";
> Data3 = new object();
> Data4 = new List<int>(new int[] {1, 2, 3, 4, 5});
>
> Data5 = new List<List<int>>();
> Data5.Add(new List<int>(new int[] { 1, 2, 3, 4, 5 }));
> Data5.Add(new List<int>(new int[] { 1, 2, 3, 4, 5 }));
> Data5.Add(new List<int>(new int[] { 1, 2, 3, 4, 5 }));
>
> Data6 = new Dictionary<string, object>();
> Data6["key1"] = "value1";
> Data6["key2"] = 123;
> Data6["key3"] = 123.456D;
> Data6["key4"] = new object();
> Data6["key5"] = Data5;
> }
>
> public bool CheckDeepClone(DummyCloneable obj)
> {
> if (obj.Data1 != this.Data1)
> return false;
>
> if (obj.Data2 != this.Data2)
> return false;
>
> if (obj.Data3.Equals(this.Data3))
> return false;
>
> if (obj.Data4.Equals(this.Data4))
> return false;
>
> for (int i = 0; i < this.Data4.Count; i++)
> if (obj.Data4[i] != this.Data4[i])
> return false;
>
> if (obj.Data5.Equals(this.Data5))
> return false;
>
> for (int i = 0; i < this.Data5.Count; i++)
> {
> if (obj.Data5[i].Equals(this.Data5[i]))
> return false;
>
> for (int j = 0; j < this.Data5[i].Count; j++)
> if (obj.Data5[i][j] != this.Data5[i][j])
> return false;
> }
>
> if (obj.Data6.Equals(this.Data6))
> return false;
>
> if (((string) obj.Data6["key1"]) != ((string) this.Data6["key1"]))
> return false;
>
> if (((int) obj.Data6["key2"]) != ((int) this.Data6["key2"]))
> return false;
>
> if (((double) obj.Data6["key3"]) != ((double) this.Data6["key3"]))
> return false;
>
> if (obj.Data6["key4"].Equals(this.Data6["key4"]))
> return false;
>
> List<List<int>> objValue5 = (List<List<int>>) obj.Data6["key5"];
> List<List<int>> thisValue5 = (List<List<int>>) this.Data6["key5"];
>
> if (objValue5.Equals(thisValue5))
> return false;
>
> if (!objValue5.Equals(obj.Data5))
> return false;
>
> for (int i = 0; i < thisValue5.Count; i++)
> {
> if (objValue5[i].Equals(thisValue5[i]))
> return false;
>
> for (int j = 0; j < thisValue5[i].Count; j++)
> if (objValue5[i][j] != thisValue5[i][j])
> return false;
> }
>
> return true;
> }
>}
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