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namespace Simple.Data
{
using System;
using System.Collections;
using System.Collections.Generic;
public class DictionaryCloner
{
public IDictionary<string, object> CloneDictionary(IDictionary<string,object> source)
{
var cloneable = source as ICloneable;
if (cloneable != null)
{
return (IDictionary<string, object>)cloneable.Clone();
}
var dictionary = source as Dictionary<string, object>;
if (dictionary != null)
{
return CloneSystemDictionary(dictionary);
}
return CloneCustomDictionary(source);
}
private IDictionary<string, object> CloneCustomDictionary(IDictionary<string, object> source)
{
var clone = Activator.CreateInstance(source.GetType()) as IDictionary<string, object>;
if (clone == null) throw new InvalidOperationException("Internal data structure cannot be cloned.");
CopyDictionaryAndCloneNestedDictionaries(source, clone);
return clone;
}
private IDictionary<string, object> CloneSystemDictionary(Dictionary<string, object> dictionary)
{
var clone = new Dictionary<string, object>(dictionary.Count, dictionary.Comparer);
CopyDictionaryAndCloneNestedDictionaries(dictionary, clone);
return clone;
}
private void CopyDictionaryAndCloneNestedDictionaries(IEnumerable<KeyValuePair<string, object>> dictionary, IDictionary<string, object> clone)
{
foreach (var keyValuePair in dictionary)
{
clone.Add(keyValuePair.Key, CloneValue(keyValuePair.Value));
}
}
public object CloneValue(object source)
{
if (ReferenceEquals(source, null)) return null;
var nestedDictionaries = source as IEnumerable<IDictionary<string, object>>;
if (nestedDictionaries != null)
{
return CopyNestedDictionaryList(nestedDictionaries, source.GetType());
}
var nestedDictionary = source as IDictionary<string, object>;
return nestedDictionary != null ? CloneDictionary(nestedDictionary) : source;
}
public object CopyNestedDictionaryList(IEnumerable<IDictionary<string, object>> nestedDictionaries, Type collectionType)
{
var collection = Activator.CreateInstance(collectionType) as IList ?? new List<IDictionary<string,object>>();
foreach (var nestedDictionary1 in nestedDictionaries)
{
collection.Add(CloneDictionary(nestedDictionary1));
}
return collection;
}
}
}
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