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/* ****************************************************************************

*

* Copyright (c) Microsoft Corporation.

*

* This source code is subject to terms and conditions of the Apache License, Version 2.0. A

* copy of the license can be found in the License.html file at the root of this distribution. If

* you cannot locate the Apache License, Version 2.0, please send an email to

* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound

* by the terms of the Apache License, Version 2.0.

*

* You must not remove this notice, or any other, from this software.

*

*

* ***************************************************************************/

using System;

using System.Collections;

using System.Collections.Generic;

using System.Threading;

using Microsoft.Scripting.Runtime;

using IronPython.Runtime;

namespace IronPythonTest {

[Serializable]

internal class StringDictionaryStorage : DictionaryStorage {

private readonly IDictionary<string, object>/*!*/ _dict; // the underlying dictionary

private Dictionary<object, object> _objDict;

public StringDictionaryStorage(IDictionary<string, object>/*!*/ dict) {

_dict = dict;

}

public StringDictionaryStorage(IDictionary<string, object> dict, Dictionary<object, object> objDict) {

_dict = dict;

_objDict = objDict;

}

public override void Add(ref DictionaryStorage storage, object key, object value) {

lock (this) {

string strKey = key as string;

if (strKey != null) {

_dict[strKey] = value;

} else {

EnsureObjectDictionary();

_objDict[CustomStringDictionary.NullToObj(key)] = value;

}

}

}

public override bool Contains(object key) {

lock (this) {

string strKey = key as string;

if (strKey != null) {

return _dict.ContainsKey(strKey);

}

if (_objDict != null) {

return _objDict.ContainsKey(CustomStringDictionary.NullToObj(key));

}

return false;

}

}

public override bool Remove(ref DictionaryStorage storage, object key) {

lock (this) {

string strKey = key as string;

if (strKey != null) {

return _dict.Remove(strKey);

}

if (_objDict != null) {

return _objDict.Remove(CustomStringDictionary.NullToObj(key));

}

return false;

}

}

public override bool TryGetValue(object key, out object value) {

lock (this) {

string strKey = key as string;

if (strKey != null) {

return _dict.TryGetValue(strKey, out value);

}

if (_objDict != null) {

return _objDict.TryGetValue(CustomStringDictionary.NullToObj(key), out value);

}

value = null;

return false;

}

}

public override int Count {

get {

lock (this) {

int count = _dict.Count;

if (_objDict != null) {

count += _objDict.Count;

}

return count;

}

}

}

public override void Clear(ref DictionaryStorage storage) {

lock (this) {

_dict.Clear();

if (_objDict != null) {

_objDict.Clear();

}

}

}

public override List<KeyValuePair<object, object>> GetItems() {

List<KeyValuePair<object, object>> res = new List<KeyValuePair<object, object>>();

lock (this) {

foreach (KeyValuePair<string, object> kvp in _dict) {

res.Add(new KeyValuePair<object, object>(kvp.Key, kvp.Value));

}

if (_objDict != null) {

foreach (KeyValuePair<object, object> kvp in _objDict) {

res.Add(kvp);

}

}

}

return res;

}

public override DictionaryStorage Clone() {

lock (this) {

IDictionary<string, object> dict;

#if !SILVERLIGHT

ICloneable cloneable = _dict as ICloneable;

if (_dict != null) {

dict = (IDictionary<string, object>)cloneable.Clone();

} else

#endif

{

dict = new Dictionary<string, object>(_dict, StringComparer.Ordinal);

}

Dictionary<object, object> objDict = null;

if (_objDict != null) {

objDict = new Dictionary<object, object>(_objDict, DefaultContext.DefaultPythonContext.EqualityComparer);

}

return new StringDictionaryStorage(dict, objDict);

}

}

private void EnsureObjectDictionary() {

if (_objDict == null) {

Interlocked.CompareExchange<Dictionary<object, object>>(ref _objDict, new Dictionary<object, object>(DefaultContext.DefaultPythonContext.EqualityComparer), null);

}

}

}

}