-//\r
-// System.Collections.Specialized.HybridDictionary.cs\r
-//\r
-// Author:\r
+//
+// System.Collections.Specialized.HybridDictionary.cs
+//
+// Author:
// Lawrence Pit (loz@cable.a2000.nl)
+// Raja R Harinath <rharinath@novell.com>
+//
+// Copyright (C) 2004, 2005 Novell (http://www.novell.com)
+//
+
//
-// Copyright (C) 2004 Novell (http://www.novell.com)\r
-//\r
-\r
-using System;\r
-using System.Collections;\r
-\r
-namespace System.Collections.Specialized {\r
- \r
- [Serializable]\r
- public class HybridDictionary : IDictionary, ICollection, IEnumerable {\r
- \r
- private const int switchAfter = 10;\r
-\r
- private ListDictionary list;\r
- private Hashtable hashtable;\r
- private bool caseInsensitive = false;\r
-\r
- // Constructors\r
- \r
- public HybridDictionary() : this (0, false) { }\r
- \r
- public HybridDictionary (bool caseInsensitive) : this (0, caseInsensitive) { }\r
- \r
- public HybridDictionary (int initialSize) : this (initialSize, false) { }\r
- \r
- public HybridDictionary(int initialSize, bool caseInsensitive) \r
- {\r
- this.caseInsensitive = caseInsensitive;\r
- \r
- if (initialSize <= switchAfter)\r
- if (caseInsensitive)\r
- list = new ListDictionary (CaseInsensitiveComparer.Default);\r
- else\r
- list = new ListDictionary ();\r
- else\r
- if (caseInsensitive) \r
- hashtable = new Hashtable (initialSize, \r
- CaseInsensitiveHashCodeProvider.Default, \r
- CaseInsensitiveComparer.Default);\r
- else\r
- hashtable = new Hashtable (initialSize);\r
- } \r
-\r
- \r
- // Properties\r
- \r
- public int Count {\r
- get {\r
- if (list != null)\r
- return list.Count;\r
- return hashtable.Count;\r
- }\r
- }\r
- \r
- public bool IsFixedSize {\r
- get { return false; }\r
- }\r
- \r
- public bool IsReadOnly {\r
- get { return false; }\r
- }\r
- \r
- public bool IsSynchronized {\r
- get { return false; }\r
- }\r
- \r
- public object this [object key] {\r
- get { \r
- if (key == null)\r
- throw new ArgumentNullException("key");\r
- if (list != null)\r
- return list [key];\r
- return hashtable [key];\r
- }\r
- set { \r
- if (list != null)\r
- if (list.Count >= switchAfter) \r
- Switch ();\r
- else {\r
- list [key] = value;\r
- return;\r
- }\r
- hashtable [key] = value;\r
- }\r
- }\r
- \r
- public ICollection Keys {\r
- get {\r
- if (list != null)\r
- return list.Keys;\r
- return hashtable.Keys;\r
- }\r
- }\r
- \r
- public object SyncRoot {\r
- get { return this; }\r
- }\r
- \r
- public ICollection Values {\r
- get { \r
- if (list != null)\r
- return list.Values;\r
- return hashtable.Values;\r
- }\r
- }\r
- \r
- \r
- // Methods\r
- \r
- public void Add (object key, object value) \r
- {\r
- if (list != null)\r
- if (list.Count >= switchAfter) \r
- Switch ();\r
- else {\r
- list.Add (key, value);\r
- return;\r
- }\r
- hashtable.Add (key, value);\r
- }\r
- \r
- public void Clear ()\r
- {\r
- if (caseInsensitive)\r
- list = new ListDictionary (CaseInsensitiveComparer.Default);\r
- else\r
- list = new ListDictionary ();\r
- hashtable = null;\r
- }\r
- \r
- public bool Contains (object key)\r
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+namespace System.Collections.Specialized {
+
+ [Serializable]
+ public class HybridDictionary : IDictionary, ICollection, IEnumerable {
+
+ private const int switchAfter = 10;
+
+ private IDictionary inner {
+ get { return list == null ? (IDictionary) hashtable : (IDictionary) list; }
+ }
+
+ private bool caseInsensitive;
+ private Hashtable hashtable;
+ private ListDictionary list;
+
+ // Constructors
+
+ public HybridDictionary() : this (0, false) { }
+
+ public HybridDictionary (bool caseInsensitive) : this (0, caseInsensitive) { }
+
+ public HybridDictionary (int initialSize) : this (initialSize, false) { }
+
+ public HybridDictionary (int initialSize, bool caseInsensitive)
{
- if (key == null) {
- if (this.Count == 0)
- return false;
- else
- throw new ArgumentNullException ("key");\r
+ this.caseInsensitive = caseInsensitive;
+
+ IComparer comparer = caseInsensitive ? CaseInsensitiveComparer.DefaultInvariant : null;
+ IHashCodeProvider hcp = caseInsensitive ? CaseInsensitiveHashCodeProvider.DefaultInvariant : null;
+
+ if (initialSize <= switchAfter)
+ list = new ListDictionary (comparer);
+ else
+ hashtable = new Hashtable (initialSize, hcp, comparer);
+ }
+
+ // Properties
+
+ public int Count {
+ get { return inner.Count; }
+ }
+
+ public bool IsFixedSize {
+ get { return false; }
+ }
+
+ public bool IsReadOnly {
+ get { return false; }
+ }
+
+ public bool IsSynchronized {
+ get { return false; }
+ }
+
+ public object this [object key] {
+ get { return inner [key]; }
+
+ set {
+ inner [key] = value;
+ if (list != null && Count > switchAfter)
+ Switch ();
}
- if (list != null)\r
- return list.Contains (key);\r
- return hashtable.Contains (key);\r
- }\r
- \r
- public void CopyTo (Array array, int index)\r
- {\r
- if (list != null) \r
- list.CopyTo (array, index);\r
- else\r
- hashtable.CopyTo (array, index);\r
- }\r
- \r
- public IDictionaryEnumerator GetEnumerator ()\r
- {\r
- if (list != null)\r
- return list.GetEnumerator ();\r
- return hashtable.GetEnumerator ();\r
- }\r
-\r
- IEnumerator IEnumerable.GetEnumerator ()\r
- {\r
- return GetEnumerator ();\r
- }\r
-\r
- public void Remove (object key)\r
- {\r
- if (list != null)\r
- list.Remove (key);\r
- else \r
- hashtable.Remove (key);\r
- }\r
- \r
- private void Switch ()\r
- {\r
- if (caseInsensitive) \r
- hashtable = new Hashtable (switchAfter + 1,\r
- CaseInsensitiveHashCodeProvider.Default, \r
- CaseInsensitiveComparer.Default);\r
- else\r
- hashtable = new Hashtable (switchAfter + 1);\r
- IDictionaryEnumerator e = list.GetEnumerator ();\r
- while (e.MoveNext ())\r
- hashtable.Add (e.Key, e.Value);\r
- list = null;\r
- }\r
- }\r
-}\r
+ }
+
+ public ICollection Keys {
+ get { return inner.Keys; }
+ }
+
+ public object SyncRoot {
+ get { return this; }
+ }
+
+ public ICollection Values {
+ get { return inner.Values; }
+ }
+
+
+ // Methods
+
+ public void Add (object key, object value)
+ {
+ inner.Add (key, value);
+ if (list != null && Count > switchAfter)
+ Switch ();
+ }
+
+ public void Clear ()
+ {
+ // According to MSDN, this doesn't switch a Hashtable back to a ListDictionary
+ inner.Clear ();
+ }
+
+ public bool Contains (object key)
+ {
+#if NET_2_0
+ return inner.Contains (key);
+#else
+ // if the dictionary is empty, 'Contains (null)' doesn't throw an ArgumentNullException
+ return Count != 0 && inner.Contains (key);
+#endif
+ }
+
+ public void CopyTo (Array array, int index)
+ {
+ inner.CopyTo (array, index);
+ }
+
+ public IDictionaryEnumerator GetEnumerator ()
+ {
+ return inner.GetEnumerator ();
+ }
+
+ IEnumerator IEnumerable.GetEnumerator ()
+ {
+ return GetEnumerator ();
+ }
+
+ public void Remove (object key)
+ {
+ // According to MSDN, this does not switch a Hashtable back to a ListDictionary
+ // even if Count falls below switchAfter
+ inner.Remove (key);
+ }
+
+ private void Switch ()
+ {
+ IComparer comparer = caseInsensitive ? CaseInsensitiveComparer.DefaultInvariant : null;
+ IHashCodeProvider hcp = caseInsensitive ? CaseInsensitiveHashCodeProvider.DefaultInvariant : null;
+
+ hashtable = new Hashtable (list, hcp, comparer);
+ list.Clear ();
+ list = null;
+ }
+ }
+}
projects / mono.git / blobdiff