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//
// XmlDictionary.cs
//
// Author:
// Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2005 Novell, Inc. http://www.novell.com
//
// 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.
//
#if NET_2_0
using System;
using System.Collections;
using System.Collections.Generic;
namespace System.Xml
{
public class XmlDictionary : IXmlDictionary
{
internal class EmptyDictionary : XmlDictionary
{
public static readonly EmptyDictionary Instance =
new EmptyDictionary ();
public EmptyDictionary ()
: base (1)
{
}
}
static XmlDictionary empty = new XmlDictionary (true);
public static IXmlDictionary Empty {
get { return empty; }
}
readonly bool is_readonly;
Dictionary<string, XmlDictionaryString> dict;
List<XmlDictionaryString> list;
public XmlDictionary ()
{
dict = new Dictionary<string, XmlDictionaryString> ();
list = new List<XmlDictionaryString> ();
}
public XmlDictionary (int capacity)
{
dict = new Dictionary<string, XmlDictionaryString> (capacity);
list = new List<XmlDictionaryString> (capacity);
}
// for static empty.
private XmlDictionary (bool isReadOnly)
: this (1)
{
is_readonly = isReadOnly;
}
public virtual XmlDictionaryString Add (string value)
{
if (is_readonly)
throw new InvalidOperationException ();
XmlDictionaryString ret;
if (dict.TryGetValue (value, out ret))
return ret;
ret = new XmlDictionaryString (this, value, dict.Count);
dict.Add (value, ret);
list.Add (ret);
return ret;
}
public virtual bool TryLookup (
int key, out XmlDictionaryString result)
{
if (key < 0 || dict.Count <= key) {
result = null;
return false;
}
result = list [key];
return true;
}
public virtual bool TryLookup (string value,
out XmlDictionaryString result)
{
if (value == null)
throw new ArgumentNullException ();
return dict.TryGetValue (value, out result);
}
public virtual bool TryLookup (XmlDictionaryString value,
out XmlDictionaryString result)
{
if (value == null)
throw new ArgumentNullException ();
if (value.Dictionary != this) {
result = null;
return false;
}
for (int i = 0; i < list.Count; i++) {
if (object.ReferenceEquals (list [i], value)) {
result = value;
return true;
}
}
result = null;
return false;
}
}
}
#endif
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