//
// Authors:
// Atsushi Enomoto
//
// Copyright 2007 Novell (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.
//
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml;
namespace System.Xml.Linq{
public sealed class XNamespace
{
static readonly XNamespace blank, xml, xmlns;
static Dictionary<string, XNamespace> nstable;
static XNamespace ()
{
nstable = new Dictionary<string, XNamespace> ();
blank = Get (String.Empty);
xml = Get ("http://www.w3.org/XML/1998/namespace");
xmlns = Get ("http://www.w3.org/2000/xmlns/");
}
public static XNamespace None {
get { return blank; }
}
public static XNamespace Xml {
get { return xml; }
}
public static XNamespace Xmlns {
get { return xmlns; }
}
public static XNamespace Get (string uri)
{
lock (nstable) {
XNamespace ret;
if (!nstable.TryGetValue (uri, out ret)) {
ret = new XNamespace (uri);
nstable [uri] = ret;
}
return ret;
}
}
public XName GetName (string localName)
{
if (table == null)
table = new Dictionary<string, XName> ();
lock (table) {
XName ret;
if (!table.TryGetValue (localName, out ret)) {
ret = new XName (localName, this);
table [localName] = ret;
}
return ret;
}
}
string uri;
Dictionary<string, XName> table;
XNamespace (string namespaceName)
{
if (namespaceName == null)
throw new ArgumentNullException ("namespaceName");
uri = namespaceName;
}
public string NamespaceName {
get { return uri; }
}
public override bool Equals (object other)
{
if (Object.ReferenceEquals (this, other))
return true;
XNamespace ns = other as XNamespace;
return ns != null && uri == ns.uri;
}
public static bool operator == (XNamespace o1, XNamespace o2)
{
return (object) o1 != null ? o1.Equals (o2) : (object) o2 == null;
}
public static bool operator != (XNamespace o1, XNamespace o2)
{
return ! (o1 == o2);
}
public static XName operator +(XNamespace ns, string localName)
{
return new XName (localName, ns.NamespaceName);
}
[CLSCompliant (false)]
public static implicit operator XNamespace (string s)
{
return s != null ? XNamespace.Get (s) : null;
}
public override int GetHashCode ()
{
return uri.GetHashCode ();
}
public override string ToString ()
{
return uri;
}
}
}
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