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//
// xmldocdiff.cs
//
// Author:
// Marek Safar (marek.safar@gmail.com)
//
// Copyright (C) 2012 Xamarin Inc (http://www.xamarin.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_1
using System;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Linq;
public class XmlComparer
{
public class ComparisonException : Exception
{
public ComparisonException (string message)
: base (message)
{
}
}
static readonly bool debug = false;
readonly string start;
public XmlComparer (string startNode)
{
this.start = "/" + startNode;
}
public void Compare (string reference, string output)
{
XmlDocument doc1 = new XmlDocument ();
doc1.Load (reference);
XmlDocument doc2 = new XmlDocument ();
doc2.Load (output);
var memberList1 = doc1.SelectSingleNode (start);
var memberList2 = doc2.SelectSingleNode (start);
CompareNodes (memberList1, memberList2);
}
static bool CompareNodes (XmlNode reference, XmlNode output)
{
List<Tuple<string, XmlNode>> ref_nodes = new List<Tuple<string, XmlNode>> ();
foreach (XmlNode node in reference.ChildNodes) {
if (node.NodeType == XmlNodeType.Comment)
continue;
ref_nodes.Add (Tuple.Create (node.Name, node));
}
foreach (XmlNode node in output.ChildNodes) {
if (node.NodeType == XmlNodeType.Comment)
continue;
Tuple<string, XmlNode> found = null;
foreach (var entry in ref_nodes.Where (l => l.Item1 == node.Name)) {
if (node.Attributes == null) {
if (node.Attributes != entry.Item2.Attributes)
continue;
} else {
List<XmlAttribute> attrs = node.Attributes.Cast<XmlAttribute> ().ToList ();
XmlAttribute missing = null;
foreach (XmlAttribute attr in entry.Item2.Attributes) {
var match = attrs.Find (l => l.Name == attr.Name);
if (match == null) {
missing = attr;
break;
}
if (match.Value == attr.Value)
attrs.Remove (match);
}
if (missing != null || attrs.Count > 0) {
continue;
}
}
if (node.HasChildNodes != entry.Item2.HasChildNodes)
continue;
if (!node.HasChildNodes || CompareNodes (node, entry.Item2)) {
found = entry;
break;
}
}
if (found == null) {
Report ("Expected node: " + node.OuterXml);
return false;
}
ref_nodes.Remove (found);
}
if (ref_nodes.Count > 0) {
Report ("Unexpected node: " + ref_nodes[0].Item2.OuterXml);
return false;
}
return true;
}
static void Report (string format, params object[] args)
{
if (debug)
Console.WriteLine (format, args);
else
throw new ComparisonException (String.Format (format, args));
}
}
#endif
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