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//
// System.Web.Services.Protocols.PatternMatcher.cs
//
// Author:
// Tim Coleman (tim@timcoleman.com)
//
// Copyright (C) Tim Coleman, 2002
//
//
// 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.Web.Services;
using System.Reflection;
using System.Text.RegularExpressions;
using System.Collections;
namespace System.Web.Services.Protocols
{
public sealed class PatternMatcher
{
Type _returnType;
MatchInfo[] _matchInfos;
public PatternMatcher (Type type)
{
_returnType = type;
FieldInfo[] fields = type.GetFields ();
ArrayList matchInfos = new ArrayList ();
foreach (FieldInfo field in fields)
{
object[] ats = field.GetCustomAttributes (typeof(MatchAttribute), true);
if (ats.Length == 0) continue;
MatchInfo mi = new MatchInfo ();
mi.Field = field;
mi.Match = (MatchAttribute) ats[0];
RegexOptions opts = RegexOptions.Multiline;
if (mi.Match.IgnoreCase) opts |= RegexOptions.IgnoreCase;
mi.Regex = new Regex (mi.Match.Pattern, opts);
matchInfos.Add (mi);
}
_matchInfos = (MatchInfo[]) matchInfos.ToArray (typeof(MatchInfo));
}
public object Match (string text)
{
object ob = Activator.CreateInstance (_returnType);
foreach (MatchInfo mi in _matchInfos)
{
MatchCollection matches = mi.Regex.Matches (text);
object res = null;
if (mi.Field.FieldType.IsArray)
{
int max = mi.Match.MaxRepeats;
if (max == -1) max = matches.Count;
Type elemType = mi.Field.FieldType.GetElementType();
Array array = Array.CreateInstance (elemType, max);
for (int n=0; n<max; n++)
array.SetValue (mi.GetMatchValue (matches[n], elemType), n);
res = array;
}
else if (matches.Count > 0)
res = mi.GetMatchValue (matches[0], mi.Field.FieldType);
mi.Field.SetValue (ob, res);
}
return ob;
}
}
class MatchInfo
{
public FieldInfo Field;
public MatchAttribute Match;
public Regex Regex;
const string GroupError = "{0} is not a valid group index for match '{1}'. The highest valid group index for this match is {2}";
const string CaptureError = "{0} is not a valid capture index for match '{1}'. The highest valid capture index for this match is {2}";
public object GetMatchValue (Match match, Type castType)
{
if (Match.Group >= match.Groups.Count)
throw new Exception (string.Format (GroupError, Match.Group, Field.Name, match.Groups.Count-1));
Group group = match.Groups [Match.Group];
if (Match.Capture >= group.Captures.Count)
throw new Exception (string.Format (CaptureError, Match.Capture, Field.Name, group.Captures.Count-1));
string val = group.Captures [Match.Capture].Value;
return Convert.ChangeType (val, castType);
}
}
}
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