123 lines
3.7 KiB
C#
123 lines
3.7 KiB
C#
//
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// System.Web.Services.Protocols.PatternMatcher.cs
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//
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// Author:
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// Tim Coleman (tim@timcoleman.com)
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//
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// Copyright (C) Tim Coleman, 2002
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Web.Services;
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using System.Reflection;
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using System.Text.RegularExpressions;
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using System.Collections;
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namespace System.Web.Services.Protocols
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{
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public sealed class PatternMatcher
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{
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Type _returnType;
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MatchInfo[] _matchInfos;
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public PatternMatcher (Type type)
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{
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_returnType = type;
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FieldInfo[] fields = type.GetFields ();
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ArrayList matchInfos = new ArrayList ();
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foreach (FieldInfo field in fields)
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{
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object[] ats = field.GetCustomAttributes (typeof(MatchAttribute), true);
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if (ats.Length == 0) continue;
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MatchInfo mi = new MatchInfo ();
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mi.Field = field;
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mi.Match = (MatchAttribute) ats[0];
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RegexOptions opts = RegexOptions.Multiline;
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if (mi.Match.IgnoreCase) opts |= RegexOptions.IgnoreCase;
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mi.Regex = new Regex (mi.Match.Pattern, opts);
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matchInfos.Add (mi);
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}
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_matchInfos = (MatchInfo[]) matchInfos.ToArray (typeof(MatchInfo));
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}
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public object Match (string text)
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{
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object ob = Activator.CreateInstance (_returnType);
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foreach (MatchInfo mi in _matchInfos)
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{
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MatchCollection matches = mi.Regex.Matches (text);
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object res = null;
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if (mi.Field.FieldType.IsArray)
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{
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int max = mi.Match.MaxRepeats;
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if (max == -1) max = matches.Count;
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Type elemType = mi.Field.FieldType.GetElementType();
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Array array = Array.CreateInstance (elemType, max);
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for (int n=0; n<max; n++)
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array.SetValue (mi.GetMatchValue (matches[n], elemType), n);
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res = array;
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}
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else if (matches.Count > 0)
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res = mi.GetMatchValue (matches[0], mi.Field.FieldType);
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mi.Field.SetValue (ob, res);
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}
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return ob;
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}
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}
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class MatchInfo
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{
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public FieldInfo Field;
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public MatchAttribute Match;
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public Regex Regex;
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const string GroupError = "{0} is not a valid group index for match '{1}'. The highest valid group index for this match is {2}";
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const string CaptureError = "{0} is not a valid capture index for match '{1}'. The highest valid capture index for this match is {2}";
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public object GetMatchValue (Match match, Type castType)
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{
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if (Match.Group >= match.Groups.Count)
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throw new Exception (string.Format (GroupError, Match.Group, Field.Name, match.Groups.Count-1));
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Group group = match.Groups [Match.Group];
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if (Match.Capture >= group.Captures.Count)
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throw new Exception (string.Format (CaptureError, Match.Capture, Field.Name, group.Captures.Count-1));
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string val = group.Captures [Match.Capture].Value;
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return Convert.ChangeType (val, castType);
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}
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}
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}
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