2 // System.Web.Services.Protocols.PatternMatcher.cs
5 // Tim Coleman (tim@timcoleman.com)
7 // Copyright (C) Tim Coleman, 2002
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System.Web.Services;
32 using System.Reflection;
33 using System.Text.RegularExpressions;
34 using System.Collections;
36 namespace System.Web.Services.Protocols
38 public sealed class PatternMatcher
41 MatchInfo[] _matchInfos;
43 public PatternMatcher (Type type)
47 FieldInfo[] fields = type.GetFields ();
48 ArrayList matchInfos = new ArrayList ();
50 foreach (FieldInfo field in fields)
52 object[] ats = field.GetCustomAttributes (typeof(MatchAttribute), true);
53 if (ats.Length == 0) continue;
55 MatchInfo mi = new MatchInfo ();
57 mi.Match = (MatchAttribute) ats[0];
59 RegexOptions opts = RegexOptions.Multiline;
60 if (mi.Match.IgnoreCase) opts |= RegexOptions.IgnoreCase;
61 mi.Regex = new Regex (mi.Match.Pattern, opts);
65 _matchInfos = (MatchInfo[]) matchInfos.ToArray (typeof(MatchInfo));
68 public object Match (string text)
70 object ob = Activator.CreateInstance (_returnType);
72 foreach (MatchInfo mi in _matchInfos)
74 MatchCollection matches = mi.Regex.Matches (text);
78 if (mi.Field.FieldType.IsArray)
80 int max = mi.Match.MaxRepeats;
81 if (max == -1) max = matches.Count;
83 Type elemType = mi.Field.FieldType.GetElementType();
84 Array array = Array.CreateInstance (elemType, max);
85 for (int n=0; n<max; n++)
86 array.SetValue (mi.GetMatchValue (matches[n], elemType), n);
89 else if (matches.Count > 0)
90 res = mi.GetMatchValue (matches[0], mi.Field.FieldType);
92 mi.Field.SetValue (ob, res);
101 public FieldInfo Field;
102 public MatchAttribute Match;
105 const string GroupError = "{0} is not a valid group index for match '{1}'. The highest valid group index for this match is {2}";
106 const string CaptureError = "{0} is not a valid capture index for match '{1}'. The highest valid capture index for this match is {2}";
108 public object GetMatchValue (Match match, Type castType)
110 if (Match.Group >= match.Groups.Count)
111 throw new Exception (string.Format (GroupError, Match.Group, Field.Name, match.Groups.Count-1));
113 Group group = match.Groups [Match.Group];
114 if (Match.Capture >= group.Captures.Count)
115 throw new Exception (string.Format (CaptureError, Match.Capture, Field.Name, group.Captures.Count-1));
117 string val = group.Captures [Match.Capture].Value;
118 return Convert.ChangeType (val, castType);