mcs/class/System.Web.Services/System.Web.Services.Protocols/ValueCollectionParameterReader.cs

   1 //
   2 // System.Web.Services.Protocols.ValueCollectionParameterReader.cs
   3 //
   4 // Author:
   5 //   Tim Coleman (tim@timcoleman.com)
   6 //   Lluis Sanchez Gual (lluis@ximian.com)
   7 //
   8 // Copyright (C) Tim Coleman, 2002
   9 //
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Collections.Specialized;
  33 using System.Reflection;
  34 using System.Web;
  35 using System.Xml;
  36
  37 namespace System.Web.Services.Protocols {
  38         public abstract class ValueCollectionParameterReader : MimeParameterReader {
  39
  40                 ParameterInfo[] parameters;
  41
  42                 #region Constructors
  43
  44                 protected ValueCollectionParameterReader ()
  45                 {
  46                 }
  47
  48                 #endregion // Constructors
  49
  50                 #region Methods
  51
  52                 public override object GetInitializer (LogicalMethodInfo methodInfo)
  53                 {
  54                         if (IsSupported (methodInfo)) return methodInfo.Parameters;
  55                         else return null;
  56                 }
  57
  58                 public override void Initialize (object o)
  59                 {
  60                         parameters = (ParameterInfo[]) o;
  61                 }
  62
  63                 public static bool IsSupported (LogicalMethodInfo methodInfo)
  64                 {
  65                         foreach (ParameterInfo param in methodInfo.Parameters)
  66                                 if (!IsSupported (param)) return false;
  67                         return true;
  68                 }
  69
  70                 public static bool IsSupported (ParameterInfo paramInfo)
  71                 {
  72                         Type type = paramInfo.ParameterType;
  73                         if (type.IsByRef || paramInfo.IsOut) return false;
  74                         if (type.IsArray) return IsSupportedPrimitive (type.GetElementType());
  75                         else return IsSupportedPrimitive (type);
  76                 }
  77
  78                 internal static bool IsSupportedPrimitive (Type type)
  79                 {
  80                         return ( type.IsPrimitive ||
  81                                          type.IsEnum ||
  82                                          type == typeof(string) ||
  83                                          type == typeof(DateTime) ||
  84                                          type == typeof(Decimal)
  85                                          );
  86                 }
  87
  88                 protected object[] Read (NameValueCollection collection)
  89                 {
  90                         object[] res = new object [parameters.Length];
  91                         for (int n=0; n<res.Length; n++)
  92                         {
  93                                 ParameterInfo pi = parameters [n];
  94
  95                                 if (pi.ParameterType.IsArray) {
  96                                         string[] values = collection.GetValues (pi.Name);
  97                                         if (values == null)
  98                                                 throw new InvalidOperationException ("Missing parameter: " + pi.Name);
  99                                         Type elemType = pi.ParameterType.GetElementType ();
 100                                         Array a = Array.CreateInstance (elemType, values.Length);
 101                                         for (int i = 0; i < values.Length; i++) {
 102                                                 try {
 103                                                         a.SetValue (StringToObj (elemType, values [i]), i);
 104                                                 } catch (Exception ex) {
 105                                                         string error = "Cannot convert '" + values [i] + "' to " + elemType + "\n";
 106                                                         error += "Parameter name: " + pi.Name + " --> " + ex.Message;
 107                                                         throw new InvalidOperationException (error);
 108                                                 }
 109                                         }
 110                                         res [n] = a;
 111                                 } else {
 112                                         string val = collection [pi.Name];
 113                                         if (val == null)
 114                                                 throw new InvalidOperationException ("Missing parameter: " + pi.Name);
 115                                         try
 116                                         {
 117                                                 res [n] = StringToObj (pi.ParameterType, val);
 118                                         }
 119                                         catch (Exception ex)
 120                                         {
 121                                                 string error = "Cannot convert '" + val + "' to " + pi.ParameterType + "\n";
 122                                                 error += "Parameter name: " + pi.Name + " --> " + ex.Message;
 123                                                 throw new InvalidOperationException (error);
 124                                         }
 125                                 }
 126                         }
 127                         return res;
 128                 }
 129                 #endregion // Methods
 130         }
 131 }