mcs/class/corlib/System/AggregateException.cs

   1 // AggregateException.cs
   2 //
   3 // Copyright (c) 2008 Jérémie "Garuma" Laval
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining a copy
   6 // of this software and associated documentation files (the "Software"), to deal
   7 // in the Software without restriction, including without limitation the rights
   8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9 // copies of the Software, and to permit persons to whom the Software is
  10 // furnished to do so, subject to the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be included in
  13 // all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21 // THE SOFTWARE.
  22 //
  23 //
  24
  25 #if NET_4_0 || MOBILE
  26 using System;
  27 using System.Collections.ObjectModel;
  28 using System.Collections.Generic;
  29 using System.Runtime.Serialization;
  30
  31 namespace System
  32 {
  33
  34         [System.SerializableAttribute]
  35         [System.Diagnostics.DebuggerDisplay ("Count = {InnerExceptions.Count}")]
  36         public class AggregateException : Exception
  37         {
  38                 List<Exception> innerExceptions = new List<Exception> ();
  39                 const string defaultMessage = "One or more errors occured";
  40
  41                 public AggregateException () : base (defaultMessage)
  42                 {
  43                 }
  44
  45                 public AggregateException (string message): base (message)
  46                 {
  47                 }
  48
  49                 public AggregateException (string message, Exception innerException): base (message, innerException)
  50                 {
  51                         if (innerException == null)
  52                                 throw new ArgumentNullException ("innerException");
  53                         innerExceptions.Add (innerException);
  54                 }
  55
  56                 protected AggregateException (SerializationInfo info, StreamingContext context)
  57                         : base (info, context)
  58                 {
  59                 }
  60
  61                 public AggregateException (params Exception[] innerExceptions)
  62                         : this (string.Empty, innerExceptions)
  63                 {
  64                 }
  65
  66                 public AggregateException (string message, params Exception[] innerExceptions)
  67                         : base (message, innerExceptions == null || innerExceptions.Length == 0 ? null : innerExceptions[0])
  68                 {
  69                         if (innerExceptions == null)
  70                                 throw new ArgumentNullException ("innerExceptions");
  71                         foreach (var exception in innerExceptions)
  72                                 if (exception == null)
  73                                         throw new ArgumentException ("One of the inner exception is null", "innerExceptions");
  74
  75                         this.innerExceptions.AddRange (innerExceptions);
  76                 }
  77
  78                 public AggregateException (IEnumerable<Exception> innerExceptions)
  79                         : this (defaultMessage, innerExceptions)
  80                 {
  81                 }
  82
  83                 public AggregateException (string message, IEnumerable<Exception> innerExceptions)
  84                         : this (message, new List<Exception> (innerExceptions).ToArray ())
  85                 {
  86                 }
  87
  88                 public AggregateException Flatten ()
  89                 {
  90                         List<Exception> inner = new List<Exception> ();
  91
  92                         foreach (Exception e in innerExceptions) {
  93                                 AggregateException aggEx = e as AggregateException;
  94                                 if (aggEx != null) {
  95                                         inner.AddRange (aggEx.Flatten ().InnerExceptions);
  96                                 } else {
  97                                         inner.Add (e);
  98                                 }
  99                         }
 100
 101                         return new AggregateException (inner);
 102                 }
 103
 104                 public void Handle (Func<Exception, bool> predicate)
 105                 {
 106                         List<Exception> failed = new List<Exception> ();
 107                         foreach (var e in innerExceptions) {
 108                                 try {
 109                                         if (!predicate (e))
 110                                                 failed.Add (e);
 111                                 } catch {
 112                                         throw new AggregateException (failed);
 113                                 }
 114                         }
 115                         if (failed.Count > 0)
 116                                 throw new AggregateException (failed);
 117                 }
 118
 119                 public ReadOnlyCollection<Exception> InnerExceptions {
 120                         get {
 121                                 return innerExceptions.AsReadOnly ();
 122                         }
 123                 }
 124
 125                 internal void AddChildException (AggregateException childEx)
 126                 {
 127                         if (innerExceptions == null)
 128                                 innerExceptions = new List<Exception> ();
 129                         if (childEx == null)
 130                                 return;
 131
 132                         innerExceptions.Add (childEx);
 133                 }
 134
 135                 public override string ToString ()
 136                 {
 137                         System.Text.StringBuilder finalMessage = new System.Text.StringBuilder (base.ToString ());
 138
 139                         int currentIndex = -1;
 140                         foreach (Exception e in innerExceptions) {
 141                                 finalMessage.Append (Environment.NewLine);
 142                                 finalMessage.Append (" --> (Inner exception ");
 143                                 finalMessage.Append (++currentIndex);
 144                                 finalMessage.Append (") ");
 145                                 finalMessage.Append (e.ToString ());
 146                                 finalMessage.Append (Environment.NewLine);
 147                         }
 148                         return finalMessage.ToString ();
 149                 }
 150
 151                 public override void GetObjectData (SerializationInfo info,     StreamingContext context)
 152                 {
 153                         if (info == null) {
 154                                 throw new ArgumentNullException("info");
 155                         }
 156                         base.GetObjectData(info, context);
 157                         info.AddValue ("InnerExceptions", innerExceptions.ToArray(), typeof (Exception[]));
 158                 }
 159
 160                 public override Exception GetBaseException ()
 161                 {
 162                         if (innerExceptions == null || innerExceptions.Count == 0)
 163                                 return this;
 164                         return innerExceptions[0].GetBaseException ();
 165                 }
 166         }
 167 }
 168 #endif