Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/diagnostics/SwitchAttribute.cs

@@ -0,0 +1,90 @@
+//------------------------------------------------------------------------------
+// <copyright file="SwitchAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+using System.Collections;
+
+namespace System.Diagnostics {
+
+    [AttributeUsage(AttributeTargets.Assembly | AttributeTargets.Class | AttributeTargets.Constructor |
+                    AttributeTargets.Event | AttributeTargets.Method | AttributeTargets.Property)]
+    public sealed class SwitchAttribute : Attribute {
+        private Type type;
+        private string name;
+        private string description;
+
+    	public SwitchAttribute (string switchName, Type switchType) {
+    	    SwitchName = switchName;
+    	    SwitchType = switchType;
+        }
+
+    	public string SwitchName {
+    	    get { return name; }
+    	    set {
+    	        if (value == null)
+                    throw new ArgumentNullException("value");
+                if (value.Length == 0)
+    	            throw new ArgumentException(SR.GetString(SR.InvalidNullEmptyArgument, "value"), "value");
+
+    	        name = value;
+	        }
+        }
+
+    	public Type SwitchType {
+    	    get { return type; }
+    	    set {
+    	        if (value == null)
+    	            throw new ArgumentNullException("value");
+    	        type = value;
+	        }
+        }
+
+    	public string SwitchDescription {
+    	    get { return description; }
+    	    set { description = value;}
+        }
+
+    	public static SwitchAttribute[] GetAll(Assembly assembly) {
+    	    if (assembly == null)
+    	        throw new ArgumentNullException("assembly");
+
+    	    ArrayList  switchAttribs = new ArrayList ();
+
+    	    object[] attribs = assembly.GetCustomAttributes(typeof(SwitchAttribute), false);
+    	    switchAttribs.AddRange(attribs);
+
+    	    Type[] types = assembly.GetTypes();
+    	    for (int i=0; i<types.Length; i++)
+    	        GetAllRecursive(types[i], switchAttribs);
+
+            SwitchAttribute[] ret = new SwitchAttribute[switchAttribs.Count];
+            switchAttribs.CopyTo(ret, 0);
+    	    return ret;
+        }
+
+    	static void GetAllRecursive(Type type, ArrayList   switchAttribs) {
+            GetAllRecursive((MemberInfo) type, switchAttribs);
+    	    MemberInfo[] members = type.GetMembers(BindingFlags.Public | BindingFlags.NonPublic |
+    	                                           BindingFlags.DeclaredOnly | BindingFlags.Instance |
+    	                                           BindingFlags.Static);
+    	    for (int i=0; i<members.Length; i++) {
+                // ignore Types here.  They will get covered by the top level assembly.GetTypes
+                if (!(members[i] is Type))
+                    GetAllRecursive(members[i], switchAttribs);
+    	    }
+
+    	}
+
+    	static void GetAllRecursive(MemberInfo member, ArrayList switchAttribs) {
+    	    object[] attribs = member.GetCustomAttributes(typeof(SwitchAttribute), false);
+    	    switchAttribs.AddRange(attribs);
+    	}
+
+
+    }
+}
+