Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/componentmodel/LicenseProviderAttribute.cs

@@ -0,0 +1,120 @@
+//------------------------------------------------------------------------------
+// <copyright file="LicenseProviderAttribute.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.ComponentModel {
+
+    using System;
+    using System.Security.Permissions;
+
+    /// <devdoc>
+    /// <para>Specifies the <see cref='System.ComponentModel.LicenseProvider'/>
+    /// to use with a class.</para>
+    /// </devdoc>
+    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = false)]
+    public sealed class LicenseProviderAttribute : Attribute {
+
+        /// <devdoc>
+        ///    <para>
+        ///       Specifies the default value, which is no provider. This <see langword='static '/>field is read-only.
+        ///    </para>
+        /// </devdoc>
+        public static readonly LicenseProviderAttribute Default = new LicenseProviderAttribute();
+
+        private Type licenseProviderType = null;
+        private string licenseProviderName = null;
+
+        /// <devdoc>
+        /// <para>Initializes a new instance of the <see cref='System.ComponentModel.LicenseProviderAttribute'/> class without a license
+        ///    provider.</para>
+        /// </devdoc>
+        public LicenseProviderAttribute() : this((string)null) {
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of the <see cref='System.ComponentModel.LicenseProviderAttribute'/> class with
+        ///       the specified type.
+        ///    </para>
+        /// </devdoc>
+        public LicenseProviderAttribute(string typeName) {
+            licenseProviderName = typeName;
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of the <see cref='System.ComponentModel.LicenseProviderAttribute'/> class with
+        ///       the specified type of license provider.
+        ///    </para>
+        /// </devdoc>
+        public LicenseProviderAttribute(Type type) {
+            licenseProviderType = type;
+        }
+
+        /// <devdoc>
+        ///    <para>Gets the license provider to use with the associated class.</para>
+        /// </devdoc>
+        public Type LicenseProvider {
+            // SECREVIEW: Remove this attribute once bug#411910 is fixed.
+            [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2113:SecureLateBindingMethods")]
+            get {
+                if (licenseProviderType == null && licenseProviderName != null) {
+                    licenseProviderType = Type.GetType(licenseProviderName);
+                }
+                return licenseProviderType;
+            }
+        }
+
+        /// <internalonly/>
+        /// <devdoc>
+        ///    <para>
+        ///       This defines a unique ID for this attribute type. It is used
+        ///       by filtering algorithms to identify two attributes that are
+        ///       the same type. For most attributes, this just returns the
+        ///       Type instance for the attribute. LicenseProviderAttribute overrides this to include the type name and the
+        ///       provider type name.
+        ///    </para>
+        /// </devdoc>
+        public override object TypeId {
+            get {
+                string typeName = licenseProviderName;
+
+                if (typeName == null && licenseProviderType != null) {
+                    typeName = licenseProviderType.FullName;
+                }
+                return GetType().FullName + typeName;
+            }
+        }
+
+        /// <internalonly/>
+        /// <devdoc>
+        /// </devdoc>
+        public override bool Equals(object value) {
+            if (value is LicenseProviderAttribute && value != null) {
+                Type type = ((LicenseProviderAttribute)value).LicenseProvider;
+                if (type == LicenseProvider) {
+                    return true;
+                }
+                else {
+                    if (type != null && type.Equals(LicenseProvider)) {
+                        return true;
+                    }
+                }
+            }
+
+            return false;
+        }
+        
+        /// <devdoc>
+        ///    <para>
+        ///       Returns the hashcode for this object.
+        ///    </para>
+        /// </devdoc>
+        public override int GetHashCode() {
+            return base.GetHashCode();
+        }
+
+    }
+}