Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.ServiceModel/System/ServiceModel/ServiceEndpointTrait.cs

@@ -0,0 +1,73 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+
+namespace System.ServiceModel
+{
+    using System.Runtime;
+    using System.ServiceModel.Channels;
+    using System.ServiceModel.Description;
+
+    sealed class ServiceEndpointTrait<TChannel> : EndpointTrait<TChannel>
+        where TChannel : class
+    {
+        InstanceContext callbackInstance;
+        ServiceEndpoint endpoint;
+
+        public ServiceEndpointTrait(ServiceEndpoint endpoint,
+            InstanceContext callbackInstance)
+        {
+            this.endpoint = endpoint;
+            this.callbackInstance = callbackInstance;
+        }
+
+        public override bool Equals(object obj)
+        {
+            ServiceEndpointTrait<TChannel> trait1 = obj as ServiceEndpointTrait<TChannel>;
+            if (trait1 == null) return false;
+
+            if (!object.ReferenceEquals(this.callbackInstance, trait1.callbackInstance))
+                return false;
+
+            if (!object.ReferenceEquals(this.endpoint, trait1.endpoint))
+                return false;
+
+            return true;
+        }
+
+        public override int GetHashCode()
+        {
+            int hashCode = 0;
+
+            if (this.callbackInstance != null)
+            {
+                hashCode ^= this.callbackInstance.GetHashCode();
+            }
+
+            Fx.Assert(this.endpoint != null, "endpoint should not be null.");
+            hashCode ^= this.endpoint.GetHashCode();
+
+            return hashCode;
+        }
+
+        public override ChannelFactory<TChannel> CreateChannelFactory()
+        {
+            if (this.callbackInstance != null)
+                return CreateDuplexFactory();
+
+            return CreateSimplexFactory();
+        }
+
+        DuplexChannelFactory<TChannel> CreateDuplexFactory()
+        {
+            Fx.Assert(this.endpoint != null, "endpoint should not be null.");
+            return new DuplexChannelFactory<TChannel>(this.callbackInstance, this.endpoint);
+        }
+
+        ChannelFactory<TChannel> CreateSimplexFactory()
+        {
+            Fx.Assert(this.endpoint != null, "endpoint should not be null.");
+            return new ChannelFactory<TChannel>(this.endpoint);
+        }
+    }
+}