Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel/System/ServiceModel/Channels/ContentOnlyMessage.cs

@@ -0,0 +1,106 @@
+//----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------------------
+namespace System.ServiceModel.Channels
+{
+    using System;
+    using System.ServiceModel;
+    using System.IO;
+    using System.ServiceModel.Diagnostics;
+    using System.Xml;
+
+    /// <summary>
+    /// Base class for non-SOAP messages
+    /// </summary>
+    abstract class ContentOnlyMessage : Message
+    {
+        MessageHeaders headers;
+        MessageProperties properties;
+
+        protected ContentOnlyMessage()
+        {
+            this.headers = new MessageHeaders(MessageVersion.None);
+        }
+
+        public override MessageHeaders Headers
+        {
+            get
+            {
+                if (IsDisposed)
+                {
+#pragma warning suppress 56503 // [....], required by base class contract
+                    throw TraceUtility.ThrowHelperError(CreateMessageDisposedException(), this);
+                }
+
+                return this.headers;
+            }
+        }
+
+        public override MessageProperties Properties
+        {
+            get
+            {
+                if (IsDisposed)
+                {
+#pragma warning suppress 56503 // [....], required by base class contract
+                    throw TraceUtility.ThrowHelperError(CreateMessageDisposedException(), this);
+                }
+
+                if (this.properties == null)
+                {
+                    this.properties = new MessageProperties();
+                }
+
+                return this.properties;
+            }
+        }
+
+        public override MessageVersion Version
+        {
+            get
+            {
+                return headers.MessageVersion;
+            }
+        }
+
+        protected override void OnBodyToString(XmlDictionaryWriter writer)
+        {
+            OnWriteBodyContents(writer);
+        }
+    }
+
+    class StringMessage : ContentOnlyMessage
+    {
+        string data;
+
+        public StringMessage(string data)
+            : base()
+        {
+            this.data = data;
+        }
+
+        public override bool IsEmpty
+        {
+            get
+            {
+                return String.IsNullOrEmpty(this.data);
+            }
+        }
+
+        protected override void OnWriteBodyContents(XmlDictionaryWriter writer)
+        {
+            if (data != null && data.Length > 0)
+            {
+                writer.WriteElementString("BODY", data);
+            }
+        }
+    }
+
+    class NullMessage : StringMessage
+    {
+        public NullMessage()
+            : base(string.Empty)
+        {
+        }
+    }
+}