Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Xml/System/Xml/Dom/XmlEntity.cs

@@ -0,0 +1,144 @@
+//------------------------------------------------------------------------------
+// <copyright file="XmlEntity.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace System.Xml {
+    using System.Diagnostics;
+
+    // Represents a parsed or unparsed entity in the XML document.
+    public class XmlEntity : XmlNode {
+        string publicId;
+        string systemId;
+        String notationName;
+        String name;
+        String unparsedReplacementStr;
+        String baseURI;
+        XmlLinkedNode lastChild;
+        private bool childrenFoliating;
+
+        internal XmlEntity( String name, String strdata, string publicId, string systemId, String notationName, XmlDocument doc ) : base( doc ) {
+            this.name = doc.NameTable.Add(name);
+            this.publicId = publicId;
+            this.systemId = systemId;
+            this.notationName = notationName;
+            this.unparsedReplacementStr = strdata;
+            this.childrenFoliating = false;
+        }
+
+        // Throws an excption since an entity can not be cloned.
+        public override XmlNode CloneNode(bool deep) {
+
+              throw new InvalidOperationException(Res.GetString(Res.Xdom_Node_Cloning));
+        }
+
+        //
+        // Microsoft extensions
+        //
+
+        // Gets a value indicating whether the node is read-only.
+        public override bool IsReadOnly {
+            get {
+                return true;        // Make entities readonly
+            }
+        }
+
+
+        // Gets the name of the node.
+        public override string Name {
+            get { return name;}
+        }
+
+        // Gets the name of the node without the namespace prefix.
+        public override string LocalName {
+            get { return name;}
+        }
+
+        // Gets the concatenated values of the entity node and all its children.
+        // The property is read-only and when tried to be set, exception will be thrown.
+        public override string InnerText {
+            get { return base.InnerText; }
+            set {
+                throw new InvalidOperationException(Res.GetString(Res.Xdom_Ent_Innertext));
+            }
+        }
+
+        internal override bool IsContainer {
+            get { return true;}
+        }
+
+        internal override XmlLinkedNode LastNode {
+            get {
+                if (lastChild == null && !childrenFoliating)
+                { //expand the unparsedreplacementstring
+                    childrenFoliating = true;
+                    //wrap the replacement string with an element
+                    XmlLoader loader = new XmlLoader();
+                    loader.ExpandEntity(this);
+                }
+                return lastChild;
+            }
+            set { lastChild = value;}
+        }
+
+        internal override bool IsValidChildType( XmlNodeType type ) {
+            return(type == XmlNodeType.Text ||
+                   type == XmlNodeType.Element ||
+                   type == XmlNodeType.ProcessingInstruction ||
+                   type == XmlNodeType.Comment ||
+                   type == XmlNodeType.CDATA ||
+                   type == XmlNodeType.Whitespace ||
+                   type == XmlNodeType.SignificantWhitespace ||
+                   type == XmlNodeType.EntityReference);
+        }
+
+        // Gets the type of the node.
+        public override XmlNodeType NodeType {
+            get { return XmlNodeType.Entity;}
+        }
+
+        // Gets the value of the public identifier on the entity declaration.
+        public String PublicId {
+            get { return publicId;}
+        }
+
+        // Gets the value of the system identifier on the entity declaration.
+        public String SystemId {
+            get { return systemId;}
+        }
+
+        // Gets the name of the optional NDATA attribute on the
+        // entity declaration.
+        public String NotationName {
+            get { return notationName;}
+        }
+
+        //Without override these two functions, we can't guarantee that WriteTo()/WriteContent() functions will never be called
+        public override String OuterXml {
+            get { return String.Empty; }
+        }
+
+        public override String InnerXml {
+            get { return String.Empty; }
+            set { throw new InvalidOperationException( Res.GetString(Res.Xdom_Set_InnerXml ) ); }
+        }
+
+        // Saves the node to the specified XmlWriter.
+        public override void WriteTo(XmlWriter w) {
+        }
+
+        // Saves all the children of the node to the specified XmlWriter.
+        public override void WriteContentTo(XmlWriter w) {
+        }
+
+        public override String BaseURI {
+            get { return baseURI; }
+        }
+
+        internal void SetBaseURI( String inBaseURI ) {
+            baseURI = inBaseURI;
+        }
+    }
+}