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//------------------------------------------------------------------------------
// <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;
}
}
}
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