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|
//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Diagnostics
{
using System.Xml;
using System.Runtime;
using System.Diagnostics;
/// <summary>
/// Very basic performance-oriented XmlWriter implementation. No validation/encoding is made.
/// Namespaces are not supported
/// Minimal formatting support
/// </summary>
internal class PlainXmlWriter : XmlWriter
{
internal class MaxSizeExceededException : Exception
{
}
TraceXPathNavigator navigator;
bool writingAttribute = false;
string currentAttributeName;
string currentAttributePrefix;
string currentAttributeNs;
string currentAttributeText = string.Empty;
public PlainXmlWriter()
: this(-1) //no quota
{
}
public PlainXmlWriter(int maxSize)
{
this.navigator = new TraceXPathNavigator(maxSize);
}
public TraceXPathNavigator Navigator
{
get
{
return this.navigator;
}
}
public override void WriteStartDocument() { }
public override void WriteStartDocument(bool standalone) { }
public override void WriteDocType(string name, string pubid, string sysid, string subset) { }
public override void WriteEndDocument() { }
public override string LookupPrefix(string ns)
{
return this.navigator.LookupPrefix(ns);
}
public override WriteState WriteState
{
get { return this.navigator.WriteState; }
}
public override XmlSpace XmlSpace
{
get { return XmlSpace.Default; }
}
public override string XmlLang
{
get { return string.Empty; }
}
public override void WriteValue(object value)
{
this.navigator.AddText(value.ToString());
}
public override void WriteValue(string value)
{
this.navigator.AddText(value);
}
public override void WriteBase64(byte[] buffer, int offset, int count) { }
public override void WriteStartElement(string prefix, string localName, string ns)
{
#pragma warning disable 618
Fx.Assert(!String.IsNullOrEmpty(localName), "");
#pragma warning restore 618
if (String.IsNullOrEmpty(localName))
{
throw new ArgumentNullException("localName");
}
this.navigator.AddElement(prefix, localName, ns);
}
public override void WriteFullEndElement()
{
WriteEndElement();
}
public override void WriteEndElement()
{
this.navigator.CloseElement();
}
public override void WriteStartAttribute(string prefix, string localName, string ns)
{
#pragma warning disable 618
Fx.Assert(!this.writingAttribute, "");
#pragma warning restore 618
if (this.writingAttribute)
{
throw new InvalidOperationException();
}
this.currentAttributeName = localName;
this.currentAttributePrefix = prefix;
this.currentAttributeNs = ns;
this.currentAttributeText = string.Empty;
this.writingAttribute = true;
}
public override void WriteEndAttribute()
{
#pragma warning disable 618
Fx.Assert(this.writingAttribute, "");
#pragma warning restore 618
if (!this.writingAttribute)
{
throw new InvalidOperationException();
}
this.navigator.AddAttribute(this.currentAttributeName, this.currentAttributeText, this.currentAttributeNs, this.currentAttributePrefix);
this.writingAttribute = false;
}
public override void WriteCData(string text)
{
this.WriteRaw("<![CDATA[" + text + "]]>");
}
public override void WriteComment(string text)
{
this.navigator.AddComment(text);
}
public override void WriteProcessingInstruction(string name, string text)
{
this.navigator.AddProcessingInstruction(name, text);
}
public override void WriteEntityRef(string name)
{
}
public override void WriteCharEntity(char ch)
{
}
public override void WriteSurrogateCharEntity(char lowChar, char highChar)
{
}
public override void WriteWhitespace(string ws)
{
}
public override void WriteString(string text)
{
if (this.writingAttribute)
{
currentAttributeText += text;
}
else
{
this.WriteValue(text);
}
}
public override void WriteChars(Char[] buffer, int index, int count)
{
// Exceptions being thrown as per data found at http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemxmlxmlwriterclasswritecharstopic.asp
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (index < 0)
{
throw new ArgumentOutOfRangeException("index");
}
if (count < 0)
{
throw new ArgumentOutOfRangeException("count");
}
if ((buffer.Length - index) < count)
{
throw new ArgumentException(TraceSR.GetString(TraceSR.WriteCharsInvalidContent));
}
this.WriteString(new string(buffer, index, count));
}
public override void WriteRaw(String data)
{
this.WriteString(data);
}
public override void WriteRaw(Char[] buffer, int index, int count)
{
this.WriteChars(buffer, index, count);
}
public override void Close()
{
}
public override void Flush()
{
}
}
}
|
