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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.ServiceModel.Channels / System / ServiceModel / Channels / XmlByteStreamReader.cs / 1305376 / XmlByteStreamReader.cs
//------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------- namespace System.ServiceModel.Channels { using System; using System.IO; using System.Runtime; using System.Xml; abstract class XmlByteStreamReader : XmlDictionaryReader { string base64StringValue; bool closed; NameTable nameTable; protected ReaderPosition position; protected XmlDictionaryReaderQuotas quotas; bool readBase64AsString; protected XmlByteStreamReader(XmlDictionaryReaderQuotas quotas) { this.quotas = quotas; this.position = ReaderPosition.None; } public override int AttributeCount { get { return 0; } } public override string BaseURI { get { return string.Empty; } } public override bool CanCanonicalize { get { return false; } } public override bool CanReadBinaryContent { get { return true; } } public override bool CanReadValueChunk { get { return false; } } public override bool CanResolveEntity { get { return false; } } public override int Depth { get { return (this.position == ReaderPosition.Content) ? 1 : 0; } } public override bool EOF { get { return (this.position == ReaderPosition.EOF); } } public override bool HasAttributes { get { return false; } } public override bool HasValue { get { return (this.position == ReaderPosition.Content); } } public override bool IsDefault { get { return false; } } public override bool IsEmptyElement { get { return false; } } public override string LocalName { get { return (this.position == ReaderPosition.StartElement) ? ByteStreamMessageUtility.StreamElementName : null; } } public override void MoveToStartElement() { base.MoveToStartElement(); this.position = ReaderPosition.StartElement; } public override XmlNameTable NameTable { get { if (this.nameTable == null) { this.nameTable = new NameTable(); this.nameTable.Add(ByteStreamMessageUtility.StreamElementName); } return this.nameTable; } } public override string NamespaceURI { get { return string.Empty; } } public override XmlNodeType NodeType { get { switch (position) { case ReaderPosition.StartElement: return XmlNodeType.Element; case ReaderPosition.Content: return XmlNodeType.Text; case ReaderPosition.EndElement: return XmlNodeType.EndElement; default: // and StreamPosition.EOF return XmlNodeType.None; } } } public override string Prefix { get { return string.Empty; } } public override XmlDictionaryReaderQuotas Quotas { get { return this.quotas; } } public override ReadState ReadState { get { switch (this.position) { case ReaderPosition.None: return ReadState.Initial; case ReaderPosition.StartElement: case ReaderPosition.Content: case ReaderPosition.EndElement: return ReadState.Interactive; case ReaderPosition.EOF: return ReadState.Closed; default: Fx.Assert("Unknown ReadState hit in XmlByteStreamReader"); return ReadState.Error; } } } public override string Value { get { switch (this.position) { case ReaderPosition.Content: if (!this.readBase64AsString) { this.base64StringValue = Convert.ToBase64String(ReadContentAsBase64()); this.readBase64AsString = true; } return this.base64StringValue; default: return string.Empty; } } } public override void Close() { if (!this.closed) { try { this.OnClose(); } finally { this.position = ReaderPosition.EOF; this.closed = true; } } } protected bool IsClosed { get { return this.closed; } } protected virtual void OnClose() { this.quotas = null; } public override string GetAttribute(int i) { throw FxTrace.Exception.ArgumentOutOfRange("i", i, SR.ArgumentNotInSetOfValidValues); } public override string GetAttribute(string name, string namespaceURI) { return null; } public override string GetAttribute(string name) { return null; } public override string LookupNamespace(string prefix) { if (prefix == string.Empty) { return string.Empty; } else if (prefix == "xml") { return ByteStreamMessageUtility.XmlNamespace; } else if (prefix == "xmlns") { return ByteStreamMessageUtility.XmlNamespaceNamespace; } else { return null; } } public override bool MoveToAttribute(string name, string ns) { return false; } public override bool MoveToAttribute(string name) { return false; } public override bool MoveToElement() { if (this.position == ReaderPosition.None) { this.position = ReaderPosition.StartElement; return true; } return false; } public override bool MoveToFirstAttribute() { return false; } public override bool MoveToNextAttribute() { return false; } public override bool Read() { switch (this.position) { case ReaderPosition.None: position = ReaderPosition.StartElement; return true; case ReaderPosition.StartElement: position = ReaderPosition.Content; return true; case ReaderPosition.Content: position = ReaderPosition.EndElement; return true; case ReaderPosition.EndElement: position = ReaderPosition.EOF; return false; case ReaderPosition.EOF: return false; default: // we should never get here // it means we managed to get into some unknown position in the stream Fx.Assert(false, "Unknown read position in XmlByteStreamReader"); return false; } } public override bool ReadAttributeValue() { return false; } public override abstract int ReadContentAsBase64(byte[] buffer, int index, int count); public override int ReadContentAsBinHex(byte[] buffer, int index, int count) { throw FxTrace.Exception.AsError(new NotSupportedException()); } public override void ResolveEntity() { throw FxTrace.Exception.AsError(new NotSupportedException()); } protected void EnsureInContent() { if (this.position != ReaderPosition.Content) { throw FxTrace.Exception.AsError( new InvalidOperationException(SR.ByteStreamReaderNotInByteStream(ByteStreamMessageUtility.StreamElementName))); } } protected enum ReaderPosition { None, StartElement, Content, EndElement, EOF } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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