XmlBuffer.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / XmlBuffer.cs / 1 / XmlBuffer.cs
                        
                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
#define BINARY
namespace System.ServiceModel 
{
    using System.IO; 
    using System.Xml; 
    using System.Text;
    using System.Collections.Generic; 
    using System.Diagnostics;
    using System.ServiceModel.Channels;

    class XmlBuffer 
    {
        List sections; 
        byte[] buffer; 
        int offset;
        BufferedOutputStream stream; 
        BufferState bufferState;
        XmlDictionaryWriter writer;
        XmlDictionaryReaderQuotas quotas;
 
        enum BufferState
        { 
            Created, 
            Writing,
            Reading, 
        }

        struct Section
        { 
            int offset;
            int size; 
            XmlDictionaryReaderQuotas quotas; 

            public Section(int offset, int size, XmlDictionaryReaderQuotas quotas) 
            {
                this.offset = offset;
                this.size = size;
                this.quotas = quotas; 
            }
 
            public int Offset 
            {
                get { return this.offset; } 
            }

            public int Size
            { 
                get { return this.size; }
            } 
 
            public XmlDictionaryReaderQuotas Quotas
            { 
                get { return this.quotas; }
            }
        }
 
        public XmlBuffer(int maxBufferSize)
        { 
            if (maxBufferSize < 0) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("maxBufferSize", maxBufferSize,
                                                    SR.GetString(SR.ValueMustBeNonNegative))); 
            int initialBufferSize = Math.Min(512, maxBufferSize);
            stream = new BufferedOutputStream(SR.XmlBufferQuotaExceeded, initialBufferSize, maxBufferSize,
                BufferManager.CreateBufferManager(0, int.MaxValue));
            sections = new List(1); 
        }
 
        public int BufferSize 
        {
            get 
            {
                DiagnosticUtility.DebugAssert(bufferState == BufferState.Reading, "Buffer size shuold only be retrieved during Reading state");
                return buffer.Length;
            } 
        }
 
        public int SectionCount 
        {
            get { return this.sections.Count; } 
        }

        public XmlDictionaryWriter OpenSection(XmlDictionaryReaderQuotas quotas)
        { 
            if (bufferState != BufferState.Created)
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException()); 
            bufferState = BufferState.Writing; 
            this.quotas = new XmlDictionaryReaderQuotas();
            quotas.CopyTo(this.quotas); 
            if (this.writer == null)
            {
                this.writer = XmlDictionaryWriter.CreateBinaryWriter(stream, XD.Dictionary, null, true);
            } 
            else
            { 
                ((IXmlBinaryWriterInitializer)this.writer).SetOutput(stream, XD.Dictionary, null, true); 
            }
            return this.writer; 
        }

        public void CloseSection()
        { 
            if (bufferState != BufferState.Writing)
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException()); 
            this.writer.Close(); 
            bufferState = BufferState.Created;
            int size = (int)stream.Length - offset; 
            sections.Add(new Section(offset, size, this.quotas));
            offset += size;
        }
 
        public void Close()
        { 
            if (bufferState != BufferState.Created) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException());
            bufferState = BufferState.Reading; 
            int bufferSize;
            buffer = stream.ToArray(out bufferSize);
            writer = null;
            stream = null; 
        }
 
        Exception CreateInvalidStateException() 
        {
            return new InvalidOperationException(SR.GetString(SR.XmlBufferInInvalidState)); 
        }

        public XmlDictionaryReader GetReader(int sectionIndex)
        { 
            if (bufferState != BufferState.Reading)
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException()); 
            Section section = sections[sectionIndex]; 
            XmlDictionaryReader reader = XmlDictionaryReader.CreateBinaryReader(buffer, section.Offset, section.Size, XD.Dictionary, section.Quotas, null, null);
            reader.MoveToContent(); 
            return reader;
        }

        public void WriteTo(int sectionIndex, XmlWriter writer) 
        {
            if (bufferState != BufferState.Reading) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateInvalidStateException()); 
            XmlDictionaryReader reader = GetReader(sectionIndex);
            try 
            {
                writer.WriteNode(reader, false);
            }
            finally 
            {
                reader.Close(); 
            } 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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XmlBuffer.cs source code in C# .NET

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