MetadataFile.cs source code in C# .NET

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Code:

                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / xsp / System / Web / Extensions / Compilation / WCFModel / MetadataFile.cs / 3 / MetadataFile.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//    Copyright (C) Microsoft Corporation. All Rights Reserved.
// 
//----------------------------------------------------------------------------- 
//
// This code is shared between ndp\fx\src\xsp\System\Web\Extensions\Compilation\WCFModel 
//   and wizard\vsdesigner\designer\microsoft\vsdesigner\WCFModel. 
//    Please make sure the code files between those two directories are alway in [....] when you make any changes to this code.
//    And always test these code in both places before check in. 
//  The code under ndp\fx\src\xsp\System\Web\Extensions\Compilation\XmlSerializer might have to be regerenated when
//   the format of the svcmap file is changed, or class structure has been changed in this directory. Please follow the HowTo file
//   under Compilation directory to see how to regerenate that code.
// 

using System; 
using System.Collections; 
using System.Diagnostics;
using System.Globalization; 
using System.IO;
using System.Xml;
using System.Xml.Schema;
using System.Web.Services; 
using Discovery = System.Web.Services.Discovery;
using Description = System.Web.Services.Description; 
using MetadataSection = System.ServiceModel.Description.MetadataSection; 

using XmlSerialization = System.Xml.Serialization; 
//using WebDescriptions = System.Web.Services.Descriptions

#if WEB_EXTENSIONS_CODE
using System.Web.Resources; 
#else
using Microsoft.VSDesigner.Resources.Microsoft.VSDesigner; 
#endif 

#if WEB_EXTENSIONS_CODE 
namespace System.Web.Compilation.WCFModel
#else
namespace Microsoft.VSDesigner.WCFModel
#endif 
{
 
    ///  
    /// This class presents a single metadata file in the ReferenceGroup
    ///  
    /// 
#if WEB_EXTENSIONS_CODE
    internal sealed class MetadataFile : ExternalFile
#else 
    [CLSCompliant(true)]
    public sealed class MetadataFile : ExternalFile 
#endif 
    {
 
        // Default File Name
        public const string DEFAULT_FILE_NAME = "service";

        private MetadataType m_MetadataType; 
        private string m_SourceUrl;
 
        // A GUID string 
        private string m_ID;
 
        private int m_SourceId;

        // properties to merge metadata
        private bool m_Ignore; 
        private bool m_IsMergeResult;
 
        private int SOURCE_ID_NOT_SPECIFIED = 0; 

        private MetadataContent m_CachedMetadata; 

        // Content of the metadata file, one of them must be
        private byte[] m_BinaryContent;
 
        /// 
        /// Constructor 
        ///  
        ///  Must support a default construct for XmlSerializer
        public MetadataFile() 
        {
            m_ID = Guid.NewGuid().ToString();
            m_BinaryContent = new byte[] {};
        } 

 
        ///  
        /// Constructor
        ///  
        /// File Name
        /// SourceUrl
        /// File Content
        ///  
        public MetadataFile(string name, string url, string content) : base(name)
        { 
            m_ID = Guid.NewGuid().ToString(); 

            m_SourceUrl = url; 

            if (content == null)
            {
                throw new ArgumentNullException("content"); 
            }
 
            LoadContent(content); 
        }
 
        /// 
        /// Constructor
        /// 
        /// File Name 
        /// SourceUrl
        /// File Content 
        ///  
        public MetadataFile(string name, string url, byte[] byteContent) : base(name)
        { 
            m_ID = Guid.NewGuid().ToString();

            m_SourceUrl = url;
 
            if (byteContent == null)
            { 
                throw new ArgumentNullException("byteContent"); 
            }
 
            LoadContent(byteContent);
        }

        ///  
        /// Retrieves the file content in binary format
        ///  
        ///  
        /// 
        public byte[] BinaryContent 
        {
            get
            {
                return m_BinaryContent; 
            }
        } 
 
        /// 
        /// Cached state 
        /// 
        /// 
        /// 
        private MetadataContent CachedMetadata 
        {
            get 
            { 
                if (m_CachedMetadata == null)
                { 
                    m_CachedMetadata = LoadMetadataContent(m_MetadataType);
                }
                return m_CachedMetadata;
            } 
        }
 
 
        /// 
        /// Retrieves the file content 
        /// 
        /// 
        /// 
        public string Content 
        {
            get 
            { 
                StreamReader memReader = new StreamReader(new MemoryStream(m_BinaryContent));
                return memReader.ReadToEnd(); 
            }
        }

        ///  
        /// The Type of Metadata
        ///  
        ///  
        /// 
        [XmlSerialization.XmlAttribute("MetadataType")] 
        public MetadataType FileType
        {
            get
            { 
                return m_MetadataType;
            } 
            set 
            {
                m_MetadataType = value; 
            }
        }

        ///  
        ///  GUID string, it is used to track a metadata item (when it is updated)
        ///  
        ///  
        /// 
        [XmlSerialization.XmlAttribute()] 
        public string ID
        {
            get
            { 
                return m_ID;
            } 
            set 
            {
                m_ID = value; 
            }
        }

        ///  
        /// If it is true, the metadata file will be ignored by the code generator
        ///  
        ///  
        /// 
        [XmlSerialization.XmlAttribute()] 
        public bool Ignore
        {
            get
            { 
                return m_Ignore;
            } 
            set 
            {
                m_Ignore = value; 
            }
        }

        ///  
        /// A special attribute used by XmlSerializer to decide whether Ignore attribute exists
        ///  
        ///  
        /// 
        [XmlSerialization.XmlIgnore()] 
        public bool IgnoreSpecified
        {
            get
            { 
                return m_Ignore;
            } 
            set 
            {
                if (!value) 
                {
                    m_Ignore = false;
                }
            } 
        }
 
        ///  
        /// whether the metadata file is a result of merging
        ///  
        /// 
        /// 
        [XmlSerialization.XmlAttribute()]
        public bool IsMergeResult 
        {
            get 
            { 
                return m_IsMergeResult;
            } 
            set
            {
                m_IsMergeResult = value;
            } 
        }
 
        ///  
        /// A special attribute used by XmlSerializer to decide whether IsMergeResult attribute exists
        ///  
        /// 
        /// 
        [XmlSerialization.XmlIgnore()]
        public bool IsMergeResultSpecified 
        {
            get 
            { 
                return m_IsMergeResult;
            } 
            set
            {
                if (!value)
                { 
                    m_IsMergeResult = false;
                } 
            } 
        }
 
        /// 
        /// Retrieves the content of a discovery file
        /// 
        ///  
        /// 
        public Discovery.DiscoveryDocument MetadataDiscoveryDocument 
        { 
            get
            { 
                return CachedMetadata.MetadataDiscoveryDocument;
            }
        }
 
        /// 
        /// format error 
        ///  
        /// 
        ///  
        [XmlSerialization.XmlIgnore()]
        public Exception MetadataFormatError
        {
            get 
            {
                return CachedMetadata.MetadataFormatError; 
            } 
        }
 
        /// 
        /// Retrieves the content of a WSDL file
        /// 
        ///  
        /// 
        public Description.ServiceDescription MetadataServiceDescription 
        { 
            get
            { 
                return CachedMetadata.MetadataServiceDescription;
            }
        }
 
        /// 
        /// Retrieves the content of a schema file 
        ///  
        /// 
        ///  
        public XmlSchema MetadataXmlSchema
        {
            get
            { 
                return CachedMetadata.MetadataXmlSchema;
            } 
        } 

        ///  
        /// Retrieves the content of an Xml file
        /// 
        /// 
        ///  
        public XmlDocument MetadataXmlDocument
        { 
            get 
            {
                return CachedMetadata.MetadataXmlDocument; 
            }
        }

        ///  
        /// the SourceId links the the SourceId in the MetadataSource table
        ///  
        ///  
        /// 
        [XmlSerialization.XmlAttribute()] 
        public int SourceId
        {
            get
            { 
                return m_SourceId;
            } 
            set 
            {
                if (value < 0) { 
                    Debug.Fail("Source ID shouldn't be a nagtive number");
                    throw new ArgumentException(WCFModelStrings.ReferenceGroup_InvalidSourceId);
                }
                m_SourceId = value; 
            }
        } 
 
        /// 
        /// A special attribute used by XmlSerializer to decide whether SourceId attribute exists 
        /// 
        /// 
        /// 
        [XmlSerialization.XmlIgnore()] 
        public bool SourceIdSpecified
        { 
            get 
            {
                return m_SourceId != SOURCE_ID_NOT_SPECIFIED; 
            }
            set
            {
                if (!value) { 
                    m_SourceId = SOURCE_ID_NOT_SPECIFIED;
                } 
            } 
        }
 
        /// 
        ///  The sourceUrl of the metadata file
        /// 
        ///  
        /// 
        [XmlSerialization.XmlAttribute()] 
        public string SourceUrl 
        {
            get 
            {
                return m_SourceUrl;
            }
            set 
            {
                m_SourceUrl = value; 
            } 
        }
 
        /// 
        /// Retrieves the TargetNamespace when it is a schema item or a WSDL item
        /// 
        ///  
        /// 
        public string TargetNamespace 
        { 
            get
            { 
                return CachedMetadata.TargetNamespace;
            }
        }
 
        /// 
        /// Detemine the type of a metadata item 
        ///  
        /// 
        /// File Type 
        /// 
        private MetadataType DetermineFileType(XmlReader reader)
        {
            try 
            {
                if (reader.IsStartElement(XmlStrings.WSDL.Elements.Root, XmlStrings.WSDL.NamespaceUri)) 
                { 
                    return MetadataType.Wsdl;
                } 
                else if (reader.IsStartElement(XmlStrings.XmlSchema.Elements.Root, XmlStrings.XmlSchema.NamespaceUri))
                {
                    return MetadataType.Schema;
                } 
                else if (reader.IsStartElement(XmlStrings.WSPolicy.Elements.Policy, XmlStrings.WSPolicy.NamespaceUri)
                         || reader.IsStartElement(XmlStrings.WSPolicy.Elements.Policy, XmlStrings.WSPolicy.NamespaceUri15)) 
 
                {
                    return MetadataType.Policy; 
                }
                else if (reader.IsStartElement(XmlStrings.DISCO.Elements.Root, XmlStrings.DISCO.NamespaceUri))
                {
                    return MetadataType.Disco; 
                }
                else if (reader.IsStartElement(XmlStrings.DataServices.Elements.Root, XmlStrings.DataServices.NamespaceUri)) 
                { 
                    return MetadataType.Edmx;
                } 
                else
                {
                    return MetadataType.Xml;
                } 
            }
            catch (XmlException) 
            { 
                // This must mean that the document isn't an XML Document so we continue trying other things...
                return MetadataType.Unknown; 
            }
        }

        ///  
        /// return the default extension
        ///  
        ///  
        /// 
        public string GetDefaultExtension() 
        {
            switch (m_MetadataType)
            {
                case MetadataType.Disco: 
                    return "disco";
                case MetadataType.Wsdl: 
                    return "wsdl"; 
                case MetadataType.Schema:
                    return "xsd"; 
                case MetadataType.Xml:
                    return "xml";
                case MetadataType.Policy:
                    return "xml"; 
                case MetadataType.Edmx:
                    return "Edmx"; 
                default: 
                    return "data";
            } 
        }

        /// 
        /// return the default filename without extension 
        /// 
        ///  
        ///  
        public string GetDefaultFileName()
        { 
            if (!String.IsNullOrEmpty(TargetNamespace))
            {
                string ns = TargetNamespace;
                if (!ns.EndsWith("/", StringComparison.Ordinal)) 
                {
                    int i = ns.LastIndexOfAny(Path.GetInvalidFileNameChars()); 
                    if (i >= 0) 
                    {
                        ns = ns.Substring(i + 1); 
                    }

                    string defaultExtension = "." + GetDefaultExtension();
                    if (ns.Length > defaultExtension.Length && ns.EndsWith(defaultExtension, StringComparison.OrdinalIgnoreCase)) 
                    {
                        ns = ns.Substring(0, ns.Length - defaultExtension.Length); 
                    } 

                    if (ns.Length > 0) 
                    {
                        return ns;
                    }
                } 
            }
 
            return DEFAULT_FILE_NAME; 
        }
 
        /// 
        /// Load the content of a Metadata item into the object model
        /// 
        ///  
        /// 
        internal void LoadContent(byte[] byteContent) 
        { 
            m_BinaryContent = byteContent;
            LoadContentFromTextReader(new StreamReader(new MemoryStream(byteContent))); 
        }

        /// 
        /// Load the content of a Metadata item into the object model 
        /// 
        ///  
        ///  
        internal void LoadContent(string content)
        { 
            MemoryStream memStream = new MemoryStream();
            StreamWriter contentWriter = new StreamWriter(memStream);
            contentWriter.Write(content);
            contentWriter.Flush(); 
            m_BinaryContent = memStream.ToArray();
 
            LoadContentFromTextReader(new StringReader(content)); 
        }
 
        /// 
        /// Load the content of a Metadata item into the object model
        /// 
        ///  
        /// 
        private void LoadContentFromTextReader(TextReader contentReader) 
        { 
            if (contentReader == null)
            { 
                throw new ArgumentNullException("contentReader");
            }

            // reset... 
            ErrorInLoading = null;
 
            m_CachedMetadata = null; 

            using (XmlTextReader xmlReader = new XmlTextReader(contentReader)) 
            {
                if (m_MetadataType == MetadataType.Unknown)
                {
                    // If we don't know the metedata type, we try to sniff it... 
                    MetadataType fileType = DetermineFileType(xmlReader);
 
                    // try 
                    m_CachedMetadata = LoadMetadataContent(fileType, xmlReader);
                    if (m_CachedMetadata.MetadataFormatError == null) 
                    {
                        m_MetadataType = fileType;
                    }
                } 
            }
        } 
 
        /// 
        ///  the function is called when the metadata is removed, and we need clean up the content 
        /// 
        /// 
        internal void CleanUpContent()
        { 
            ErrorInLoading = null;
            m_BinaryContent = new byte[] {}; 
 
            m_CachedMetadata = null;
        } 

        /// 
        /// Load schema/wsdl model from binary content.  -- Parse the metadata content
        ///  
        /// 
        ///  
        private MetadataContent LoadMetadataContent(MetadataType fileType) 
        {
            if (ErrorInLoading != null) 
            {
                return new MetadataContent(ErrorInLoading);
            }
            using (XmlTextReader xmlReader = new XmlTextReader(new StreamReader(new MemoryStream(m_BinaryContent)))) 
            {
                return LoadMetadataContent(fileType, xmlReader); 
            } 
        }
 
        /// 
        /// Load schema/wsdl model from text reader.  -- it will parse the metadata content.
        /// 
        ///  
        /// 
        private MetadataContent LoadMetadataContent(MetadataType fileType, XmlTextReader xmlReader) 
        { 
            MetadataContent cachedMetadata = new MetadataContent();
 
            try
            {
                switch (fileType)
                { 
                    case MetadataType.Disco:
                        cachedMetadata = new MetadataContent(Discovery.DiscoveryDocument.Read(xmlReader)); 
                        break; 
                    case MetadataType.Wsdl:
                        cachedMetadata = new MetadataContent(Description.ServiceDescription.Read(xmlReader)); 
                        cachedMetadata.MetadataServiceDescription.RetrievalUrl = GetMetadataSourceUrl();
                        break;
                    case MetadataType.Schema:
                        cachedMetadata = new MetadataContent(XmlSchema.Read(xmlReader, null)); 
                        cachedMetadata.MetadataXmlSchema.SourceUri = GetMetadataSourceUrl();
                        break; 
                    case MetadataType.Unknown: 
                        // For unknown types, we don't do nothing...
                        break; 
                    default:
                        Debug.Assert(fileType == MetadataType.Xml || fileType == MetadataType.Policy || fileType == MetadataType.Edmx);
                        XmlDocument tempDoc = new XmlDocument();
                        tempDoc.Load(xmlReader); 
                        cachedMetadata = new MetadataContent(tempDoc);
                        break; 
                } 
            }
            catch (Exception ex) 
            {
                cachedMetadata = new MetadataContent(ex);
            }
 
            return cachedMetadata;
        } 
 
        /// 
        /// convert metadata file to MetadataSection (to feed code/proxy generator) 
        ///  We don't reuse the buffered object model, because the generator could modify & corrupt them.
        /// 
        /// 
        internal MetadataSection CreateMetadataSection() 
        {
            MetadataContent metadata = LoadMetadataContent(m_MetadataType); 
            if (metadata.MetadataFormatError != null) 
            {
                throw metadata.MetadataFormatError; 
            }

            MetadataSection metadataSection = null;
 
            switch (FileType)
            { 
                case MetadataType.Unknown: 
                    break;
                case MetadataType.Disco: 
                    if (metadata.MetadataServiceDescription != null)
                    {
                        metadataSection = MetadataSection.CreateFromServiceDescription(metadata.MetadataServiceDescription);
                    } 
                    break;
                case MetadataType.Wsdl: 
                    // We need to make a copy of the WSDL object model since the act of importing it actuall 
                    // modifies it, and we don't want the cached instance to be polluted...
                    System.Web.Services.Description.ServiceDescription description = metadata.MetadataServiceDescription; 
                    if (description != null)
                    {
                        metadataSection = MetadataSection.CreateFromServiceDescription(description);
                    } 
                    break;
                case MetadataType.Schema: 
                    if (metadata.MetadataXmlSchema != null) 
                    {
                        metadataSection = MetadataSection.CreateFromSchema(metadata.MetadataXmlSchema); 
                    }
                    break;
                case MetadataFile.MetadataType.Policy:
                    if (metadata.MetadataXmlDocument != null) 
                    {
                        metadataSection = MetadataSection.CreateFromPolicy(metadata.MetadataXmlDocument.DocumentElement, null); 
                    } 
                    break;
                case MetadataFile.MetadataType.Xml: 
                case MetadataFile.MetadataType.Edmx:
                    if (metadata.MetadataXmlDocument != null)
                    {
                        metadataSection = new MetadataSection(null, null, metadata.MetadataXmlDocument.DocumentElement); 
                    }
                    break; 
                default: 
                    System.Diagnostics.Debug.Fail("Unknown Type?");
                    break; 
            }
            return metadataSection;
        }
 
        /// 
        /// Metadata source Url is used in error messages 
        ///  
        /// 
        internal string GetMetadataSourceUrl() 
        {
            if (String.IsNullOrEmpty(SourceUrl))
            {
                return FileName; 
            }
            else 
            { 
                return SourceUrl;
            } 
        }

        /// 
        /// Metadata File Type Enum 
        /// 
        ///  
        public enum MetadataType 
        {
            [XmlSerialization.XmlEnum(Name = "Unknown")] 
            Unknown = 0,
            [XmlSerialization.XmlEnum(Name = "Disco")]
            Disco = 1,
            [XmlSerialization.XmlEnum(Name = "Wsdl")] 
            Wsdl = 2,
            [XmlSerialization.XmlEnum(Name = "Schema")] 
            Schema = 3, 
            [XmlSerialization.XmlEnum(Name = "Policy")]
            Policy = 4, 
            [XmlSerialization.XmlEnum(Name = "Xml")]
            Xml = 5,
            [XmlSerialization.XmlEnum(Name = "Edmx")]
            Edmx = 6, 
        }
 
        ///  
        /// Metadata contained inside the file. Only one of field is valid, which depends on the MetadataType
        ///  
        /// 
        private class MetadataContent {

            private Discovery.DiscoveryDocument m_MetadataDiscoveryDocument; 
            private Description.ServiceDescription m_MetadataServiceDescription;
            private XmlSchema m_MetadataXmlSchema; 
            private XmlDocument m_MetadataXmlDocument; 

            private Exception m_MetadataFormatError; 

            private string m_TargetNamespace;

            internal MetadataContent() { 
                m_TargetNamespace = String.Empty;
            } 
 
            internal MetadataContent(Discovery.DiscoveryDocument discoveryDocument) {
                m_MetadataDiscoveryDocument = discoveryDocument; 
                m_TargetNamespace = String.Empty;
            }

            internal MetadataContent(Description.ServiceDescription serviceDescription) { 
                m_MetadataServiceDescription = serviceDescription;
                m_TargetNamespace = serviceDescription.TargetNamespace; 
            } 

            internal MetadataContent(XmlSchema schema) { 
                m_MetadataXmlSchema = schema;
                m_TargetNamespace = schema.TargetNamespace;
            }
 
            internal MetadataContent(XmlDocument document) {
                m_MetadataXmlDocument = document; 
                m_TargetNamespace = String.Empty; 
            }
 
            internal MetadataContent(Exception metadataFormatError) {
                m_MetadataFormatError = metadataFormatError;
            }
 
            /// 
            /// Retrieves the content of a discovery file 
            ///  
            /// 
            ///  
            public Discovery.DiscoveryDocument MetadataDiscoveryDocument
            {
                get
                { 
                    return m_MetadataDiscoveryDocument;
                } 
            } 

            ///  
            /// Error message if
            /// 
            /// 
            ///  
            public Exception MetadataFormatError
            { 
                get 
                {
                    return m_MetadataFormatError; 
                }
            }

            ///  
            /// Retrieves the content of a WSDL file
            ///  
            ///  
            /// 
            public Description.ServiceDescription MetadataServiceDescription 
            {
                get
                {
                    return m_MetadataServiceDescription; 
                }
            } 
 
            /// 
            /// Retrieves the content of a schema file 
            /// 
            /// 
            /// 
            public XmlSchema MetadataXmlSchema 
            {
                get 
                { 
                    return m_MetadataXmlSchema;
                } 
            }

            /// 
            /// Retrieves the content of an Xml file 
            /// 
            ///  
            ///  
            public XmlDocument MetadataXmlDocument
            { 
                get
                {
                    return m_MetadataXmlDocument;
                } 
            }
 
            ///  
            /// Retrieves the TargetNamespace when it is a schema item or a WSDL item
            ///  
            /// 
            /// 
            public string TargetNamespace
            { 
                get
                { 
                    return m_TargetNamespace; 
                }
            } 

        }
    }
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------ 
// 
//    Copyright (C) Microsoft Corporation. All Rights Reserved.
// 
//----------------------------------------------------------------------------- 
//
// This code is shared between ndp\fx\src\xsp\System\Web\Extensions\Compilation\WCFModel 
//   and wizard\vsdesigner\designer\microsoft\vsdesigner\WCFModel. 
//    Please make sure the code files between those two directories are alway in [....] when you make any changes to this code.
//    And always test these code in both places before check in. 
//  The code under ndp\fx\src\xsp\System\Web\Extensions\Compilation\XmlSerializer might have to be regerenated when
//   the format of the svcmap file is changed, or class structure has been changed in this directory. Please follow the HowTo file
//   under Compilation directory to see how to regerenate that code.
// 

using System; 
using System.Collections; 
using System.Diagnostics;
using System.Globalization; 
using System.IO;
using System.Xml;
using System.Xml.Schema;
using System.Web.Services; 
using Discovery = System.Web.Services.Discovery;
using Description = System.Web.Services.Description; 
using MetadataSection = System.ServiceModel.Description.MetadataSection; 

using XmlSerialization = System.Xml.Serialization; 
//using WebDescriptions = System.Web.Services.Descriptions

#if WEB_EXTENSIONS_CODE
using System.Web.Resources; 
#else
using Microsoft.VSDesigner.Resources.Microsoft.VSDesigner; 
#endif 

#if WEB_EXTENSIONS_CODE 
namespace System.Web.Compilation.WCFModel
#else
namespace Microsoft.VSDesigner.WCFModel
#endif 
{
 
    ///  
    /// This class presents a single metadata file in the ReferenceGroup
    ///  
    /// 
#if WEB_EXTENSIONS_CODE
    internal sealed class MetadataFile : ExternalFile
#else 
    [CLSCompliant(true)]
    public sealed class MetadataFile : ExternalFile 
#endif 
    {
 
        // Default File Name
        public const string DEFAULT_FILE_NAME = "service";

        private MetadataType m_MetadataType; 
        private string m_SourceUrl;
 
        // A GUID string 
        private string m_ID;
 
        private int m_SourceId;

        // properties to merge metadata
        private bool m_Ignore; 
        private bool m_IsMergeResult;
 
        private int SOURCE_ID_NOT_SPECIFIED = 0; 

        private MetadataContent m_CachedMetadata; 

        // Content of the metadata file, one of them must be
        private byte[] m_BinaryContent;
 
        /// 
        /// Constructor 
        ///  
        ///  Must support a default construct for XmlSerializer
        public MetadataFile() 
        {
            m_ID = Guid.NewGuid().ToString();
            m_BinaryContent = new byte[] {};
        } 

 
        ///  
        /// Constructor
        ///  
        /// File Name
        /// SourceUrl
        /// File Content
        ///  
        public MetadataFile(string name, string url, string content) : base(name)
        { 
            m_ID = Guid.NewGuid().ToString(); 

            m_SourceUrl = url; 

            if (content == null)
            {
                throw new ArgumentNullException("content"); 
            }
 
            LoadContent(content); 
        }
 
        /// 
        /// Constructor
        /// 
        /// File Name 
        /// SourceUrl
        /// File Content 
        ///  
        public MetadataFile(string name, string url, byte[] byteContent) : base(name)
        { 
            m_ID = Guid.NewGuid().ToString();

            m_SourceUrl = url;
 
            if (byteContent == null)
            { 
                throw new ArgumentNullException("byteContent"); 
            }
 
            LoadContent(byteContent);
        }

        ///  
        /// Retrieves the file content in binary format
        ///  
        ///  
        /// 
        public byte[] BinaryContent 
        {
            get
            {
                return m_BinaryContent; 
            }
        } 
 
        /// 
        /// Cached state 
        /// 
        /// 
        /// 
        private MetadataContent CachedMetadata 
        {
            get 
            { 
                if (m_CachedMetadata == null)
                { 
                    m_CachedMetadata = LoadMetadataContent(m_MetadataType);
                }
                return m_CachedMetadata;
            } 
        }
 
 
        /// 
        /// Retrieves the file content 
        /// 
        /// 
        /// 
        public string Content 
        {
            get 
            { 
                StreamReader memReader = new StreamReader(new MemoryStream(m_BinaryContent));
                return memReader.ReadToEnd(); 
            }
        }

        ///  
        /// The Type of Metadata
        ///  
        ///  
        /// 
        [XmlSerialization.XmlAttribute("MetadataType")] 
        public MetadataType FileType
        {
            get
            { 
                return m_MetadataType;
            } 
            set 
            {
                m_MetadataType = value; 
            }
        }

        ///  
        ///  GUID string, it is used to track a metadata item (when it is updated)
        ///  
        ///  
        /// 
        [XmlSerialization.XmlAttribute()] 
        public string ID
        {
            get
            { 
                return m_ID;
            } 
            set 
            {
                m_ID = value; 
            }
        }

        ///  
        /// If it is true, the metadata file will be ignored by the code generator
        ///  
        ///  
        /// 
        [XmlSerialization.XmlAttribute()] 
        public bool Ignore
        {
            get
            { 
                return m_Ignore;
            } 
            set 
            {
                m_Ignore = value; 
            }
        }

        ///  
        /// A special attribute used by XmlSerializer to decide whether Ignore attribute exists
        ///  
        ///  
        /// 
        [XmlSerialization.XmlIgnore()] 
        public bool IgnoreSpecified
        {
            get
            { 
                return m_Ignore;
            } 
            set 
            {
                if (!value) 
                {
                    m_Ignore = false;
                }
            } 
        }
 
        ///  
        /// whether the metadata file is a result of merging
        ///  
        /// 
        /// 
        [XmlSerialization.XmlAttribute()]
        public bool IsMergeResult 
        {
            get 
            { 
                return m_IsMergeResult;
            } 
            set
            {
                m_IsMergeResult = value;
            } 
        }
 
        ///  
        /// A special attribute used by XmlSerializer to decide whether IsMergeResult attribute exists
        ///  
        /// 
        /// 
        [XmlSerialization.XmlIgnore()]
        public bool IsMergeResultSpecified 
        {
            get 
            { 
                return m_IsMergeResult;
            } 
            set
            {
                if (!value)
                { 
                    m_IsMergeResult = false;
                } 
            } 
        }
 
        /// 
        /// Retrieves the content of a discovery file
        /// 
        ///  
        /// 
        public Discovery.DiscoveryDocument MetadataDiscoveryDocument 
        { 
            get
            { 
                return CachedMetadata.MetadataDiscoveryDocument;
            }
        }
 
        /// 
        /// format error 
        ///  
        /// 
        ///  
        [XmlSerialization.XmlIgnore()]
        public Exception MetadataFormatError
        {
            get 
            {
                return CachedMetadata.MetadataFormatError; 
            } 
        }
 
        /// 
        /// Retrieves the content of a WSDL file
        /// 
        ///  
        /// 
        public Description.ServiceDescription MetadataServiceDescription 
        { 
            get
            { 
                return CachedMetadata.MetadataServiceDescription;
            }
        }
 
        /// 
        /// Retrieves the content of a schema file 
        ///  
        /// 
        ///  
        public XmlSchema MetadataXmlSchema
        {
            get
            { 
                return CachedMetadata.MetadataXmlSchema;
            } 
        } 

        ///  
        /// Retrieves the content of an Xml file
        /// 
        /// 
        ///  
        public XmlDocument MetadataXmlDocument
        { 
            get 
            {
                return CachedMetadata.MetadataXmlDocument; 
            }
        }

        ///  
        /// the SourceId links the the SourceId in the MetadataSource table
        ///  
        ///  
        /// 
        [XmlSerialization.XmlAttribute()] 
        public int SourceId
        {
            get
            { 
                return m_SourceId;
            } 
            set 
            {
                if (value < 0) { 
                    Debug.Fail("Source ID shouldn't be a nagtive number");
                    throw new ArgumentException(WCFModelStrings.ReferenceGroup_InvalidSourceId);
                }
                m_SourceId = value; 
            }
        } 
 
        /// 
        /// A special attribute used by XmlSerializer to decide whether SourceId attribute exists 
        /// 
        /// 
        /// 
        [XmlSerialization.XmlIgnore()] 
        public bool SourceIdSpecified
        { 
            get 
            {
                return m_SourceId != SOURCE_ID_NOT_SPECIFIED; 
            }
            set
            {
                if (!value) { 
                    m_SourceId = SOURCE_ID_NOT_SPECIFIED;
                } 
            } 
        }
 
        /// 
        ///  The sourceUrl of the metadata file
        /// 
        ///  
        /// 
        [XmlSerialization.XmlAttribute()] 
        public string SourceUrl 
        {
            get 
            {
                return m_SourceUrl;
            }
            set 
            {
                m_SourceUrl = value; 
            } 
        }
 
        /// 
        /// Retrieves the TargetNamespace when it is a schema item or a WSDL item
        /// 
        ///  
        /// 
        public string TargetNamespace 
        { 
            get
            { 
                return CachedMetadata.TargetNamespace;
            }
        }
 
        /// 
        /// Detemine the type of a metadata item 
        ///  
        /// 
        /// File Type 
        /// 
        private MetadataType DetermineFileType(XmlReader reader)
        {
            try 
            {
                if (reader.IsStartElement(XmlStrings.WSDL.Elements.Root, XmlStrings.WSDL.NamespaceUri)) 
                { 
                    return MetadataType.Wsdl;
                } 
                else if (reader.IsStartElement(XmlStrings.XmlSchema.Elements.Root, XmlStrings.XmlSchema.NamespaceUri))
                {
                    return MetadataType.Schema;
                } 
                else if (reader.IsStartElement(XmlStrings.WSPolicy.Elements.Policy, XmlStrings.WSPolicy.NamespaceUri)
                         || reader.IsStartElement(XmlStrings.WSPolicy.Elements.Policy, XmlStrings.WSPolicy.NamespaceUri15)) 
 
                {
                    return MetadataType.Policy; 
                }
                else if (reader.IsStartElement(XmlStrings.DISCO.Elements.Root, XmlStrings.DISCO.NamespaceUri))
                {
                    return MetadataType.Disco; 
                }
                else if (reader.IsStartElement(XmlStrings.DataServices.Elements.Root, XmlStrings.DataServices.NamespaceUri)) 
                { 
                    return MetadataType.Edmx;
                } 
                else
                {
                    return MetadataType.Xml;
                } 
            }
            catch (XmlException) 
            { 
                // This must mean that the document isn't an XML Document so we continue trying other things...
                return MetadataType.Unknown; 
            }
        }

        ///  
        /// return the default extension
        ///  
        ///  
        /// 
        public string GetDefaultExtension() 
        {
            switch (m_MetadataType)
            {
                case MetadataType.Disco: 
                    return "disco";
                case MetadataType.Wsdl: 
                    return "wsdl"; 
                case MetadataType.Schema:
                    return "xsd"; 
                case MetadataType.Xml:
                    return "xml";
                case MetadataType.Policy:
                    return "xml"; 
                case MetadataType.Edmx:
                    return "Edmx"; 
                default: 
                    return "data";
            } 
        }

        /// 
        /// return the default filename without extension 
        /// 
        ///  
        ///  
        public string GetDefaultFileName()
        { 
            if (!String.IsNullOrEmpty(TargetNamespace))
            {
                string ns = TargetNamespace;
                if (!ns.EndsWith("/", StringComparison.Ordinal)) 
                {
                    int i = ns.LastIndexOfAny(Path.GetInvalidFileNameChars()); 
                    if (i >= 0) 
                    {
                        ns = ns.Substring(i + 1); 
                    }

                    string defaultExtension = "." + GetDefaultExtension();
                    if (ns.Length > defaultExtension.Length && ns.EndsWith(defaultExtension, StringComparison.OrdinalIgnoreCase)) 
                    {
                        ns = ns.Substring(0, ns.Length - defaultExtension.Length); 
                    } 

                    if (ns.Length > 0) 
                    {
                        return ns;
                    }
                } 
            }
 
            return DEFAULT_FILE_NAME; 
        }
 
        /// 
        /// Load the content of a Metadata item into the object model
        /// 
        ///  
        /// 
        internal void LoadContent(byte[] byteContent) 
        { 
            m_BinaryContent = byteContent;
            LoadContentFromTextReader(new StreamReader(new MemoryStream(byteContent))); 
        }

        /// 
        /// Load the content of a Metadata item into the object model 
        /// 
        ///  
        ///  
        internal void LoadContent(string content)
        { 
            MemoryStream memStream = new MemoryStream();
            StreamWriter contentWriter = new StreamWriter(memStream);
            contentWriter.Write(content);
            contentWriter.Flush(); 
            m_BinaryContent = memStream.ToArray();
 
            LoadContentFromTextReader(new StringReader(content)); 
        }
 
        /// 
        /// Load the content of a Metadata item into the object model
        /// 
        ///  
        /// 
        private void LoadContentFromTextReader(TextReader contentReader) 
        { 
            if (contentReader == null)
            { 
                throw new ArgumentNullException("contentReader");
            }

            // reset... 
            ErrorInLoading = null;
 
            m_CachedMetadata = null; 

            using (XmlTextReader xmlReader = new XmlTextReader(contentReader)) 
            {
                if (m_MetadataType == MetadataType.Unknown)
                {
                    // If we don't know the metedata type, we try to sniff it... 
                    MetadataType fileType = DetermineFileType(xmlReader);
 
                    // try 
                    m_CachedMetadata = LoadMetadataContent(fileType, xmlReader);
                    if (m_CachedMetadata.MetadataFormatError == null) 
                    {
                        m_MetadataType = fileType;
                    }
                } 
            }
        } 
 
        /// 
        ///  the function is called when the metadata is removed, and we need clean up the content 
        /// 
        /// 
        internal void CleanUpContent()
        { 
            ErrorInLoading = null;
            m_BinaryContent = new byte[] {}; 
 
            m_CachedMetadata = null;
        } 

        /// 
        /// Load schema/wsdl model from binary content.  -- Parse the metadata content
        ///  
        /// 
        ///  
        private MetadataContent LoadMetadataContent(MetadataType fileType) 
        {
            if (ErrorInLoading != null) 
            {
                return new MetadataContent(ErrorInLoading);
            }
            using (XmlTextReader xmlReader = new XmlTextReader(new StreamReader(new MemoryStream(m_BinaryContent)))) 
            {
                return LoadMetadataContent(fileType, xmlReader); 
            } 
        }
 
        /// 
        /// Load schema/wsdl model from text reader.  -- it will parse the metadata content.
        /// 
        ///  
        /// 
        private MetadataContent LoadMetadataContent(MetadataType fileType, XmlTextReader xmlReader) 
        { 
            MetadataContent cachedMetadata = new MetadataContent();
 
            try
            {
                switch (fileType)
                { 
                    case MetadataType.Disco:
                        cachedMetadata = new MetadataContent(Discovery.DiscoveryDocument.Read(xmlReader)); 
                        break; 
                    case MetadataType.Wsdl:
                        cachedMetadata = new MetadataContent(Description.ServiceDescription.Read(xmlReader)); 
                        cachedMetadata.MetadataServiceDescription.RetrievalUrl = GetMetadataSourceUrl();
                        break;
                    case MetadataType.Schema:
                        cachedMetadata = new MetadataContent(XmlSchema.Read(xmlReader, null)); 
                        cachedMetadata.MetadataXmlSchema.SourceUri = GetMetadataSourceUrl();
                        break; 
                    case MetadataType.Unknown: 
                        // For unknown types, we don't do nothing...
                        break; 
                    default:
                        Debug.Assert(fileType == MetadataType.Xml || fileType == MetadataType.Policy || fileType == MetadataType.Edmx);
                        XmlDocument tempDoc = new XmlDocument();
                        tempDoc.Load(xmlReader); 
                        cachedMetadata = new MetadataContent(tempDoc);
                        break; 
                } 
            }
            catch (Exception ex) 
            {
                cachedMetadata = new MetadataContent(ex);
            }
 
            return cachedMetadata;
        } 
 
        /// 
        /// convert metadata file to MetadataSection (to feed code/proxy generator) 
        ///  We don't reuse the buffered object model, because the generator could modify & corrupt them.
        /// 
        /// 
        internal MetadataSection CreateMetadataSection() 
        {
            MetadataContent metadata = LoadMetadataContent(m_MetadataType); 
            if (metadata.MetadataFormatError != null) 
            {
                throw metadata.MetadataFormatError; 
            }

            MetadataSection metadataSection = null;
 
            switch (FileType)
            { 
                case MetadataType.Unknown: 
                    break;
                case MetadataType.Disco: 
                    if (metadata.MetadataServiceDescription != null)
                    {
                        metadataSection = MetadataSection.CreateFromServiceDescription(metadata.MetadataServiceDescription);
                    } 
                    break;
                case MetadataType.Wsdl: 
                    // We need to make a copy of the WSDL object model since the act of importing it actuall 
                    // modifies it, and we don't want the cached instance to be polluted...
                    System.Web.Services.Description.ServiceDescription description = metadata.MetadataServiceDescription; 
                    if (description != null)
                    {
                        metadataSection = MetadataSection.CreateFromServiceDescription(description);
                    } 
                    break;
                case MetadataType.Schema: 
                    if (metadata.MetadataXmlSchema != null) 
                    {
                        metadataSection = MetadataSection.CreateFromSchema(metadata.MetadataXmlSchema); 
                    }
                    break;
                case MetadataFile.MetadataType.Policy:
                    if (metadata.MetadataXmlDocument != null) 
                    {
                        metadataSection = MetadataSection.CreateFromPolicy(metadata.MetadataXmlDocument.DocumentElement, null); 
                    } 
                    break;
                case MetadataFile.MetadataType.Xml: 
                case MetadataFile.MetadataType.Edmx:
                    if (metadata.MetadataXmlDocument != null)
                    {
                        metadataSection = new MetadataSection(null, null, metadata.MetadataXmlDocument.DocumentElement); 
                    }
                    break; 
                default: 
                    System.Diagnostics.Debug.Fail("Unknown Type?");
                    break; 
            }
            return metadataSection;
        }
 
        /// 
        /// Metadata source Url is used in error messages 
        ///  
        /// 
        internal string GetMetadataSourceUrl() 
        {
            if (String.IsNullOrEmpty(SourceUrl))
            {
                return FileName; 
            }
            else 
            { 
                return SourceUrl;
            } 
        }

        /// 
        /// Metadata File Type Enum 
        /// 
        ///  
        public enum MetadataType 
        {
            [XmlSerialization.XmlEnum(Name = "Unknown")] 
            Unknown = 0,
            [XmlSerialization.XmlEnum(Name = "Disco")]
            Disco = 1,
            [XmlSerialization.XmlEnum(Name = "Wsdl")] 
            Wsdl = 2,
            [XmlSerialization.XmlEnum(Name = "Schema")] 
            Schema = 3, 
            [XmlSerialization.XmlEnum(Name = "Policy")]
            Policy = 4, 
            [XmlSerialization.XmlEnum(Name = "Xml")]
            Xml = 5,
            [XmlSerialization.XmlEnum(Name = "Edmx")]
            Edmx = 6, 
        }
 
        ///  
        /// Metadata contained inside the file. Only one of field is valid, which depends on the MetadataType
        ///  
        /// 
        private class MetadataContent {

            private Discovery.DiscoveryDocument m_MetadataDiscoveryDocument; 
            private Description.ServiceDescription m_MetadataServiceDescription;
            private XmlSchema m_MetadataXmlSchema; 
            private XmlDocument m_MetadataXmlDocument; 

            private Exception m_MetadataFormatError; 

            private string m_TargetNamespace;

            internal MetadataContent() { 
                m_TargetNamespace = String.Empty;
            } 
 
            internal MetadataContent(Discovery.DiscoveryDocument discoveryDocument) {
                m_MetadataDiscoveryDocument = discoveryDocument; 
                m_TargetNamespace = String.Empty;
            }

            internal MetadataContent(Description.ServiceDescription serviceDescription) { 
                m_MetadataServiceDescription = serviceDescription;
                m_TargetNamespace = serviceDescription.TargetNamespace; 
            } 

            internal MetadataContent(XmlSchema schema) { 
                m_MetadataXmlSchema = schema;
                m_TargetNamespace = schema.TargetNamespace;
            }
 
            internal MetadataContent(XmlDocument document) {
                m_MetadataXmlDocument = document; 
                m_TargetNamespace = String.Empty; 
            }
 
            internal MetadataContent(Exception metadataFormatError) {
                m_MetadataFormatError = metadataFormatError;
            }
 
            /// 
            /// Retrieves the content of a discovery file 
            ///  
            /// 
            ///  
            public Discovery.DiscoveryDocument MetadataDiscoveryDocument
            {
                get
                { 
                    return m_MetadataDiscoveryDocument;
                } 
            } 

            ///  
            /// Error message if
            /// 
            /// 
            ///  
            public Exception MetadataFormatError
            { 
                get 
                {
                    return m_MetadataFormatError; 
                }
            }

            ///  
            /// Retrieves the content of a WSDL file
            ///  
            ///  
            /// 
            public Description.ServiceDescription MetadataServiceDescription 
            {
                get
                {
                    return m_MetadataServiceDescription; 
                }
            } 
 
            /// 
            /// Retrieves the content of a schema file 
            /// 
            /// 
            /// 
            public XmlSchema MetadataXmlSchema 
            {
                get 
                { 
                    return m_MetadataXmlSchema;
                } 
            }

            /// 
            /// Retrieves the content of an Xml file 
            /// 
            ///  
            ///  
            public XmlDocument MetadataXmlDocument
            { 
                get
                {
                    return m_MetadataXmlDocument;
                } 
            }
 
            ///  
            /// Retrieves the TargetNamespace when it is a schema item or a WSDL item
            ///  
            /// 
            /// 
            public string TargetNamespace
            { 
                get
                { 
                    return m_TargetNamespace; 
                }
            } 

        }
    }
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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