MetadataArtifactLoaderResource.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / ndp / fx / src / DataEntity / System / Data / Metadata / MetadataArtifactLoaderResource.cs / 2 / MetadataArtifactLoaderResource.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
//--------------------------------------------------------------------- 
 
using System.Collections.Generic;
using System.Collections; 
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
using System.Text; 
using System.Xml;
using System.Data.Mapping; 
using System.IO; 
using System.Security;
using System.Security.Permissions; 
using System.Security.Cryptography;
using System.Data.EntityModel.SchemaObjectModel;

 
namespace System.Data.Metadata.Edm
{ 
    ///  
    /// This class represents one resource item to be loaded from an assembly.
    ///  
    internal class MetadataArtifactLoaderResource : MetadataArtifactLoader, IComparable
    {
        private readonly bool _alreadyLoaded = false;
        private readonly Assembly _assembly; 
        private readonly string _resourceName;
 
        ///  
        /// Constructor - loads the resource stream
        ///  
        /// The path to the resource to load
        /// The global registry of URIs
        internal MetadataArtifactLoaderResource(Assembly assembly, string resourceName, ICollection uriRegistry)
        { 
            Debug.Assert(assembly != null);
            Debug.Assert(resourceName != null); 
 
            _assembly = assembly;
            _resourceName = resourceName; 

            string tempPath = MetadataArtifactLoaderCompositeResource.CreateResPath(_assembly, _resourceName);
            _alreadyLoaded = uriRegistry.Contains(tempPath);
            if (!_alreadyLoaded) 
            {
                uriRegistry.Add(tempPath); 
 
                // '_alreadyLoaded' is not set because while we would like to prevent
                // other instances of MetadataArtifactLoaderFile that wrap the same 
                // _path from being added to the list of paths/readers, we do want to
                // include this particular instance.
            }
        } 

        public override string Path 
        { 
            get
            { 
                return MetadataArtifactLoaderCompositeResource.CreateResPath(_assembly, _resourceName);
            }
        }
 
        /// 
        /// Implementation of IComparable.CompareTo() 
        ///  
        /// The object to compare to
        /// 0 if the loaders are "equal" (i.e., have the same _path value) 
        public int CompareTo(object obj)
        {
            MetadataArtifactLoaderResource loader = obj as MetadataArtifactLoaderResource;
            if (loader != null) 
            {
                return string.Compare(Path, loader.Path, StringComparison.OrdinalIgnoreCase); 
            } 

            Debug.Assert(false, "object is not a MetadataArtifactLoaderResource"); 
            return -1;
        }

        ///  
        /// Equals() returns true if the objects have the same _path value
        ///  
        /// The object to compare to 
        /// true if the objects have the same _path value
        public override bool Equals(object obj) 
        {
            return this.CompareTo(obj) == 0;
        }
 
        /// 
        /// GetHashCode override that defers the result to the _path member variable. 
        ///  
        /// 
        public override int GetHashCode() 
        {
            return Path.GetHashCode();
        }
 
        public override void CollectFilePermissionPaths(List paths, DataSpace spaceToGet)
        { 
            // does not apply 
        }
 
        /// 
        /// Get paths to artifacts for a specific DataSpace.
        /// 
        /// The DataSpace for the artifacts of interest 
        /// A List of strings identifying paths to all artifacts for a specific DataSpace
        public override List GetPaths(DataSpace spaceToGet) 
        { 
            List list = new List();
            if (!_alreadyLoaded && MetadataArtifactLoader.IsArtifactOfDataSpace(Path, spaceToGet)) 
            {
                list.Add(Path);
            }
            return list; 
        }
 
        ///  
        /// Get paths to all artifacts
        ///  
        /// A List of strings identifying paths to all resources
        public override List GetPaths()
        {
            List list = new List(); 
            if (!_alreadyLoaded)
            { 
                list.Add(Path); 
            }
            return list; 
        }

        /// 
        /// Create and return an XmlReader around the resource represented by this instance. 
        /// 
        /// A List of XmlReaders for all resources 
        public override List GetReaders(Dictionary sourceDictionary) 
        {
            List list = new List(); 
            if (!_alreadyLoaded)
            {

                XmlReader reader = CreateReader(); 
                list.Add(reader);
 
                if (sourceDictionary != null) 
                {
                    sourceDictionary.Add(this, reader); 
                }
            }
            return list;
        } 

        private XmlReader CreateReader() 
        { 

            Stream stream = LoadResource(); 

            XmlReaderSettings readerSettings = Schema.CreateEdmStandardXmlReaderSettings();
            // close the stream when the xmlreader is closed
            // now the reader owns the stream 
            readerSettings.CloseInput = true;
 
            // we know that we aren't reading a fragment 
            readerSettings.ConformanceLevel = ConformanceLevel.Document;
            XmlReader reader = XmlReader.Create(stream, readerSettings); 
            // cannot set the base URI because res:// URIs cause the schema parser
            // to choke

            return reader; 
        }
 
        ///  
        /// Create and return an XmlReader around the resource represented by this instance
        /// if it is of the requested DataSpace type. 
        /// 
        /// The DataSpace corresponding to the requested artifacts
        /// A List of XmlReader objects
        public override List CreateReaders(DataSpace spaceToGet) 
        {
            List list = new List(); 
            if (!_alreadyLoaded) 
            {
                if (MetadataArtifactLoader.IsArtifactOfDataSpace(Path, spaceToGet)) 
                {
                    XmlReader reader = CreateReader();
                    list.Add(reader);
                } 
            }
            return list; 
        } 

        ///  
        /// This method parses the path to the resource and attempts to load it.
        /// The method also accounts for the wildcard assembly name.
        /// 
        private Stream LoadResource() 
        {
            Stream resourceStream; 
            if (TryCreateResourceStream(out resourceStream)) 
            {
                return resourceStream; 
            }
            throw EntityUtil.Metadata(System.Data.Entity.Strings.UnableToLoadResource);
        }
 
        private bool TryCreateResourceStream(out Stream resourceStream)
        { 
            resourceStream = _assembly.GetManifestResourceStream(_resourceName); 
            return resourceStream != null;
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
//--------------------------------------------------------------------- 
 
using System.Collections.Generic;
using System.Collections; 
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
using System.Text; 
using System.Xml;
using System.Data.Mapping; 
using System.IO; 
using System.Security;
using System.Security.Permissions; 
using System.Security.Cryptography;
using System.Data.EntityModel.SchemaObjectModel;

 
namespace System.Data.Metadata.Edm
{ 
    ///  
    /// This class represents one resource item to be loaded from an assembly.
    ///  
    internal class MetadataArtifactLoaderResource : MetadataArtifactLoader, IComparable
    {
        private readonly bool _alreadyLoaded = false;
        private readonly Assembly _assembly; 
        private readonly string _resourceName;
 
        ///  
        /// Constructor - loads the resource stream
        ///  
        /// The path to the resource to load
        /// The global registry of URIs
        internal MetadataArtifactLoaderResource(Assembly assembly, string resourceName, ICollection uriRegistry)
        { 
            Debug.Assert(assembly != null);
            Debug.Assert(resourceName != null); 
 
            _assembly = assembly;
            _resourceName = resourceName; 

            string tempPath = MetadataArtifactLoaderCompositeResource.CreateResPath(_assembly, _resourceName);
            _alreadyLoaded = uriRegistry.Contains(tempPath);
            if (!_alreadyLoaded) 
            {
                uriRegistry.Add(tempPath); 
 
                // '_alreadyLoaded' is not set because while we would like to prevent
                // other instances of MetadataArtifactLoaderFile that wrap the same 
                // _path from being added to the list of paths/readers, we do want to
                // include this particular instance.
            }
        } 

        public override string Path 
        { 
            get
            { 
                return MetadataArtifactLoaderCompositeResource.CreateResPath(_assembly, _resourceName);
            }
        }
 
        /// 
        /// Implementation of IComparable.CompareTo() 
        ///  
        /// The object to compare to
        /// 0 if the loaders are "equal" (i.e., have the same _path value) 
        public int CompareTo(object obj)
        {
            MetadataArtifactLoaderResource loader = obj as MetadataArtifactLoaderResource;
            if (loader != null) 
            {
                return string.Compare(Path, loader.Path, StringComparison.OrdinalIgnoreCase); 
            } 

            Debug.Assert(false, "object is not a MetadataArtifactLoaderResource"); 
            return -1;
        }

        ///  
        /// Equals() returns true if the objects have the same _path value
        ///  
        /// The object to compare to 
        /// true if the objects have the same _path value
        public override bool Equals(object obj) 
        {
            return this.CompareTo(obj) == 0;
        }
 
        /// 
        /// GetHashCode override that defers the result to the _path member variable. 
        ///  
        /// 
        public override int GetHashCode() 
        {
            return Path.GetHashCode();
        }
 
        public override void CollectFilePermissionPaths(List paths, DataSpace spaceToGet)
        { 
            // does not apply 
        }
 
        /// 
        /// Get paths to artifacts for a specific DataSpace.
        /// 
        /// The DataSpace for the artifacts of interest 
        /// A List of strings identifying paths to all artifacts for a specific DataSpace
        public override List GetPaths(DataSpace spaceToGet) 
        { 
            List list = new List();
            if (!_alreadyLoaded && MetadataArtifactLoader.IsArtifactOfDataSpace(Path, spaceToGet)) 
            {
                list.Add(Path);
            }
            return list; 
        }
 
        ///  
        /// Get paths to all artifacts
        ///  
        /// A List of strings identifying paths to all resources
        public override List GetPaths()
        {
            List list = new List(); 
            if (!_alreadyLoaded)
            { 
                list.Add(Path); 
            }
            return list; 
        }

        /// 
        /// Create and return an XmlReader around the resource represented by this instance. 
        /// 
        /// A List of XmlReaders for all resources 
        public override List GetReaders(Dictionary sourceDictionary) 
        {
            List list = new List(); 
            if (!_alreadyLoaded)
            {

                XmlReader reader = CreateReader(); 
                list.Add(reader);
 
                if (sourceDictionary != null) 
                {
                    sourceDictionary.Add(this, reader); 
                }
            }
            return list;
        } 

        private XmlReader CreateReader() 
        { 

            Stream stream = LoadResource(); 

            XmlReaderSettings readerSettings = Schema.CreateEdmStandardXmlReaderSettings();
            // close the stream when the xmlreader is closed
            // now the reader owns the stream 
            readerSettings.CloseInput = true;
 
            // we know that we aren't reading a fragment 
            readerSettings.ConformanceLevel = ConformanceLevel.Document;
            XmlReader reader = XmlReader.Create(stream, readerSettings); 
            // cannot set the base URI because res:// URIs cause the schema parser
            // to choke

            return reader; 
        }
 
        ///  
        /// Create and return an XmlReader around the resource represented by this instance
        /// if it is of the requested DataSpace type. 
        /// 
        /// The DataSpace corresponding to the requested artifacts
        /// A List of XmlReader objects
        public override List CreateReaders(DataSpace spaceToGet) 
        {
            List list = new List(); 
            if (!_alreadyLoaded) 
            {
                if (MetadataArtifactLoader.IsArtifactOfDataSpace(Path, spaceToGet)) 
                {
                    XmlReader reader = CreateReader();
                    list.Add(reader);
                } 
            }
            return list; 
        } 

        ///  
        /// This method parses the path to the resource and attempts to load it.
        /// The method also accounts for the wildcard assembly name.
        /// 
        private Stream LoadResource() 
        {
            Stream resourceStream; 
            if (TryCreateResourceStream(out resourceStream)) 
            {
                return resourceStream; 
            }
            throw EntityUtil.Metadata(System.Data.Entity.Strings.UnableToLoadResource);
        }
 
        private bool TryCreateResourceStream(out Stream resourceStream)
        { 
            resourceStream = _assembly.GetManifestResourceStream(_resourceName); 
            return resourceStream != null;
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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