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//---------------------------------------------------------------------
// <copyright file="EntityDesignerBuildProvider.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner [....]
// @backupOwner [....]
//---------------------------------------------------------------------
using System.Collections.Generic;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Globalization;
using System.IO;
using System.Text;
using System.Web.Hosting;
using System.Web.Compilation;
using System.Xml;
using System.Data.Metadata.Edm;
namespace System.Data.Entity.Design.AspNet
{
/// <summary>
/// The ASP .NET Build provider for the CSDL in ADO .NET
/// </summary>
///
[BuildProviderAppliesTo(BuildProviderAppliesTo.Code)]
public class EntityDesignerBuildProvider : System.Web.Compilation.BuildProvider
{
/// <summary>
/// Default constructor
/// </summary>
public EntityDesignerBuildProvider()
{
}
/// <summary>
/// We want ASP .NET to always reset the app domain when we have to rebuild
/// </summary>
/// <param name="results"></param>
/// <returns></returns>
public override BuildProviderResultFlags GetResultFlags(CompilerResults results)
{
return BuildProviderResultFlags.ShutdownAppDomainOnChange;
}
/// <summary>
/// Extract the CSDL, SSDL and MSL nodes from the EDMX file and store them
/// as embedded resources
/// </summary>
/// <param name="assemblyBuilder"></param>
public override void GenerateCode(AssemblyBuilder assemblyBuilder)
{
using (StreamReader edmxInputStream = new StreamReader(VirtualPathProvider.OpenFile(base.VirtualPath)))
{
// load up an XML document representing the edmx file
XmlElement conceptualSchemaElement;
XmlElement mappingElement;
XmlElement storageSchemaElement;
string embedAsResourcePropertyValue;
EntityDesignerUtils.ExtractConceptualMappingAndStorageNodes(edmxInputStream, out conceptualSchemaElement, out mappingElement, out storageSchemaElement, out embedAsResourcePropertyValue);
if (null == conceptualSchemaElement)
{
throw new XmlException("No Conceptual Schema node to embed as a resource", null, 0, 0);
}
if (null == storageSchemaElement)
{
throw new XmlException("No Storage Schema node to embed as a resource", null, 0, 0);
}
if (null == mappingElement)
{
throw new XmlException("No Mapping node to embed as a resource", null, 0, 0);
}
// construct output paths where the CSDL/MSL/SSDL resources will be placed
string virtualPathPrefix = base.VirtualPath.Replace(EntityDesignerUtils._edmxFileExtension, String.Empty);
string csdlResourceName = BuildProviderUtils.GetResourceNameForVirtualPath(virtualPathPrefix + XmlConstants.CSpaceSchemaExtension);
string ssdlResourceName = BuildProviderUtils.GetResourceNameForVirtualPath(virtualPathPrefix + XmlConstants.SSpaceSchemaExtension);
string mslResourceName = BuildProviderUtils.GetResourceNameForVirtualPath(virtualPathPrefix + XmlConstants.CSSpaceSchemaExtension);
SetupEmbeddedResource(assemblyBuilder, this, conceptualSchemaElement, csdlResourceName);
SetupEmbeddedResource(assemblyBuilder, this, storageSchemaElement, ssdlResourceName);
SetupEmbeddedResource(assemblyBuilder, this, mappingElement, mslResourceName);
}
}
private static void SetupEmbeddedResource(AssemblyBuilder assemblyBuilder,
BuildProvider prov, XmlElement xmlElement, string resourceName)
{
using (Stream resStream = assemblyBuilder.CreateEmbeddedResource(prov, resourceName))
{
EntityDesignerUtils.OutputXmlElementToStream(xmlElement, resStream);
}
}
}
}
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