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//---------------------------------------------------------------------
// <copyright file="NamespaceEmitter.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner [....]
// @backupOwner [....]
//---------------------------------------------------------------------
using System;
using System.CodeDom;
using System.Data;
using Som = System.Data.EntityModel.SchemaObjectModel;
using System.Collections.Generic;
using System.Data.Entity.Design;
using System.Data.Metadata.Edm;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Data.Entity.Design.SsdlGenerator;
using System.Data.Entity.Design.Common;
namespace System.Data.EntityModel.Emitters
{
/// <summary>
/// This class is responsible for Emitting the code to create the CLR namespace container and assembly level attributes
/// </summary>
internal sealed class NamespaceEmitter : Emitter
{
#region Static Fields
private static Pair<Type, CreateEmitter>[] EmitterCreators = new Pair<Type, CreateEmitter>[]
{
new Pair<Type,CreateEmitter>(typeof(EntityType), delegate (ClientApiGenerator generator, GlobalItem element) { return new EntityTypeEmitter(generator,(EntityType)element); }),
new Pair<Type,CreateEmitter>(typeof(ComplexType), delegate (ClientApiGenerator generator, GlobalItem element) { return new ComplexTypeEmitter(generator,(ComplexType)element); }),
new Pair<Type,CreateEmitter>(typeof(EntityContainer), delegate (ClientApiGenerator generator, GlobalItem element) { return new EntityContainerEmitter(generator,(EntityContainer)element); }),
new Pair<Type,CreateEmitter>(typeof(AssociationType), delegate (ClientApiGenerator generator, GlobalItem element) { return new AssociationTypeEmitter(generator,(AssociationType)element); }),
};
#endregion
#region Private Fields
private string _codeNamespace = null;
private string _targetFilePath = null;
#endregion
#region Public Methods
/// <summary>
///
/// </summary>
/// <param name="generator"></param>
public NamespaceEmitter(ClientApiGenerator generator, string codeNamespace, string targetFilePath)
: base(generator)
{
_codeNamespace = codeNamespace;
_targetFilePath = targetFilePath != null ? targetFilePath : string.Empty;
}
/// <summary>
/// Creates the CodeTypeDeclarations necessary to generate the code
/// </summary>
public void Emit()
{
// it is a valid scenario for namespaceName to be empty
string namespaceName = Generator.SourceObjectNamespaceName;
// emit the namespace definition
CodeNamespace codeNamespace = new CodeNamespace( namespaceName );
// output some boiler plate comments
string comments = Strings.NamespaceComments(
System.IO.Path.GetFileName( _targetFilePath ),
DateTime.Now.ToString( System.Globalization.CultureInfo.CurrentCulture ));
CommentEmitter.EmitComments( CommentEmitter.GetFormattedLines( comments, false ), codeNamespace.Comments, false );
CompileUnit.Namespaces.Add( codeNamespace );
// Add the assembly attribute.
CodeAttributeDeclaration assemblyAttribute;
// SQLBUDT 505339: VB compiler fails if multiple assembly attributes exist in the same project.
// This adds a GUID to the assembly attribute so that each generated file will have a unique EdmSchemaAttribute in VB.
if (this.Generator.Language == System.Data.Entity.Design.LanguageOption.GenerateVBCode) //The GUID is only added in VB
{
assemblyAttribute = AttributeEmitter.EmitSimpleAttribute("System.Data.Objects.DataClasses.EdmSchemaAttribute", System.Guid.NewGuid().ToString());
}
else
{
assemblyAttribute = AttributeEmitter.EmitSimpleAttribute("System.Data.Objects.DataClasses.EdmSchemaAttribute");
}
CompileUnit.AssemblyCustomAttributes.Add(assemblyAttribute);
Dictionary<string, string> usedClassName = new Dictionary<string, string>(StringComparer.Ordinal);
// Emit the classes in the schema
foreach (GlobalItem element in Generator.GetSourceTypes())
{
Debug.Assert(!(element is EdmFunction), "Are you trying to emit functions now? If so add an emitter for it.");
if (AddElementNameToCache(element, usedClassName))
{
SchemaTypeEmitter emitter = CreateElementEmitter(element);
CodeTypeDeclarationCollection typeDeclaration = emitter.EmitApiClass();
if (typeDeclaration.Count > 0)
{
codeNamespace.Types.AddRange(typeDeclaration);
}
}
}
}
#endregion
#region Private Properties
/// <summary>
/// Gets the compile unit (top level codedom object)
/// </summary>
/// <value></value>
private CodeCompileUnit CompileUnit
{
get
{
return Generator.CompileUnit;
}
}
#endregion
private bool AddElementNameToCache(GlobalItem element, Dictionary<string, string> cache)
{
if (element.BuiltInTypeKind == BuiltInTypeKind.EntityContainer)
{
return TryAddNameToCache((element as EntityContainer).Name, element.BuiltInTypeKind.ToString(), cache);
}
else if (element.BuiltInTypeKind == BuiltInTypeKind.EntityType ||
element.BuiltInTypeKind == BuiltInTypeKind.ComplexType ||
element.BuiltInTypeKind == BuiltInTypeKind.AssociationType)
{
return TryAddNameToCache((element as StructuralType).Name, element.BuiltInTypeKind.ToString(), cache);
}
return true;
}
private bool TryAddNameToCache(string name, string type, Dictionary<string, string> cache)
{
if (!cache.ContainsKey(name))
{
cache.Add(name, type);
}
else
{
this.Generator.AddError(Strings.DuplicateClassName(type, name, cache[name]), ModelBuilderErrorCode.DuplicateClassName,
EdmSchemaErrorSeverity.Error, name);
return false;
}
return true;
}
/// <summary>
/// Create an Emitter for a schema type element
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
private SchemaTypeEmitter CreateElementEmitter( GlobalItem element )
{
Type typeOfElement = element.GetType();
foreach ( Pair<Type, CreateEmitter> pair in EmitterCreators )
{
if ( pair.First.IsAssignableFrom( typeOfElement ) )
return pair.Second( Generator, element );
}
return null;
}
private delegate SchemaTypeEmitter CreateEmitter( ClientApiGenerator generator, GlobalItem item );
/// <summary>
/// Reponsible for relating two objects together into a pair
/// </summary>
/// <typeparam name="T1"></typeparam>
/// <typeparam name="T2"></typeparam>
private class Pair<T1, T2>
{
public T1 First;
public T2 Second;
internal Pair( T1 first, T2 second )
{
First = first;
Second = second;
}
}
}
}
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