NamespaceEmitter.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntityDesign / Design / System / Data / EntityModel / Emitters / NamespaceEmitter.cs / 1305376 / NamespaceEmitter.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @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 
{
    ///  
    /// This class is responsible for Emitting the code to create the CLR namespace container and assembly level attributes 
    /// 
    internal sealed class NamespaceEmitter : Emitter 
    {
        #region Static Fields
        private static Pair[] EmitterCreators = new Pair[]
        { 
            new Pair(typeof(EntityType), delegate (ClientApiGenerator generator, GlobalItem element) { return new EntityTypeEmitter(generator,(EntityType)element); }),
            new Pair(typeof(ComplexType), delegate (ClientApiGenerator generator, GlobalItem element) { return new ComplexTypeEmitter(generator,(ComplexType)element); }), 
            new Pair(typeof(EntityContainer), delegate (ClientApiGenerator generator, GlobalItem element) { return new EntityContainerEmitter(generator,(EntityContainer)element); }), 
            new Pair(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 
        /// 
        ///
        /// 
        ///  
        public NamespaceEmitter(ClientApiGenerator generator, string codeNamespace, string targetFilePath)
            : base(generator) 
        { 
            _codeNamespace = codeNamespace;
            _targetFilePath = targetFilePath != null ? targetFilePath : string.Empty; 
        }

        /// 
        /// Creates the CodeTypeDeclarations necessary to generate the code 
        /// 
        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 usedClassName = new Dictionary(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
        /// 
        /// Gets the compile unit (top level codedom object) 
        /// 
        ///  
        private CodeCompileUnit CompileUnit 
        {
            get 
            {
                return Generator.CompileUnit;
            }
        } 
        #endregion
 
        private bool AddElementNameToCache(GlobalItem element, Dictionary 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 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; 
        }
 
        /// 
        /// Create an Emitter for a schema type element
        /// 
        ///  
        /// 
        private SchemaTypeEmitter CreateElementEmitter( GlobalItem element ) 
        { 
            Type typeOfElement = element.GetType();
            foreach ( Pair pair in EmitterCreators ) 
            {
                if ( pair.First.IsAssignableFrom( typeOfElement ) )
                    return pair.Second( Generator, element );
            } 
            return null;
        } 
 
        private delegate SchemaTypeEmitter CreateEmitter( ClientApiGenerator generator, GlobalItem item );
 
        /// 
        /// Reponsible for relating two objects together into a pair
        /// 
        ///  
        /// 
        private class Pair 
        { 
            public T1 First;
            public T2 Second; 
            internal Pair( T1 first, T2 second )
            {
                First = first;
                Second = second; 
            }
        } 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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NamespaceEmitter.cs source code in C# .NET

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