StructuredTypeEmitter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntityDesign / Design / System / Data / EntityModel / Emitters / StructuredTypeEmitter.cs / 1305376 / StructuredTypeEmitter.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 
using System;
using System.Collections; 
using System.Collections.Generic;
using System.CodeDom;
using System.Data;
using System.Data.EntityModel.SchemaObjectModel; 
using Som = System.Data.EntityModel.SchemaObjectModel;
using System.Data.Entity.Design; 
using System.Data.Metadata.Edm; 
using System.Diagnostics;
using System.Reflection; 
using System.Data.Objects.DataClasses;
using System.Data.Entity.Design.Common;
using System.Data.Entity.Design.SsdlGenerator;
 

namespace System.Data.EntityModel.Emitters 
{ 
    /// 
    /// Summary description for StructuredTypeEmitter. 
    /// 
    internal abstract class StructuredTypeEmitter : SchemaTypeEmitter
    {
        #region Public Methods 
        private bool _usingStandardBaseClass = true;
 
 

        ///  
        ///
        /// 
        /// 
        public override CodeTypeDeclarationCollection EmitApiClass() 
        {
            Validate(); // emitter-specific validation 
 
            CodeTypeReference baseType = this.GetBaseType();
 
            // raise the TypeGenerated event
            TypeGeneratedEventArgs eventArgs = new TypeGeneratedEventArgs(Item, baseType);
            this.Generator.RaiseTypeGeneratedEvent(eventArgs);
 
            // public [abstract] partial class ClassName
            CodeTypeDeclaration typeDecl = new CodeTypeDeclaration(Item.Name); 
            typeDecl.IsPartial = true; 
            typeDecl.TypeAttributes = System.Reflection.TypeAttributes.Class;
            if (Item.Abstract) 
            {
                typeDecl.TypeAttributes |= System.Reflection.TypeAttributes.Abstract;
            }
 
            SetTypeVisibility(typeDecl);
 
            EmitTypeAttributes(Item.Name, typeDecl, eventArgs.AdditionalAttributes); 

            // : baseclass 
            AssignBaseType(typeDecl, baseType, eventArgs.BaseType);

            AddInterfaces(Item.Name, typeDecl, eventArgs.AdditionalInterfaces);
 
            CommentEmitter.EmitSummaryComments(Item, typeDecl.Comments);
 
            // Since abstract types cannot be instantiated, skip the factory method for abstract types 
            if ( (typeDecl.TypeAttributes & System.Reflection.TypeAttributes.Abstract) == 0)
                EmitFactoryMethod(typeDecl); 

            EmitProperties(typeDecl);

            // additional members, if provided by the event subscriber 
            this.AddMembers(Item.Name, typeDecl, eventArgs.AdditionalMembers);
 
            CodeTypeDeclarationCollection typeDecls = new CodeTypeDeclarationCollection(); 
            typeDecls.Add(typeDecl);
            return typeDecls; 
        }

        #endregion
 
        #region Protected Methods
 
        ///  
        ///
        ///  
        /// 
        protected virtual CodeTypeReference GetBaseType()
        {
            if (Item.BaseType == null) 
                return null;
 
            return Generator.GetLeastPossibleQualifiedTypeReference(Item.BaseType); 
        }
 
        /// 
        ///
        /// 
        ///  
        /// 
        protected StructuredTypeEmitter(ClientApiGenerator generator, StructuralType structuralType) 
            : base(generator, structuralType) 
        {
        } 

        /// 
        ///
        ///  
        /// 
        protected override void EmitTypeAttributes(CodeTypeDeclaration typeDecl) 
        { 
            Generator.AttributeEmitter.EmitTypeAttributes(this, typeDecl);
            base.EmitTypeAttributes(typeDecl); 
        }

        /// 
        /// 
        /// 
        ///  
        protected virtual void EmitProperties(CodeTypeDeclaration typeDecl) 
        {
 
            foreach (EdmProperty property in Item.GetDeclaredOnlyMembers())
            {
                PropertyEmitter propertyEmitter = new PropertyEmitter(Generator, property, _usingStandardBaseClass);
                propertyEmitter.Emit(typeDecl); 
            }
        } 
 
        protected abstract ReadOnlyMetadataCollection GetProperties();
 
        /// 
        /// Emit static factory method which creates an instance of the class and initializes
        /// non-nullable properties (taken as arguments)
        ///  
        /// 
        protected virtual void EmitFactoryMethod(CodeTypeDeclaration typeDecl) 
        { 

 
            // build list of non-nullable properties
            ReadOnlyMetadataCollection properties = GetProperties();
            List parameters = new List(properties.Count);
            foreach (EdmProperty property in properties) 
            {
                bool include = IncludeFieldInFactoryMethod(property); 
                if (include) 
                {
                    parameters.Add(property); 
                }
            }

            // if there are no parameters, we don't emit anything (1 is for the null element) 
            // nor do we emit everything if this is the Ref propertied ctor and the parameter list is the same as the many parametered ctor
            if (parameters.Count < 1) 
            { 
                return;
            } 

            CodeMemberMethod method = new CodeMemberMethod();
            Generator.AttributeEmitter.EmitGeneratedCodeAttribute(method);
 
            CodeTypeReference typeRef = TypeReference.FromString(Item.Name);
            UniqueIdentifierService uniqueIdentifierService = new UniqueIdentifierService(Generator.IsLanguageCaseSensitive, name => Utils.FixParameterName(name)); 
            string instanceName = uniqueIdentifierService.AdjustIdentifier(Item.Name); 

            // public static Class CreateClass(...) 
            method.Attributes = MemberAttributes.Static|MemberAttributes.Public;
            method.Name = "Create" + Item.Name;
            if (NavigationPropertyEmitter.IsNameAlreadyAMemberName(Item, method.Name, Generator.LanguageAppropriateStringComparer))
            { 
                Generator.AddError(Strings.GeneratedFactoryMethodNameConflict(method.Name, Item.Name),
                    ModelBuilderErrorCode.GeneratedFactoryMethodNameConflict, 
                    EdmSchemaErrorSeverity.Error, Item.FullName); 
            }
 
            method.ReturnType = typeRef;

            // output method summary comments
            CommentEmitter.EmitSummaryComments(Strings.FactoryMethodSummaryComment(Item.Name), method.Comments); 

 
            // Class class = new Class(); 
            CodeVariableDeclarationStatement createNewInstance = new CodeVariableDeclarationStatement(
                typeRef, instanceName, new CodeObjectCreateExpression(typeRef)); 
            method.Statements.Add(createNewInstance);
            CodeVariableReferenceExpression instanceRef = new CodeVariableReferenceExpression(instanceName);

            // iterate over the properties figuring out which need included in the factory method 
            foreach (EdmProperty property in parameters)
            { 
                // CreateClass( ... , propType propName ...) 
                PropertyEmitter propertyEmitter = new PropertyEmitter(Generator, property, UsingStandardBaseClass);
                CodeTypeReference propertyTypeReference = propertyEmitter.PropertyType; 
                String parameterName = uniqueIdentifierService.AdjustIdentifier(propertyEmitter.PropertyName);
                CodeParameterDeclarationExpression paramDecl = new CodeParameterDeclarationExpression(
                    propertyTypeReference, parameterName);
                CodeArgumentReferenceExpression paramRef = new CodeArgumentReferenceExpression(paramDecl.Name); 
                method.Parameters.Add(paramDecl);
 
                // add comment describing the parameter 
                CommentEmitter.EmitParamComments(paramDecl, Strings.FactoryParamCommentGeneral(propertyEmitter.PropertyName), method.Comments);
 
                CodeExpression newPropertyValue;
                if (MetadataUtil.IsComplexType(propertyEmitter.Item.TypeUsage.EdmType))
                {
                    List complexVerifyParameters = new List(); 
                    complexVerifyParameters.Add(paramRef);
                    complexVerifyParameters.Add(new CodePrimitiveExpression(propertyEmitter.PropertyName)); 
 
                    newPropertyValue =
                        new CodeMethodInvokeExpression( 
                            PropertyEmitter.CreateEdmStructuralObjectRef(TypeReference),
                            Utils.VerifyComplexObjectIsNotNullName,
                            complexVerifyParameters.ToArray());
                } 
                else
                { 
                    newPropertyValue = paramRef; 
                }
 
                // Scalar property:
                //     Property = param;
                // Complex property:
                //     Property = StructuralObject.VerifyComplexObjectIsNotNull(param, propertyName); 

                method.Statements.Add(new CodeAssignStatement(new CodePropertyReferenceExpression(instanceRef, propertyEmitter.PropertyName), newPropertyValue)); 
            } 

            // return class; 
            method.Statements.Add(new CodeMethodReturnStatement(instanceRef));

            // actually add the method to the class
            typeDecl.Members.Add(method); 
        }
 
 
        #endregion
 
        #region Protected Properties

        internal new StructuralType Item
        { 
            get
            { 
                return base.Item as StructuralType; 
            }
        } 

        protected bool UsingStandardBaseClass
        {
            get { return _usingStandardBaseClass; } 
        }
 
        #endregion 

        #region Private Methods 

        /// 
        ///
        ///  
        /// 
        ///  
        private bool IncludeFieldInFactoryMethod(EdmProperty property) 
        {
            if (property.Nullable) 
            {
                return false;
            }
 
            if (PropertyEmitter.HasDefault(property))
            { 
                return false; 
            }
 
            if ((PropertyEmitter.GetGetterAccessibility(property) != MemberAttributes.Public &&
                PropertyEmitter.GetSetterAccessibility(property) != MemberAttributes.Public) ||
                // declared in a sub type, but not setter accessbile from this type
                (Item != property.DeclaringType && PropertyEmitter.GetSetterAccessibility(property) == MemberAttributes.Private) 
               )
            { 
                return false; 
            }
 
            return true;
        }

        private void AssignBaseType(CodeTypeDeclaration typeDecl, 
                                    CodeTypeReference baseType,
                                    CodeTypeReference eventReturnedBaseType) 
        { 
            if (eventReturnedBaseType != null && !eventReturnedBaseType.Equals(baseType))
            { 
                _usingStandardBaseClass = false;
                typeDecl.BaseTypes.Add(eventReturnedBaseType);
            }
            else 
            {
                if (baseType != null) 
                { 
                    typeDecl.BaseTypes.Add(baseType);
                } 
            }
        }
        #endregion
    } 
}

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

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