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 / DataWeb / Design / system / Data / EntityModel / Emitters / StructuredTypeEmitter.cs / 1305376 / StructuredTypeEmitter.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System.CodeDom; 
using System.Collections.Generic;
using System.Data.Metadata.Edm;
using System.Data.Services.Design;
using System.Data.Services.Design.Common; 

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 (EdmMember member in Item.Members) 
            {
                EdmProperty property = (member as EdmProperty);
                if ((null != property) && (property.DeclaringType == Item))
                { 
                    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();
            CodeTypeReference typeRef = TypeReference.FromString(Item.Name); 
            UniqueIdentifierService uniqueIdentifierService = new UniqueIdentifierService(Generator.IsLanguageCaseSensitive);
            string instanceName = uniqueIdentifierService.AdjustIdentifier(Utils.CamelCase(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); 
            } 

            method.ReturnType = typeRef; 
            AttributeEmitter.AddGeneratedCodeAttribute(method);

            // 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(Utils.FixParameterName(propertyEmitter.PropertyName, "argument"));
                parameterName = Utils.SetSpecialCaseForFxCopOnPropertyName(parameterName);
                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 (TypeSemantics.IsComplexType(propertyEmitter.Item.TypeUsage))
                { 
                    List complexVerifyParameters = new List();
                    complexVerifyParameters.Add(paramRef); 
                    complexVerifyParameters.Add(new CodePrimitiveExpression(propertyEmitter.PropertyName)); 

                    // if (null == param) { throw new ArgumentNullException("PropertyName"); } 
                    method.Statements.Add(
                        new CodeConditionStatement(
                            EmitExpressionEqualsNull(paramRef),
                            new CodeThrowExceptionStatement( 
                                new CodeObjectCreateExpression(
                                    TypeReference.ForType(typeof(ArgumentNullException)), 
                                    new CodePrimitiveExpression(parameterName) 
                                )
                            ) 
                        )
                    );

                    newPropertyValue = paramRef; 
                }
                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)
            { 
                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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