Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntityDesign / Design / System / Data / EntityModel / Emitters / NavigationPropertyEmitter.cs / 1305376 / NavigationPropertyEmitter.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.CodeDom; using System.Data; using System.Collections.Generic; using System.Data.Entity.Design; using Som=System.Data.EntityModel.SchemaObjectModel; using System.Data.Metadata.Edm; using System.Diagnostics; using System.Data.Entity.Design.SsdlGenerator; using System.Data.Entity.Design.Common; namespace System.Data.EntityModel.Emitters { ////// Summary description for NavigationPropertyEmitter. /// internal sealed class NavigationPropertyEmitter : PropertyEmitterBase { private const string ValuePropertyName = "Value"; ////// /// /// /// public NavigationPropertyEmitter(ClientApiGenerator generator, NavigationProperty navigationProperty, bool declaringTypeUsesStandardBaseType) : base(generator, navigationProperty, declaringTypeUsesStandardBaseType) { } ////// Generate the navigation property /// /// The type to add the property to. protected override void EmitProperty(CodeTypeDeclaration typeDecl) { EmitNavigationProperty(typeDecl); } ////// Generate the navigation property specified /// /// The type to add the property to. private void EmitNavigationProperty( CodeTypeDeclaration typeDecl ) { // create a regular property CodeMemberProperty property = EmitNavigationProperty(Item.ToEndMember, false); typeDecl.Members.Add(property); if (Item.ToEndMember.RelationshipMultiplicity != RelationshipMultiplicity.Many) { // create a ref property property = EmitNavigationProperty(Item.ToEndMember, true); typeDecl.Members.Add(property); } } ////// Generate a navigation property /// /// the other end /// True to emit Reference navigation property ///the generated property private CodeMemberProperty EmitNavigationProperty(RelationshipEndMember target, bool referenceProperty) { CodeTypeReference typeRef = GetReturnType(target, referenceProperty); // raise the PropertyGenerated event PropertyGeneratedEventArgs eventArgs = new PropertyGeneratedEventArgs(Item, null, // no backing field typeRef); this.Generator.RaisePropertyGeneratedEvent(eventArgs); // [System.ComponentModel.Browsable(false)] // public TargetType TargetName // public EntityReferenceTargetName // or // public EntityCollection TargetNames CodeMemberProperty property = new CodeMemberProperty(); if (referenceProperty) { AttributeEmitter.AddBrowsableAttribute(property); Generator.AttributeEmitter.EmitGeneratedCodeAttribute(property); } else { Generator.AttributeEmitter.EmitNavigationPropertyAttributes(Generator, target, property, eventArgs.AdditionalAttributes); // Only reference navigation properties are currently currently supported with XML serialization // and thus we should use the XmlIgnore and SoapIgnore attributes on other property types. AttributeEmitter.AddIgnoreAttributes(property); } AttributeEmitter.AddDataMemberAttribute(property); CommentEmitter.EmitSummaryComments(Item, property.Comments); property.Name = Item.Name; if (referenceProperty) { property.Name += "Reference"; if (IsNameAlreadyAMemberName(Item.DeclaringType, property.Name, Generator.LanguageAppropriateStringComparer)) { Generator.AddError(Strings.GeneratedNavigationPropertyNameConflict(Item.Name, Item.DeclaringType.Name, property.Name), ModelBuilderErrorCode.GeneratedNavigationPropertyNameConflict, EdmSchemaErrorSeverity.Error, Item.DeclaringType.FullName, property.Name); } } if (eventArgs.ReturnType != null && !eventArgs.ReturnType.Equals(typeRef)) { property.Type = eventArgs.ReturnType; } else { property.Type = typeRef; } property.Attributes = MemberAttributes.Final; CodeMethodInvokeExpression getMethod = EmitGetMethod(target); CodeExpression getReturnExpression; property.Attributes |= AccessibilityFromGettersAndSetters(Item); // setup the accessibility of the navigation property setter and getter MemberAttributes propertyAccessibility = property.Attributes & MemberAttributes.AccessMask; PropertyEmitter.AddGetterSetterFixUp(Generator.FixUps, GetFullyQualifiedPropertyName(property.Name), PropertyEmitter.GetGetterAccessibility(Item), propertyAccessibility, true); PropertyEmitter.AddGetterSetterFixUp(Generator.FixUps, GetFullyQualifiedPropertyName(property.Name), PropertyEmitter.GetSetterAccessibility(Item), propertyAccessibility, false); if (target.RelationshipMultiplicity != RelationshipMultiplicity.Many) { // insert user-supplied Set code here, before the assignment // List additionalSetStatements = eventArgs.AdditionalSetStatements; if (additionalSetStatements != null && additionalSetStatements.Count > 0) { try { property.SetStatements.AddRange(additionalSetStatements.ToArray()); } catch (ArgumentNullException ex) { Generator.AddError(Strings.InvalidSetStatementSuppliedForProperty(Item.Name), ModelBuilderErrorCode.InvalidSetStatementSuppliedForProperty, EdmSchemaErrorSeverity.Error, ex); } } CodeExpression valueRef = new CodePropertySetValueReferenceExpression(); if(typeRef != eventArgs.ReturnType) { // we need to cast to the actual type valueRef = new CodeCastExpression(typeRef, valueRef); } if (referenceProperty) { // get // return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedReference ("CSpaceQualifiedRelationshipName", "TargetRoleName"); getReturnExpression = getMethod; // set // if (value != null) // { // ((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedReference "CSpaceQualifiedRelationshipName", "TargetRoleName", value); // } CodeMethodReferenceExpression initReferenceMethod = new CodeMethodReferenceExpression(); initReferenceMethod.MethodName = "InitializeRelatedReference"; initReferenceMethod.TypeArguments.Add(Generator.GetLeastPossibleQualifiedTypeReference(GetEntityType(target))); initReferenceMethod.TargetObject = new CodePropertyReferenceExpression( new CodeCastExpression(TypeReference.IEntityWithRelationshipsTypeBaseClass, ThisRef), "RelationshipManager"); // relationships aren't backed by types so we won't map the namespace // or we can't find the relationship again later string cspaceNamespaceNameQualifiedRelationshipName = target.DeclaringType.FullName; property.SetStatements.Add( new CodeConditionStatement( EmitExpressionDoesNotEqualNull(valueRef), new CodeExpressionStatement( new CodeMethodInvokeExpression( initReferenceMethod, new CodeExpression[] { new CodePrimitiveExpression(cspaceNamespaceNameQualifiedRelationshipName), new CodePrimitiveExpression(target.Name), valueRef})))); } else { CodePropertyReferenceExpression valueProperty = new CodePropertyReferenceExpression(getMethod, ValuePropertyName); // get // return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedReference ("CSpaceQualifiedRelationshipName", "TargetRoleName").Value; getReturnExpression = valueProperty; // set // ((IEntityWithRelationships)this).RelationshipManager.GetRelatedReference ("CSpaceQualifiedRelationshipName", "TargetRoleName").Value = value; property.SetStatements.Add( new CodeAssignStatement(valueProperty, valueRef)); } } else { // get // return ((IEntityWithRelationships)this).RelationshipManager.GetRelatedCollection ("CSpaceQualifiedRelationshipName", "TargetRoleName"); getReturnExpression = getMethod; // set // if (value != null) // { // ((IEntityWithRelationships)this).RelationshipManager.InitializeRelatedCollection "CSpaceQualifiedRelationshipName", "TargetRoleName", value); // } CodeExpression valueRef = new CodePropertySetValueReferenceExpression(); CodeMethodReferenceExpression initCollectionMethod = new CodeMethodReferenceExpression(); initCollectionMethod.MethodName = "InitializeRelatedCollection"; initCollectionMethod.TypeArguments.Add(Generator.GetLeastPossibleQualifiedTypeReference(GetEntityType(target))); initCollectionMethod.TargetObject = new CodePropertyReferenceExpression( new CodeCastExpression(TypeReference.IEntityWithRelationshipsTypeBaseClass, ThisRef), "RelationshipManager"); // relationships aren't backed by types so we won't map the namespace // or we can't find the relationship again later string cspaceNamespaceNameQualifiedRelationshipName = target.DeclaringType.FullName; property.SetStatements.Add( new CodeConditionStatement( EmitExpressionDoesNotEqualNull(valueRef), new CodeExpressionStatement( new CodeMethodInvokeExpression( initCollectionMethod, new CodeExpression[] { new CodePrimitiveExpression(cspaceNamespaceNameQualifiedRelationshipName), new CodePrimitiveExpression(target.Name), valueRef})))); } // if additional Get statements were specified by the event subscriber, insert them now // List additionalGetStatements = eventArgs.AdditionalGetStatements; if (additionalGetStatements != null && additionalGetStatements.Count > 0) { try { property.GetStatements.AddRange(additionalGetStatements.ToArray()); } catch (ArgumentNullException ex) { Generator.AddError(Strings.InvalidGetStatementSuppliedForProperty(Item.Name), ModelBuilderErrorCode.InvalidGetStatementSuppliedForProperty, EdmSchemaErrorSeverity.Error, ex); } } property.GetStatements.Add(new CodeMethodReturnStatement(getReturnExpression)); return property; } internal static bool IsNameAlreadyAMemberName(StructuralType type, string generatedPropertyName, StringComparison comparison) { foreach (EdmMember member in type.Members) { if (member.DeclaringType == type && member.Name.Equals(generatedPropertyName, comparison)) { return true; } } return false; } private string GetFullyQualifiedPropertyName(string propertyName) { return Item.DeclaringType.FullName + "." + propertyName; } /// /// Gives the SchemaElement back cast to the most /// appropriate type /// private new NavigationProperty Item { get { return base.Item as NavigationProperty; } } ////// Get the return type for the get method, given the target end /// /// /// true if the is the return type for a reference property ///the return type for a target private CodeTypeReference GetReturnType(RelationshipEndMember target, bool referenceMethod) { CodeTypeReference returnType = Generator.GetLeastPossibleQualifiedTypeReference(GetEntityType(target)); if (referenceMethod) { returnType = TypeReference.AdoFrameworkGenericDataClass("EntityReference", returnType); } else if (target.RelationshipMultiplicity == RelationshipMultiplicity.Many) { returnType = TypeReference.AdoFrameworkGenericDataClass("EntityCollection", returnType); } return returnType; } private static EntityTypeBase GetEntityType(RelationshipEndMember endMember) { Debug.Assert(endMember.TypeUsage.EdmType.BuiltInTypeKind == BuiltInTypeKind.RefType, "not a reference type"); EntityTypeBase type = ((RefType)endMember.TypeUsage.EdmType).ElementType; return type; } ////// Emit the GetRelatedCollection or GetRelatedReference methods /// /// Target end of the relationship ///Expression to invoke the appropriate method private CodeMethodInvokeExpression EmitGetMethod(RelationshipEndMember target) { // ((IEntityWithRelationships)this).RelationshipManager.GetRelatedReference("CSpaceQualifiedRelationshipName", "TargetRoleName"); // or // ((IEntityWithRelationships)this).RelationshipManager.GetRelatedCollection ("CSpaceQualifiedRelationshipName", "TargetRoleName"); CodeMethodReferenceExpression getMethod = new CodeMethodReferenceExpression(); if (target.RelationshipMultiplicity != RelationshipMultiplicity.Many) getMethod.MethodName = "GetRelatedReference"; else getMethod.MethodName = "GetRelatedCollection"; getMethod.TypeArguments.Add(Generator.GetLeastPossibleQualifiedTypeReference(GetEntityType(target))); getMethod.TargetObject = new CodePropertyReferenceExpression( new CodeCastExpression(TypeReference.IEntityWithRelationshipsTypeBaseClass, ThisRef), "RelationshipManager"); // relationships aren't backed by types so we won't map the namespace // or we can't find the relationship again later string cspaceNamespaceNameQualifiedRelationshipName = target.DeclaringType.FullName; return new CodeMethodInvokeExpression( getMethod, new CodeExpression[] { new CodePrimitiveExpression(cspaceNamespaceNameQualifiedRelationshipName), new CodePrimitiveExpression(target.Name)}); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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