NavigationPropertyEmitter.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntityDesign / Design / System / Data / EntityModel / Emitters / NavigationPropertyEmitter.cs / 1 / 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 EntityReference TargetName
            // or 
            // public EntityCollection TargetNames 
            CodeMemberProperty property = new CodeMemberProperty();
            if (referenceProperty) 
            {
                AttributeEmitter.AddBrowsableAttribute(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(TypeSemantics.IsReferenceType(endMember.TypeUsage), "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.
//---------------------------------------------------------------------- 
// 
//      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 EntityReference TargetName
            // or 
            // public EntityCollection TargetNames 
            CodeMemberProperty property = new CodeMemberProperty();
            if (referenceProperty) 
            {
                AttributeEmitter.AddBrowsableAttribute(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(TypeSemantics.IsReferenceType(endMember.TypeUsage), "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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