MetadataItemEmitter.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 / MetadataItemEmitter.cs / 1305376 / MetadataItemEmitter.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//---------------------------------------------------------------------using System; 
using System.Collections.Generic;
using System.Text; 
using System.Data.Metadata.Edm;
using System.Diagnostics;
using System.CodeDom;
using System.Reflection; 

namespace System.Data.EntityModel.Emitters 
{ 
    internal abstract class MetadataItemEmitter : Emitter
    { 
        private MetadataItem _item;

        protected MetadataItemEmitter(ClientApiGenerator generator, MetadataItem item)
            :base(generator) 
        {
            Debug.Assert(item != null, "item is null"); 
            _item = item; 
        }
 
        protected MetadataItem Item
        {
            get { return _item; }
        } 

        ///  
        /// Emitter-specific validation here 
        /// 
        protected abstract void Validate(); 

        #region Operations for Getting Accessibility

        private const string CodeGenerationValueAccessibilityInternal = "Internal"; 
        private const string CodeGenerationValueAccessibilityProtected = "Protected";
        private const string CodeGenerationValueAccessibilityPublic = "Public"; 
        private const string CodeGenerationValueAccessibilityPrivate = "Private"; 

        #region Protected Block 
        protected static MemberAttributes AccessibilityFromGettersAndSetters(EdmMember property)
        {
            MemberAttributes scope = MemberAttributes.Private;
 
            MemberAttributes getter = GetGetterAccessibility(property);
            if (IsLeftMoreAccessableThanRight(getter, scope)) 
            { 
                scope = getter;
            } 

            MemberAttributes setter = GetSetterAccessibility(property);
            if (IsLeftMoreAccessableThanRight(setter, scope))
            { 
                scope = setter;
            } 
            return scope; 
        }
 
        protected static MemberAttributes GetGetterAccessibility(EdmMember item)
        {
            return GetAccessibilityValue(item, XmlConstants.GetterAccess);
        } 

        protected static MemberAttributes GetSetterAccessibility(EdmMember item) 
        { 
            return GetAccessibilityValue(item, XmlConstants.SetterAccess);
        } 

        protected static MemberAttributes GetFunctionImportAccessibility(EdmFunction item)
        {
            return GetAccessibilityValue(item, XmlConstants.MethodAccess); 
        }
 
        protected static MemberAttributes GetEntitySetPropertyAccessibility(EntitySet item) 
        {
            return GetAccessibilityValue(item, XmlConstants.GetterAccess); 
        }
        protected static MemberAttributes GetEntityTypeAccessibility(EntityType item)
        {
            return GetAccessibilityValue(item, XmlConstants.TypeAccess); 
        }
 
        protected static int GetAccessibilityRank(MemberAttributes accessibility) 
        {
            Debug.Assert(accessibility == MemberAttributes.Private || 
                         accessibility == MemberAttributes.Public ||
                         accessibility == MemberAttributes.Assembly ||
                         accessibility == MemberAttributes.Family,
                         "this method is intended to deal with only single access attributes"); 
            switch (accessibility)
            { 
                case MemberAttributes.Public: 
                    return 0;
                case MemberAttributes.Assembly: 
                    return 1;
                case MemberAttributes.Family:
                    return 2;
                default: 
                    Debug.Assert(accessibility == MemberAttributes.Private, "did a new type get added?");
                    return 3; 
            } 
        }
 
        protected static TypeAttributes GetTypeAccessibilityValue(MetadataItem item)
        {
            TypeAttributes accessibilty = TypeAttributes.Public;
            MetadataProperty metadataProperty; 
            if (item.MetadataProperties.TryGetValue(Utils.GetFullyQualifiedCodeGenerationAttributeName(XmlConstants.TypeAccess), false, out metadataProperty))
            { 
                accessibilty = GetCodeAccessibilityTypeAttribute(metadataProperty.Value.ToString()); 
            }
            return accessibilty; 
        }
        #endregion Protected

        #region Private Block 
        private static MemberAttributes GetAccessibilityValue(MetadataItem item, string attribute)
        { 
            MemberAttributes accessibilty = MemberAttributes.Public; 
            MetadataProperty metadataProperty;
            if (item.MetadataProperties.TryGetValue(Utils.GetFullyQualifiedCodeGenerationAttributeName(attribute), false, out metadataProperty)) 
            {
                accessibilty = GetCodeAccessibilityMemberAttribute(metadataProperty.Value.ToString());
            }
            return accessibilty; 
        }
 
        private static MemberAttributes GetCodeAccessibilityMemberAttribute(string accessibility) 
        {
            Debug.Assert(accessibility != null, "why does accessibility == null?"); 

            switch (accessibility)
            {
                case CodeGenerationValueAccessibilityInternal: 
                    return MemberAttributes.Assembly;
                case CodeGenerationValueAccessibilityPrivate: 
                    return MemberAttributes.Private; 
                case CodeGenerationValueAccessibilityProtected:
                    return MemberAttributes.Family; 

                default:
                    Debug.Assert(accessibility == CodeGenerationValueAccessibilityPublic, "found an accessibility other than " + CodeGenerationValueAccessibilityPublic);
                    return MemberAttributes.Public; 
            }
        } 
 
        /// 
        /// Given a MemberAttribute, returns a string representation used in CSDL. 
        /// For e.g: MemebrAttribtue.Family is Protected in our csdl, (protected in C#, Family in VB)
        /// Inverse of the method above (GetCodeAccessibilityMemberAttribute)
        /// 
        protected static string GetAccessibilityCsdlStringFromMemberAttribute(MemberAttributes attribute) 
        {
            switch (attribute) 
            { 
                case MemberAttributes.Assembly:
                    return CodeGenerationValueAccessibilityInternal; 
                case MemberAttributes.Private:
                    return CodeGenerationValueAccessibilityPrivate;
                case MemberAttributes.Family:
                    return CodeGenerationValueAccessibilityProtected; 

                default: 
                    Debug.Assert(attribute == MemberAttributes.Public, "found MemberAttribute other than " + CodeGenerationValueAccessibilityPublic); 
                    return CodeGenerationValueAccessibilityPublic;
            } 
        }

        private static bool IsLeftMoreAccessableThanRight(MemberAttributes left, MemberAttributes right)
        { 
            return GetAccessibilityRank(left) < GetAccessibilityRank(right);
        } 
 
        private static TypeAttributes GetCodeAccessibilityTypeAttribute(string accessibility)
        { 
            Debug.Assert(accessibility != null, "why does accessibility == null?");
            if (accessibility == CodeGenerationValueAccessibilityInternal || accessibility == CodeGenerationValueAccessibilityProtected)
            {
                return TypeAttributes.NotPublic; 
            }
            else 
            { 
                Debug.Assert(accessibility == CodeGenerationValueAccessibilityPublic, "found an accessibility other than " + CodeGenerationValueAccessibilityPublic);
                return TypeAttributes.Public; 
            }
        }
        #endregion Private
 
        #endregion Operations for getting Accessibility
    } 
} 

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

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