XmlObjectSerializerContext.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / Serialization / System / Runtime / Serialization / XmlObjectSerializerContext.cs / 1305376 / XmlObjectSerializerContext.cs
                        
                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.Runtime.Serialization 
{
    using System; 
    using System.Collections.Generic; 
    using System.Reflection;
    using System.Security; 
    using System.Xml;
    using DataContractDictionary = System.Collections.Generic.Dictionary;

#if USE_REFEMIT 
    public class XmlObjectSerializerContext
#else 
    internal class XmlObjectSerializerContext 
#endif
    { 
        protected XmlObjectSerializer serializer;
        protected DataContract rootTypeDataContract;
        internal ScopedKnownTypes scopedKnownTypes = new ScopedKnownTypes();
        protected DataContractDictionary serializerKnownDataContracts; 
        bool isSerializerKnownDataContractsSetExplicit;
        protected IList serializerKnownTypeList; 
 
        [Fx.Tag.SecurityNote(Critical = "We base the decision whether to Demand SerializationFormatterPermission on this value.")]
        [SecurityCritical] 
        bool demandedSerializationFormatterPermission;

        [Fx.Tag.SecurityNote(Critical = "We base the decision whether to Demand MemberAccess on this value.")]
        [SecurityCritical] 
        bool demandedMemberAccessPermission;
        int itemCount; 
        int maxItemsInObjectGraph; 
        StreamingContext streamingContext;
        bool ignoreExtensionDataObject; 
        DataContractResolver dataContractResolver;
        KnownTypeDataContractResolver knownTypeResolver;

        internal XmlObjectSerializerContext(XmlObjectSerializer serializer, int maxItemsInObjectGraph, StreamingContext streamingContext, bool ignoreExtensionDataObject, DataContractResolver dataContractResolver) 
        {
            this.serializer = serializer; 
            this.itemCount = 1; 
            this.maxItemsInObjectGraph = maxItemsInObjectGraph;
            this.streamingContext = streamingContext; 
            this.ignoreExtensionDataObject = ignoreExtensionDataObject;
            this.dataContractResolver = dataContractResolver;
        }
 
        internal XmlObjectSerializerContext(XmlObjectSerializer serializer, int maxItemsInObjectGraph, StreamingContext streamingContext, bool ignoreExtensionDataObject)
            : this(serializer, maxItemsInObjectGraph, streamingContext, ignoreExtensionDataObject, null) 
        { 
        }
 
        internal XmlObjectSerializerContext(DataContractSerializer serializer, DataContract rootTypeDataContract, DataContractResolver dataContractResolver)
            : this(serializer,
            serializer.MaxItemsInObjectGraph,
            new StreamingContext(StreamingContextStates.All), 
            serializer.IgnoreExtensionDataObject,
            dataContractResolver) 
        { 
            this.rootTypeDataContract = rootTypeDataContract;
            this.serializerKnownTypeList = serializer.knownTypeList; 
        }

        internal XmlObjectSerializerContext(NetDataContractSerializer serializer)
            : this(serializer, 
            serializer.MaxItemsInObjectGraph,
            serializer.Context, 
            serializer.IgnoreExtensionDataObject) 
        {
        } 

        internal virtual SerializationMode Mode
        {
            get { return SerializationMode.SharedContract; } 
        }
 
        internal virtual bool IsGetOnlyCollection 
        {
            get { return false; } 
            set {  }
        }

        [Fx.Tag.SecurityNote(Critical = "Demands SerializationFormatter permission. demanding the right permission is critical.", 
            Safe = "No data or control leaks in or out, must be callable from transparent generated IL.")]
        [SecuritySafeCritical] 
        public void DemandSerializationFormatterPermission() 
        {
            if (!demandedSerializationFormatterPermission) 
            {
                Globals.SerializationFormatterPermission.Demand();
                demandedSerializationFormatterPermission = true;
            } 
        }
 
        [Fx.Tag.SecurityNote(Critical = "Demands MemberAccess permission. demanding the right permission is critical.", 
            Safe = "No data or control leaks in or out, must be callable from transparent generated IL.")]
        [SecuritySafeCritical] 
        public void DemandMemberAccessPermission()
        {
            if (!demandedMemberAccessPermission)
            { 
                Globals.MemberAccessPermission.Demand();
                demandedMemberAccessPermission = true; 
            } 
        }
 
        public StreamingContext GetStreamingContext()
        {
            return streamingContext;
        } 

        static MethodInfo incrementItemCountMethod; 
        internal static MethodInfo IncrementItemCountMethod 
        {
            get 
            {
                if (incrementItemCountMethod == null)
                    incrementItemCountMethod = typeof(XmlObjectSerializerContext).GetMethod("IncrementItemCount", Globals.ScanAllMembers);
                return incrementItemCountMethod; 
            }
        } 
        public void IncrementItemCount(int count) 
        {
            if (count > maxItemsInObjectGraph - itemCount) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.ExceededMaxItemsQuota, maxItemsInObjectGraph)));
            itemCount += count;
        }
 
        internal int RemainingItemCount
        { 
            get { return maxItemsInObjectGraph - itemCount; } 
        }
 
        internal bool IgnoreExtensionDataObject
        {
            get { return ignoreExtensionDataObject; }
        } 

        protected DataContractResolver DataContractResolver 
        { 
            get { return dataContractResolver; }
        } 

        protected KnownTypeDataContractResolver KnownTypeResolver
        {
            get 
            {
                if (knownTypeResolver == null) 
                { 
                    knownTypeResolver = new KnownTypeDataContractResolver(this);
                } 
                return knownTypeResolver;
            }
        }
 
        internal DataContract GetDataContract(Type type)
        { 
            return GetDataContract(type.TypeHandle, type); 
        }
 
        internal virtual DataContract GetDataContract(RuntimeTypeHandle typeHandle, Type type)
        {
            if (IsGetOnlyCollection)
            { 
                return DataContract.GetGetOnlyCollectionDataContract(DataContract.GetId(typeHandle), typeHandle, type, Mode);
            } 
            else 
            {
                return DataContract.GetDataContract(typeHandle, type, Mode); 
            }
        }

        internal virtual DataContract GetDataContractSkipValidation(int typeId, RuntimeTypeHandle typeHandle, Type type) 
        {
            if (IsGetOnlyCollection) 
            { 
                return DataContract.GetGetOnlyCollectionDataContractSkipValidation(typeId, typeHandle, type);
            } 
            else
            {
                return DataContract.GetDataContractSkipValidation(typeId, typeHandle, type);
            } 
        }
 
 
        internal virtual DataContract GetDataContract(int id, RuntimeTypeHandle typeHandle)
        { 
            if (IsGetOnlyCollection)
            {
                return DataContract.GetGetOnlyCollectionDataContract(id, typeHandle, null /*type*/, Mode);
            } 
            else
            { 
                return DataContract.GetDataContract(id, typeHandle, Mode); 
            }
        } 

        internal virtual void CheckIfTypeSerializable(Type memberType, bool isMemberTypeSerializable)
        {
            if (!isMemberTypeSerializable) 
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataContractException(SR.GetString(SR.TypeNotSerializable, memberType)));
        } 
 
        internal virtual Type GetSurrogatedType(Type type)
        { 
            return type;
        }

        DataContractDictionary SerializerKnownDataContracts 
        {
            get 
            { 
                // This field must be initialized during construction by serializers using data contracts.
                if (!this.isSerializerKnownDataContractsSetExplicit) 
                {
                    this.serializerKnownDataContracts = serializer.KnownDataContracts;
                    this.isSerializerKnownDataContractsSetExplicit = true;
                } 
                return this.serializerKnownDataContracts;
            } 
        } 

        DataContract GetDataContractFromSerializerKnownTypes(XmlQualifiedName qname) 
        {
            DataContractDictionary serializerKnownDataContracts = this.SerializerKnownDataContracts;
            if (serializerKnownDataContracts == null)
                return null; 
            DataContract outDataContract;
            return serializerKnownDataContracts.TryGetValue(qname, out outDataContract) ? outDataContract : null; 
        } 

        internal static DataContractDictionary GetDataContractsForKnownTypes(IList knownTypeList) 
        {
            if (knownTypeList == null) return null;
            DataContractDictionary dataContracts = new DataContractDictionary();
            Dictionary typesChecked = new Dictionary(); 
            for (int i = 0; i < knownTypeList.Count; i++)
            { 
                Type knownType = knownTypeList[i]; 
                if (knownType == null)
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.NullKnownType, "knownTypes"))); 

                DataContract.CheckAndAdd(knownType, typesChecked, ref dataContracts);
            }
            return dataContracts; 
        }
 
        internal bool IsKnownType(DataContract dataContract, DataContractDictionary knownDataContracts, Type declaredType) 
        {
            bool knownTypesAddedInCurrentScope = false; 
            if (knownDataContracts != null)
            {
                scopedKnownTypes.Push(knownDataContracts);
                knownTypesAddedInCurrentScope = true; 
            }
 
            bool isKnownType = IsKnownType(dataContract, declaredType); 

            if (knownTypesAddedInCurrentScope) 
            {
                scopedKnownTypes.Pop();
            }
            return isKnownType; 
        }
 
        internal bool IsKnownType(DataContract dataContract, Type declaredType) 
        {
            DataContract knownContract = ResolveDataContractFromKnownTypes(dataContract.StableName.Name, dataContract.StableName.Namespace, null /*memberTypeContract*/, declaredType); 
            return knownContract != null && knownContract.UnderlyingType == dataContract.UnderlyingType;
        }

        DataContract ResolveDataContractFromKnownTypes(XmlQualifiedName typeName) 
        {
            DataContract dataContract = PrimitiveDataContract.GetPrimitiveDataContract(typeName.Name, typeName.Namespace); 
            if (dataContract == null) 
            {
                if (typeName.Name == Globals.SafeSerializationManagerName && typeName.Namespace == Globals.SafeSerializationManagerNamespace && Globals.TypeOfSafeSerializationManager != null) 
                {
                    return GetDataContract(Globals.TypeOfSafeSerializationManager);
                }
                dataContract = scopedKnownTypes.GetDataContract(typeName); 
                if (dataContract == null)
                { 
                    dataContract = GetDataContractFromSerializerKnownTypes(typeName); 
                }
            } 
            return dataContract;
        }

        DataContract ResolveDataContractFromDataContractResolver(XmlQualifiedName typeName, Type declaredType) 
        {
            Type dataContractType = DataContractResolver.ResolveName(typeName.Name, typeName.Namespace, declaredType, KnownTypeResolver); 
            if (dataContractType == null) 
            {
                return null; 
            }
            else
            {
                return GetDataContract(dataContractType); 
            }
        } 
 
        internal Type ResolveNameFromKnownTypes(XmlQualifiedName typeName) {
            DataContract dataContract = ResolveDataContractFromKnownTypes(typeName); 
            if (dataContract == null)
            {
                return null;
            } 
            else
            { 
                return dataContract.OriginalUnderlyingType; 
            }
        } 

        protected DataContract ResolveDataContractFromKnownTypes(string typeName, string typeNs, DataContract memberTypeContract, Type declaredType)
        {
            XmlQualifiedName qname = new XmlQualifiedName(typeName, typeNs); 
            DataContract dataContract;
            if (DataContractResolver == null) 
            { 
                dataContract = ResolveDataContractFromKnownTypes(qname);
            } 
            else
            {
                dataContract = ResolveDataContractFromDataContractResolver(qname, declaredType);
            } 
            if (dataContract == null)
            { 
                if (memberTypeContract != null 
                    && !memberTypeContract.UnderlyingType.IsInterface
                    && memberTypeContract.StableName == qname) 
                {
                    dataContract = memberTypeContract;
                }
                if (dataContract == null && rootTypeDataContract != null) 
                {
                    if (rootTypeDataContract.StableName == qname) 
                        dataContract = rootTypeDataContract; 
                    else
                    { 
                        CollectionDataContract collectionContract = rootTypeDataContract as CollectionDataContract;
                        while (collectionContract != null)
                        {
                            DataContract itemContract = GetDataContract(GetSurrogatedType(collectionContract.ItemType)); 
                            if (itemContract.StableName == qname)
                            { 
                                dataContract = itemContract; 
                                break;
                            } 
                            collectionContract = itemContract as CollectionDataContract;
                        }
                    }
                } 
            }
            return dataContract; 
        } 

    } 

}

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

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