ReachObjectContext.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Print / Reach / Serialization / manager / ReachObjectContext.cs / 1 / ReachObjectContext.cs
                        
                        
                            /*++ 

    Copyright (C) 2004- 2005 Microsoft Corporation
    All rights reserved.
 
    Module Name:
        ReachObjectContext.cs 
 
    Abstract:
        This file contains the implementation representing 
        the context of a Serializable object. This woudl include
        information about the object itself and all the properties
        contained within that object
 
    Author:
        [....] ([....]) 1-December-2004 
 
    Revision History:
--*/ 
using System;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel; 
using System.Diagnostics;
using System.Reflection; 
using System.Xml; 
using System.IO;
using System.Security; 
using System.Security.Permissions;
using System.ComponentModel.Design.Serialization;
using System.Windows.Xps.Packaging;
using System.Windows.Documents; 
using System.Windows.Media;
using System.Windows.Markup; 
 
namespace System.Windows.Xps.Serialization
{ 
    internal class SerializableObjectContext :
                   BasicContext
    {
        #region Constructor 

        static 
        SerializableObjectContext( 
            )
        { 
            _recycableSerializableObjectContexts = new Stack();
        }

 
        /// 
        /// Instantiates an ObjectContext 
        ///  
        /// 
        /// The name of type of the object. 
        /// 
        /// 
        /// The perfix (namespace) of the type of the object.
        ///  
        /// 
        /// The instance of the object which contained this object as 
        /// one of its properties. 
        /// 
        ///  
        /// The property from which this object was driven to serialization.
        /// 
        public
        SerializableObjectContext( 
            string name,
            string prefix, 
            object target, 
            SerializablePropertyContext serializablePropertyContext
            ) : 
        base(name, prefix)
        {
            //
            // Validate Input Arguments 
            //
            if (target == null) 
            { 
                throw new ArgumentNullException("target");
            } 

            _targetObject            = target;
            _isComplexValue          = false;
            _backingPropertyContext  = serializablePropertyContext; 
        }
 
 
        /// 
        ///     Instantiates an ObjectContext 
        /// 
        /// 
        /// The instance of the object which contained this object as
        /// one of its properties. 
        /// 
        ///  
        /// The property from which this object was driven to serialization. 
        /// 
        public 
        SerializableObjectContext(
            object                      target,
            SerializablePropertyContext serializablePropertyContext
            ) 
        {
            Initialize(target, serializablePropertyContext); 
        } 

        #endregion Constructor 

        #region Internal Methods

        ///  
        /// Factory method to create ObjectContexts
        ///  
        ///  
        /// The manager controllig the serialization process.
        ///  
        /// 
        /// The instance of the object which contained this object as
        /// one of its properties.
        ///  
        /// 
        /// The ObjectContext of the parent object of this object. 
        ///  
        /// 
        /// The property from which this object was driven to serialization. 
        /// 
        /// 
        /// Critical -  Access the SerializationManager GraphContextStack which is a
        /// ContextStack which is link critical 
        ///
        /// TreatAsSafe -  The context stack is used local to the function. 
        ///                All access to the GraphContextStack is marked security critical 
        /// 
        [SecurityCritical, SecurityTreatAsSafe] 
        internal
        static
        SerializableObjectContext
        CreateContext( 
            PackageSerializationManager   serializationManager,
            object                      serializableObject, 
            SerializableObjectContext   serializableObjectParentContext, 
            SerializablePropertyContext serializablePropertyContext
            ) 
        {
            //
            // Check for element pre-existance to avoid infinite loops
            // in the process of serialization 
            //
            int stackIndex = 0; 
 
            object currentObject = null;
 
            for(currentObject = serializationManager.GraphContextStack[stackIndex];
                currentObject != null;
                currentObject = serializationManager.GraphContextStack[++stackIndex])
            { 
                SerializableObjectContext currentObjectContext = currentObject as SerializableObjectContext;
 
                if(currentObjectContext!=null && 
                   currentObjectContext.TargetObject == serializableObject)
                { 
                    throw new XpsSerializationException(ReachSR.Get(ReachSRID.ReachSerialization_CycleDetectedInSerialization));
                }
            }
 
            SerializableObjectContext serializableObjectContext =
            _recycableSerializableObjectContexts.Count == 0 ? 
            null : 
            (SerializableObjectContext)_recycableSerializableObjectContexts.Pop();
 
            if(serializableObjectContext == null)
            {
                serializableObjectContext = new SerializableObjectContext(serializableObject,
                                                                          serializablePropertyContext); 
            }
            else 
            { 
                serializableObjectContext.Initialize(serializableObject,
                                                     serializablePropertyContext); 
            }

            {
                // 
                // Namespace related creation within the context
                // 
                MetroSerializationNamespaceTable parentNamespaceTable = 
                serializableObjectParentContext != null ? serializableObjectParentContext.NamespaceTable : null;
 
                if (serializableObjectContext.NamespaceTable == null)
                {
                    serializableObjectContext.NamespaceTable = new MetroSerializationNamespaceTable(parentNamespaceTable);
                } 
            }
 
            { 
                //
                // Properties related creation within the context 
                //
                if(serializableObjectContext.PropertiesCollection == null)
                {
                    serializableObjectContext.PropertiesCollection = new  SerializablePropertyCollection(serializationManager, 
                                                                                                         serializableObject);
                } 
                else 
                {
                    serializableObjectContext.PropertiesCollection.Initialize(serializationManager, 
                                                                              serializableObject);
                }
            }
 
            serializableObjectContext.Name = serializableObjectContext.TargetObject.GetType().Name;
 
            return serializableObjectContext; 
        }
 
        /// 
        /// To optimize, we build a cache of created contexts
        /// and recycle them instead of desposing them.
        ///  
        /// 
        /// Context to recycle. 
        ///  
        internal
        static 
        void
        RecycleContext(
            SerializableObjectContext   serializableObjectContext
            ) 
        {
            serializableObjectContext.Clear(); 
            _recycableSerializableObjectContexts.Push(serializableObjectContext); 
        }
 
        #endregion Internal Methods


        #region Public Properties 

        ///  
        /// Query target object 
        /// 
        public 
        object
        TargetObject
        {
            get 
            {
                return _targetObject; 
            } 
        }
 
        /// 
        /// Query/Set namespace informaiton table
        /// 
        public 
        MetroSerializationNamespaceTable
        NamespaceTable 
        { 
            get
            { 
                return _namespaceTable;
            }

            set 
            {
                _namespaceTable = value; 
            } 
        }
 

        /// 
        /// Query/Set the collection containing all
        /// the properties of the current object 
        /// 
        public 
        SerializablePropertyCollection 
        PropertiesCollection
        { 
            get
            {
                return _propertiesCollection;
            } 
            set
            { 
                _propertiesCollection = value; 
            }
        } 

        /// 
        /// Query/Set the type of the property / object being
        /// considered for serialization. 
        /// 
        public 
        bool 
        IsComplexValue
        { 
            get
            {
                return _isComplexValue;
            } 

            set 
            { 
                _isComplexValue = value;
            } 
        }


        ///  
        /// Query / Set the readability type of the object
        ///  
        public 
        bool
        IsReadOnlyValue 
        {
            get
            {
                return _isReadOnlyValue; 
            }
 
            set 
            {
                _isReadOnlyValue = value; 
            }
        }

        #endregion Public Properties 

        #region Public Methods 
 

        ///  
        /// Initialize the context
        /// 
        public
        void 
        Initialize(
            object                      target, 
            SerializablePropertyContext serializablePropertyContext 
            )
        { 
            Initialize();
            _targetObject           = target;
            _isComplexValue         = false;
            _backingPropertyContext = serializablePropertyContext; 

            if(_backingPropertyContext!=null) 
            { 
                _isComplexValue  = _backingPropertyContext.IsComplex;
                _isReadOnlyValue = _backingPropertyContext.IsReadOnly; 
            }
            else
            {
                _isComplexValue  = true; 
                _isReadOnlyValue = false;
            } 
        } 

        ///  
        /// Clear the Context
        /// 
        public
        override 
        void
        Clear() 
        { 
            _targetObject    = null;
            _isComplexValue  = false; 
            _isReadOnlyValue = false;
            _namespaceTable  = null;

            if (_propertiesCollection != null) 
            {
                _propertiesCollection.Clear(); 
            } 

            base.Clear(); 
        }

        #endregion Public Methods
 
        #region Private Data
 
        private 
        object                               _targetObject;
        private 
        MetroSerializationNamespaceTable     _namespaceTable;
        private
        SerializablePropertyCollection       _propertiesCollection;
        private 
        bool                                 _isComplexValue;
        private 
        bool                                 _isReadOnlyValue; 
        private
        SerializablePropertyContext          _backingPropertyContext; 
        static
        Stack                                _recycableSerializableObjectContexts;

        #endregion Private Data 
    };
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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