SerializationInfoEnumerator.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Runtime / Serialization / SerializationInfoEnumerator.cs / 1305376 / SerializationInfoEnumerator.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class: SerializationInfoEnumerator 
**
** 
** Purpose: A formatter-friendly mechanism for walking all of
** the data in a SerializationInfo.  Follows the IEnumerator
** mechanism from Collections.
** 
**
============================================================*/ 
namespace System.Runtime.Serialization { 
    using System;
    using System.Collections; 
    using System.Diagnostics.Contracts;

    //
    // The tuple returned by SerializationInfoEnumerator.Current. 
    //
[System.Runtime.InteropServices.ComVisible(true)] 
    public struct SerializationEntry { 
        private Type   m_type;
        private Object m_value; 
        private String m_name;

        public Object Value {
            get { 
                return m_value;
            } 
        } 

        public String Name { 
            get {
                return m_name;
            }
        } 

        public Type ObjectType { 
            get { 
                return m_type;
            } 
        }

        internal SerializationEntry(String entryName, Object entryValue, Type entryType) {
            m_value = entryValue; 
            m_name = entryName;
            m_type = entryType; 
        } 
    }
 
    //
    // A simple enumerator over the values stored in the SerializationInfo.
    // This does not snapshot the values, it just keeps pointers to the
    // member variables of the SerializationInfo that created it. 
    //
[System.Runtime.InteropServices.ComVisible(true)] 
    public sealed class SerializationInfoEnumerator : IEnumerator { 
        String[] m_members;
        Object[] m_data; 
        Type[]   m_types;
        int      m_numItems;
        int      m_currItem;
        bool     m_current; 

        internal SerializationInfoEnumerator(String[] members, Object[] info, Type[] types, int numItems) { 
            Contract.Assert(members!=null, "[SerializationInfoEnumerator.ctor]members!=null"); 
            Contract.Assert(info!=null, "[SerializationInfoEnumerator.ctor]info!=null");
            Contract.Assert(types!=null, "[SerializationInfoEnumerator.ctor]types!=null"); 
            Contract.Assert(numItems>=0, "[SerializationInfoEnumerator.ctor]numItems>=0");
            Contract.Assert(members.Length>=numItems, "[SerializationInfoEnumerator.ctor]members.Length>=numItems");
            Contract.Assert(info.Length>=numItems, "[SerializationInfoEnumerator.ctor]info.Length>=numItems");
            Contract.Assert(types.Length>=numItems, "[SerializationInfoEnumerator.ctor]types.Length>=numItems"); 

            m_members = members; 
            m_data = info; 
            m_types = types;
            //The MoveNext semantic is much easier if we enforce that [0..m_numItems] are valid entries 
            //in the enumerator, hence we subtract 1.
            m_numItems = numItems-1;
            m_currItem = -1;
            m_current = false; 
        }
 
        public bool MoveNext() { 
            if (m_currItem
        Object IEnumerator.Current { //Actually returns a SerializationEntry 
            get {
                if (m_current==false) {
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen"));
                } 
                return (Object)(new SerializationEntry(m_members[m_currItem], m_data[m_currItem], m_types[m_currItem]));
            } 
        } 

        public SerializationEntry Current { //Actually returns a SerializationEntry 
            get {
                if (m_current==false) {
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen"));
                } 
                return (new SerializationEntry(m_members[m_currItem], m_data[m_currItem], m_types[m_currItem]));
            } 
        } 

        public void Reset() { 
            m_currItem = -1;
            m_current = false;
        }
 
        public String Name {
            get { 
                if (m_current==false) { 
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen"));
                } 
                return m_members[m_currItem];
            }
        }
        public Object Value { 
            get {
                if (m_current==false) { 
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen")); 
                }
                return m_data[m_currItem]; 
            }
        }
        public Type ObjectType {
            get { 
                if (m_current==false) {
                    throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumOpCantHappen")); 
                } 
                return m_types[m_currItem];
            } 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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