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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections;
using System.Diagnostics;
namespace System.Runtime.Serialization
{
public struct SerializationEntry
{
private string _name;
private object _value;
private Type _type;
internal SerializationEntry(string entryName, object entryValue, Type entryType)
{
_name = entryName;
_value = entryValue;
_type = entryType;
}
public object Value => _value;
public string Name => _name;
public Type ObjectType => _type;
}
public sealed class SerializationInfoEnumerator : IEnumerator
{
private readonly string[] _members;
private readonly object[] _data;
private readonly Type[] _types;
private readonly int _numItems;
private int _currItem;
private bool _current;
internal SerializationInfoEnumerator(string[] members, object[] info, Type[] types, int numItems)
{
Debug.Assert(members != null, "[SerializationInfoEnumerator.ctor]members!=null");
Debug.Assert(info != null, "[SerializationInfoEnumerator.ctor]info!=null");
Debug.Assert(types != null, "[SerializationInfoEnumerator.ctor]types!=null");
Debug.Assert(numItems >= 0, "[SerializationInfoEnumerator.ctor]numItems>=0");
Debug.Assert(members.Length >= numItems, "[SerializationInfoEnumerator.ctor]members.Length>=numItems");
Debug.Assert(info.Length >= numItems, "[SerializationInfoEnumerator.ctor]info.Length>=numItems");
Debug.Assert(types.Length >= numItems, "[SerializationInfoEnumerator.ctor]types.Length>=numItems");
_members = members;
_data = info;
_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.
_numItems = numItems - 1;
_currItem = -1;
_current = false;
}
public bool MoveNext()
{
if (_currItem < _numItems)
{
_currItem++;
_current = true;
}
else
{
_current = false;
}
return _current;
}
object IEnumerator.Current => Current;
public SerializationEntry Current
{
get
{
if (_current == false)
{
throw new InvalidOperationException(SR.InvalidOperation_EnumOpCantHappen);
}
return new SerializationEntry(_members[_currItem], _data[_currItem], _types[_currItem]);
}
}
public void Reset()
{
_currItem = -1;
_current = false;
}
public string Name
{
get
{
if (_current == false)
{
throw new InvalidOperationException(SR.InvalidOperation_EnumOpCantHappen);
}
return _members[_currItem];
}
}
public object Value
{
get
{
if (_current == false)
{
throw new InvalidOperationException(SR.InvalidOperation_EnumOpCantHappen);
}
return _data[_currItem];
}
}
public Type ObjectType
{
get
{
if (_current == false)
{
throw new InvalidOperationException(SR.InvalidOperation_EnumOpCantHappen);
}
return _types[_currItem];
}
}
}
}
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