public PersistContext(object root, PersistContextStates context)
{
this._root = root;
this._context = context;
this._savecount = 0;
this._infoTypeCache = new Hashtable();
}
public PersistContext(object root, PersistContextStates context)
{
this._root = root;
this._context = context;
this._savecount = 0;
this._infoTypeCache = new Hashtable();
}
public PersistContext(object root, PersistContextStates context, int SaveCount)
{
_root = root;
_context = context;
_savecount = SaveCount;
_infoTypeCache = new Hashtable();
}
/// <summary>
/// Serializes a field on a object using PersistableAttribute attributes
/// </summary>
/// <param name="obj"></param>
/// <param name="fi"></param>
/// <param name="info"></param>
/// <param name="context"></param>
private static void SerializeValue(object obj, FieldInfo fi, SerializationInfo info, StreamingContext context)
{
try
{
PersistContext persistContext = (context.Context != null && context.Context is PersistContext)
? context.Context as PersistContext
: null;
PersistContextStates excludeContext = (persistContext != null)
? persistContext.Context
: PersistContextStates.ExcludeNormal;
object[] attrs = fi.GetCustomAttributes(typeof(PersistableAttribute), false);
if (attrs.Length != 0)
{
var pattr = attrs[0] as PersistableAttribute;
if (pattr.Flags == PersistType.None)
{
return;
}
if ((pattr.Context & excludeContext) != 0) // exclude context matches
{
return;
}
var indicies = new object[] {};
object value = fi.GetValue(obj);
try
{
info.AddValue(fi.Name, value);
if (pattr.Version != 0)
{
info.AddValue(string.Concat(fi.Name, ".Version"), pattr.Version);
}
}
catch (SerializationException)
{
// discard serialization exceptions as the same member may be added twice
}
}
else
{
try
{
info.AddValue(fi.Name, fi.GetValue(obj));
}
catch (SerializationException)
{
// discard serialization exceptions as the same member may be added twice
}
}
}
catch
{
}
}
/// <summary>
/// Deserializes a field on a object using PersistableAttribute attributes.
/// </summary>
/// <param name="obj">
/// </param>
/// <param name="fi">
/// </param>
/// <param name="info">
/// </param>
/// <param name="context">
/// </param>
private static void DeserializeValue(object obj, FieldInfo fi, SerializationInfo info, StreamingContext context)
{
try
{
PersistContext persistContext = (context.Context != null && context.Context is PersistContext) ? context.Context as PersistContext : null;
PersistContextStates excludeContext = (persistContext != null) ? persistContext.Context : PersistContextStates.ExcludeNormal;
int curVersion = 0;
bool canInit = false;
object[] attrs = fi.GetCustomAttributes(typeof(PersistableAttribute), false);
if (attrs.Length != 0)
{
var pattr = attrs[0] as PersistableAttribute;
if (pattr.Flags == PersistType.None)
{
return;
}
if ((pattr.Context & excludeContext) != 0)
{
// exclude context matches
return;
}
curVersion = pattr.Version;
canInit = (pattr.Flags & PersistType.Initializable) != 0;
}
int version = 0;
string name = fi.Name;
string ver = string.Concat(fi.Name, ".Version");
object value = null;
Type type = null;
// Use enum to avoid exceptions
SerializationInfoEnumerator siEnum = info.GetEnumerator();
while (siEnum.MoveNext())
{
if (siEnum.Name == ver)
{
version = (int)siEnum.Value;
}
if (siEnum.Name == name)
{
value = siEnum.Value;
type = siEnum.ObjectType;
}
}
if ((type == null) || ((version > 0) && (curVersion < version)))
{
if (canInit)
{
SetDefaultValue(obj, fi, false);
}
return;
}
fi.SetValue(obj, value);
}
catch
{
}
}
public PersistContext(object root, PersistContextStates context, int SaveCount)
{
_root = root;
_context = context;
_savecount = SaveCount;
_infoTypeCache = new Hashtable();
}
