/// <summary>
/// Deserialize a user type instance from a POF stream by reading its
/// state using the specified <see cref="IPofReader"/> object.
/// </summary>
/// <remarks>
/// An implementation of <b>IPofSerializer</b> is required to follow
/// the following steps in sequence for reading in an object of a
/// user type:
/// <list type="number">
/// <item>
/// <description>
/// If the object is evolvable, the implementation must get the
/// version by calling <see cref="IPofReader.VersionId"/>.
/// </description>
/// </item>
/// <item>
/// <description>
/// The implementation may read any combination of the
/// properties of the user type by using "read" methods of the
/// <b>IPofReader</b>, but it must do so in the order of the property
/// indexes. Additionally, the implementation must call
/// {@link IPofReader#RegisterIdentity} with the new instance prior
/// to reading any properties which are user type instances
/// themselves.
/// </description>
/// </item>
/// <item>
/// <description>
/// After all desired properties of the user type have been read,
/// the implementation must terminate the reading of the user type by
/// calling <see cref="IPofReader.ReadRemainder"/>.
/// </description>
/// </item>
/// </list>
/// </remarks>
/// <param name="pofReader">
/// The <b>IPofReader</b> with which to read the object's state.
/// </param>
/// <returns>
/// The deserialized user type instance.
/// </returns>
/// <exception cref="IOException">
/// If an I/O error occurs.
/// </exception>
public Object Deserialize(IPofReader pofReader)
{
try
{
IPortableObject po = (IPortableObject)
Activator.CreateInstance(GetTypeForTypeId(pofReader.PofContext, m_nTypeId));
CacheFactory.Log("Deserializing " + po.GetType(), CacheFactory.LogLevel.Max);
bool fEvolvable = po is IEvolvableObject;
IEvolvableObject et = fEvolvable ? (IEvolvableObject)po : null;
int typeId = ((PofStreamReader.UserTypeReader)pofReader).NextPropertyIndex;
while (typeId > 0)
{
IEvolvable e = null;
IPofReader reader = pofReader.CreateNestedPofReader(typeId);
if (fEvolvable)
{
e = et.GetEvolvable(typeId);
e.DataVersion = reader.VersionId;
}
po.ReadExternal(reader);
Binary binRemainder = reader.ReadRemainder();
if (fEvolvable)
{
e.FutureData = binRemainder;
}
typeId = ((PofStreamReader.UserTypeReader)pofReader).NextPropertyIndex;
}
pofReader.ReadRemainder();
return(po);
}
catch (Exception e)
{
String sClass = null;
try
{
sClass = pofReader.PofContext.GetTypeName(m_nTypeId);
}
catch (Exception)
{
}
throw new IOException(
"An exception occurred instantiating a IPortableObject"
+ " user type from a POF stream: type-id=" + m_nTypeId
+ (sClass == null ? "" : ", class-name=" + sClass)
+ ", exception=\n" + e, e);
}
}
/// <summary>
/// Serialize a user type instance to a POF stream by writing its
/// state using the specified <see cref="IPofWriter"/> object.
/// </summary>
/// <remarks>
/// An implementation of <b>IPofSerializer</b> is required to follow
/// the following steps in sequence for writing out an object of a
/// user type:
/// <list type="number">
/// <item>
/// <description>
/// If the object is evolvable, the implementation must set the
/// version by calling <see cref="IPofWriter.VersionId"/>.
/// </description>
/// </item>
/// <item>
/// <description>
/// The implementation may write any combination of the properties of
/// the user type by using the "write" methods of the
/// <b>IPofWriter</b>, but it must do so in the order of the property
/// indexes.
/// </description>
/// </item>
/// <item>
/// <description>
/// After all desired properties of the user type have been written,
/// the implementation must terminate the writing of the user type by
/// calling <see cref="IPofWriter.WriteRemainder"/>.
/// </description>
/// </item>
/// </list>
/// </remarks>
/// <param name="pofWriter">
/// The <b>IPofWriter</b> with which to write the object's state.
/// </param>
/// <param name="o">
/// The object to serialize.
/// </param>
/// <exception cref="IOException">
/// If an I/O error occurs.
/// </exception>
public void Serialize(IPofWriter pofWriter, Object o)
{
if (!(o is IPortableObject))
{
throw new IOException("Class [" + o.GetType() +
"] does not implement a IPortableObject interface");
}
IPortableObject po = (IPortableObject)o;
bool fEvolvable = o is IEvolvableObject;
IEvolvableObject et = fEvolvable ? (IEvolvableObject)o : null;
try
{
CacheFactory.Log("Serializing " + o.GetType(), CacheFactory.LogLevel.Max);
IPofContext ctx = pofWriter.PofContext;
IEnumerable <int> typeIds = GetTypeIds(o, ctx);
foreach (int typeId in typeIds)
{
IEvolvable e = null;
if (fEvolvable)
{
e = et.GetEvolvable(typeId);
}
IPofWriter writer = pofWriter.CreateNestedPofWriter(typeId, typeId);
if (fEvolvable)
{
writer.VersionId = Math.Max(e.DataVersion, e.ImplVersion);
}
Type type = GetTypeForTypeId(ctx, typeId);
if (type != null)
{
po.WriteExternal(writer);
}
writer.WriteRemainder(fEvolvable ? e.FutureData : null);
}
pofWriter.WriteRemainder(null);
}
catch (Exception e)
{
String sClass = null;
try
{
sClass = pofWriter.PofContext.GetTypeName(m_nTypeId);
}
catch (Exception)
{
}
String sActual = null;
try
{
sActual = o.GetType().FullName;
}
catch (Exception)
{
}
throw new IOException(
"An exception occurred writing a IPortableObject"
+ " user type to a POF stream: type-id=" + m_nTypeId
+ (sClass == null ? "" : ", class-name=" + sClass)
+ (sActual == null ? "" : ", actual class-name=" + sActual)
+ ", exception=" + e, e);
}
}
