public static void WalkTypes(List <Type> knownTypes)
{
Type newType = typeof(T);
if (knownTypes.Contains(newType))
{
return;
}
knownTypes.Add(newType);
foreach (Property <T> prop in writeProps)
{
bool dummy;
Type propType = prop.PropertyType,
actualType = Nullable.GetUnderlyingType(propType)
?? PropertyFactory.GetListType(propType, out dummy) ?? propType;
if (Serializer.IsEntityType(actualType))
{
typeof(Serializer <>)
.MakeGenericType(actualType)
.GetMethod("WalkTypes")
.Invoke(null, new object[] { knownTypes });
}
else if (actualType.IsEnum)
{
if (!knownTypes.Contains(actualType))
{
knownTypes.Add(actualType);
}
}
}
}
/// <summary>
/// Can the given type be meaningfully with protobuf-net?
/// </summary>
public static bool CanSerialize(Type type)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
if (type.IsValueType)
{
return(false);
}
// serialize as item?
if (Serializer.IsEntityType(type))
{
return(true);
}
// serialize as list?
bool enumOnly;
Type itemType = PropertyFactory.GetListType(type, out enumOnly);
if (itemType != null &&
(!enumOnly || Serializer.HasAddMethod(type, itemType)) &&
Serializer.IsEntityType(itemType))
{
return(true);
}
return(false);
}
static SerializerProxy()
{
if (Serializer.IsEntityType(typeof(T)))
{
Default = (SerializerProxy <T>) typeof(SerializerProxy <T>).GetMethod("MakeItem")
.MakeGenericMethod(typeof(T)).Invoke(null, null);
}
else // see if our property-factory can handle this type; if it can, use a wrapper object
{
try
{
DataFormat fmt = DataFormat.Default;
if (PropertyFactory.CreatePassThru <T>(1, ref fmt) != null)
{
Default = (SerializerProxy <T>) typeof(SerializerProxy <T>).GetMethod("MakeValue")
.MakeGenericMethod(typeof(T)).Invoke(null, null);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString(), "SerializerProxy.cctor");
// nope, can't do it...
}
}
if (Default == null)
{
throw new InvalidOperationException("Only data-contract classes (and lists/arrays of such) can be processed (error processing " + typeof(T).Name + ")");
}
}
private static void BuildCallbacks()
{
MethodInfo[] methods = typeof(T).GetMethods(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic
| BindingFlags.DeclaredOnly);
// protobuf-net specific
FindCallback(methods, CallbackType.BeforeSerialization, typeof(ProtoBeforeSerializationAttribute));
FindCallback(methods, CallbackType.AfterSerialization, typeof(ProtoAfterSerializationAttribute));
FindCallback(methods, CallbackType.BeforeDeserialization, typeof(ProtoBeforeDeserializationAttribute));
FindCallback(methods, CallbackType.AfterDeserialization, typeof(ProtoAfterDeserializationAttribute));
#if !SILVERLIGHT && !CF
// regular framework
FindCallback(methods, CallbackType.BeforeSerialization, typeof(OnSerializingAttribute));
FindCallback(methods, CallbackType.AfterSerialization, typeof(OnSerializedAttribute));
FindCallback(methods, CallbackType.BeforeDeserialization, typeof(OnDeserializingAttribute));
FindCallback(methods, CallbackType.AfterDeserialization, typeof(OnDeserializedAttribute));
#endif
Type root = typeof(T).BaseType;
bool isRoot = !Serializer.IsEntityType(root);
if (!isRoot)
{
while (Serializer.IsEntityType(root.BaseType))
{
root = root.BaseType;
}
}
if (callbacks != null)
{
if (!isRoot)
{
throw new ProtoException(
"Callbacks are only supported on the root contract type in an inheritance tree; consider implementing callbacks as virtual methods on " +
root.FullName);
}
// otherwise, use BeforeDeserialization for ObjectCreation:
callbacks[(int)CallbackType.ObjectCreation] = callbacks[(int)CallbackType.BeforeDeserialization];
}
else
{
methods = root.GetMethods(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic
| BindingFlags.DeclaredOnly);
FindCallback(methods, CallbackType.ObjectCreation, typeof(ProtoBeforeDeserializationAttribute));
#if !SILVERLIGHT && !CF
FindCallback(methods, CallbackType.ObjectCreation, typeof(OnDeserializingAttribute));
#endif
}
}
public static SerializerProxy <TItem> MakeItem <TItem>()
where TItem : class, T
{
Type actualType = typeof(TItem), baseType = actualType;
while (Serializer.IsEntityType(baseType.BaseType))
{
baseType = baseType.BaseType;
}
if (baseType == actualType)
{
return(new SerializerItemProxy <TItem, TItem>());
}
return((SerializerProxy <TItem>)Activator.CreateInstance(
typeof(SerializerItemProxy <,>).MakeGenericType(baseType, actualType)));
}
internal static void Build()
{
if (readProps != null)
{
return; // completely built and ready for use
}
#if CF // no wait option on CF
if (!Monitor.TryEnter(lockToken))
#else // give it a few seconds on regular .NET
if (!Monitor.TryEnter(lockToken, 5000))
#endif
{
throw new InvalidOperationException("Possible deadlock detected preparing serializer for " + typeof(T).Name + "; try using Serializer.PrepareSerializer to initialize this type at application startup.");
}
try
{
if (readProps != null || subclasses != null)
{
// readProps != null : double-checked locking
// readProps == null, but subclasses != null :
// this scenario means that we are in the process of building the
// serializer; since we hold the lock, this must be re-entrancy, so simply ignore
//Trace.WriteLine("Re-entrant short-circuit: " + typeof(T).FullName, "ProtoBuf.Serializer:Build");
return;
}
//Trace.WriteLine("Building: " + typeof(T).FullName, "ProtoBuf.Serializer:Build");
// otherwise we are building the serializer for the first time; initialize
// subclasses as a marker that we are in-progress
subclasses = new KeyValuePair <Type, Property <T, T> > [0]; // use this to prevent recursion
if (!Serializer.IsEntityType(typeof(T)))
{
throw new InvalidOperationException("Only data-contract classes can be processed (error processing " + typeof(T).Name + ")");
}
BuildCallbacks();
List <Property <T> > readPropList = new List <Property <T> >(), writePropList = new List <Property <T> >();
List <int> tagsInUse = new List <int>();
foreach (MemberInfo prop in Serializer.GetProtoMembers(typeof(T)))
{
string name;
DataFormat format;
int tag;
MemberSerializationOptions options;
if (!Serializer.TryGetTag(prop, out tag, out name, out format, out options))
{
continue; // didn't recognise this as a usable property
}
// check for duplicates
if (tagsInUse.Contains(tag))
{
throw new InvalidOperationException(
string.Format("Duplicate tag {0} detected in {1}", tag, name));
}
tagsInUse.Add(tag);
Property <T> actualProp = PropertyFactory.Create <T>(prop);
writePropList.Add(actualProp);
readPropList.Add(actualProp);
foreach (Property <T> altProp in actualProp.GetCompatibleReaders())
{
if (altProp.Tag != actualProp.Tag)
{
throw new ProtoException("Alternative readers must handle the same tag");
}
foreach (Property <T> tmp in readPropList)
{
if (tmp.FieldPrefix == altProp.FieldPrefix)
{
throw new ProtoException("Alternative readers must handle different wire-types");
}
}
readPropList.Add(altProp);
}
}
#if CF2
CrapSort(readPropList, delegate(Property <T> x, Property <T> y) { return(x.FieldPrefix.CompareTo(y.FieldPrefix)); });
CrapSort(writePropList, delegate(Property <T> x, Property <T> y) { return(x.FieldPrefix.CompareTo(y.FieldPrefix)); });
#else
readPropList.Sort(delegate(Property <T> x, Property <T> y) { return(x.FieldPrefix.CompareTo(y.FieldPrefix)); });
writePropList.Sort(delegate(Property <T> x, Property <T> y) { return(x.FieldPrefix.CompareTo(y.FieldPrefix)); });
#endif
List <KeyValuePair <Type, Property <T, T> > > subclassList = new List <KeyValuePair <Type, Property <T, T> > >();
foreach (ProtoIncludeAttribute pia in Attribute.GetCustomAttributes(typeof(T), typeof(ProtoIncludeAttribute), false))
{
Type subclassType = pia.ResolveKnownType(typeof(T).Assembly);
if (subclassType == null)
{
throw new ProtoException("Unable to identify known-type for ProtoIncludeAttribute: " + pia.KnownTypeName);
}
if (subclassType.BaseType != typeof(T))
{
throw new ProtoException(string.Format(
"Known-type {0} for ProtoIncludeAttribute must be a direct subclass of {1}",
subclassType.Name, typeof(T).Name));
}
Property <T, T> prop;
switch (pia.DataFormat)
{
case DataFormat.Default:
prop = (Property <T, T>) PropertyUtil <T> .CreateTypedProperty("CreatePropertyMessageString", typeof(T), typeof(T), subclassType);
break;
case DataFormat.Group:
prop = (Property <T, T>) PropertyUtil <T> .CreateTypedProperty("CreatePropertyMessageGroup", typeof(T), typeof(T), subclassType);
break;
default:
throw new ProtoException("Invalid ProtoIncludeAttribute data-format: " + pia.DataFormat);
}
// check for duplicates
if (tagsInUse.Contains(pia.Tag))
{
throw new InvalidOperationException(
string.Format("Duplicate tag {0} detected in sub-type {1}", pia.Tag, subclassType.Name));
}
tagsInUse.Add(pia.Tag);
prop.Init(pia.Tag, pia.DataFormat, PropertyFactory.GetPassThru <T>(), null, true, null);
subclassList.Add(new KeyValuePair <Type, Property <T, T> >(subclassType, prop));
}
subclasses = subclassList.ToArray();
writeProps = writePropList.ToArray();
readProps = readPropList.ToArray(); // this must be last; this lets other threads see the data
}
catch (Exception ex)
{
readProps = writeProps = null;
subclasses = null;
Debug.WriteLine("Build() failed for type: " + typeof(T).AssemblyQualifiedName);
Debug.WriteLine(ex);
throw;
}
finally
{
Monitor.Exit(lockToken);
}
}
