/// <summary>
/// Writes a single object to the output binary, using the specified type hint and writer worker.
/// </summary>
/// <typeparam name="T">The type of value.</typeparam>
/// <param name="value">The value to write.</param>
/// <param name="typeWriter">The content type writer.</param>
/// <remarks>The type hint should be retrieved from the Initialize method of the ContentTypeWriter
/// that is calling WriteObject, by calling GetTypeWriter and passing it the type of the field used
/// to hold the value being serialized.
/// </remarks>
public void WriteObject <T>(T value, ContentTypeWriter typeWriter)
{
if (typeWriter == null)
{
throw new ArgumentNullException("typeWriter");
}
if (value == null)
{
// Zero means a null object
Write7BitEncodedInt(0);
}
else
{
Type objectType = typeof(T);
if (!objectType.IsValueType)
{
var index = typeWriterMap[typeWriter.GetType()];
// Because zero means null object, we add one to the index before writing it to the file
Write7BitEncodedInt(index + 1);
}
typeWriter.Write(this, value);
}
}
/// <summary>
/// Retrieves the worker writer for the specified type.
/// </summary>
/// <param name="type">The type.</param>
/// <returns>The worker writer.</returns>
/// <remarks>This should be called from the ContentTypeWriter.Initialize method.</remarks>
public ContentTypeWriter GetTypeWriter(Type type)
{
ContentTypeWriter result = null;
var contentTypeWriterType = typeof(ContentTypeWriter <>).MakeGenericType(type);
Type typeWriterType;
if (type == typeof(Array))
{
result = new ArrayWriter <Array>();
}
else if (typeWriterMap.TryGetValue(contentTypeWriterType, out typeWriterType))
{
result = (ContentTypeWriter)Activator.CreateInstance(typeWriterType);
}
else if (type.IsArray)
{
var writerType = type.GetArrayRank() == 1 ? typeof(ArrayWriter <>) : typeof(MultiArrayWriter <>);
result = (ContentTypeWriter)Activator.CreateInstance(writerType.MakeGenericType(type.GetElementType()));
typeWriterMap.Add(contentTypeWriterType, result.GetType());
}
else if (type.IsEnum)
{
result = (ContentTypeWriter)Activator.CreateInstance(typeof(EnumWriter <>).MakeGenericType(type));
typeWriterMap.Add(contentTypeWriterType, result.GetType());
}
else if (type.IsGenericType)
{
var inputTypeDef = type.GetGenericTypeDefinition();
Type chosen = null;
foreach (var kvp in typeWriterMap)
{
var args = kvp.Key.GetGenericArguments();
if (args.Length == 0)
{
continue;
}
if (!kvp.Value.IsGenericTypeDefinition)
{
continue;
}
if (!args[0].IsGenericType)
{
continue;
}
// Compare generic type definition
var keyTypeDef = args[0].GetGenericTypeDefinition();
if (inputTypeDef == keyTypeDef)
{
chosen = kvp.Value;
break;
}
}
try
{
if (chosen == null)
{
result = (ContentTypeWriter)Activator.CreateInstance(typeof(ReflectiveWriter <>).MakeGenericType(type));
}
else
{
var concreteType = type.GetGenericArguments();
result = (ContentTypeWriter)Activator.CreateInstance(chosen.MakeGenericType(concreteType));
}
// save it for next time.
typeWriterMap.Add(contentTypeWriterType, result.GetType());
}
catch (Exception)
{
throw new InvalidContentException(String.Format("Could not find ContentTypeWriter for type '{0}'", type.Name));
}
}
else
{
result = (ContentTypeWriter)Activator.CreateInstance(typeof(ReflectiveWriter <>).MakeGenericType(type));
typeWriterMap.Add(contentTypeWriterType, result.GetType());
}
var initMethod = result.GetType().GetMethod("Initialize", BindingFlags.NonPublic | BindingFlags.Instance);
initMethod.Invoke(result, new object[] { this });
return(result);
}
public void WriteRawObject <T>(T value, ContentTypeWriter typeWriter)
{
throw new NotImplementedException();
}
internal void RegisterTypeWriter(ContentTypeWriter typeWriter)
{
typeWriters.Add(typeWriter.TargetType, typeWriter);
}
/// <summary>
/// Initialize the writer.
/// </summary>
/// <param name="compiler">Compiler instance calling this writer.</param>
protected override void Initialize(ContentCompiler compiler)
{
base.Initialize(compiler);
elementWriter = compiler.GetTypeWriter(typeof(T));
}
public void WriteRawObject <T>(T value, ContentTypeWriter typeWriter)
{
}
internal void RegisterTypeWriter(ContentTypeWriter typeWriter)
{
typeWriters.Add(typeWriter.TargetType, typeWriter);
}
/// <inheritdoc/>
internal override void OnAddedToContentWriter(ContentWriter output)
{
base.OnAddedToContentWriter(output);
_underlyingType = Enum.GetUnderlyingType(typeof(T));
_underlyingTypeWriter = output.GetTypeWriter(_underlyingType);
}
/// <summary>
/// Retrieves the worker writer for the specified type.
/// </summary>
/// <param name="type">The type.</param>
/// <returns>The worker writer.</returns>
/// <remarks>This should be called from the ContentTypeWriter.Initialize method.</remarks>
public ContentTypeWriter GetTypeWriter(Type type)
{
ContentTypeWriter result = null;
var contentTypeWriterType = typeof(ContentTypeWriter <>).MakeGenericType(type);
Type typeWriterType;
if (typeWriterMap.TryGetValue(contentTypeWriterType, out typeWriterType))
{
result = (ContentTypeWriter)Activator.CreateInstance(typeWriterType);
}
else if (type.IsArray)
{
if (type.GetArrayRank() != 1)
{
throw new NotSupportedException("We don't support multidimensional arrays!");
}
result = (ContentTypeWriter)Activator.CreateInstance(typeof(ArrayWriter <>).MakeGenericType(type.GetElementType()));
typeWriterMap.Add(contentTypeWriterType, result.GetType());
}
else
{
var inputTypeDef = type.GetGenericTypeDefinition();
Type chosen = null;
foreach (var kvp in typeWriterMap)
{
var args = kvp.Key.GetGenericArguments();
if (args.Length == 0)
{
continue;
}
if (!args[0].IsGenericType)
{
continue;
}
// Compare generic type definition
var keyTypeDef = args[0].GetGenericTypeDefinition();
if (inputTypeDef.Equals(keyTypeDef))
{
chosen = kvp.Value;
break;
}
}
try
{
var concreteType = type.GetGenericArguments();
result = (ContentTypeWriter)Activator.CreateInstance(chosen.MakeGenericType(concreteType));
// save it for next time.
typeWriterMap.Add(contentTypeWriterType, result.GetType());
}
catch (Exception)
{
throw new InvalidContentException(String.Format("Could not find ContentTypeWriter for type '{0}'", type.Name));
}
}
if (result != null)
{
MethodInfo dynMethod = result.GetType().GetMethod("Initialize", BindingFlags.NonPublic | BindingFlags.Instance);
dynMethod.Invoke(result, new object[] { this });
}
return(result);
}
/// <inheritdoc/>
internal override void OnAddedToContentWriter(ContentWriter output)
{
base.OnAddedToContentWriter(output);
_elementWriter = output.GetTypeWriter(typeof(T));
}
