/// <summary>
/// Gets the <see cref="MessagePackSerializer{T}"/> with this instance.
/// </summary>
/// <typeparam name="T">Type of serialization/deserialization target.</typeparam>
/// <param name="providerParameter">A provider specific parameter. See remarks section for details.</param>
/// <returns>
/// <see cref="MessagePackSerializer{T}"/>.
/// If there is exiting one, returns it.
/// Else the new instance will be created.
/// </returns>
/// <remarks>
/// <para>
/// This method automatically register new instance via <see cref="SerializerRepository.Register{T}(MessagePackSerializer{T})"/>.
/// </para>
/// <para>
/// Currently, only following provider parameters are supported.
/// <list type="table">
/// <listheader>
/// <term>Target type</term>
/// <description>Provider parameter</description>
/// </listheader>
/// <item>
/// <term><see cref="EnumMessagePackSerializer{TEnum}"/> or its descendants.</term>
/// <description><see cref="EnumSerializationMethod"/>. The returning instance corresponds to this value for serialization.</description>
/// </item>
/// </list>
/// <note><c>null</c> is valid value for <paramref name="providerParameter"/> and it indeicates default behavior of parameter.</note>
/// </para>
/// </remarks>
public MessagePackSerializer<T> GetSerializer<T>( object providerParameter )
{
#if !UNITY
Contract.Ensures( Contract.Result<MessagePackSerializer<T>>() != null );
#endif // !UNITY
var schema = providerParameter as PolymorphismSchema;
// Explicitly generated serializer should always used, so get it first.
MessagePackSerializer<T> serializer = this._serializers.Get<T>( this, providerParameter );
if ( serializer != null )
{
return serializer;
}
object aquiredLock = null;
bool lockTaken = false;
try
{
try { }
finally
{
var newLock = new object();
#if SILVERLIGHT || NETFX_35 || UNITY
Monitor.Enter( newLock );
try
{
lock ( this._typeLock )
{
lockTaken = !this._typeLock.TryGetValue( typeof( T ), out aquiredLock );
if ( lockTaken )
{
aquiredLock = newLock;
this._typeLock.Add( typeof( T ), newLock );
}
}
#else
bool newLockTaken = false;
try
{
Monitor.Enter( newLock, ref newLockTaken );
aquiredLock = this._typeLock.GetOrAdd( typeof( T ), _ => newLock );
lockTaken = newLock == aquiredLock;
#endif // if SILVERLIGHT || NETFX_35 || UNITY
}
finally
{
#if SILVERLIGHT || NETFX_35 || UNITY
if ( !lockTaken )
#else
if ( !lockTaken && newLockTaken )
#endif // if SILVERLIGHT || NETFX_35 || UNITY
{
// Release the lock which failed to become 'primary' lock.
Monitor.Exit( newLock );
}
}
}
if ( Monitor.TryEnter( aquiredLock ) )
{
// Decrement monitor counter.
Monitor.Exit( aquiredLock );
#if DEBUG && !NETFX_40 && !NETFX_35 && !SILVERLIGHT && !UNITY
Contract.Assert( Monitor.IsEntered( aquiredLock ), "Monitor.IsEntered(aquiredLock)" );
#endif // DEBUG && !NETFX_40 && !NETFX_35 !SILVERLIGHT && && !UNITY
if ( lockTaken )
{
// First try to create generic serializer w/o code generation.
serializer = GenericSerializer.Create<T>( this, schema );
if ( serializer == null )
{
#if !XAMIOS && !XAMDROID && !UNITY
if ( this.IsRuntimeGenerationDisabled )
{
#endif // !XAMIOS && !XAMDROID && !UNITY
// On debugging, or AOT only envs, use reflection based aproach.
serializer =
this.GetSerializerWithoutGeneration<T>( schema )
?? this.OnResolveSerializer<T>( schema )
?? MessagePackSerializer.CreateReflectionInternal<T>( this, this.EnsureConcreteTypeRegistered( typeof( T ) ), schema );
#if !XAMIOS && !XAMDROID && !UNITY
}
else
{
// This thread creating new type serializer.
serializer = this.OnResolveSerializer<T>( schema ) ?? MessagePackSerializer.CreateInternal<T>( this, schema );
}
#endif // !XAMIOS && !XAMDROID && !UNITY
}
}
else
{
// This thread owns existing lock -- thus, constructing self-composite type.
// Prevent release owned lock.
aquiredLock = null;
return new LazyDelegatingMessagePackSerializer<T>( this, providerParameter );
}
// Some types always have to use provider.
MessagePackSerializerProvider provider;
var asEnumSerializer = serializer as ICustomizableEnumSerializer;
if ( asEnumSerializer != null )
{
#if DEBUG && !UNITY
Contract.Assert( typeof( T ).GetIsEnum(), typeof( T ) + " is not enum but generated serializer is ICustomizableEnumSerializer" );
#endif // DEBUG && !UNITY
provider = new EnumMessagePackSerializerProvider( typeof( T ), asEnumSerializer );
}
else
{
#if DEBUG && !UNITY
Contract.Assert( !typeof( T ).GetIsEnum(), typeof( T ) + " is enum but generated serializer is not ICustomizableEnumSerializer : " + ( serializer == null ? "null" : serializer.GetType().FullName ) );
#endif // DEBUG && !UNITY
// Creates provider even if no schema -- the schema might be specified future for the type.
// It is OK to use polymorphic provider for value type.
#if !UNITY
provider = new PolymorphicSerializerProvider<T>( serializer );
#else
provider = new PolymorphicSerializerProvider<T>( this, serializer );
#endif // !UNITY
}
#if !UNITY
Type nullableType;
MessagePackSerializerProvider nullableSerializerProvider;
SerializerRepository.GetNullableCompanion(
typeof( T ),
this,
serializer,
out nullableType,
out nullableSerializerProvider
);
this._serializers.Register(
typeof( T ),
provider,
nullableType,
nullableSerializerProvider,
SerializerRegistrationOptions.WithNullable
);
#else
this._serializers.Register(
typeof( T ),
provider,
null,
null,
SerializerRegistrationOptions.None
);
#endif // !UNITY
}
else
{
// Wait creation by other thread.
// Acquire as 'waiting' lock.
Monitor.Enter( aquiredLock );
}
// Re-get to avoid duplicated registration and handle provider parameter or get the one created by prececing thread.
// If T is null and schema is not provided or default schema is provided, then exception will be thrown here from the new provider.
return this._serializers.Get<T>( this, providerParameter );
}
finally
{
if ( lockTaken )
{
#if SILVERLIGHT || NETFX_35 || UNITY
lock ( this._typeLock )
{
this._typeLock.Remove( typeof( T ) );
}
#else
object dummy;
this._typeLock.TryRemove( typeof( T ), out dummy );
#endif // if SILVERLIGHT || NETFX_35 || UNITY
}
if ( aquiredLock != null )
{
// Release primary lock or waiting lock.
Monitor.Exit( aquiredLock );
#if DEBUG && !NETFX_40 && !NETFX_35 && !SILVERLIGHT && !UNITY
Contract.Assert( !Monitor.IsEntered( aquiredLock ), "!Monitor.IsEntered(aquiredLock)" );
#endif // DEBUG && !NETFX_40 && !NETFX_35 && !SILVERLIGHT && !UNITY
}
}
}
/// <summary>
/// Gets the <see cref="MessagePackSerializer{T}"/> with this instance.
/// </summary>
/// <typeparam name="T">Type of serialization/deserialization target.</typeparam>
/// <param name="providerParameter">A provider specific parameter. See remarks section for details.</param>
/// <returns>
/// <see cref="MessagePackSerializer{T}"/>.
/// If there is exiting one, returns it.
/// Else the new instance will be created.
/// </returns>
/// <remarks>
/// <para>
/// This method automatically register new instance via <see cref="SerializerRepository.Register{T}(MessagePackSerializer{T})"/>.
/// </para>
/// <para>
/// Currently, only following provider parameters are supported.
/// <list type="table">
/// <listheader>
/// <term>Target type</term>
/// <description>Provider parameter</description>
/// </listheader>
/// <item>
/// <term><see cref="EnumMessagePackSerializer{TEnum}"/> or its descendants.</term>
/// <description><see cref="EnumSerializationMethod"/>. The returning instance corresponds to this value for serialization.</description>
/// </item>
/// </list>
/// <note><c>null</c> is valid value for <paramref name="providerParameter"/> and it indeicates default behavior of parameter.</note>
/// </para>
/// </remarks>
public MessagePackSerializer<T> GetSerializer<T>( object providerParameter )
{
#if DEBUG
Contract.Ensures( Contract.Result<MessagePackSerializer<T>>() != null );
#endif // DEBUG
// Explicitly generated serializer should always used, so get it first.
MessagePackSerializer<T> serializer = this._serializers.Get<T>( this, providerParameter );
if ( serializer != null )
{
return serializer;
}
bool lockTaken = false;
lock ( this._generationLock )
{
// Re-get to check because other thread might create the serializer when I wait the lock.
serializer = this._serializers.Get<T>( this, providerParameter );
if ( serializer != null )
{
return serializer;
}
try
{
try { }
finally
{
#if !FEATURE_CONCURRENT
lock ( this._typeLock )
{
var typeLock = new object();
object aquiredLock;
lockTaken = !this._typeLock.TryGetValue( typeof( T ), out aquiredLock );
if ( lockTaken )
{
this._typeLock.Add( typeof( T ), typeLock );
}
}
#else
var typeLock = new object();
var aquiredTypeLock = this._typeLock.GetOrAdd( typeof( T ), _ => typeLock );
lockTaken = typeLock == aquiredTypeLock;
#endif // !FEATURE_CONCURRENT
}
if ( lockTaken )
{
// First try to create generic serializer w/o code generation.
var schema = ( providerParameter ?? PolymorphismSchema.Create( typeof( T ), null ) ) as PolymorphismSchema;
serializer = GenericSerializer.Create<T>( this, schema );
if ( serializer == null )
{
#if !UNITY
if ( !this._serializerGeneratorOptions.CanRuntimeCodeGeneration )
{
#endif // !UNITY
// On debugging, or AOT only envs, use reflection based aproach.
serializer =
this.GetSerializerWithoutGeneration<T>( schema )
?? this.OnResolveSerializer<T>( schema )
?? MessagePackSerializer.CreateReflectionInternal<T>( this, this.EnsureConcreteTypeRegistered( typeof( T ) ), schema );
#if !UNITY
}
else
{
// This thread creating new type serializer.
serializer = this.OnResolveSerializer<T>( schema ) ?? MessagePackSerializer.CreateInternal<T>( this, schema );
}
#endif // !UNITY
}
}
else
{
// This thread owns existing lock -- thus, constructing self-composite type.
return new LazyDelegatingMessagePackSerializer<T>( this, providerParameter );
}
// Some types always have to use provider.
MessagePackSerializerProvider provider;
var asEnumSerializer = serializer as ICustomizableEnumSerializer;
if ( asEnumSerializer != null )
{
#if DEBUG
Contract.Assert( typeof( T ).GetIsEnum(), typeof( T ) + " is not enum but generated serializer is ICustomizableEnumSerializer" );
#endif // DEBUG
provider = new EnumMessagePackSerializerProvider( typeof( T ), asEnumSerializer );
}
else
{
#if DEBUG
Contract.Assert( !typeof( T ).GetIsEnum(), typeof( T ) + " is enum but generated serializer is not ICustomizableEnumSerializer : " + ( serializer == null ? "null" : serializer.GetType().FullName ) );
#endif // DEBUG
// Creates provider even if no schema -- the schema might be specified future for the type.
// It is OK to use polymorphic provider for value type.
#if !UNITY
provider = new PolymorphicSerializerProvider<T>( serializer );
#else
provider = new PolymorphicSerializerProvider<T>( this, serializer );
#endif // !UNITY
}
#if !UNITY
Type nullableType;
MessagePackSerializerProvider nullableSerializerProvider;
SerializerRepository.GetNullableCompanion(
typeof( T ),
this,
serializer,
out nullableType,
out nullableSerializerProvider
);
this._serializers.Register(
typeof( T ),
provider,
nullableType,
nullableSerializerProvider,
SerializerRegistrationOptions.WithNullable
);
#else
this._serializers.Register(
typeof( T ),
provider,
null,
null,
SerializerRegistrationOptions.None
);
#endif // !UNITY
// Re-get to avoid duplicated registration and handle provider parameter or get the one created by prececing thread.
// If T is null and schema is not provided or default schema is provided, then exception will be thrown here from the new provider.
return this._serializers.Get<T>( this, providerParameter );
}
finally
{
if ( lockTaken )
{
#if !FEATURE_CONCURRENT
lock ( this._typeLock )
{
this._typeLock.Remove( typeof( T ) );
}
#else
object dummy;
this._typeLock.TryRemove( typeof( T ), out dummy );
#endif // !FEATURE_CONCURRENT
}
}
}
}