/// <summary>
/// Reloads an asset. If possible, same recursively referenced objects are reused.
/// </summary>
/// <param name="obj">The object.</param>
/// <param name="settings">The settings.</param>
/// <returns>True if it could be reloaded, false otherwise.</returns>
/// <exception cref="System.InvalidOperationException">Asset not loaded through this AssetManager.</exception>
public bool Reload(object obj, AssetManagerLoaderSettings settings = null)
{
if (settings == null)
{
settings = AssetManagerLoaderSettings.Default;
}
lock (LoadedAssetUrls)
{
AssetReference assetReference;
if (!LoadedAssetReferences.TryGetValue(obj, out assetReference))
{
return(false);
}
var url = assetReference.Url;
using (var profile = Profiler.Begin(AssetProfilingKeys.AssetReload, url))
{
DeserializeObject(url, obj.GetType(), obj, settings);
}
return(true);
}
}
private object DeserializeObject(string url, Type type, object obj, AssetManagerLoaderSettings settings)
{
var serializeOperations = new Queue <DeserializeOperation>();
serializeOperations.Enqueue(new DeserializeOperation(null, url, type, obj));
AssetReference reference = null;
if (obj != null)
{
reference = FindDeserializedObject(url, type);
if (reference.Object != obj)
{
throw new InvalidOperationException("Object doesn't match, can't reload");
}
}
// Let's put aside old references, so that we unload them only afterwise (avoid a referenced object to be unloaded for no reason)
HashSet <AssetReference> references = null;
if (reference != null)
{
// Let's collect dependent reference, and reset current list
references = reference.References;
reference.References = new HashSet <AssetReference>();
// Mark object as not deserialized yet
reference.Deserialized = false;
}
bool isFirstOperation = true;
object result = null;
while (serializeOperations.Count > 0)
{
var serializeOperation = serializeOperations.Dequeue();
var deserializedObject = DeserializeObject(serializeOperations, serializeOperation.ParentAssetReference, serializeOperation.Url, serializeOperation.ObjectType, serializeOperation.Object, settings);
if (isFirstOperation)
{
result = deserializedObject;
isFirstOperation = false;
}
}
if (reference != null)
{
foreach (var dependentReference in references)
{
DecrementReference(dependentReference, false);
}
}
return(result);
}
internal object DeserializeObjectRecursive(AssetReference parentAssetReference, out AssetReference assetReference,
string url, Type objType, AssetManagerLoaderSettings settings, ContentSerializerContext otherContext, Stream stream, Type headerObjType, ConverterContext converterContext = null)
{
// Resolve URL
ObjectId objectId;
if (!FileProvider.AssetIndexMap.TryGetValue(url, out objectId))
{
throw new InvalidOperationException(string.Format("Asset [{0}] not found.", url));
}
// Find serializer
var serializer = Serializer.GetSerializer(headerObjType, objType);
if (serializer == null)
{
throw new InvalidOperationException(string.Format("Content serializer for {0}/{1} could not be found.", headerObjType, objType));
}
var contentSerializerContext = new ContentSerializerContext(url, ArchiveMode.Deserialize, this);
contentSerializerContext.chunkReferences.AddRange(otherContext.chunkReferences);
// Create AssetReference
assetReference = new AssetReference(objectId, url, parentAssetReference == null);
contentSerializerContext.AssetReference = assetReference;
var result = serializer.Construct(contentSerializerContext);
var streamReader = new BinarySerializationReader(stream);
PrepareSerializerContext(contentSerializerContext, streamReader.Context);
contentSerializerContext.ConverterContext = converterContext;
result = contentSerializerContext.SerializeContent(streamReader, serializer, result);
SetAssetObject(assetReference, result);
// Add reference
if (parentAssetReference != null)
{
parentAssetReference.References.Add(assetReference);
}
return(result);
}
/// <summary>
/// Loads an asset from the specified URL.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="url">The URL.</param>
/// <param name="settings">The settings.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">url</exception>
public object Load(Type type, string url, AssetManagerLoaderSettings settings = null)
{
if (settings == null)
{
settings = AssetManagerLoaderSettings.Default;
}
if (url == null)
{
throw new ArgumentNullException("url");
}
lock (LoadedAssetUrls)
{
using (var profile = Profiler.Begin(AssetProfilingKeys.AssetLoad, url))
{
return(DeserializeObject(url, type, null, settings));
}
}
}
public T Load <T>(string url, AssetManagerLoaderSettings settings = null) where T : class
{
if (settings == null)
{
settings = AssetManagerLoaderSettings.Default;
}
if (url == null)
{
throw new ArgumentNullException("url");
}
lock (loadedAssetsByUrl)
{
using (var profile = Profiler.Begin(AssetProfilingKeys.AssetLoad, url))
{
AssetReference assetReference;
return((T)DeserializeObject(null, out assetReference, url, typeof(T), settings));
}
}
}
private object DeserializeObject(Queue <DeserializeOperation> serializeOperations, AssetReference parentAssetReference, string url, Type objType, object obj, AssetManagerLoaderSettings settings)
{
// Try to find already loaded object
AssetReference assetReference = FindDeserializedObject(url, objType);
if (assetReference != null && assetReference.Deserialized)
{
// Add reference
bool isRoot = parentAssetReference == null;
if (isRoot || parentAssetReference.References.Add(assetReference))
{
IncrementReference(assetReference, isRoot);
}
return(assetReference.Object);
}
if (!FileProvider.FileExists(url))
{
HandleAssetNotFound(url);
return(null);
}
ContentSerializerContext contentSerializerContext;
object result;
// Open asset binary stream
using (var stream = FileProvider.OpenStream(url, VirtualFileMode.Open, VirtualFileAccess.Read))
{
// File does not exist
// TODO/Benlitz: Add a log entry for that, it's not expected to happen
if (stream == null)
{
return(null);
}
Type headerObjType = null;
// Read header
var streamReader = new BinarySerializationReader(stream);
var chunkHeader = ChunkHeader.Read(streamReader);
if (chunkHeader != null)
{
headerObjType = Type.GetType(chunkHeader.Type);
}
// Find serializer
var serializer = Serializer.GetSerializer(headerObjType, objType);
if (serializer == null)
{
throw new InvalidOperationException(string.Format("Content serializer for {0}/{1} could not be found.", headerObjType, objType));
}
contentSerializerContext = new ContentSerializerContext(url, ArchiveMode.Deserialize, this)
{
LoadContentReferences = settings.LoadContentReferences
};
// Read chunk references
if (chunkHeader != null && chunkHeader.OffsetToReferences != -1)
{
// Seek to where references are stored and deserialize them
streamReader.NativeStream.Seek(chunkHeader.OffsetToReferences, SeekOrigin.Begin);
contentSerializerContext.SerializeReferences(streamReader);
streamReader.NativeStream.Seek(chunkHeader.OffsetToObject, SeekOrigin.Begin);
}
if (assetReference == null)
{
// Create AssetReference
assetReference = new AssetReference(url, parentAssetReference == null);
contentSerializerContext.AssetReference = assetReference;
result = obj ?? serializer.Construct(contentSerializerContext);
SetAssetObject(assetReference, result);
}
else
{
result = assetReference.Object;
contentSerializerContext.AssetReference = assetReference;
}
assetReference.Deserialized = true;
PrepareSerializerContext(contentSerializerContext, streamReader.Context);
contentSerializerContext.SerializeContent(streamReader, serializer, result);
// Add reference
if (parentAssetReference != null)
{
parentAssetReference.References.Add(assetReference);
}
}
if (settings.LoadContentReferences)
{
// Process content references
// TODO: Should we work at ChunkReference level?
foreach (var contentReference in contentSerializerContext.ContentReferences)
{
bool shouldBeLoaded = true;
//AssetReference childReference;
if (settings.ContentFilter != null)
{
settings.ContentFilter(contentReference, ref shouldBeLoaded);
}
if (shouldBeLoaded)
{
serializeOperations.Enqueue(new DeserializeOperation(assetReference, contentReference.Location, contentReference.Type, contentReference.ObjectValue));
}
}
}
return(result);
}
/// <summary>
/// Loads an asset from the specified URL asynchronously.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="url">The URL.</param>
/// <param name="settings">The settings.</param>
/// <returns></returns>
public Task <object> LoadAsync(Type type, string url, AssetManagerLoaderSettings settings = null)
{
return(Task.Factory.StartNew(() => Load(type, url, settings)));
}
/// <summary>
/// Loads an asset from the specified URL asynchronously.
/// </summary>
/// <typeparam name="T">The content type.</typeparam>
/// <param name="url">The URL to load from.</param>
/// <param name="settings">The settings. If null, fallback to <see cref="AssetManagerLoaderSettings.Default" />.</param>
/// <returns></returns>
public Task <T> LoadAsync <T>(string url, AssetManagerLoaderSettings settings = null) where T : class
{
return(Task.Factory.StartNew(() => Load <T>(url, settings)));
}
/// <summary>
/// Loads an asset from the specified URL.
/// </summary>
/// <typeparam name="T">The content type.</typeparam>
/// <param name="url">The URL to load from.</param>
/// <param name="settings">The settings. If null, fallback to <see cref="AssetManagerLoaderSettings.Default" />.</param>
/// <returns></returns>
public T Load <T>(string url, AssetManagerLoaderSettings settings = null) where T : class
{
return((T)Load(typeof(T), url, settings));
}
internal object DeserializeObject(AssetReference parentAssetReference, out AssetReference assetReference, string url, Type objType, AssetManagerLoaderSettings settings, ConverterContext converterContext = null)
{
// Resolve URL
ObjectId objectId;
if (!FileProvider.AssetIndexMap.TryGetValue(url, out objectId))
{
throw new InvalidOperationException(string.Format("Asset [{0}] not found.", url));
}
// Try to find already loaded object
if (loadedAssetsByUrl.TryGetValue(objectId, out assetReference))
{
while (assetReference != null && !objType.GetTypeInfo().IsAssignableFrom(assetReference.Object.GetType().GetTypeInfo()))
{
assetReference = assetReference.Next;
}
if (assetReference != null)
{
// Add reference
bool isRoot = parentAssetReference == null;
if (isRoot || parentAssetReference.References.Add(assetReference))
{
IncrementReference(assetReference, isRoot);
}
return(assetReference.Object);
}
}
if (!FileProvider.FileExists(url))
{
throw new InvalidOperationException(string.Format("Asset [{0}] not found.", url));
}
ContentSerializerContext contentSerializerContext;
object result;
// Open asset binary stream
using (var stream = FileProvider.OpenStream(url, VirtualFileMode.Open, VirtualFileAccess.Read))
{
// File does not exist
// TODO/Benlitz: Add a log entry for that, it's not expected to happen
if (stream == null)
{
return(null);
}
Type headerObjType = null;
// Read header
var streamReader = new BinarySerializationReader(stream);
var chunkHeader = ChunkHeader.Read(streamReader);
if (chunkHeader != null)
{
headerObjType = Type.GetType(chunkHeader.Type);
}
// Find serializer
var serializer = Serializer.GetSerializer(headerObjType, objType);
if (serializer == null)
{
throw new InvalidOperationException(string.Format("Content serializer for {0}/{1} could not be found.", headerObjType, objType));
}
contentSerializerContext = new ContentSerializerContext(url, ArchiveMode.Deserialize, this);
// Read chunk references
if (chunkHeader != null && chunkHeader.OffsetToReferences != -1)
{
// Seek to where references are stored and deserialize them
streamReader.NativeStream.Seek(chunkHeader.OffsetToReferences, SeekOrigin.Begin);
contentSerializerContext.SerializeReferences(streamReader);
streamReader.NativeStream.Seek(chunkHeader.OffsetToObject, SeekOrigin.Begin);
}
// Create AssetReference
assetReference = new AssetReference(objectId, url, parentAssetReference == null);
contentSerializerContext.AssetReference = assetReference;
result = serializer.Construct(contentSerializerContext);
PrepareSerializerContext(contentSerializerContext, streamReader.Context);
contentSerializerContext.ConverterContext = converterContext;
result = contentSerializerContext.SerializeContent(streamReader, serializer, result);
SetAssetObject(assetReference, result);
// Add reference
if (parentAssetReference != null)
{
parentAssetReference.References.Add(assetReference);
}
}
if (settings.LoadContentReferences)
{
// Process content references
// TODO: Should we work at ChunkReference level?
foreach (var contentReference in contentSerializerContext.ContentReferences)
{
bool shouldBeLoaded = true;
AssetReference childReference;
if (settings.ContentFilter != null)
{
settings.ContentFilter(contentReference, ref shouldBeLoaded);
}
if (shouldBeLoaded)
{
contentReference.ObjectValue = DeserializeObject(assetReference, out childReference, contentReference.Location, contentReference.Type, settings);
}
}
}
return(result);
}
