public static MetadataViewFactory GetMetadataViewFactory(Type viewType)
{
Assumes.NotNull(viewType);
Assumes.IsTrue(viewType.IsInterface);
MetadataViewFactory metadataViewFactory;
bool foundMetadataViewFactory;
using (new ReadLock(_lock))
{
foundMetadataViewFactory = _metadataViewFactories.TryGetValue(viewType, out metadataViewFactory);
}
// No factory exists
if (!foundMetadataViewFactory)
{
// Try again under a write lock if still none generate the proxy
Type generatedProxyType = GenerateInterfaceViewProxyType(viewType);
Assumes.NotNull(generatedProxyType);
MetadataViewFactory generatedMetadataViewFactory = (MetadataViewFactory)Delegate.CreateDelegate(
typeof(MetadataViewFactory), generatedProxyType.GetMethod(MetadataViewGenerator.MetadataViewFactoryName, BindingFlags.Public | BindingFlags.Static));
Assumes.NotNull(generatedMetadataViewFactory);
using (new WriteLock(_lock))
{
if (!_metadataViewFactories.TryGetValue(viewType, out metadataViewFactory))
{
metadataViewFactory = generatedMetadataViewFactory;
_metadataViewFactories.Add(viewType, metadataViewFactory);
}
}
}
return(metadataViewFactory);
}
public static TMetadataView CreateMetadataView <TMetadataView>(MetadataViewFactory metadataViewFactory, IDictionary <string, object> metadata)
{
Assumes.NotNull(metadataViewFactory);
// we are simulating the Activator.CreateInstance behavior by wrapping everything in a TargetInvocationException
try
{
return((TMetadataView)metadataViewFactory.Invoke(metadata));
}
catch (Exception e)
{
throw new TargetInvocationException(e);
}
}
public static MetadataViewFactory GetMetadataViewFactory(Type viewType)
{
if (viewType == null)
{
throw new ArgumentNullException(nameof(viewType));
}
if (!viewType.IsInterface)
{
throw new Exception(SR.Diagnostic_InternalExceptionMessage);
}
MetadataViewFactory metadataViewFactory;
bool foundMetadataViewFactory;
using (new ReadLock(_lock))
{
foundMetadataViewFactory = _metadataViewFactories.TryGetValue(viewType, out metadataViewFactory);
}
// No factory exists
if (!foundMetadataViewFactory)
{
// Try again under a write lock if still none generate the proxy
Type generatedProxyType = GenerateInterfaceViewProxyType(viewType);
if (generatedProxyType == null)
{
throw new Exception(SR.Diagnostic_InternalExceptionMessage);
}
MetadataViewFactory generatedMetadataViewFactory = (MetadataViewFactory)Delegate.CreateDelegate(
typeof(MetadataViewFactory), generatedProxyType.GetMethod(MetadataViewGenerator.MetadataViewFactoryName, BindingFlags.Public | BindingFlags.Static));
if (generatedMetadataViewFactory == null)
{
throw new Exception(SR.Diagnostic_InternalExceptionMessage);
}
using (new WriteLock(_lock))
{
if (!_metadataViewFactories.TryGetValue(viewType, out metadataViewFactory))
{
metadataViewFactory = generatedMetadataViewFactory;
_metadataViewFactories.Add(viewType, metadataViewFactory);
}
}
}
return(metadataViewFactory);
}
