/// <summary>
/// Retrieves the appropriate custom attribute builder for a given attribute instance
/// </summary>
/// <param name="attributeType">The attribute type. It cannot be null.</param>
/// <returns>The custom attribute builder for it.</returns>
private static ICustomAttributeBuilder GetCustomAttributeBuilder(Type attributeType)
{
if (attributeType == null)
{
throw new ArgumentNullException("attributeType");
}
ICustomAttributeBuilder cab = null;
// We maintain a cache of known builder instances, created lazily
if (KnownBuilders.TryGetValue(attributeType, out cab))
{
return(cab);
}
// Don't have a builder instance yet
// See if we have a registered builder type for this attribute
Type cabType = null;
if (!KnownBuilderTypes.TryGetValue(attributeType, out cabType))
{
// Don't have an explicit builder -- see if we this attribute derives from
// a known builder type and assume it is okay to use it.
foreach (KeyValuePair <Type, Type> pair in KnownBuilderTypes)
{
if (pair.Key.IsAssignableFrom(attributeType))
{
cabType = pair.Value;
break;
}
}
}
// If don't have a builder -- see if the attribute is visible to the
// client. If so, we will attempt to build with our standard builder
if (cabType == null)
{
cabType = typeof(StandardCustomAttributeBuilder);
}
// If we found a builder type, instantiate it now. We'll reuse it
cab = Activator.CreateInstance(cabType) as ICustomAttributeBuilder;
// Don't cache null builders, because we may be re-using this cache for a next code-gen
// run where we may have a different set of shared types.
// TODO: We need to get rid of our static caches, because caches look different between
// builds of different DomainServices. E.g. for one DomainService an attribute may
// be shared, while in another it's not, and thus the KnownBuilders mapping is
// different between the two.
// Instead of static caches, we should consider storing state per build in a context
// object. The context object would not be shared against different builds of different
// DomainServices.
if (cab != null)
{
KnownBuilders[attributeType] = cab;
}
return(cab);
}
/// <summary>
/// Retrieves the appropriate custom attribute builder for a given attribute instance
/// </summary>
/// <param name="attributeType">The attribute type. It cannot be null.</param>
/// <returns>The custom attribute builder for it.</returns>
private static ICustomAttributeBuilder GetCustomAttributeBuilder(Type attributeType)
{
if (attributeType == null)
{
throw new ArgumentNullException("attributeType");
}
ICustomAttributeBuilder cab = null;
// We maintain a cache of known builder instances, created lazily
if (KnownBuilders.TryGetValue(attributeType, out cab))
{
return(cab);
}
// Don't have a builder instance yet
// See if we have a registered builder type for this attribute
Type cabType = null;
if (!KnownBuilderTypes.TryGetValue(attributeType, out cabType))
{
// Don't have an explicit builder -- see if we this attribute derives from
// a known builder type and assume it is okay to use it.
foreach (KeyValuePair <Type, Type> pair in KnownBuilderTypes)
{
if (pair.Key.IsAssignableFrom(attributeType))
{
cabType = pair.Value;
break;
}
}
}
// If don't have a builder -- see if the attribute is visible to the
// client. If so, we will attempt to build with our standard builder
if (cabType == null)
{
cabType = typeof(StandardCustomAttributeBuilder);
}
// If we found a builder type, instantiate it now. We'll reuse it
if (cabType != null)
{
cab = Activator.CreateInstance(cabType) as ICustomAttributeBuilder;
}
// Don't cache null builders, because we may be re-using this cache for a next code-gen
// run where we may have a different set of shared types.
if (cab != null)
{
KnownBuilders[attributeType] = cab;
}
return(cab);
}
