private void SetupOverrideMetadata(Type forType, PropertyMetadata typeMetadata, out DependencyObjectType dType, out PropertyMetadata baseMetadata)
{
if (forType == null)
{
throw new ArgumentNullException("forType");
}
if (typeMetadata == null)
{
throw new ArgumentNullException("typeMetadata");
}
if (typeMetadata.Sealed)
{
throw new ArgumentException(SR.Get("TypeMetadataAlreadyInUse"));
}
if (!typeof(DependencyObject).IsAssignableFrom(forType))
{
throw new ArgumentException(SR.Get("TypeMustBeDependencyObjectDerived", forType.Name));
}
if (typeMetadata.IsDefaultValueModified)
{
ValidateMetadataDefaultValue(typeMetadata, PropertyType, Name, ValidateValueCallback);
}
dType = DependencyObjectType.FromSystemType(forType);
baseMetadata = GetMetadata(dType.BaseType);
if (!baseMetadata.GetType().IsAssignableFrom(typeMetadata.GetType()))
{
throw new ArgumentException(SR.Get("OverridingMetadataDoesNotMatchBaseMetadataType"));
}
}
/// <summary>
/// Parameter validation for OverrideMetadata, includes code to force
/// all base classes of "forType" to register their metadata so we know
/// what we are overriding.
/// </summary>
private void SetupOverrideMetadata(
Type forType,
PropertyMetadata typeMetadata,
out DependencyObjectType dType,
out PropertyMetadata baseMetadata)
{
if (forType == null)
{
throw new ArgumentNullException("forType");
}
if (typeMetadata == null)
{
throw new ArgumentNullException("typeMetadata");
}
if (typeMetadata.Sealed)
{
throw new ArgumentException(SR.TypeMetadataAlreadyInUse);
}
if (!typeof(DependencyObject).IsAssignableFrom(forType))
{
throw new ArgumentException(SR.Format(SR.TypeMustBeDependencyObjectDerived, forType.Name));
}
// Ensure default value is a correct value (if it was supplied,
// otherwise, the default value will be taken from the base metadata
// which was already validated)
if (typeMetadata.IsDefaultValueModified)
{
// Will throw ArgumentException if fails.
ValidateMetadataDefaultValue(typeMetadata, PropertyType, Name, ValidateValueCallback);
}
// Force all base classes to register their metadata
dType = DependencyObjectType.FromSystemType(forType);
// Get metadata for the base type
baseMetadata = GetMetadata(dType.BaseType);
// Make sure overriding metadata is the same type or derived type of
// the base metadata
if (!baseMetadata.GetType().IsAssignableFrom(typeMetadata.GetType()))
{
throw new ArgumentException(SR.OverridingMetadataDoesNotMatchBaseMetadataType);
}
}
/// <summary>
/// Parameter validation for OverrideMetadata, includes code to force
/// all base classes of "forType" to register their metadata so we know
/// what we are overriding.
/// </summary>
private void SetupOverrideMetadata(
Type forType,
PropertyMetadata typeMetadata,
out DependencyObjectType dType,
out PropertyMetadata baseMetadata )
{
if (forType == null)
{
throw new ArgumentNullException("forType");
}
if (typeMetadata == null)
{
throw new ArgumentNullException("typeMetadata");
}
if (typeMetadata.Sealed)
{
throw new ArgumentException(SR.Get(SRID.TypeMetadataAlreadyInUse));
}
if (!typeof(DependencyObject).IsAssignableFrom(forType))
{
throw new ArgumentException(SR.Get(SRID.TypeMustBeDependencyObjectDerived, forType.Name));
}
// Ensure default value is a correct value (if it was supplied,
// otherwise, the default value will be taken from the base metadata
// which was already validated)
if (typeMetadata.IsDefaultValueModified)
{
// Will throw ArgumentException if fails.
ValidateMetadataDefaultValue( typeMetadata, PropertyType, Name, ValidateValueCallback );
}
// Force all base classes to register their metadata
dType = DependencyObjectType.FromSystemType(forType);
// Get metadata for the base type
baseMetadata = GetMetadata(dType.BaseType);
// Make sure overriding metadata is the same type or derived type of
// the base metadata
if (!baseMetadata.GetType().IsAssignableFrom(typeMetadata.GetType()))
{
throw new ArgumentException(SR.Get(SRID.OverridingMetadataDoesNotMatchBaseMetadataType));
}
}
