/// <summary>
/// Creates a new relation between the supplied <see cref="InstanceDescriptor"/> and instance.
/// </summary>
/// <param name="instanceDescriptor">The <see cref="InstanceDescriptor"/>.</param>
/// <param name="instance">The instance.</param>
/// <exception cref="InvalidOperationException">The relation between the supplied <see cref="InstanceDescriptor"/> and instance already exists.</exception>
/// <exception cref="ArgumentNullException">The value of '<paramref name="instanceDescriptor"/>' and '<paramref name="instance"/>' cannot be null.</exception>
public void CreateRelation(InstanceDescriptor instanceDescriptor, Object instance)
{
if (instanceDescriptor == null)
{
throw new ArgumentNullException(nameof(instanceDescriptor));
}
if (instance == null)
{
throw new ArgumentNullException(nameof(instance));
}
if (
this.instanceDescriptorInstanceRelations.Any(
idir => idir.InstanceDescriptor == instanceDescriptor && idir.Instance == instance))
{
throw new InvalidOperationException(String.Format(ExceptionMessages.RelationAlreadyPresentExceptionMessage, instanceDescriptor.AssemblyQualifiedTypeName, instance.GetType().Name));
}
var newInstanceRelation = new InstanceDescriptorInstanceRelation(instanceDescriptor, instance);
this.instanceDescriptorInstanceRelations.Add(newInstanceRelation);
this.OnInstanceRelationChanged(newInstanceRelation, InstanceRelationChangeType.Created);
}
/// <summary>
/// Raises the InstanceRelationChanged event.
/// </summary>
/// <param name="relation">The <see cref="InstanceDescriptorInstanceRelation"/> relation.</param>
/// <param name="changeType">The type of change occured.</param>
/// <exception cref="ArgumentNullException">The value of '<paramref name="relation"/>' cannot be null.</exception>
private void OnInstanceRelationChanged([NotNull] InstanceDescriptorInstanceRelation relation,
InstanceRelationChangeType changeType)
{
if (relation == null)
{
throw new ArgumentNullException(nameof(relation));
}
var handler = this.instanceRelationChanged;
handler?.Invoke(this, new InstanceRelationChangedEventArgs(relation.InstanceDescriptor, relation.Instance, changeType));
}
