/// <summary>
/// Initializes a new instance of the EntityRef class
/// </summary>
/// <param name="parent">The entity that this association is a member of</param>
/// <param name="memberName">The name of this EntityRef member on the parent entity</param>
/// <param name="entityPredicate">The function used to filter the associated entity.</param>
public EntityRef(Entity parent, string memberName, Func <TEntity, bool> entityPredicate)
{
if (parent == null)
{
throw new ArgumentNullException("parent");
}
if (string.IsNullOrEmpty(memberName))
{
throw new ArgumentNullException("memberName");
}
if (entityPredicate == null)
{
throw new ArgumentNullException("entityPredicate");
}
this._parent = parent;
this._entityPredicate = entityPredicate;
this._memberName = memberName;
PropertyInfo propInfo = this._parent.GetType().GetProperty(memberName, OpenRiaServices.DomainServices.Client.MetaType.MemberBindingFlags);
if (propInfo == null)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Resource.Property_Does_Not_Exist, parent.GetType(), memberName), "memberName");
}
this._assocAttribute = propInfo.GetCustomAttributes(false).OfType <AssociationAttribute>().SingleOrDefault();
if (this._assocAttribute == null)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Resource.MemberMustBeAssociation, memberName), "memberName");
}
this._isComposition = propInfo.GetCustomAttributes(typeof(CompositionAttribute), false).Any();
// register our callback so we'll be notified whenever the
// parent entity is added or removed from an EntitySet
this._parent.RegisterSetChangedCallback(this.OnEntitySetChanged);
this._parent.SetEntityRef(memberName, this);
this._parent.PropertyChanged += this.ParentEntityPropertyChanged;
}
/// <summary>
/// Initializes a new instance of the EntityRef class
/// </summary>
/// <param name="parent">The entity that this association is a member of</param>
/// <param name="memberName">The name of this EntityRef member on the parent entity</param>
/// <param name="entityPredicate">The function used to filter the associated entity.</param>
public EntityRef(Entity parent, string memberName, Func <TEntity, bool> entityPredicate)
{
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
if (string.IsNullOrEmpty(memberName))
{
throw new ArgumentNullException(nameof(memberName));
}
if (entityPredicate == null)
{
throw new ArgumentNullException(nameof(entityPredicate));
}
this._parent = parent;
this._entityPredicate = entityPredicate;
this._metaMember = this._parent.MetaType[memberName];
if (this._metaMember == null)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Resource.Property_Does_Not_Exist, parent.GetType(), memberName), nameof(memberName));
}
if (this._metaMember.AssociationAttribute == null)
{
throw new ArgumentException(string.Format(CultureInfo.CurrentCulture, Resource.MemberMustBeAssociation, memberName), nameof(memberName));
}
// register our callback so we'll be notified whenever the
// parent entity is added or removed from an EntitySet
this._parent.RegisterSetChangedCallback(this.OnEntitySetChanged);
this._parent.SetEntityRef(memberName, this);
this._parent.PropertyChanged += this.ParentEntityPropertyChanged;
}