/// <summary>
/// Returns a unique association name for the specified MetaAssociation
/// </summary>
/// <param name="metaAssociation">A <see cref="MetaAssociation"/>.</param>
/// <returns>A <see cref="String"/> containing the association name.</returns>
private string GetAssociationName(MetaAssociation metaAssociation)
{
lock (this._associationNameMap)
{
// We need a unique key for this association, so we use the MetaAssociation
// itself. In the case of bi-directional associations, we use the FK side.
if (!metaAssociation.IsForeignKey && metaAssociation.OtherMember != null)
{
metaAssociation = metaAssociation.OtherMember.Association;
}
string associationName = null;
if (!this._associationNameMap.TryGetValue(metaAssociation, out associationName))
{
// names are always formatted non-FK side type name followed by FK side type name
// For example, the name for both ends of the PurchaseOrder/PurchaseOrderDetail
// association will be PurchaseOrder_PurchaseOrderDetail
if (metaAssociation.IsForeignKey)
{
associationName = string.Format(CultureInfo.InvariantCulture, "{0}_{1}", metaAssociation.OtherType.Name, metaAssociation.ThisMember.DeclaringType.Name);
}
else
{
associationName = string.Format(CultureInfo.InvariantCulture, "{0}_{1}", metaAssociation.ThisMember.DeclaringType.Name, metaAssociation.OtherType.Name);
}
associationName = TypeDescriptionContextBase.MakeUniqueName(associationName, this._associationNameMap.Values);
this._associationNameMap[metaAssociation] = associationName;
}
return(associationName);
}
}
/// <summary>
/// Returns an AssociationAttribute for the specified association member
/// </summary>
/// <param name="member">The metadata member corresponding to the association member</param>
/// <returns>The Association attribute</returns>
public System.ComponentModel.DataAnnotations.AssociationAttribute CreateAssociationAttribute(MetaDataMember member)
{
MetaAssociation metaAssociation = member.Association;
string associationName = this.GetAssociationName(metaAssociation);
string thisKey = TypeDescriptionContextBase.FormatMemberList(metaAssociation.ThisKey.Select(p => p.Name));
string otherKey = TypeDescriptionContextBase.FormatMemberList(metaAssociation.OtherKey.Select(p => p.Name));
System.ComponentModel.DataAnnotations.AssociationAttribute assocAttrib = new System.ComponentModel.DataAnnotations.AssociationAttribute(associationName, thisKey, otherKey);
assocAttrib.IsForeignKey = metaAssociation.IsForeignKey;
return(assocAttrib);
}