/// <summary>
/// See whether the AssociationEndIdentity otherEndId contains a "covering" for this
/// i.e. for each AssociationPropertyIdentity in this._propertyIdentities see whether
/// otherEndId._propertyIdentities contains a principal->dependent mapping which has
/// at least the same principal DatabaseColumns (but possibly more) _and_ at least
/// the same dependent DatabaseColumns (but possibly more).
/// This allows for treating these AssociationEndIdentity's as identical for the purposes
/// of Update Model even if a given C-side property has been mapped to more than 1 S-side property.
/// </summary>
internal bool IsCoveredBy(AssociationEndIdentity otherEndId)
{
foreach (var thisApi in _propertyIdentities)
{
var foundCoveringApi = false;
if (null != otherEndId)
{
foreach (var otherApi in otherEndId._propertyIdentities)
{
if (thisApi.IsCoveredBy(otherApi))
{
// have found an AssociationPropertyIdentity in otherEndId._propertyIdentities which covers thisApi
foundCoveringApi = true;
break;
}
}
}
if (false == foundCoveringApi)
{
// no covering AssociationPropertyIdentity was found for thisApi in
// otherEndId._propertyIdentities
return(false);
}
}
// all AssociationPropertyIdentity's in this._propertyIdentities were covered by
// AssociationPropertyIdentity's in other._propertyIdentities
return(true);
}
private void AddAssociationEndIdentity(AssociationEndIdentity assocEndIdentity)
{
if (_ends[0] == null)
{
_ends[0] = assocEndIdentity;
}
else
{
Debug.Assert(_ends[1] == null, "attempted to add more than two association ends!");
if (_ends[1] == null)
{
_ends[1] = assocEndIdentity;
}
}
}
internal static AssociationIdentity CreateAssociationIdentity(AssociationSetMapping asm)
{
var sSideEntitySet = asm.StoreEntitySet.Target as StorageEntitySet;
if (null == sSideEntitySet)
{
// a null sSideEntitySet indicates an unresolved AssociationSetMapping
// we treat this as equivalent to the AssociationSet being unmapped
return null;
}
var assocId = new AssociationIdentityForAssociationSetMapping();
assocId._assocTable = DatabaseObject.CreateFromEntitySet(sSideEntitySet);
foreach (var endProp in asm.EndProperties())
{
var assocEndId = new AssociationEndIdentity(endProp);
assocId.AddAssociationEndIdentity(assocEndId);
}
return assocId;
}
internal static AssociationIdentity CreateAssociationIdentity(AssociationSetMapping asm)
{
var sSideEntitySet = asm.StoreEntitySet.Target as StorageEntitySet;
if (null == sSideEntitySet)
{
// a null sSideEntitySet indicates an unresolved AssociationSetMapping
// we treat this as equivalent to the AssociationSet being unmapped
return(null);
}
var assocId = new AssociationIdentityForAssociationSetMapping();
assocId._assocTable = DatabaseObject.CreateFromEntitySet(sSideEntitySet);
foreach (var endProp in asm.EndProperties())
{
var assocEndId = new AssociationEndIdentity(endProp);
assocId.AddAssociationEndIdentity(assocEndId);
}
return(assocId);
}
/// <summary>
/// See whether the AssociationEndIdentity otherEndId contains a "covering" for this
/// i.e. for each AssociationPropertyIdentity in this._propertyIdentities see whether
/// otherEndId._propertyIdentities contains a principal->dependent mapping which has
/// at least the same principal DatabaseColumns (but possibly more) _and_ at least
/// the same dependent DatabaseColumns (but possibly more).
/// This allows for treating these AssociationEndIdentity's as identical for the purposes
/// of Update Model even if a given C-side property has been mapped to more than 1 S-side property.
/// </summary>
internal bool IsCoveredBy(AssociationEndIdentity otherEndId)
{
foreach (var thisApi in _propertyIdentities)
{
var foundCoveringApi = false;
if (null != otherEndId)
{
foreach (var otherApi in otherEndId._propertyIdentities)
{
if (thisApi.IsCoveredBy(otherApi))
{
// have found an AssociationPropertyIdentity in otherEndId._propertyIdentities which covers thisApi
foundCoveringApi = true;
break;
}
}
}
if (false == foundCoveringApi)
{
// no covering AssociationPropertyIdentity was found for thisApi in
// otherEndId._propertyIdentities
return false;
}
}
// all AssociationPropertyIdentity's in this._propertyIdentities were covered by
// AssociationPropertyIdentity's in other._propertyIdentities
return true;
}
private void AddAssociationEndIdentity(AssociationEndIdentity assocEndIdentity)
{
if (_ends[0] == null)
{
_ends[0] = assocEndIdentity;
}
else
{
Debug.Assert(_ends[1] == null, "attempted to add more than two association ends!");
if (_ends[1] == null)
{
_ends[1] = assocEndIdentity;
}
}
}