internal static void RegisterLinkRestriction(string fromResourceType,
int linkType,
string toResourceType,
int minCount,
int maxCount)
{
if (!_active)
{
return;
}
if (fromResourceType == null)
{
throw new ArgumentNullException("fromResourceType");
}
if (!MyPalStorage.Storage.ResourceTypes.Exist(fromResourceType))
{
throw new ArgumentException("Invalid resource type " + fromResourceType, fromResourceType);
}
if (MyPalStorage.Storage.GetPropDataType(linkType) != PropDataType.Link)
{
throw new Exception("Link restrictions may only be registered for link properties");
}
LinkRestriction lr = new LinkRestriction(
fromResourceType, toResourceType, linkType, minCount, maxCount);
if (AddResourceRestriction(lr))
{
lr.SaveToResourceStore();
}
}
public static string GetLinkResourceTypeRestriction(string fromResourceType, int linkType)
{
LinkRestriction restriction = FindLinkRestriction(fromResourceType, linkType);
if (restriction != null)
{
return(restriction.ToResourceType);
}
return(null);
}
public static int GetMaxLinkCountRestriction(string fromResourceType, int linkType)
{
LinkRestriction restriction = FindLinkRestriction(fromResourceType, linkType);
if (restriction != null)
{
return(restriction.MaxCount);
}
return(Int32.MaxValue);
}
public static int GetMinLinkCountRestriction(string fromResourceType, int linkType)
{
LinkRestriction restriction = FindLinkRestriction(fromResourceType, linkType);
if (restriction != null)
{
return(restriction.MinCount);
}
return(0);
}
public override bool Equals(object obj)
{
if (!(obj is LinkRestriction))
{
return(false);
}
LinkRestriction lr = (LinkRestriction)obj;
return(_resourceType == lr._resourceType && _propId == lr._propId);
}
public static void RegisterTypes()
{
_store = MyPalStorage.Storage;
_store.ResourceTypes.Register(LinkRestriction.RestrictionResourceType, String.Empty,
string.Empty, ResourceTypeFlags.Internal | ResourceTypeFlags.NoIndex);
_store.ResourceTypes.Register(UniqueRestriction.RestrictionResourceType, String.Empty,
string.Empty, ResourceTypeFlags.Internal | ResourceTypeFlags.NoIndex);
_store.ResourceTypes.Register(CustomRestriction.RestrictionResourceType, String.Empty,
string.Empty, ResourceTypeFlags.Internal | ResourceTypeFlags.NoIndex);
_propFromResourceType = _store.PropTypes.Register("fromResourceType", PropDataType.String, PropTypeFlags.Internal);
_propToResourceType = _store.PropTypes.Register("toResourceType", PropDataType.String, PropTypeFlags.Internal);
_propLinkType = _store.PropTypes.Register("LinkType", PropDataType.Int, PropTypeFlags.Internal);
_propUniquePropId = _store.PropTypes.Register("UniquePropId", PropDataType.Int, PropTypeFlags.Internal);
_propMinCount = _store.PropTypes.Register("MinCount", PropDataType.Int, PropTypeFlags.Internal);
_propMaxCount = _store.PropTypes.Register("MaxCount", PropDataType.Int, PropTypeFlags.Internal);
propCustomRestrictionClass = _store.PropTypes.Register("CustomRestrictionClass", PropDataType.String,
PropTypeFlags.Internal);
_restrictions = new HashMap();
_customRestrictions = new HashMap();
foreach (IResource res in _store.GetAllResources(LinkRestriction.RestrictionResourceType))
{
LinkRestriction lr = new LinkRestriction(res);
if (lr.ResourceType != null)
{
AddResourceRestriction(lr);
}
}
foreach (IResource res in _store.GetAllResources(UniqueRestriction.RestrictionResourceType))
{
UniqueRestriction restriction = new UniqueRestriction(res);
if (restriction.ResourceType != null)
{
AddResourceRestriction(restriction);
}
}
foreach (IResource res in _store.GetAllResources(CustomRestriction.RestrictionResourceType))
{
CustomRestriction restriction = new CustomRestriction(res);
if (restriction.ResourceType != null)
{
_customRestrictions [restriction.RestrictionClass] = restriction;
AddResourceRestriction(restriction);
}
}
_active = true;
}
private static LinkRestriction FindLinkRestriction(string fromResourceType, int linkType)
{
lock ( _restrictions )
{
HashSet restrictionsSet = (HashSet)_restrictions[fromResourceType];
if (restrictionsSet != null)
{
foreach (HashSet.Entry E in restrictionsSet)
{
ResourceRestriction restriction = (ResourceRestriction)E.Key;
if (restriction.PropId == linkType)
{
LinkRestriction lr = restriction as LinkRestriction;
if (lr != null)
{
return(lr);
}
}
}
}
return(null);
}
}