/// <summary>
/// If a source is tagged as polymorphic source, get the list of original source
/// </summary>
/// <param name="projDir"></param>
/// <param name="ctx"></param>
/// <param name="source"></param>
/// <param name="attrCtxParam"></param>
/// <returns></returns>
internal static Dictionary <string, List <ProjectionAttributeState> > GetPolymorphicSourceSet(
ProjectionDirective projDir,
CdmCorpusContext ctx,
CdmEntityReference source,
ResolvedAttributeSet rasSource)
{
Dictionary <string, List <ProjectionAttributeState> > polySources = new Dictionary <string, List <ProjectionAttributeState> >();
// TODO (sukanyas): when projection based polymorphic source is made available - the following line will have to be changed
// for now assuming non-projections based polymorphic source
CdmEntityDefinition sourceDef = source.FetchObjectDefinition <CdmEntityDefinition>(projDir.ResOpt);
foreach (CdmAttributeItem attr in sourceDef.Attributes)
{
if (attr.ObjectType == CdmObjectType.EntityAttributeDef)
{
// the attribute context for this entity typed attribute was already created by the `FetchResolvedAttributes` that happens before this function call.
// we are only interested in linking the attributes to the entity that they came from and the attribute context nodes should not be taken into account.
// create this dummy attribute context so the resolution code works properly and discard it after.
AttributeContextParameters attrCtxParam = new AttributeContextParameters
{
Regarding = attr,
type = CdmAttributeContextType.PassThrough,
under = new CdmAttributeContext(ctx, "discard")
};
ResolvedAttributeSet raSet = ((CdmEntityAttributeDefinition)attr).FetchResolvedAttributes(projDir.ResOpt, attrCtxParam);
foreach (ResolvedAttribute resAttr in raSet.Set)
{
// we got a null ctx because null was passed in to fetch, but the nodes are in the parent's tree
// so steal them based on name
var resAttSrc = rasSource.Get(resAttr.ResolvedName);
if (resAttSrc != null)
{
resAttr.AttCtx = resAttSrc.AttCtx;
}
ProjectionAttributeState projAttrState = new ProjectionAttributeState(ctx)
{
CurrentResolvedAttribute = resAttr,
PreviousStateList = null
};
// the key doesn't exist, initialize with an empty list first
if (!polySources.ContainsKey(resAttr.ResolvedName))
{
polySources[resAttr.ResolvedName] = new List <ProjectionAttributeState>();
}
polySources[resAttr.ResolvedName].Add(projAttrState);
}
}
}
return(polySources);
}
/// <summary>
/// If a source is tagged as polymorphic source, get the list of original source
/// </summary>
/// <param name="projDir"></param>
/// <param name="ctx"></param>
/// <param name="source"></param>
/// <param name="attrCtxParam"></param>
/// <returns></returns>
internal static Dictionary <string, List <ProjectionAttributeState> > GetPolymorphicSourceSet(
ProjectionDirective projDir,
CdmCorpusContext ctx,
CdmEntityReference source,
ResolvedAttributeSet rasSource,
AttributeContextParameters attrCtxParam)
{
Dictionary <string, List <ProjectionAttributeState> > polySources = new Dictionary <string, List <ProjectionAttributeState> >();
// TODO (sukanyas): when projection based polymorphic source is made available - the following line will have to be changed
// for now assuming non-projections based polymorphic source
CdmEntityDefinition sourceDef = source.FetchObjectDefinition <CdmEntityDefinition>(projDir.ResOpt);
foreach (CdmAttributeItem attr in sourceDef.Attributes)
{
if (attr.ObjectType == CdmObjectType.EntityAttributeDef)
{
ResolvedAttributeSet raSet = ((CdmEntityAttributeDefinition)attr).FetchResolvedAttributes(projDir.ResOpt, null);
foreach (ResolvedAttribute resAttr in raSet.Set)
{
// we got a null ctx because null was passed in to fetch, but the nodes are in the parent's tree
// so steal them based on name
var resAttSrc = rasSource.Get(resAttr.ResolvedName);
if (resAttSrc != null)
{
resAttr.AttCtx = resAttSrc.AttCtx;
}
ProjectionAttributeState projAttrState = new ProjectionAttributeState(ctx)
{
CurrentResolvedAttribute = resAttr,
PreviousStateList = null
};
// the key already exists, just add to the existing list
if (polySources.ContainsKey(resAttr.ResolvedName))
{
List <ProjectionAttributeState> exisitingSet = polySources[resAttr.ResolvedName];
exisitingSet.Add(projAttrState);
polySources[resAttr.ResolvedName] = exisitingSet;
}
else
{
List <ProjectionAttributeState> pasList = new List <ProjectionAttributeState>();
pasList.Add(projAttrState);
polySources.Add(resAttr.ResolvedName, pasList);
}
}
}
}
return(polySources);
}
