private static ProjectionAttributeStateSet CreateNewProjectionAttributeStateSet(
ProjectionContext projCtx,
ProjectionAttributeStateSet projOutputSet,
ResolvedAttribute newResAttrFK,
string refAttrName)
{
List <ProjectionAttributeState> pasList = ProjectionResolutionCommonUtil.GetLeafList(projCtx, refAttrName);
if (pasList != null)
{
// update the new foreign key resolved attribute with trait param with reference details
ResolvedTrait reqdTrait = newResAttrFK.ResolvedTraits.Find(projCtx.ProjectionDirective.ResOpt, "is.linkedEntity.identifier");
if (reqdTrait != null)
{
CdmEntityReference traitParamEntRef = ProjectionResolutionCommonUtil.CreateForeignKeyLinkedEntityIdentifierTraitParameter(projCtx.ProjectionDirective, projOutputSet.Ctx.Corpus, pasList);
reqdTrait.ParameterValues.SetParameterValue(projCtx.ProjectionDirective.ResOpt, "entityReferences", traitParamEntRef);
}
// Create new output projection attribute state set for FK and add prevPas as previous state set
ProjectionAttributeState newProjAttrStateFK = new ProjectionAttributeState(projOutputSet.Ctx)
{
CurrentResolvedAttribute = newResAttrFK,
PreviousStateList = pasList
};
projOutputSet.Add(newProjAttrStateFK);
}
else
{
// Log error & return projOutputSet without any change
Logger.Error(TAG, projOutputSet.Ctx, $"Unable to locate state for reference attribute \"{refAttrName}\".", nameof(CreateNewProjectionAttributeStateSet));
}
return(projOutputSet);
}
private static ProjectionAttributeStateSet CreateNewProjectionAttributeStateSet(
ProjectionContext projCtx,
ProjectionAttributeStateSet projOutputSet,
ResolvedAttribute newResAttrFK,
string refAttrName)
{
List <ProjectionAttributeState> pasList = ProjectionResolutionCommonUtil.GetLeafList(projCtx, refAttrName);
string sourceEntity = projCtx.ProjectionDirective.OriginalSourceAttributeName;
if (sourceEntity == null)
{
Logger.Warning(projOutputSet.Ctx, Tag, nameof(CreateNewProjectionAttributeStateSet), null, CdmLogCode.WarnProjFKWithoutSourceEntity, refAttrName);
}
if (pasList != null)
{
// update the new foreign key resolved attribute with trait param with reference details
ResolvedTrait reqdTrait = newResAttrFK.ResolvedTraits.Find(projCtx.ProjectionDirective.ResOpt, "is.linkedEntity.identifier");
if (reqdTrait != null && sourceEntity != null)
{
CdmEntityReference traitParamEntRef = ProjectionResolutionCommonUtil.CreateForeignKeyLinkedEntityIdentifierTraitParameter(projCtx.ProjectionDirective, projOutputSet.Ctx.Corpus, pasList);
reqdTrait.ParameterValues.SetParameterValue(projCtx.ProjectionDirective.ResOpt, "entityReferences", traitParamEntRef);
}
// Create new output projection attribute state set for FK and add prevPas as previous state set
ProjectionAttributeState newProjAttrStateFK = new ProjectionAttributeState(projOutputSet.Ctx)
{
CurrentResolvedAttribute = newResAttrFK,
PreviousStateList = pasList
};
projOutputSet.Add(newProjAttrStateFK);
}
else
{
// Log error & return projOutputSet without any change
Logger.Error(projOutputSet.Ctx, Tag, nameof(CreateNewProjectionAttributeStateSet), null, CdmLogCode.ErrProjRefAttrStateFailure, refAttrName);
}
return(projOutputSet);
}
/// <inheritdoc />
internal override ProjectionAttributeStateSet AppendProjectionAttributeState(
ProjectionContext projCtx,
ProjectionAttributeStateSet projOutputSet,
CdmAttributeContext attrCtx)
{
// Create a new attribute context for the operation
AttributeContextParameters attrCtxOpCombineAttrsParam = new AttributeContextParameters
{
under = attrCtx,
type = CdmAttributeContextType.OperationCombineAttributes,
Name = $"operation/index{Index}/operationCombineAttributes"
};
CdmAttributeContext attrCtxOpCombineAttrs = CdmAttributeContext.CreateChildUnder(projCtx.ProjectionDirective.ResOpt, attrCtxOpCombineAttrsParam);
// Initialize a projection attribute context tree builder with the created attribute context for the operation
ProjectionAttributeContextTreeBuilder attrCtxTreeBuilder = new ProjectionAttributeContextTreeBuilder(attrCtxOpCombineAttrs);
// Get all the leaf level PAS nodes from the tree for each selected attribute and cache to a dictionary
Dictionary <string, List <ProjectionAttributeState> > leafLevelCombineAttributeNames = new Dictionary <string, List <ProjectionAttributeState> >();
// Also, create a single list of leaf level PAS
List <ProjectionAttributeState> leafLevelMergePASList = new List <ProjectionAttributeState>();
foreach (string select in this.Select)
{
List <ProjectionAttributeState> leafLevelListForCurrentSelect = ProjectionResolutionCommonUtil.GetLeafList(projCtx, select);
if (leafLevelListForCurrentSelect != null &&
leafLevelListForCurrentSelect.Count > 0 &&
!leafLevelCombineAttributeNames.ContainsKey(select))
{
leafLevelCombineAttributeNames.Add(select, leafLevelListForCurrentSelect);
leafLevelMergePASList.AddRange(leafLevelListForCurrentSelect);
}
}
// Create a List of top-level PAS objects that will be get merged based on the selected attributes
List <ProjectionAttributeState> pasMergeList = new List <ProjectionAttributeState>();
// Run through the top-level PAS objects
foreach (ProjectionAttributeState currentPAS in projCtx.CurrentAttributeStateSet.States)
{
if (leafLevelCombineAttributeNames.ContainsKey(currentPAS.CurrentResolvedAttribute.ResolvedName))
{
// Attribute to Merge
if (!pasMergeList.Contains(currentPAS))
{
pasMergeList.Add(currentPAS);
}
}
else
{
// Attribute to Pass Through
// Create a projection attribute state for the non-selected / pass-through attribute by creating a copy of the current state
// Copy() sets the current state as the previous state for the new one
ProjectionAttributeState newPAS = currentPAS.Copy();
projOutputSet.Add(newPAS);
}
}
if (pasMergeList.Count > 0)
{
CdmTypeAttributeDefinition mergeIntoAttribute = this.MergeInto as CdmTypeAttributeDefinition;
// the merged attribute needs one new place to live, so here it is
AttributeContextParameters mergedAttrCtxParam = new AttributeContextParameters
{
under = attrCtxOpCombineAttrs,
type = CdmAttributeContextType.AttributeDefinition,
Name = mergeIntoAttribute.GetName()
};
CdmAttributeContext mergedAttrCtx = CdmAttributeContext.CreateChildUnder(projCtx.ProjectionDirective.ResOpt, mergedAttrCtxParam);
// Create new resolved attribute, set the new attribute as target
ResolvedAttribute raNewMergeInto = CreateNewResolvedAttribute(projCtx, mergedAttrCtx, mergeIntoAttribute, null);
// Create new output projection attribute state set
ProjectionAttributeState newMergeIntoPAS = new ProjectionAttributeState(projOutputSet.Ctx)
{
CurrentResolvedAttribute = raNewMergeInto,
PreviousStateList = pasMergeList
};
// Create the attribute context parameters and just store it in the builder for now
// We will create the attribute contexts at the end
foreach (string select in leafLevelCombineAttributeNames.Keys)
{
if (leafLevelCombineAttributeNames.ContainsKey(select) &&
leafLevelCombineAttributeNames[select] != null &&
leafLevelCombineAttributeNames[select].Count > 0)
{
foreach (ProjectionAttributeState leafLevelForSelect in leafLevelCombineAttributeNames[select])
{
attrCtxTreeBuilder.CreateAndStoreAttributeContextParameters(select, leafLevelForSelect, newMergeIntoPAS.CurrentResolvedAttribute,
CdmAttributeContextType.AttributeDefinition,
leafLevelForSelect.CurrentResolvedAttribute.AttCtx, // lineage is the source att
newMergeIntoPAS.CurrentResolvedAttribute.AttCtx); // merge into points back here
}
}
}
projOutputSet.Add(newMergeIntoPAS);
}
// Create all the attribute contexts and construct the tree
attrCtxTreeBuilder.ConstructAttributeContextTree(projCtx);
return(projOutputSet);
}