private void VerifyHeading()
{
if (this.relation.Heading.Count != this.relation.Heading.Distinct().Count())
{
throw RelationException.FromRelation(this.relation, $"Duplicate attribute found.");
}
}
private void Validate()
{
for (int i = 0; i < this.headingMetadata.Length; i++)
{
if (this.headingMetadata[i] == null)
{
throw RelationException.FromRelation(this.relation, $"Metadata for attribute name '{this.relation.Heading[i]}' not found at index {i}.");
}
}
}
private IEnumerable <IRelationMetadata> Path(IRelationMetadata metadata)
{
IRelationMetadata origin = metadata;
while (!this.sourceMetadata.Equals(metadata) && metadata != null)
{
yield return(metadata);
metadata = metadata.Parent;
}
if (metadata == null)
{
throw RelationException.FromRelation(this.relation, $"No relationship found between '{this.sourceMetadata.Identity.Name}' and '{origin.Identity.Name}'.");
}
yield return(metadata);
}
public static NodeTree Parse(MetadataIdentity source, IRelationHeader header)
{
NodeTree tree = new NodeTree();
IRelationMetadata sourceMetadata = GetMetadata(source);
tree.Source = AddSourceNode(tree, sourceMetadata);
for (int i = 0; i < header.Degree; i++)
{
AddNode(tree, header.Attributes[i], index: i);
}
if (tree.Unreachable.Any())
{
throw RelationException.Unreachable(source, header, tree.Unreachable);
}
return(tree);
}
