private void collectSourceLink() {
SourceId srcId = transformation.getSourceId();
if (srcId != null) {
Source src = dataLookup.getEntity(srcId, Source.class);
if (src != null) {
collectedLinks.add(new StrongEntityLink(src, transformation));
DataLocation loc = src.getLocation();
if (loc instanceof DatabaseLocation) {
collectSourceDbLocationAndStructureLink(src);
} else if (loc instanceof LdapLocation) {
collectSourceLdapLocationAndStructureLink(src);