[COMMONSRDF-15] Clarify if foreign BlankNode impls can be used with .contains() and .getTriples()

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Assignee: Stian Soiland-Reyes
• Reporter: Stian Soiland-Reyes (old) (Inactive)
• Created: 13/Apr/15 09:24
• Updated: 27/Oct/16 09:11
• Resolved: 27/Oct/16 09:11

Description

What happens if I add a 'foreign' `BlankNode` to a Graph (either directly with `Graph.add(s,t,o)` or within a foreign `Triple` to `Graph.add()` – will I be able to match using that original blank node object "later" in other calls like `.contains()` and `.getTriples()`?

This is of course straight-forward for IRI and Literal, but trickier for BlankNode.

e.g. pseudocode:

impl1 = new Impl1TermFactory();
b1 = impl1.createBlankNode();
knows = impl1.createIRI("http://xmlns.com/foaf/0.1/knows");
alice = impl1.createIRI("http://example.com/alice");

impl2 = new Impl2TermFactory();
g2 = impl2.createGraph();
g2.add(b1, knows, alice);
assertTrue(g2.contains(b1, knows, alice));

As discussed under COMMONSRDF-8 and pull request 7 https://github.com/apache/incubator-commonsrdf/pull/7

Issue Links

• is related to: COMMONSRDF-21 Remove BlankNode requirements from RDFTermFactory.createGraph()
• relates to: COMMONSRDF-8 simple .GraphImpl.add() must clone BlankNode