[JENA-1370] Exponent values

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 3.2.0
• Fix Version/s: Jena 3.4.0
• Component/s: Jena

Environment

Java 1.8, Ubuntu Linux (xenial)

• Assignee: Andy Seaborne
• Reporter: Daan Reid
• Created: 05/Jul/17 14:02
• Updated: 21/Jul/17 09:29
• Resolved: 14/Jul/17 17:20

Description

The equality between float values appears to be not working as I expected.
Example code:

  @Test
  public void testDeltaSimple() throws Exception {
    Graph oldGraph = GraphFactory.createGraphMem();
    Graph newGraph = GraphFactory.createGraphMem();

    // oldGraph:
    // <http://example.com/subject> <http://example.com/property> -1.700000e+00 ;
    // newGraph: 
    // <http://example.com/subject> <http://example.com/property> -1.7E0 ;
    RDFDataMgr.read(oldGraph, "oldGraph.ttl");
    RDFDataMgr.read(newGraph, "newGraph.ttl");


    Delta delta = new Delta(oldGraph);
    delta.clear();
    GraphUtil.addInto(delta, newGraph);
    if (!delta.isIsomorphicWith(oldGraph)) {
      System.err.println("+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++");
      RDFDataMgr.write(System.err, delta.getAdditions(), Lang.TURTLE);
      System.err.println("-------------------------------------------------------------------------------------");
      RDFDataMgr.write(System.err, delta.getDeletions(), Lang.TURTLE);
      fail("!!!!!!!!!!!!!!!!!!!!!! RDF not equal");
    }
  }

Result:

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-------------------------------------------------------------------------------------
<http://example.com/subject>
        <http://example.com/property>  -1.700000e+00 .

java.lang.AssertionError: !!!!!!!!!!!!!!!!!!!!!! RDF not equal

If I start with an empty graph for oldGraph, the new double value is properly added.

Issue Links

• links to: GitHub Pull Request #270