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https://issues.apache.org/jira/browse/JENA-1370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16087620#comment-16087620
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Andy Seaborne edited comment on JENA-1370 at 7/14/17 5:20 PM:
--------------------------------------------------------------
See tests {{TestDelta.testTerms*}} for what is changed. {{Delta}} works purely
on term comparison via an adapter class {{PlainGraph}}.
was (Author: andy.seaborne):
See tests {{TestDelta.testTerms*}} for what is changed. {{Delta}} s=works
purely on term comparison via an adapter class {{PlainGraph}}.
> Exponent values
> ----------------
>
> Key: JENA-1370
> URL: https://issues.apache.org/jira/browse/JENA-1370
> Project: Apache Jena
> Issue Type: Bug
> Components: Jena
> Affects Versions: Jena 3.2.0
> Environment: Java 1.8, Ubuntu Linux (xenial)
> Reporter: Daan Reid
> Fix For: Jena 3.4.0
>
>
> The equality between float values appears to be not working as I expected.
> Example code:
> {code:java}
> @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");
> }
> }
> {code}
> Result:
> {noformat}
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> -------------------------------------------------------------------------------------
> <http://example.com/subject>
> <http://example.com/property> -1.700000e+00 .
> java.lang.AssertionError: !!!!!!!!!!!!!!!!!!!!!! RDF not equal
> {noformat}
> If I start with an empty graph for oldGraph, the new double value is properly
> added.
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