Github user afs commented on a diff in the pull request: https://github.com/apache/jena/pull/237#discussion_r116365710 --- Diff: jena-arq/src/main/java/org/apache/jena/sparql/expr/NodeValue.java --- @@ -774,19 +772,10 @@ private static int compare(NodeValue nv1, NodeValue nv2, boolean sortOrderingCom } case VSPACE_SORTKEY : { - int cmp = 0; - String c1 = nv1.getCollation(); - String c2 = nv2.getCollation(); - if (c1 != null && c2 != null && c1.equals(c2)) { - // locales are parsed. Here we could think about caching if necessary - Locale desiredLocale = Locale.forLanguageTag(c1); - // collators are already stored in a concurrent map by the JVM, with <locale, softref<collator>> - Collator collator = Collator.getInstance(desiredLocale); - cmp = collator.compare(nv1.getString(), nv2.getString()); - } else { - cmp = XSDFuncOp.compareString(nv1, nv2) ; + if (!(nv1 instanceof NodeValueSortKey) || !(nv2 instanceof NodeValueSortKey)) { + raise(new ExprNotComparableException("Can't compare (not node value sort keys) "+nv1+" and "+nv2)) ; } - return cmp; + return ((NodeValueSortKey) nv1).compareTo((NodeValueSortKey) nv2); } --- End diff -- Should that be `nv1.getSortKey()`? All the NodeValues have downcast operations getXYZ().
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