[bugfix] fn:transform resolve without a base

just yield the relative URI unchanged, we were sticking the xmldb prefix in front.

Author: alanpaxton

exist-core/src/main/java/org/exist/xquery/functions/fn/transform/URIResolution.java

@@ -51,20 +51,21 @@ public class URIResolution {
      * @return resolved URI
      * @throws URISyntaxException if resolution is not possible
      */
-    static AnyURIValue resolveURI(final AnyURIValue relative, final AnyURIValue base) throws URISyntaxException {
+    static AnyURIValue resolveURI(final AnyURIValue relative, final AnyURIValue base) throws URISyntaxException, XPathException {
         var relativeURI = new URI(relative.getStringValue());
         if (relativeURI.isAbsolute()) {
             return relative;
         }
         var baseURI = new URI(base.getStringValue() );
+        if (!baseURI.isAbsolute()) {
+            return relative;
+        }
         try {
             var xBase = XmldbURI.xmldbUriFor(baseURI);
             var resolved = xBase.getURI().resolve(relativeURI);
             return new AnyURIValue(XmldbURI.XMLDB_URI_PREFIX + resolved);
         } catch (URISyntaxException e) {
             return new AnyURIValue(baseURI.resolve(relativeURI));
-        } catch (XPathException e) {
-            throw new RuntimeException(e);
         }
     }
 

exist-core/src/test/java/org/exist/xquery/functions/fn/transform/FunTransformTest.java

@@ -56,6 +56,12 @@ void versionNumbers() throws Transform.PendingException {
         });
     }
 
+    @Test public void emptyResolution() throws XPathException, URISyntaxException {
+        var base = new AnyURIValue("");
+        var relative = new AnyURIValue("path/to/functions1.xsl");
+        assertEquals(new AnyURIValue("path/to/functions1.xsl"), URIResolution.resolveURI(relative, base));
+    }
+
     @Test public void resolution() throws XPathException, URISyntaxException {
         var base = new AnyURIValue("xmldb:exist:///db/apps/fn_transform/tei-toc2.xsl");
         var relative = new AnyURIValue("functions1.xsl");