--- a/src/main/scala/SparqlToSql.scala	Tue Jun 15 16:11:39 2010 -0700
+++ b/src/main/scala/SparqlToSql.scala	Wed Jun 16 12:08:16 2010 -0700
@@ -169,15 +169,20 @@
    * <pre>stemURI + '/' (\w+) '/' (\w+) '.' (\w+) '#record'</pre>
    */
   def parseObjectURI(u:sparql.Uri):NodeUri = {
-    val x:String = u.s
-    val uri = new URI(x)
-    val path = uri.getPath().split("/").toList.filterNot(_ == "")
-    val subPath = path.slice(0, path.size - 2).mkString("/")
-    val rel = path(path.size - 2)
-    val attrPair = path(path.size-1).split("\\.")
-    val stem = uri.getScheme() + "://" + uri.getAuthority + "/" + subPath
-    assert("record" == uri.getFragment)
-    NodeUri(Stem(stem), Rel(rel), Attr(attrPair(0)), CellValue(attrPair(1)))
+    try {
+      val x:String = u.s
+      val uri = new URI(x)
+      val path = uri.getPath().split("/").toList.filterNot(_ == "")
+      val subPath = path.slice(0, path.size - 2).mkString("/")
+      val rel = path(path.size - 2)
+      val attrPair = path(path.size-1).split("\\.")
+      val stem = uri.getScheme() + "://" + uri.getAuthority + "/" + subPath
+      assert("record" == uri.getFragment)
+      NodeUri(Stem(stem), Rel(rel), Attr(attrPair(0)), CellValue(attrPair(1)))
+    } catch {
+      case e:java.lang.IndexOutOfBoundsException =>
+	throw new Exception("unable to parse " + u + " as an object")
+    }
   }
   /**
    * synthesize a relvar name from a SPARQL term.