--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/QRangeTree.java	Mon May 28 18:35:01 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/QRangeTree.java	Mon May 28 20:59:27 2012 +0000
@@ -212,6 +212,27 @@
         return root != null ? root.findQ(pos) : Double.NaN;
     }
 
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        inorder(root, sb);
+        return sb.toString();
+    }
+
+    protected static void inorder(Node node, StringBuilder sb) {
+        if (node != null) {
+            inorder(node.left, sb);
+            sb.append('[')
+              .append(node.a)
+              .append(", ")
+              .append(node.b)
+              .append(": ")
+              .append(node.q)
+              .append(']');
+            inorder(node.right, sb);
+        }
+    }
+
     private static final String name(Object o) {
         return String.valueOf(System.identityHashCode(o) & 0xffffffffL);
     }