Index: /trunk/src/org/openstreetmap/josm/data/osm/visitor/OsmPrimitiveVisitor.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/data/osm/visitor/OsmPrimitiveVisitor.java	(revision 12810)
+++ /trunk/src/org/openstreetmap/josm/data/osm/visitor/OsmPrimitiveVisitor.java	(revision 12810)
@@ -0,0 +1,34 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.data.osm.visitor;
+
+import org.openstreetmap.josm.data.osm.Node;
+import org.openstreetmap.josm.data.osm.Relation;
+import org.openstreetmap.josm.data.osm.Way;
+
+/**
+ * Implementation of the visitor pattern for the 3 {@link org.openstreetmap.josm.data.osm.OsmPrimitive}
+ * types {@link Node}, {@link Way} and {@link Relation}.
+ * @since 12810
+ */
+public interface OsmPrimitiveVisitor {
+    /**
+     * Visiting call for points.
+     * @param n The node to inspect.
+     */
+    void visit(Node n);
+
+    /**
+     * Visiting call for lines.
+     * @param w The way to inspect.
+     * @since 64
+     */
+    void visit(Way w);
+
+    /**
+     * Visiting call for relations.
+     * @param r The relation to inspect.
+     * @since 343
+     */
+    void visit(Relation r);
+
+}