Add classes for visitor traversal

[cql-java-moved-to-github.git] / src / main / java / org / z3950 / zing / cql / CQLRelation.java

diff --git a/src/main/java/org/z3950/zing/cql/CQLRelation.java b/src/main/java/org/z3950/zing/cql/CQLRelation.java
index 716a1e9..81fd38c 100644 (file)
--- a/src/main/java/org/z3950/zing/cql/CQLRelation.java
+++ b/src/main/java/org/z3950/zing/cql/CQLRelation.java
@@ -42,6 +42,11 @@ public class CQLRelation extends CQLNode {
     }
 
     @Override
+    public void traverse(CQLNodeVisitor visitor) {
+      visitor.onRelation(this);
+    } 
+    
+    @Override
     void toXCQLInternal(XCQLBuilder b, int level, List<CQLPrefix> prefixes,
       List<ModifierSet> sortkeys) {
        if (sortkeys != null)