Add classes for visitor traversal

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

diff --git a/src/main/java/org/z3950/zing/cql/CQLPrefixNode.java b/src/main/java/org/z3950/zing/cql/CQLPrefixNode.java
index d3f6b74..2b23a6d 100644 (file)
--- a/src/main/java/org/z3950/zing/cql/CQLPrefixNode.java
+++ b/src/main/java/org/z3950/zing/cql/CQLPrefixNode.java
@@ -41,6 +41,12 @@ public class CQLPrefixNode extends CQLNode {
     }
 
     @Override
+    public void traverse(CQLNodeVisitor visitor) {
+      visitor.onPrfixNode(this);
+      subtree.traverse(visitor);
+    }
+
+    @Override
     void toXCQLInternal(XCQLBuilder b, int level, List<CQLPrefix> prefixes,
                         List<ModifierSet> sortkeys) {
        List<CQLPrefix> tmp = (prefixes == null ?