Add classes for visitor traversal

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

diff --git a/src/main/java/org/z3950/zing/cql/CQLBooleanNode.java b/src/main/java/org/z3950/zing/cql/CQLBooleanNode.java
index 18c0bff..1b73ee7 100644 (file)
--- a/src/main/java/org/z3950/zing/cql/CQLBooleanNode.java
+++ b/src/main/java/org/z3950/zing/cql/CQLBooleanNode.java
@@ -43,6 +43,14 @@ public abstract class CQLBooleanNode extends CQLNode {
     }
 
     @Override
+    public void traverse(CQLNodeVisitor visitor) {
+      visitor.onBooleanNode(this);
+      left.traverse(visitor);
+      right.traverse(visitor);
+    }
+
+
+    @Override
     void toXCQLInternal(XCQLBuilder b, int level,
         List<CQLPrefix> prefixes, List<ModifierSet> sortkeys) {
        b.indent(level).append("<triple>\n");