Class VisitorImpl<R>

java.lang.Object
org.apache.calcite.linq4j.tree.VisitorImpl<R>
Type Parameters:
R - Return type
All Implemented Interfaces:
Visitor<R>

public class VisitorImpl<@Nullable R> extends Object implements Visitor<R>
Default implementation of Visitor, which traverses a tree but does nothing. In a derived class you can override selected methods.