| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to you under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.calcite.util; |
| |
| /** |
| * Object which can be a target for a reflective visitation (see |
| * {@link ReflectUtil#invokeVisitor(ReflectiveVisitor, Object, Class, String)}. |
| * |
| * <p>This is a tagging interface: it has no methods, and is not even required |
| * in order to use reflective visitation, but serves to advise users of the |
| * class of the intended use of the class and refer them to auxilliary classes. |
| */ |
| public interface ReflectiveVisitor { |
| } |
