/***********************************************************************************************************************
*
* Copyright (C) 2010 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed 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 eu.stratosphere.util.reflect;
/**
* A general purpose interface for the visitor pattern in tree strucures.
*
* @author Arvid Heise
*/
public interface Visitor<T> {
/**
* The callback with the current node and its distance to the (relative) root.<br>
* If this callback returns <code>false</code>, the visit of the tree is terminated.
*
* @param node
* the node
* @param distance
* the distance of the node
* @return false, if the tree should not be visited anymore
*/
boolean visited(T node, int distance);
}