001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel; 018 019 import java.util.List; 020 021 /** 022 * Implementations support navigating a graph where you can traverse forward and each next 023 * returns a {@link List} of outputs of type <tt>T</tt> that can contain <tt>0..n</tt> nodes. 024 * 025 * @version 026 */ 027 public interface Navigate<T> { 028 029 /** 030 * Next group of outputs 031 * 032 * @return next group or <tt>null</tt> if no more outputs 033 */ 034 List<T> next(); 035 036 /** 037 * Are there more outputs? 038 * 039 * @return <tt>true</tt> if more outputs 040 */ 041 boolean hasNext(); 042 043 }