001/* 002 * Copyright 2006-2018 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.springframework.batch.core; 017 018import org.springframework.lang.Nullable; 019 020/** 021 * Interface for obtaining the next {@link JobParameters} in a sequence. 022 * 023 * @author Dave Syer 024 * @author Lucas Ward 025 * @author Mahmoud Ben Hassine 026 * @since 2.0 027 */ 028public interface JobParametersIncrementer { 029 030 /** 031 * Increment the provided parameters. If the input is empty, then this 032 * should return a bootstrap or initial value to be used on the first 033 * instance of a job. 034 * 035 * @param parameters the last value used 036 * @return the next value to use (never {@code null}) 037 */ 038 JobParameters getNext(@Nullable JobParameters parameters); 039 040}