001/* 002 * Copyright 2017 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.item.function; 017 018import java.util.function.Function; 019 020import org.springframework.batch.item.ItemProcessor; 021import org.springframework.util.Assert; 022 023/** 024 * An {@link ItemProcessor} implementation that delegates to a {@link Function} 025 * 026 * @author Michael Minella 027 * @since 4.0 028 */ 029public class FunctionItemProcessor<I, O> implements ItemProcessor<I, O>{ 030 031 private final Function<I, O> function; 032 033 /** 034 * @param function the delegate. Must not be null 035 */ 036 public FunctionItemProcessor(Function<I, O> function) { 037 Assert.notNull(function, "A function is required"); 038 this.function = function; 039 } 040 041 @Override 042 public O process(I item) throws Exception { 043 return this.function.apply(item); 044 } 045}