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 */ 016 017package org.springframework.batch.item.support.builder; 018 019import org.springframework.batch.item.ItemProcessor; 020import org.springframework.batch.item.support.ClassifierCompositeItemProcessor; 021import org.springframework.classify.Classifier; 022import org.springframework.util.Assert; 023 024/** 025 * Creates a fully qualified {@link ClassifierCompositeItemProcessor}. 026 * 027 * @author Glenn Renfro 028 * 029 * @since 4.0 030 */ 031public class ClassifierCompositeItemProcessorBuilder<I, O> { 032 033 private Classifier<? super I, ItemProcessor<?, ? extends O>> classifier; 034 035 /** 036 * Establishes the classifier that will determine which {@link ItemProcessor} to use. 037 * @param classifier the classifier to set 038 * @return this instance for method chaining 039 * @see ClassifierCompositeItemProcessor#setClassifier(Classifier) 040 */ 041 public ClassifierCompositeItemProcessorBuilder<I, O> classifier(Classifier<? super I, ItemProcessor<?, ? extends O>> classifier) { 042 this.classifier = classifier; 043 044 return this; 045 } 046 047 /** 048 * Returns a fully constructed {@link ClassifierCompositeItemProcessor}. 049 * 050 * @return a new {@link ClassifierCompositeItemProcessor} 051 */ 052 public ClassifierCompositeItemProcessor<I, O> build() { 053 Assert.notNull(classifier, "A classifier is required."); 054 055 ClassifierCompositeItemProcessor<I, O> processor = new ClassifierCompositeItemProcessor<>(); 056 processor.setClassifier(this.classifier); 057 return processor; 058 } 059}