001/* 002 * Copyright 2006-2007 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.sample.domain.order.internal; 018 019import java.util.Map; 020 021import org.springframework.batch.item.file.transform.LineAggregator; 022import org.springframework.batch.sample.domain.order.LineItem; 023import org.springframework.batch.sample.domain.order.Order; 024 025/** 026 * Converts <code>Order</code> object to a list of strings. 027 * 028 * @author Dave Syer 029 * @author Dan Garrette 030 */ 031public class OrderLineAggregator implements LineAggregator<Order> { 032 033 private static final String LINE_SEPARATOR = System.getProperty("line.separator"); 034 035 private Map<String, LineAggregator<Object>> aggregators; 036 037 @Override 038 public String aggregate(Order order) { 039 StringBuilder result = new StringBuilder(); 040 041 result.append(aggregators.get("header").aggregate(order) + LINE_SEPARATOR); 042 result.append(aggregators.get("customer").aggregate(order) + LINE_SEPARATOR); 043 result.append(aggregators.get("address").aggregate(order) + LINE_SEPARATOR); 044 result.append(aggregators.get("billing").aggregate(order) + LINE_SEPARATOR); 045 046 for (LineItem lineItem : order.getLineItems()) { 047 result.append(aggregators.get("item").aggregate(lineItem) + LINE_SEPARATOR); 048 } 049 050 result.append(aggregators.get("footer").aggregate(order)); 051 052 return result.toString(); 053 } 054 055 /** 056 * Set aggregators for all types of lines in the output file 057 * 058 * @param aggregators Map of LineAggregators used to map the various record types for 059 * each order 060 */ 061 public void setAggregators(Map<String, LineAggregator<Object>> aggregators) { 062 this.aggregators = aggregators; 063 } 064 065}