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 */ 017package org.apache.camel.util.toolbox; 018 019import org.apache.camel.processor.aggregate.AggregationStrategy; 020import org.apache.camel.processor.aggregate.AggregationStrategyBeanAdapter; 021import org.apache.camel.processor.aggregate.GroupedExchangeAggregationStrategy; 022import org.apache.camel.processor.aggregate.UseLatestAggregationStrategy; 023import org.apache.camel.processor.aggregate.UseOriginalAggregationStrategy; 024 025/** 026 * Toolbox class to create commonly used Aggregation Strategies in a fluent manner. 027 * For more information about the supported {@link AggregationStrategy}, see links to the Javadocs of the relevant class below. 028 * 029 * @since 2.12 030 */ 031public final class AggregationStrategies { 032 033 private AggregationStrategies() { } 034 035 /** 036 * Creates a {@link FlexibleAggregationStrategy} pivoting around a particular type, e.g. it casts all <tt>pick expression</tt> 037 * results to the desired type. 038 * 039 * @param type The type the {@link FlexibleAggregationStrategy} deals with. 040 */ 041 public static <T> FlexibleAggregationStrategy<T> flexible(Class<T> type) { 042 return new FlexibleAggregationStrategy<T>(type); 043 } 044 045 /** 046 * Creates a {@link FlexibleAggregationStrategy} with no particular type, i.e. performing no casts or type conversion of 047 * <tt>pick expression</tt> results. 048 */ 049 public static FlexibleAggregationStrategy<Object> flexible() { 050 return new FlexibleAggregationStrategy<Object>(); 051 } 052 053 /** 054 * Use the latest incoming exchange. 055 * 056 * @see org.apache.camel.processor.aggregate.UseLatestAggregationStrategy 057 */ 058 public static AggregationStrategy useLatest() { 059 return new UseLatestAggregationStrategy(); 060 } 061 062 /** 063 * Use the original exchange. 064 * 065 * @see org.apache.camel.processor.aggregate.UseOriginalAggregationStrategy 066 */ 067 public static AggregationStrategy useOriginal() { 068 return new UseOriginalAggregationStrategy(); 069 } 070 071 /** 072 * Creates a {@link GroupedExchangeAggregationStrategy} aggregation strategy. 073 */ 074 public static AggregationStrategy groupedExchange() { 075 return new GroupedExchangeAggregationStrategy(); 076 } 077 078 /** 079 * Creates a {@link AggregationStrategyBeanAdapter} for using a POJO as the aggregation strategy. 080 */ 081 public static AggregationStrategy bean(Object bean) { 082 return new AggregationStrategyBeanAdapter(bean); 083 } 084 085 /** 086 * Creates a {@link AggregationStrategyBeanAdapter} for using a POJO as the aggregation strategy. 087 */ 088 public static AggregationStrategy bean(Object bean, String methodName) { 089 return new AggregationStrategyBeanAdapter(bean, methodName); 090 } 091 092 /** 093 * Creates a {@link AggregationStrategyBeanAdapter} for using a POJO as the aggregation strategy. 094 */ 095 public static AggregationStrategy beanAllowNull(Object bean, String methodName) { 096 AggregationStrategyBeanAdapter adapter = new AggregationStrategyBeanAdapter(bean, methodName); 097 adapter.setAllowNullOldExchange(true); 098 adapter.setAllowNullNewExchange(true); 099 return adapter; 100 } 101 102 /** 103 * Creates a {@link AggregationStrategyBeanAdapter} for using a POJO as the aggregation strategy. 104 */ 105 public static AggregationStrategy bean(Class<?> type) { 106 return new AggregationStrategyBeanAdapter(type); 107 } 108 109 /** 110 * Creates a {@link AggregationStrategyBeanAdapter} for using a POJO as the aggregation strategy. 111 */ 112 public static AggregationStrategy bean(Class<?> type, String methodName) { 113 return new AggregationStrategyBeanAdapter(type, methodName); 114 } 115 116 /** 117 * Creates a {@link AggregationStrategyBeanAdapter} for using a POJO as the aggregation strategy. 118 */ 119 public static AggregationStrategy beanAllowNull(Class<?> type, String methodName) { 120 AggregationStrategyBeanAdapter adapter = new AggregationStrategyBeanAdapter(type, methodName); 121 adapter.setAllowNullOldExchange(true); 122 adapter.setAllowNullNewExchange(true); 123 return adapter; 124 } 125 126 /** 127 * Creates a {@link XsltAggregationStrategy} as the aggregation strategy. 128 */ 129 public static XsltAggregationStrategy xslt(String xslFileLocation) { 130 return XsltAggregationStrategy.create(xslFileLocation); 131 } 132 133}