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 */ 017 package org.apache.camel.builder; 018 019 import java.util.HashMap; 020 import java.util.Map; 021 022 import org.apache.camel.CamelContext; 023 import org.apache.camel.Exchange; 024 import org.apache.camel.ExchangePattern; 025 import org.apache.camel.Message; 026 import org.apache.camel.impl.DefaultExchange; 027 028 public final class ExchangeBuilder { 029 private CamelContext context; 030 private ExchangePattern pattern; 031 private Object body; 032 private Map<String, Object> headers = new HashMap<String, Object>(); 033 private Map<String, Object> properties = new HashMap<String, Object>(); 034 035 public ExchangeBuilder(CamelContext context) { 036 this.context = context; 037 } 038 039 /** 040 * Create the exchange by setting the camel context 041 * @param context the camel context 042 * @return exchange builder 043 */ 044 public static ExchangeBuilder anExchange(CamelContext context) { 045 return new ExchangeBuilder(context); 046 } 047 048 /** 049 * Set the in message body on the exchange 050 * @param body 051 * @return exchange builder 052 */ 053 public ExchangeBuilder withBody(Object body) { 054 this.body = body; 055 return this; 056 } 057 058 /** 059 * Set the message header of the in message on the exchange 060 * @param key the key of the header 061 * @param value the value of the header 062 * @return exchange builder 063 */ 064 public ExchangeBuilder withHeader(String key, Object value) { 065 headers.put(key, value); 066 return this; 067 } 068 069 /** 070 * Set the message exchange pattern on the exchange 071 * @param pattern exchange pattern 072 * @return exchange builder 073 */ 074 public ExchangeBuilder withPattern(ExchangePattern pattern) { 075 this.pattern = pattern; 076 return this; 077 } 078 079 /** 080 * Set the exchange property 081 * @param key the key of the exchange property 082 * @param value the value of the exchange property 083 * @return exchange builder 084 */ 085 public ExchangeBuilder withProperty(String key, Object value) { 086 properties.put(key, value); 087 return this; 088 } 089 090 /** 091 * Build up the exchange from the exchange builder 092 * @return exchange 093 */ 094 public Exchange build() { 095 Exchange exchange = new DefaultExchange(context); 096 Message message = exchange.getIn(); 097 message.setBody(body); 098 if (headers.size() > 0) { 099 message.setHeaders(headers); 100 } 101 // setup the properties on the exchange 102 for (Map.Entry<String, Object> entry : properties.entrySet()) { 103 exchange.setProperty(entry.getKey(), entry.getValue()); 104 } 105 if (pattern != null) { 106 exchange.setPattern(pattern); 107 } 108 109 return exchange; 110 } 111 }