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 org.apache.camel.Exchange;
020 import org.apache.camel.Expression;
021 import org.apache.camel.Processor;
022
023 /**
024 * A builder of a number of different {@link Processor} implementations
025 *
026 * @version $Revision: 1.1 $
027 */
028 public class ProcessorBuilder {
029
030 /**
031 * Utility classes should not have a public constructor.
032 */
033 private ProcessorBuilder() {
034 }
035
036 /**
037 * Creates a processor which sets the body of the IN message to the value of the expression
038 */
039 public static Processor setBody(final Expression expression) {
040 return new Processor() {
041 public void process(Exchange exchange) {
042 Object newBody = expression.evaluate(exchange);
043 exchange.getIn().setBody(newBody);
044 }
045
046 @Override
047 public String toString() {
048 return "setBody(" + expression + ")";
049 }
050 };
051 }
052
053 /**
054 * Creates a processor which sets the body of the IN message to the value of the expression
055 */
056 public static Processor setOutBody(final Expression expression) {
057 return new Processor() {
058 public void process(Exchange exchange) {
059 Object newBody = expression.evaluate(exchange);
060 exchange.getOut().setBody(newBody);
061 }
062
063 @Override
064 public String toString() {
065 return "setOutBody(" + expression + ")";
066 }
067 };
068 }
069
070 /**
071 * Sets the header on the IN message
072 */
073 public static Processor setHeader(final String name, final Expression expression) {
074 return new Processor() {
075 public void process(Exchange exchange) {
076 Object value = expression.evaluate(exchange);
077 exchange.getIn().setHeader(name, value);
078 }
079
080 @Override
081 public String toString() {
082 return "setHeader(" + name + ", " + expression + ")";
083 }
084 };
085 }
086
087 /**
088 * Sets the header on the OUT message
089 */
090 public static Processor setOutHeader(final String name, final Expression expression) {
091 return new Processor() {
092 public void process(Exchange exchange) {
093 Object value = expression.evaluate(exchange);
094 exchange.getOut().setHeader(name, value);
095 }
096
097 @Override
098 public String toString() {
099 return "setOutHeader(" + name + ", " + expression + ")";
100 }
101 };
102 }
103
104 /**
105 * Sets the property on the exchange
106 */
107 public static Processor setProperty(final String name, final Expression expression) {
108 return new Processor() {
109 public void process(Exchange exchange) {
110 Object value = expression.evaluate(exchange);
111 exchange.setProperty(name, value);
112 }
113
114 @Override
115 public String toString() {
116 return "setProperty(" + name + ", " + expression + ")";
117 }
118 };
119 }
120 }