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The Core Camel Java DSL based router
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.builder;
import java.util.Arrays;
import org.apache.camel.Exchange;
import org.apache.camel.Expression;
import org.apache.camel.Processor;
/**
* A builder of a number of different {@link Processor} implementations
*
* @version
*/
public final class ProcessorBuilder {
/**
* Utility classes should not have a public constructor.
*/
private ProcessorBuilder() {
}
/**
* Creates a processor which sets the body of the message to the value of the expression
*/
public static Processor setBody(final Expression expression) {
return new Processor() {
public void process(Exchange exchange) {
Object newBody = expression.evaluate(exchange, Object.class);
if (exchange.hasOut()) {
exchange.getOut().setBody(newBody);
} else {
exchange.getIn().setBody(newBody);
}
}
@Override
public String toString() {
return "setBody(" + expression + ")";
}
};
}
/**
* Creates a processor which sets the body of the OUT message to the value of the expression
*
* @deprecated use {@link #setBody(org.apache.camel.Expression)}
*/
@Deprecated
public static Processor setOutBody(final Expression expression) {
return new Processor() {
public void process(Exchange exchange) {
Object newBody = expression.evaluate(exchange, Object.class);
exchange.getOut().setBody(newBody);
}
@Override
public String toString() {
return "setOutBody(" + expression + ")";
}
};
}
/**
* Creates a processor which sets the body of the FAULT message to the value of the expression
*/
public static Processor setFaultBody(final Expression expression) {
return new Processor() {
public void process(Exchange exchange) {
Object newBody = expression.evaluate(exchange, Object.class);
if (exchange.hasOut()) {
exchange.getOut().setFault(true);
exchange.getOut().setBody(newBody);
} else {
exchange.getIn().setFault(true);
exchange.getIn().setBody(newBody);
}
}
@Override
public String toString() {
return "setFaultBody(" + expression + ")";
}
};
}
/**
* Sets the header on the message.
*/
public static Processor setHeader(final String name, final Expression expression) {
return new Processor() {
public void process(Exchange exchange) {
Object value = expression.evaluate(exchange, Object.class);
if (exchange.hasOut()) {
exchange.getOut().setHeader(name, value);
} else {
exchange.getIn().setHeader(name, value);
}
}
@Override
public String toString() {
return "setHeader(" + name + ", " + expression + ")";
}
};
}
/**
* Sets the header on the OUT message
*
* @deprecated use {@link #setHeader(String, org.apache.camel.Expression)}
*/
@Deprecated
public static Processor setOutHeader(final String name, final Expression expression) {
return new Processor() {
public void process(Exchange exchange) {
Object value = expression.evaluate(exchange, Object.class);
exchange.getOut().setHeader(name, value);
}
@Override
public String toString() {
return "setOutHeader(" + name + ", " + expression + ")";
}
};
}
/**
* Sets the header on the FAULT message
*/
public static Processor setFaultHeader(final String name, final Expression expression) {
return new Processor() {
public void process(Exchange exchange) {
Object value = expression.evaluate(exchange, Object.class);
if (exchange.hasOut()) {
exchange.getOut().setFault(true);
exchange.getOut().setHeader(name, value);
} else {
exchange.getIn().setFault(true);
exchange.getIn().setHeader(name, value);
}
}
@Override
public String toString() {
return "setFaultHeader(" + name + ", " + expression + ")";
}
};
}
/**
* Sets the property on the exchange
*/
public static Processor setProperty(final String name, final Expression expression) {
return new Processor() {
public void process(Exchange exchange) {
Object value = expression.evaluate(exchange, Object.class);
exchange.setProperty(name, value);
}
@Override
public String toString() {
return "setProperty(" + name + ", " + expression + ")";
}
};
}
/**
* Removes the header on the message.
*/
public static Processor removeHeader(final String name) {
return new Processor() {
public void process(Exchange exchange) {
if (exchange.hasOut()) {
exchange.getOut().removeHeader(name);
} else {
exchange.getIn().removeHeader(name);
}
}
@Override
public String toString() {
return "removeHeader(" + name + ")";
}
};
}
/**
* Removes the headers on the message
*/
public static Processor removeHeaders(final String pattern) {
return new Processor() {
public void process(Exchange exchange) {
if (exchange.hasOut()) {
exchange.getOut().removeHeaders(pattern);
} else {
exchange.getIn().removeHeaders(pattern);
}
}
@Override
public String toString() {
return "removeHeaders(" + pattern + ")";
}
};
}
/**
* Removes all headers on the message, except for the ones provided in the names parameter
*/
public static Processor removeHeaders(final String pattern, final String... exceptionPatterns) {
return new Processor() {
public void process(Exchange exchange) {
if (exchange.hasOut()) {
exchange.getOut().removeHeaders(pattern, exceptionPatterns);
} else {
exchange.getIn().removeHeaders(pattern, exceptionPatterns);
}
}
@Override
public String toString() {
return "removeHeaders(" + pattern + ", " + Arrays.toString(exceptionPatterns) + ")";
}
};
}
/**
* Removes the header on the FAULT message (FAULT must be OUT)
* @deprecated will be removed in the near future. Instead use {@link #removeHeader(String)}
*/
@Deprecated
public static Processor removeFaultHeader(final String name) {
return new Processor() {
public void process(Exchange exchange) {
exchange.getOut().setFault(true);
exchange.getOut().removeHeader(name);
}
@Override
public String toString() {
return "removeFaultHeader(" + name + ")";
}
};
}
/**
* Removes the property on the exchange
*/
public static Processor removeProperty(final String name) {
return new Processor() {
public void process(Exchange exchange) {
exchange.removeProperty(name);
}
@Override
public String toString() {
return "removeProperty(" + name + ")";
}
};
}
/**
* Removes the properties on the exchange
*/
public static Processor removeProperties(final String pattern) {
return new Processor() {
public void process(Exchange exchange) {
exchange.removeProperties(pattern);
}
@Override
public String toString() {
return "removeProperties(" + pattern + ")";
}
};
}
/**
* Removes all properties on the exchange, except for the ones provided in the names parameter
*/
public static Processor removeProperties(final String pattern, final String... exceptionPatterns) {
return new Processor() {
public void process(Exchange exchange) {
exchange.removeProperties(pattern, exceptionPatterns);
}
@Override
public String toString() {
return "removeProperties(" + pattern + ", " + Arrays.toString(exceptionPatterns) + ")";
}
};
}
/**
* Throws an exception
*/
public static Processor throwException(final Exception ex) {
return new Processor() {
public void process(Exchange exchange) throws Exception {
throw ex;
}
@Override
public String toString() {
return "throwException(" + ex.toString() + ")";
}
};
}
}