| /** |
| * 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.component.language; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Expression; |
| import org.apache.camel.impl.DefaultProducer; |
| import org.apache.camel.util.ObjectHelper; |
| |
| /** |
| * Language producer. |
| * |
| * @version |
| */ |
| public class LanguageProducer extends DefaultProducer { |
| |
| public LanguageProducer(LanguageEndpoint endpoint) { |
| super(endpoint); |
| } |
| |
| public void process(Exchange exchange) throws Exception { |
| // is there a custom expression in the header? |
| Expression exp = exchange.getIn().getHeader(Exchange.LANGUAGE_SCRIPT, Expression.class); |
| if (exp == null) { |
| String script = exchange.getIn().getHeader(Exchange.LANGUAGE_SCRIPT, String.class); |
| if (script != null) { |
| exp = getEndpoint().getLanguage().createExpression(script); |
| } |
| } |
| // if not fallback to use expression from endpoint |
| if (exp == null) { |
| exp = getEndpoint().getExpression(); |
| } |
| |
| ObjectHelper.notNull(exp, "expression"); |
| |
| Object result = exp.evaluate(exchange, Object.class); |
| if (log.isDebugEnabled()) { |
| log.debug("Evaluated expression as: " + result + " with: " + exchange); |
| } |
| |
| // set message body if transform is enabled |
| if (getEndpoint().isTransform()) { |
| if (exchange.hasOut()) { |
| exchange.getOut().setBody(result); |
| } else { |
| exchange.getIn().setBody(result); |
| } |
| } |
| } |
| |
| @Override |
| public LanguageEndpoint getEndpoint() { |
| return (LanguageEndpoint) super.getEndpoint(); |
| } |
| } |