| /** |
| * 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.processor; |
| |
| import org.apache.camel.AsyncCallback; |
| import org.apache.camel.AsyncProcessor; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Expression; |
| import org.apache.camel.util.AsyncProcessorHelper; |
| |
| /** |
| * A {@link org.apache.camel.Processor} which evaluates an {@link Expression} |
| * and stores the result as a property on the {@link Exchange} with the key |
| * {@link Exchange#EVALUATE_EXPRESSION_RESULT}. |
| * <p/> |
| * This processor will in case of evaluation exceptions, set the caused exception |
| * on the {@link Exchange}. |
| */ |
| public class EvaluateExpressionProcessor implements AsyncProcessor, Traceable { |
| |
| private final Expression expression; |
| |
| public EvaluateExpressionProcessor(Expression expression) { |
| this.expression = expression; |
| } |
| |
| @Override |
| public void process(Exchange exchange) throws Exception { |
| AsyncProcessorHelper.process(this, exchange); |
| } |
| |
| @Override |
| public boolean process(Exchange exchange, AsyncCallback callback) { |
| try { |
| Object result = expression.evaluate(exchange, Object.class); |
| exchange.setProperty(Exchange.EVALUATE_EXPRESSION_RESULT, result); |
| } catch (Throwable e) { |
| exchange.setException(e); |
| } finally { |
| callback.done(true); |
| } |
| return true; |
| } |
| |
| @Override |
| public String toString() { |
| return "EvalExpression[" + expression + "]"; |
| } |
| |
| public String getTraceLabel() { |
| return "eval[" + expression + "]"; |
| } |
| |
| } |