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.impl;
018    
019    import org.apache.camel.Exchange;
020    import org.apache.camel.Expression;
021    import org.apache.camel.Processor;
022    import org.apache.camel.RouteNode;
023    import org.apache.camel.management.InstrumentationProcessor;
024    import org.apache.camel.model.ProcessorDefinition;
025    import org.apache.camel.processor.Traceable;
026    
027    /**
028     * A default implementation of the {@link org.apache.camel.RouteNode}
029     *
030     * @version $Revision: 836224 $
031     */
032    public class DefaultRouteNode implements RouteNode {
033    
034        private Expression expression;
035        private Processor processor;
036        private ProcessorDefinition<?> processorDefinition;
037    
038        public DefaultRouteNode(ProcessorDefinition<?> processorDefinition, Processor processor) {
039            this.processor = processor;
040            this.processorDefinition = processorDefinition;
041        }
042    
043        public DefaultRouteNode(ProcessorDefinition<?> processorDefinition, Expression expression) {
044            this.processorDefinition = processorDefinition;
045            this.expression = expression;
046        }
047    
048        public Processor getProcessor() {
049            return processor;
050        }
051    
052        public ProcessorDefinition<?> getProcessorDefinition() {
053            return processorDefinition;
054        }
055    
056        public String getLabel(Exchange exchange) {
057            if (expression != null) {
058                return expression.evaluate(exchange, String.class);
059            }
060    
061            Processor target = processor;
062            if (target != null) {
063                // can be wrapped
064                if (target instanceof InstrumentationProcessor) {
065                    target = ((InstrumentationProcessor) target).getProcessor();
066                }
067    
068                if (target instanceof Traceable) {
069                    Traceable trace = (Traceable) target;
070                    return trace.getTraceLabel();
071                }
072            }
073    
074            // default then to definition
075            return processorDefinition.getLabel();
076        }
077    
078        public boolean isAbstract() {
079            return processor == null;
080        }
081    
082        @Override
083        public String toString() {
084            return "RouteNode[" + processorDefinition + "]";
085        }
086    }