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.model.ProcessorDefinition;
024    import org.apache.camel.processor.Traceable;
025    
026    /**
027     * A default implementation of the {@link org.apache.camel.RouteNode}
028     *
029     * @version $Revision: 788766 $
030     */
031    public class DefaultRouteNode implements RouteNode {
032    
033        private Expression expression;
034        private Processor processor;
035        private ProcessorDefinition processorDefinition;
036    
037        public DefaultRouteNode(ProcessorDefinition processorDefinition, Processor processor) {
038            this.processor = processor;
039            this.processorDefinition = processorDefinition;
040        }
041    
042        public DefaultRouteNode(ProcessorDefinition processorDefinition, Expression expression) {
043            this.processorDefinition = processorDefinition;
044            this.expression = expression;
045        }
046    
047        public Processor getProcessor() {
048            return processor;
049        }
050    
051        public ProcessorDefinition getProcessorDefinition() {
052            return processorDefinition;
053        }
054    
055        public String getLabel(Exchange exchange) {
056            if (expression != null) {
057                return expression.evaluate(exchange, String.class);
058            }
059    
060            if (processor != null) {
061                if (processor instanceof Traceable) {
062                    Traceable trace = (Traceable) processor;
063                    return trace.getTraceLabel();
064                }
065                processor.toString();
066            }
067    
068            // default then to definition
069            return processorDefinition.getLabel();
070        }
071    
072        public boolean isAbstract() {
073            return processor == null;
074        }
075    
076        @Override
077        public String toString() {
078            return "RouteNode[" + processorDefinition + "]";
079        }
080    
081    }