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 */ 017package org.apache.camel.impl; 018 019import org.apache.camel.DelegateProcessor; 020import org.apache.camel.Exchange; 021import org.apache.camel.Expression; 022import org.apache.camel.Processor; 023import org.apache.camel.RouteNode; 024import org.apache.camel.Traceable; 025import org.apache.camel.model.ProcessorDefinition; 026 027/** 028 * A default implementation of the {@link org.apache.camel.RouteNode} 029 * 030 * @version 031 */ 032public 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 String label = getTraceLabel(processor); 062 if (label == null) { 063 // no label then default to use the definition label 064 label = processorDefinition.getLabel(); 065 } 066 return label; 067 } 068 069 @SuppressWarnings("deprecation") 070 private String getTraceLabel(Processor target) { 071 if (target == null) { 072 return null; 073 } 074 075 if (target instanceof Traceable) { 076 Traceable trace = (Traceable) target; 077 return trace.getTraceLabel(); 078 } else if (target instanceof org.apache.camel.processor.Traceable) { 079 // to be backwards compatible 080 org.apache.camel.processor.Traceable trace = (org.apache.camel.processor.Traceable) target; 081 return trace.getTraceLabel(); 082 } 083 084 // if we are a delegate then drill down 085 if (target instanceof DelegateProcessor) { 086 return getTraceLabel(((DelegateProcessor) target).getProcessor()); 087 } 088 089 return null; 090 } 091 092 public boolean isAbstract() { 093 return processor == null; 094 } 095 096 @Override 097 public String toString() { 098 return "RouteNode[" + processorDefinition + "]"; 099 } 100}