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.model; 018 019 import javax.xml.bind.annotation.XmlAccessType; 020 import javax.xml.bind.annotation.XmlAccessorType; 021 import javax.xml.bind.annotation.XmlAttribute; 022 import javax.xml.bind.annotation.XmlRootElement; 023 import javax.xml.bind.annotation.XmlTransient; 024 025 import org.apache.camel.Processor; 026 import org.apache.camel.spi.Policy; 027 import org.apache.camel.spi.RouteContext; 028 029 /** 030 * Represents an XML <policy/> element 031 * 032 * @version $Revision: 43540 $ 033 */ 034 @XmlRootElement(name = "policy") 035 @XmlAccessorType(XmlAccessType.FIELD) 036 public class PolicyRef extends OutputType<ProcessorType> { 037 @XmlAttribute(required = true) 038 private String ref; 039 @XmlTransient 040 private Policy policy; 041 042 public PolicyRef() { 043 } 044 045 public PolicyRef(Policy policy) { 046 this.policy = policy; 047 } 048 049 @Override 050 public String toString() { 051 return "Policy[" + description() + "]"; 052 } 053 054 @Override 055 public String getShortName() { 056 return "policy"; 057 } 058 059 @Override 060 public String getLabel() { 061 if (ref != null) { 062 return "ref: " + ref; 063 } else if (policy != null) { 064 return policy.toString(); 065 } else { 066 return ""; 067 } 068 } 069 070 public String getRef() { 071 return ref; 072 } 073 074 public void setRef(String ref) { 075 this.ref = ref; 076 } 077 078 @Override 079 public Processor createProcessor(RouteContext routeContext) throws Exception { 080 Processor childProcessor = createOutputsProcessor(routeContext); 081 082 Policy policy = resolvePolicy(routeContext); 083 if (policy == null) { 084 throw new IllegalArgumentException("No policy configured: " + this); 085 } 086 return policy.wrap(childProcessor); 087 } 088 089 protected Policy resolvePolicy(RouteContext routeContext) { 090 if (policy == null) { 091 policy = routeContext.lookup(getRef(), Policy.class); 092 } 093 return policy; 094 } 095 096 protected String description() { 097 if (policy != null) { 098 return policy.toString(); 099 } else { 100 return "ref: " + ref; 101 } 102 } 103 }