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.impl.RouteContext; 027 import org.apache.camel.spi.Policy; 028 029 /** 030 * @version $Revision: 1.1 $ 031 */ 032 @XmlRootElement(name = "policy") 033 @XmlAccessorType(XmlAccessType.FIELD) 034 public class PolicyRef extends OutputType { 035 @XmlAttribute(required = true) 036 private String ref; 037 @XmlTransient 038 private Policy policy; 039 040 public PolicyRef() { 041 } 042 043 public PolicyRef(Policy policy) { 044 this.policy = policy; 045 } 046 047 @Override 048 public String toString() { 049 return "Policy[" + description() + "]"; 050 } 051 052 public String getRef() { 053 return ref; 054 } 055 056 public void setRef(String ref) { 057 this.ref = ref; 058 } 059 060 @Override 061 public Processor createProcessor(RouteContext routeContext) throws Exception { 062 Processor childProcessor = createOutputsProcessor(routeContext); 063 064 Policy policy = resolvePolicy(routeContext); 065 if (policy == null) { 066 throw new IllegalArgumentException("No policy configured: " + this); 067 } 068 return policy.wrap(childProcessor); 069 } 070 071 protected Policy resolvePolicy(RouteContext routeContext) { 072 if (policy == null) { 073 policy = routeContext.lookup(getRef(), Policy.class); 074 } 075 return policy; 076 } 077 078 protected String description() { 079 if (policy != null) { 080 return policy.toString(); 081 } else { 082 return "ref: " + ref; 083 } 084 } 085 }