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 }