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: 705880 $
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 }