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 import org.apache.camel.util.ObjectHelper;
029
030 /**
031 * Represents an XML <policy/> element
032 *
033 * @version $Revision: 751357 $
034 */
035 @XmlRootElement(name = "policy")
036 @XmlAccessorType(XmlAccessType.FIELD)
037 public class PolicyDefinition extends OutputDefinition<ProcessorDefinition> {
038 @XmlAttribute(required = true)
039 private String ref;
040 @XmlTransient
041 private Policy policy;
042
043 public PolicyDefinition() {
044 }
045
046 public PolicyDefinition(Policy policy) {
047 this.policy = policy;
048 }
049
050 @Override
051 public String toString() {
052 return "Policy[" + description() + "]";
053 }
054
055 @Override
056 public String getShortName() {
057 return "policy";
058 }
059
060 @Override
061 public String getLabel() {
062 if (ref != null) {
063 return "ref: " + ref;
064 } else if (policy != null) {
065 return policy.toString();
066 } else {
067 return "";
068 }
069 }
070
071 public String getRef() {
072 return ref;
073 }
074
075 public void setRef(String ref) {
076 this.ref = ref;
077 }
078
079 @Override
080 public Processor createProcessor(RouteContext routeContext) throws Exception {
081 Processor childProcessor = createOutputsProcessor(routeContext);
082
083 Policy policy = resolvePolicy(routeContext);
084 ObjectHelper.notNull(policy, "policy", this);
085 return policy.wrap(childProcessor);
086 }
087
088 protected Policy resolvePolicy(RouteContext routeContext) {
089 if (policy == null) {
090 policy = routeContext.lookup(getRef(), Policy.class);
091 }
092 return policy;
093 }
094
095 protected String description() {
096 if (policy != null) {
097 return policy.toString();
098 } else {
099 return "ref: " + ref;
100 }
101 }
102 }