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 */
017package org.apache.camel.reifier;
018
019import org.apache.camel.Processor;
020import org.apache.camel.Route;
021import org.apache.camel.Service;
022import org.apache.camel.model.PolicyDefinition;
023import org.apache.camel.model.ProcessorDefinition;
024import org.apache.camel.processor.WrapProcessor;
025import org.apache.camel.spi.Policy;
026import org.apache.camel.util.ObjectHelper;
027
028public class PolicyReifier extends AbstractPolicyReifier<PolicyDefinition> {
029
030    public PolicyReifier(Route route, ProcessorDefinition<?> definition) {
031        super(route, (PolicyDefinition) definition);
032    }
033
034    @Override
035    public Processor createProcessor() throws Exception {
036        Policy policy = resolvePolicy();
037        ObjectHelper.notNull(policy, "policy", definition);
038
039        // before wrap
040        policy.beforeWrap(route, definition);
041
042        // create processor after the before wrap
043        Processor childProcessor = this.createChildProcessor(true);
044
045        // wrap
046        Processor target = policy.wrap(route, childProcessor);
047
048        if (!(target instanceof Service)) {
049            // wrap the target so it becomes a service and we can manage its
050            // lifecycle
051            target = new WrapProcessor(target, childProcessor);
052        }
053        return target;
054    }
055
056    protected Policy resolvePolicy() {
057        return resolvePolicy(definition.getPolicy(), definition.getRef(), definition.getType());
058    }
059
060}