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.bam;
018
019 import java.util.Date;
020
021 import org.apache.camel.bam.model.ActivityState;
022 import org.apache.camel.bam.model.ProcessInstance;
023 import org.apache.camel.bam.rules.ActivityRules;
024 import org.apache.camel.bam.rules.TemporalRule;
025 import org.apache.camel.util.ObjectHelper;
026
027 /**
028 * @version $Revision: $
029 */
030 public abstract class TimeExpression {
031 private ActivityRules activityRules;
032 private ActivityBuilder builder;
033 private ActivityLifecycle lifecycle;
034
035 public TimeExpression(ActivityBuilder builder, ActivityLifecycle lifecycle) {
036 this.lifecycle = lifecycle;
037 this.builder = builder;
038 this.activityRules = builder.getActivityRules();
039 }
040
041 public boolean isActivityLifecycle(ActivityRules activityRules, ActivityLifecycle lifecycle) {
042 return ObjectHelper.equals(activityRules, this.activityRules) && ObjectHelper.equals(lifecycle, this.lifecycle);
043 }
044
045 /**
046 * Creates a new temporal rule on this expression and the other expression
047 */
048 public TemporalRule after(TimeExpression expression) {
049 TemporalRule rule = new TemporalRule(expression, this);
050 rule.getSecond().getActivityRules().addRule(rule);
051 return rule;
052 }
053
054 public Date evaluate(ProcessInstance processInstance) {
055 ActivityState state = processInstance.getActivityState(activityRules);
056 if (state != null) {
057 return evaluate(processInstance, state);
058 }
059 return null;
060 }
061
062 public abstract Date evaluate(ProcessInstance instance, ActivityState state);
063
064 // Properties
065 //-------------------------------------------------------------------------
066
067 public ActivityBuilder getBuilder() {
068 return builder;
069 }
070
071 public ActivityRules getActivityRules() {
072 return activityRules;
073 }
074
075 public ActivityLifecycle getLifecycle() {
076 return lifecycle;
077 }
078
079 public ActivityState getActivityState(ProcessInstance instance) {
080 return instance.getActivityState(activityRules);
081 }
082
083 public ActivityState getOrCreateActivityState(ProcessInstance instance) {
084 return instance.getOrCreateActivityState(activityRules);
085 }
086 }