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 }