/
CmmnClassDelegate.java
196 lines (169 loc) · 8.31 KB
/
CmmnClassDelegate.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
/* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.flowable.cmmn.engine.impl.delegate;
import java.util.List;
import org.flowable.cmmn.api.delegate.DelegatePlanItemInstance;
import org.flowable.cmmn.api.delegate.PlanItemJavaDelegate;
import org.flowable.cmmn.api.listener.CaseInstanceLifecycleListener;
import org.flowable.cmmn.api.listener.PlanItemInstanceLifecycleListener;
import org.flowable.cmmn.api.runtime.CaseInstance;
import org.flowable.cmmn.engine.impl.behavior.CmmnActivityBehavior;
import org.flowable.cmmn.engine.impl.behavior.CmmnTriggerableActivityBehavior;
import org.flowable.cmmn.engine.impl.behavior.impl.PlanItemJavaDelegateActivityBehavior;
import org.flowable.cmmn.engine.impl.util.CommandContextUtil;
import org.flowable.cmmn.model.FieldExtension;
import org.flowable.common.engine.api.FlowableIllegalArgumentException;
import org.flowable.common.engine.impl.el.ExpressionManager;
import org.flowable.common.engine.impl.util.ReflectUtil;
import org.flowable.task.service.delegate.DelegateTask;
import org.flowable.task.service.delegate.TaskListener;
/**
* @author Joram Barrez
*/
public class CmmnClassDelegate implements CmmnTriggerableActivityBehavior, TaskListener, PlanItemInstanceLifecycleListener, CaseInstanceLifecycleListener {
protected String sourceState;
protected String targetState;
protected String className;
protected List<FieldExtension> fieldExtensions;
protected CmmnActivityBehavior activityBehaviorInstance;
public CmmnClassDelegate(String className, List<FieldExtension> fieldExtensions) {
this.className = className;
this.fieldExtensions = fieldExtensions;
}
@Override
public void execute(DelegatePlanItemInstance planItemInstance) {
if (activityBehaviorInstance == null) {
activityBehaviorInstance = getCmmnActivityBehavior(className);
}
activityBehaviorInstance.execute(planItemInstance);
}
@Override
public void trigger(DelegatePlanItemInstance planItemInstance) {
if (activityBehaviorInstance == null) {
activityBehaviorInstance = getCmmnActivityBehavior(className);
}
if (!(activityBehaviorInstance instanceof CmmnTriggerableActivityBehavior)) {
throw new FlowableIllegalArgumentException(className + " does not implement the "
+ CmmnTriggerableActivityBehavior.class + " interface");
}
((CmmnTriggerableActivityBehavior) activityBehaviorInstance).trigger(planItemInstance);
}
protected CmmnActivityBehavior getCmmnActivityBehavior(String className) {
Object instance = instantiate(className);
applyFieldExtensions(fieldExtensions, instance, false);
if (instance instanceof PlanItemJavaDelegate) {
return new PlanItemJavaDelegateActivityBehavior((PlanItemJavaDelegate) instance);
} else if (instance instanceof CmmnTriggerableActivityBehavior) {
return (CmmnTriggerableActivityBehavior) instance;
} else if (instance instanceof CmmnActivityBehavior) {
return (CmmnActivityBehavior) instance;
} else {
throw new FlowableIllegalArgumentException(className + " does not implement the "
+ CmmnActivityBehavior.class + " nor the " + PlanItemJavaDelegate.class + " interface");
}
}
@Override
public void notify(DelegateTask delegateTask) {
TaskListener taskListenerInstance = getTaskListenerInstance(delegateTask);
taskListenerInstance.notify(delegateTask);
}
protected TaskListener getTaskListenerInstance(DelegateTask delegateTask) {
Object delegateInstance = instantiate(className);
applyFieldExtensions(fieldExtensions, delegateTask, false);
if (delegateInstance instanceof TaskListener) {
return (TaskListener) delegateInstance;
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + TaskListener.class);
}
}
@Override
public void stateChanged(DelegatePlanItemInstance planItemInstance, String oldState, String newState) {
PlanItemInstanceLifecycleListener planItemLifeCycleListenerInstance = getPlanItemLifeCycleListenerInstance();
planItemLifeCycleListenerInstance.stateChanged(planItemInstance, oldState, newState);
}
@Override
public void stateChanged(CaseInstance caseInstance, String oldState, String newState) {
CaseInstanceLifecycleListener caseLifeCycleListenerInstance = getCaseLifeCycleListenerInstance();
caseLifeCycleListenerInstance.stateChanged(caseInstance, oldState, newState);
}
protected PlanItemInstanceLifecycleListener getPlanItemLifeCycleListenerInstance() {
Object delegateInstance = instantiate(className);
applyFieldExtensions(fieldExtensions, delegateInstance, false);
if (delegateInstance instanceof PlanItemInstanceLifecycleListener) {
return (PlanItemInstanceLifecycleListener) delegateInstance;
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + PlanItemInstanceLifecycleListener.class);
}
}
protected CaseInstanceLifecycleListener getCaseLifeCycleListenerInstance() {
Object delegateInstance = instantiate(className);
applyFieldExtensions(fieldExtensions, delegateInstance, false);
if (delegateInstance instanceof CaseInstanceLifecycleListener) {
return (CaseInstanceLifecycleListener) delegateInstance;
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + CaseInstanceLifecycleListener.class);
}
}
protected Object instantiate(String className) {
return ReflectUtil.instantiate(className);
}
public static void applyFieldExtensions(List<FieldExtension> fieldExtensions, Object target, boolean throwExceptionOnMissingField) {
if (fieldExtensions != null) {
for (FieldExtension fieldExtension : fieldExtensions) {
applyFieldExtension(fieldExtension, target, throwExceptionOnMissingField);
}
}
}
protected static void applyFieldExtension(FieldExtension fieldExtension, Object target, boolean throwExceptionOnMissingField) {
Object value = null;
if (fieldExtension.getStringValue() != null) {
value = fieldExtension.getStringValue();
} else if (fieldExtension.getExpression() != null) {
ExpressionManager expressionManager = CommandContextUtil.getCmmnEngineConfiguration().getExpressionManager();
value = expressionManager.createExpression(fieldExtension.getExpression());
}
ReflectUtil.invokeSetterOrField(target, fieldExtension.getFieldName(), value, throwExceptionOnMissingField);
}
@Override
public String getSourceState() {
return sourceState;
}
public void setSourceState(String sourceState) {
this.sourceState = sourceState;
}
@Override
public String getTargetState() {
return targetState;
}
public void setTargetState(String targetState) {
this.targetState = targetState;
}
public String getClassName() {
return className;
}
public void setClassName(String className) {
this.className = className;
}
public List<FieldExtension> getFieldExtensions() {
return fieldExtensions;
}
public void setFieldExtensions(List<FieldExtension> fieldExtensions) {
this.fieldExtensions = fieldExtensions;
}
public CmmnActivityBehavior getActivityBehaviorInstance() {
return activityBehaviorInstance;
}
public void setActivityBehaviorInstance(CmmnActivityBehavior activityBehaviorInstance) {
this.activityBehaviorInstance = activityBehaviorInstance;
}
}