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1 package org.jbpm.bpel.def;
2
3 import java.util.ArrayList  ;
4 import java.util.List ;
5
6 import org.jbpm.graph.def.Transition;
7 import org.jbpm.graph.exe.ExecutionContext;
8 import org.jbpm.graph.exe.Token;
9
10 import org.jbpm.bpel.data.def.Snippet;
11 import org.jbpm.bpel.xml.util.DatatypeUtil;
12
13
19 public class Switch extends StructuredActivity {
20
21 private static final long serialVersionUID = 1L;
22
23 private List conditions;
24
25 public Switch() {
26 super();
27 conditions = new ArrayList ();
28 }
29
30 public Switch(String name) {
31 super(name);
32 conditions = new ArrayList ();
33 }
34
35 public void execute(ExecutionContext context) {
36 Transition transition = null;
37 Token token = context.getToken();
38
39 for(int i = 0, n = conditions.size(); i < n; i++ ) {
40 Activity theCase = (Activity)nodes.get(i);
41 Snippet condition = (Snippet)conditions.get(i);
42
43 if(transition == null &&
44 DatatypeUtil.toBoolean(condition.getScript().evaluate(token)).booleanValue()) {
45 transition = theCase.getDefaultArrivingTransition();
46 }
47 else {
48 theCase.setNegativeLinkStatus(token);
49 }
50 }
51 Activity otherwise = getOtherwise();
52
53 if( transition != null) {
54 getOtherwise().setNegativeLinkStatus(token);
55 }
56 else if(otherwise != null){
57 transition = getOtherwise().getDefaultArrivingTransition();
58 }
59 else {
60 transition = end.getDefaultArrivingTransition();
61 }
62
63 getStart().leave(context, transition);
64 }
65
66
68 public void attachChild(Activity activity) {
69 super.attachChild(activity);
70 conditions.add(null);
71
72 if(containsOtherwise()) {
73 int lastIndex = conditions.size();
74 nodes.add(nodes.remove(lastIndex - 1));
75 }
76 }
77
78 public void detachChild(Activity activity) {
79 int index = nodes.indexOf(activity);
80 if( index < conditions.size()) {
81 conditions.remove(index);
82 }
83
84 super.detachChild(activity);
85 }
86
87 public void reorderNode(int oldIndex, int newIndex) {
89 super.reorderNode(oldIndex, newIndex);
90
91 int otherwiseIndex = conditions.size();
93
94 if(oldIndex < otherwiseIndex && newIndex < otherwiseIndex) {
95 Object reorderedCondition = conditions.remove(oldIndex);
96 conditions.add(newIndex, reorderedCondition);
97 }
98 }
99
100
102 public void setOtherwise(Activity otherwise) {
103 int conditionCount = conditions.size();
104
105 if(nodes != null) {
106 int currentIndex = nodes.indexOf(otherwise);
107 if(currentIndex != -1) {
108 if(currentIndex != conditionCount) {
109 nodes.add(nodes.remove(currentIndex));
110 conditions.remove(currentIndex);
111 }
112 return;
113 }
114 else if(containsOtherwise()) {
115 detachChild((Activity) nodes.get(conditionCount));
116 }
117 }
118
119 super.attachChild(otherwise);
121 }
122
123 public void setCondition(Activity activity, Snippet condition) {
124 int index = nodes.indexOf(activity);
125 conditions.remove(index);
126 conditions.add(index, condition);
127 }
128
129 public Snippet getCondition(Activity activity) {
130 int index = nodes.indexOf(activity);
131 return (Snippet) conditions.get(index);
132 }
133
134 public Activity getOtherwise() {
135 return containsOtherwise() ?(Activity) nodes.get(conditions.size()) : null;
136 }
137
138 private boolean containsOtherwise() {
139 return (nodes != null && nodes.size() > conditions.size());
140 }
141
142 public List getCases() {
143 List cases = nodes;
144
145 if(containsOtherwise()) {
146 cases = new ArrayList (nodes);
147 cases.remove(conditions.size());
148 }
149
150 return cases;
151 }
152
153 List getConditions() {
155 return conditions;
156 }
157
158
159 public void accept(BpelVisitor visitor) {
160 visitor.visit(this);
161 }
162 }
163 |
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