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1 package org.jbpm.bpel.data.exe;
2
3 import javax.xml.namespace.QName  ;
4
5 import org.w3c.dom.Node ;
6
7 import org.jbpm.bpel.data.def.VariableDefinition;
8 import org.jbpm.bpel.wsdl.def.PropertyAlias;
9 import org.jbpm.bpel.xml.util.NodeUtil;
10
11
15 public abstract class VariableInstance {
16
17 private VariableDefinition definition;
18
19 protected VariableInstance() {
20 }
21
22 public VariableDefinition getDefinition() {
23 return definition;
24 }
25
26 public void setDefinition(VariableDefinition definition) {
27 this.definition = definition;
28 }
29
30 public abstract Object getValue();
31
32 public abstract void setValue(Object value);
33
34 public abstract Object getOrCreateValue();
35
36 public Object getProperty(QName propertyName) {
37 PropertyAlias alias = definition.getTypeInfo().getPropertyAlias(propertyName);
38 if (alias == null) {
39 throw new RuntimeException ("Selection failure (property does not appear in variable's type):" +
40 " variable=" + definition.getName() + ", property=" + propertyName);
41 }
42 Object value = alias.getQuery().getScript().evaluate(getValue());
43 if (value instanceof Node ) {
44 value = NodeUtil.getValue((Node ) value);
45 }
46 return value;
47 }
48
49 public void setProperty(QName propertyName, Object value) {
50 PropertyAlias alias = definition.getTypeInfo().getPropertyAlias(propertyName);
51 if (alias == null) {
52 throw new RuntimeException ("Selection failure (property does not appear in variable's type):" +
53 " variable=" + definition.getName() + ", property=" + propertyName);
54 }
55 alias.getQuery().getScript().assign(getOrCreateValue(), value);
56 }
57 }
58 |
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