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1
5 package com.opensymphony.workflow.util.beanshell;
6
7 import bsh.EvalError;
8 import bsh.Interpreter;
9 import bsh.TargetError;
10
11 import com.opensymphony.module.propertyset.PropertySet;
12
13 import com.opensymphony.workflow.*;
14 import com.opensymphony.workflow.spi.WorkflowEntry;
15
16 import org.apache.commons.logging.Log;
17 import org.apache.commons.logging.LogFactory;
18
19 import java.util.Map  ;
20
21
22
28 public class BeanShellFunctionProvider implements FunctionProvider {
29
31 private static final Log log = LogFactory.getLog(BeanShellFunctionProvider.class);
32
33
35 public void execute(Map transientVars, Map args, PropertySet ps) throws WorkflowException {
36 String script = (String ) args.get(AbstractWorkflow.BSH_SCRIPT);
37 Interpreter i = null;
38 ClassLoader loader = null;
39 WorkflowContext context = (WorkflowContext) transientVars.get("context");
40 WorkflowEntry entry = (WorkflowEntry) transientVars.get("entry");
41 loader = Thread.currentThread().getContextClassLoader();
42
43 try {
44 i = new Interpreter();
45
46 if (loader != null) {
47 i.setClassLoader(loader);
48 }
49
50 i.set("entry", entry);
51 i.set("context", context);
52 i.set("transientVars", transientVars);
53 i.set("propertySet", ps);
54 } catch (EvalError evalError) {
55 String message = "Could not set values for BSH script";
56 log.error(message, evalError);
57 throw new WorkflowException(message, evalError);
58 }
59
60 try {
61 i.eval(script);
62 } catch (TargetError targetError) {
63 if (targetError.getTarget() instanceof WorkflowException) {
64 throw (WorkflowException) targetError.getTarget();
65 } else {
66 String message = "Evaluation error while running BSH function script";
67 throw new WorkflowException(message, targetError.getTarget());
68 }
69 } catch (EvalError evalError) {
70 String message = "Evaluation error while running BSH function script";
71 log.error(message, evalError);
72 throw new WorkflowException(message, evalError);
73 } finally {
74 if (loader != null) {
75 i.setClassLoader(null);
76 }
77 }
78 }
79 }
80 |
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