protected PsmMethodAction(Class c, String m, Class[] argArray) {
// This prevents IllegalAccessExceptions when attempting to
// invoke methods on a class that is in another package and not
// defined 'public'.
if (!Modifier.isPublic(c.getModifiers())) {
throw new IllegalPsmMethodActionException("Action class must be public.");
}
try {
method = c.getMethod(m, argArray);
} catch (NoSuchMethodException ex) {
throw new IllegalPsmMethodActionException(ex.toString() + ": method " + m);
}
// Check each exception this method declares thrown. If it declares
// exceptions, and any of them are not runtime exceptions, abort.
Class[] exceptionTypes = method.getExceptionTypes();
for (int i = 0; i < exceptionTypes.length; i++) {
Class exceptionClass = exceptionTypes[i];
if (!RuntimeException.class.isAssignableFrom(exceptionClass)) {
throw new IllegalPsmMethodActionException(
"Method must not declare non-Runtime " + "exceptions.");
}
}
// Ensure that the method returns PsmEvent
if (PsmEvent.class != method.getReturnType()) {
throw new IllegalPsmMethodActionException("Method return type must be PsmEvent");
}
// Ensure that both the method is both public and static.
if (!Modifier.isStatic(method.getModifiers()) || !Modifier.isPublic(method.getModifiers())) {
throw new IllegalPsmMethodActionException("Method " + m + " must be static and public.");
}
}
Object invoke(String method, Class[] argtypes, Object[] args) throws InvocationTargetException {
try {
Method m = fact.getClass().getMethod(method, argtypes);
return m.invoke(fact, args);
} catch (NoSuchMethodException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
}
protected PsmEvent run(PsmEvent event, PsmInterp interp, Object[] argArray) {
try {
return (PsmEvent) method.invoke(null, argArray);
} catch (IllegalAccessException ex) {
// This really should never happen, given the checks at
// construction time.
throw new PsmMethodActionException(ex.toString());
} catch (InvocationTargetException ex) {
// This may occur if the method throws a runtime exception. Rather
// than wrap it in a PsmMethodActionException, let it percolate up.
// If not a RuntimeException, wrap it in a PsmMethodActionException.
Throwable th = ex.getTargetException();
if (th instanceof RuntimeException) {
throw (RuntimeException) th;
} else {
throw new PsmMethodActionException(
"Exception thrown from " + "target method invocation " + " is not a Runtime Exception",
th);
}
}
}
public String toString() {
return "[MethodAction: " + method.getName() + "]";
}
