/** evaluate the link function */
public static Data link(VMethod m, Object[] o) throws VisADException {
Data ans = null;
if (o != null) {
for (int i = 0; i < o.length; i++) {
// convert VRealTypes to RealTypes
if (o[i] instanceof VRealType) {
o[i] = ((VRealType) o[i]).getRealType();
}
}
}
try {
ans = (Data) FormulaUtil.invokeMethod(m.getMethod(), o);
} catch (ClassCastException exc) {
if (FormulaVar.DEBUG) exc.printStackTrace();
throw new VisADException("Link error: invalid linked method");
} catch (IllegalAccessException exc) {
if (FormulaVar.DEBUG) exc.printStackTrace();
throw new VisADException("Link error: cannot access linked method");
} catch (IllegalArgumentException exc) {
if (FormulaVar.DEBUG) exc.printStackTrace();
throw new VisADException("Link error: bad method argument");
} catch (InvocationTargetException exc) {
if (FormulaVar.DEBUG) exc.getTargetException().printStackTrace();
throw new VisADException("Link error: linked method threw an exception");
}
if (ans == null) {
throw new VisADException("Link error: linked method returned null data");
}
return ans;
}
