public short getAddress(String functionName) throws ProgramException {
Short address = (Short) functions.get(functionName);
if (address != null) {
return address.shortValue();
} else {
String className = functionName.substring(0, functionName.indexOf("."));
if (staticRange.get(className) == null) {
// The class is not implemented by a VM file - search for a
// built-in implementation later. Display a popup to confirm
// this as this is not a feature from the book but a later
// addition.
if (builtInAccessStatus == BUILTIN_ACCESS_UNDECIDED) {
if (hasGUI && gui.confirmBuiltInAccess()) {
builtInAccessStatus = BUILTIN_ACCESS_AUTHORIZED;
} else {
builtInAccessStatus = BUILTIN_ACCESS_DENIED;
}
}
if (builtInAccessStatus == BUILTIN_ACCESS_AUTHORIZED) {
return BUILTIN_FUNCTION_ADDRESS;
}
}
// Either:
// 1.The class is implemented by a VM file and no implementation
// for the function is found - don't override with built-in
// - or -
// 2.The user did not authorize using built-in implementations.
throw new ProgramException(
className
+ ".vm not found "
+ "or function "
+ functionName
+ " not found in "
+ className
+ ".vm");
}
}
