private static final void ensureScalaPath(Map<String, String> options, String[] cp) {
// (check if it's in the classpath)
try {
Class.forName("scala.None", false, ClassLoader.getSystemClassLoader());
} catch (ClassNotFoundException e) {
// (case: scala library not in the classpath)
if (options.containsKey(SCALA_PATH)) {
// (case: scala_path option set)
try {
String path = options.get(SCALA_PATH);
if (!(new File(path).exists())) {
System.err.println("The library strongly integrates with the Scala runtime, ");
System.err.println("however it could not find the Scala library (scala-library.jar) ");
System.err.println(
"at the path given by the command line option '" + SCALA_PATH + "': " + path);
log.exit(ExitCode.BAD_OPTION);
}
URL url = new File(path).toURI().toURL();
URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader();
Class<URLClassLoader> sysclass = URLClassLoader.class;
Method method = sysclass.getDeclaredMethod("addURL", url.getClass());
boolean savedAccessible = method.isAccessible();
method.setAccessible(true);
method.invoke(sysloader, new Object[] {url});
method.setAccessible(savedAccessible);
Class.forName("scala.None", false, ClassLoader.getSystemClassLoader());
} catch (Exception ex) {
throw log.fail(ex);
} // end try catch
} else {
// (case: we cannot find the scala library at all)
System.err.println("The library strongly integrates with the Scala runtime, ");
System.err.println(
"however it could not find the Scala library (scala-library.jar) in the classpath, ");
System.err.println("and the '" + SCALA_PATH + "' command line argument is not set.");
log.exit(ExitCode.BAD_OPTION);
}
}
options.remove(SCALA_PATH);
}
@SuppressWarnings("rawtypes")
protected static final Map<String, Field> fillOptions(
Class<?>[] classes, Map<String, String> options, boolean ensureAllOptions) {
// --Get Fillable Options
Map<String, Field> canFill = new HashMap<String, Field>();
Map<String, Marker> required = new HashMap<String, Marker>();
Map<String, String> interner = new HashMap<String, String>();
for (Class c : classes) {
Field[] fields = null;
try {
fields = c.getDeclaredFields();
} catch (Throwable e) {
log.debug(
LOG_TAG,
"Could not check fields for class: "
+ c.getName()
+ " (caused by "
+ e.getClass()
+ ": "
+ e.getMessage()
+ ")");
continue;
}
for (Field f : fields) {
Option o = f.getAnnotation(Option.class);
if (o != null) {
// (check if field is static)
if ((f.getModifiers() & Modifier.STATIC) == 0) {
log.err(LOG_TAG, "Option can only be applied to static field: " + c + "." + f);
System.exit(ExitCode.BAD_OPTION.code);
}
// (required marker)
Marker mark = null;
if (o.required()) {
mark = new Marker();
mark.unset();
}
// (add main name)
String name = o.name().toLowerCase();
if (name.equals("")) {
name = f.getName().toLowerCase();
}
if (canFill.containsKey(name)) {
String name1 =
canFill.get(name).getDeclaringClass().getCanonicalName()
+ "."
+ canFill.get(name).getName();
String name2 = f.getDeclaringClass().getCanonicalName() + "." + f.getName();
if (!name1.equals(name2)) {
log.err(
LOG_TAG,
"Multiple declarations of option " + name + ": " + name1 + " and " + name2);
System.exit(ExitCode.BAD_OPTION.code);
} else {
log.err(
LOG_TAG,
"Class is in classpath multiple times: "
+ canFill.get(name).getDeclaringClass().getCanonicalName());
}
}
canFill.put(name, f);
if (mark != null) required.put(name, mark);
interner.put(name, name);
// (add alternate names)
if (!o.alt().equals("")) {
for (String alt : o.alt().split(" *, *")) {
alt = alt.toLowerCase();
if (canFill.containsKey(alt) && !alt.equals(name))
throw new IllegalArgumentException(
"Multiple declarations of option "
+ alt
+ ": "
+ canFill.get(alt)
+ " and "
+ f);
canFill.put(alt, f);
if (mark != null) required.put(alt, mark);
interner.put(alt, name);
}
}
}
}
}
// --Fill Options
for (String key : options.keySet()) {
String rawKey = key;
key = key.toLowerCase();
// (get values)
String value = options.get(rawKey);
Field target = canFill.get(key);
// (mark required option as fulfilled)
Marker mark = required.get(key);
if (mark != null) {
mark.set();
}
// (fill the field)
if (target != null) {
// (case: declared option)
fillField(target, value);
} else if (ensureAllOptions) {
// (case: undeclared option)
// split the key
int lastDotIndex = rawKey.lastIndexOf('.');
if (lastDotIndex < 0) {
log.err(LOG_TAG, "Unrecognized option: " + key);
System.exit(ExitCode.BAD_OPTION.code);
}
String className = rawKey.substring(0, lastDotIndex);
String fieldName = rawKey.substring(lastDotIndex + 1);
// get the class
Class clazz = null;
try {
clazz = ClassLoader.getSystemClassLoader().loadClass(className);
} catch (Exception e) {
log.err(LOG_TAG, "Could not set option: " + rawKey + "; no such class: " + className);
System.exit(ExitCode.BAD_OPTION.code);
}
// get the field
try {
target = clazz.getField(fieldName);
} catch (Exception e) {
log.err(
LOG_TAG,
"Could not set option: "
+ rawKey
+ "; no such field: "
+ fieldName
+ " in class: "
+ className);
System.exit(ExitCode.BAD_OPTION.code);
}
fillField(target, value);
}
}
// --Ensure Required
boolean good = true;
for (String key : required.keySet()) {
if (!required.get(key).isSet()) {
log.err(
LOG_TAG,
"Missing required option: "
+ interner.get(key)
+ " <in class: "
+ canFill.get(key).getDeclaringClass()
+ ">");
required.get(key).set(); // don't duplicate error messages
good = false;
}
}
if (!good) {
System.exit(ExitCode.BAD_OPTION.code);
}
return canFill;
}