private String doCommand(Object target, String method, String[] args) {
if (target == null) ; // System.err.println("Huh? Target should never be null " +
// domain);
else {
String cname = "_" + method.replaceAll("-", "_");
try {
Method m = target.getClass().getMethod(cname, new Class[] {String[].class});
return (String) m.invoke(target, new Object[] {args});
} catch (NoSuchMethodException e) {
// Ignore
} catch (InvocationTargetException e) {
if (e.getCause() instanceof IllegalArgumentException) {
domain.error(
"%s, for cmd: %s, arguments; %s",
e.getCause().getMessage(), method, Arrays.toString(args));
} else {
domain.warning("Exception in replace: %s", e.getCause());
e.getCause().printStackTrace();
}
} catch (Exception e) {
domain.warning("Exception in replace: " + e + " method=" + method);
e.printStackTrace();
}
}
return null;
}
public static Properties getParent(Properties p) {
try {
Field f = Properties.class.getDeclaredField("defaults");
f.setAccessible(true);
return (Properties) f.get(p);
} catch (Exception e) {
Field[] fields = Properties.class.getFields();
System.err.println(Arrays.toString(fields));
return null;
}
}
/**
* Returns compact class host.
*
* @param obj Object to compact.
* @return String.
*/
@Nullable
public static Object compactObject(Object obj) {
if (obj == null) return null;
if (obj instanceof Enum) return obj.toString();
if (obj instanceof String || obj instanceof Boolean || obj instanceof Number) return obj;
if (obj instanceof Collection) {
Collection col = (Collection) obj;
Object[] res = new Object[col.size()];
int i = 0;
for (Object elm : col) res[i++] = compactObject(elm);
return res;
}
if (obj.getClass().isArray()) {
Class<?> arrType = obj.getClass().getComponentType();
if (arrType.isPrimitive()) {
if (obj instanceof boolean[]) return Arrays.toString((boolean[]) obj);
if (obj instanceof byte[]) return Arrays.toString((byte[]) obj);
if (obj instanceof short[]) return Arrays.toString((short[]) obj);
if (obj instanceof int[]) return Arrays.toString((int[]) obj);
if (obj instanceof long[]) return Arrays.toString((long[]) obj);
if (obj instanceof float[]) return Arrays.toString((float[]) obj);
if (obj instanceof double[]) return Arrays.toString((double[]) obj);
}
Object[] arr = (Object[]) obj;
int iMax = arr.length - 1;
StringBuilder sb = new StringBuilder("[");
for (int i = 0; i <= iMax; i++) {
sb.append(compactObject(arr[i]));
if (i != iMax) sb.append(", ");
}
sb.append("]");
return sb.toString();
}
return U.compact(obj.getClass().getName());
}
/**
* Get the contents of a file.
*
* @param in
* @return
* @throws IOException
*/
public String _cat(String args[]) throws IOException {
verifyCommand(args, "${cat;<in>}, get the content of a file", null, 2, 2);
File f = domain.getFile(args[1]);
if (f.isFile()) {
return IO.collect(f);
} else if (f.isDirectory()) {
return Arrays.toString(f.list());
} else {
try {
URL url = new URL(args[1]);
return IO.collect(url, "UTF-8");
} catch (MalformedURLException mfue) {
// Ignore here
}
return null;
}
}
static void displayInfo(NetworkInterface netint) throws IOException {
inetAddresses = netint.getInterfaceAddresses();
System.out.println("some information about my link:");
System.out.printf("Display name: %s\n", netint.getDisplayName());
System.out.printf("Name: %s\n", netint.getName());
System.out.printf("Up? %s\n", netint.isUp());
System.out.printf("Loopback? %s\n", netint.isLoopback());
System.out.printf("PointToPoint? %s\n", netint.isPointToPoint());
System.out.printf("Supports multicast? %s\n", netint.supportsMulticast());
System.out.printf("Virtual? %s\n", netint.isVirtual());
System.out.printf("Hardware address: %s\n", Arrays.toString(netint.getHardwareAddress()));
System.out.printf("MTU: %s\n", netint.getMTU());
System.out.printf("\n");
System.out.println(
"my ip address is: " + ((InterfaceAddress) inetAddresses.get(0)).getAddress());
System.out.println(
"the sunnetmask address is: "
+ ((InterfaceAddress) inetAddresses.get(0)).getNetworkPrefixLength());
System.out.println("the broadcast address of this subnet is:" + bcid);
}
public String _tstamp(String args[]) {
String format = "yyyyMMddHHmm";
long now = System.currentTimeMillis();
TimeZone tz = TimeZone.getTimeZone("UTC");
if (args.length > 1) {
format = args[1];
}
if (args.length > 2) {
tz = TimeZone.getTimeZone(args[2]);
}
if (args.length > 3) {
now = Long.parseLong(args[3]);
}
if (args.length > 4) {
domain.warning("Too many arguments for tstamp: " + Arrays.toString(args));
}
SimpleDateFormat sdf = new SimpleDateFormat(format);
sdf.setTimeZone(tz);
return sdf.format(new Date(now));
}