/**
* Perform the 'alias' command.
*
* @param session JSwat session on which to operate.
* @param args Tokenized string of command arguments.
* @param out Output to write messages to.
*/
public void perform(Session session, CommandArguments args, Log out) {
CommandManager cmdman = (CommandManager) session.getManager(CommandManager.class);
if (args.hasMoreTokens()) {
String aliasName = args.nextToken();
if (args.hasMoreTokens()) {
// Grab rest of string as alias value.
// Be sure to preserve the quotes and escapes.
args.returnAsIs(true);
String alias = args.rest().trim();
if (alias.charAt(0) == '"' && alias.charAt(alias.length() - 1) == '"') {
// Must remove the enclosing quotes because the
// command parser doesn't handle that.
alias = alias.substring(1, alias.length() - 1);
}
// Add the command alias to the list.
cmdman.createAlias(aliasName, alias);
out.writeln(Bundle.getString("alias.defined") + ' ' + aliasName);
} else {
// One argument, show the alias definition.
String alias = cmdman.getAlias(aliasName);
if (alias == null) {
throw new CommandException(Bundle.getString("alias.undefined") + ' ' + aliasName);
} else {
out.writeln("alias " + aliasName + ' ' + alias);
}
}
} else {
// No arguments, show the defined aliases.
cmdman.listAliases();
}
} // perform
/**
* Perform the 'history' command.
*
* @param session JSwat session on which to operate.
* @param args Tokenized string of command arguments.
* @param out Output to write messages to.
*/
public void perform(Session session, CommandArguments args, Log out) {
CommandManager cmdman = (CommandManager) session.getManager(CommandManager.class);
if (args.hasMoreTokens()) {
String arg = args.nextToken();
try {
int size = Integer.parseInt(arg);
cmdman.setHistorySize(size);
out.writeln(Bundle.getString("history.sizeSet"));
} catch (NumberFormatException nfe) {
throw new CommandException(Bundle.getString("history.invalidSize"));
} catch (IllegalArgumentException iae) {
throw new CommandException(Bundle.getString("history.invalidRange"));
}
} else {
cmdman.displayHistory();
}
} // perform
/**
* Perform the 'capture' command.
*
* @param session debugging session on which to operate.
* @param args Tokenized string of command arguments.
* @param out Output to write messages to.
*/
public void perform(Session session, CommandArguments args, Log out) {
// Get the current capture settings.
boolean captureStdout = Capture.isOutputEnabled(session);
boolean captureFile = Capture.isFileEnabled(session);
String filename = Capture.getFilename(session);
if (args.hasMoreTokens()) {
// Modify the capture settings.
while (args.hasMoreTokens()) {
String token = args.nextToken();
boolean enable = false;
boolean disable = false;
if (token.startsWith("+")) {
enable = true;
token = token.substring(1);
} else if (token.startsWith("-")) {
disable = true;
token = token.substring(1);
}
if (token.equals("stdout")) {
captureStdout = enable || !disable && !captureStdout;
} else if (token.equals("file")) {
captureFile = enable || !disable && !captureFile;
if (captureFile) {
if (args.hasMoreTokens()) {
filename = args.nextToken();
} else {
throw new MissingArgumentsException(Bundle.getString("capture.missingFilename"));
}
}
} else {
throw new CommandException(Bundle.getString("capture.unknownType") + ' ' + token);
}
}
Capture.setOutputEnabled(captureStdout, session);
File file = null;
if (captureFile) {
// Create the file and check that it exists.
file = new File(filename);
if (file.exists() && !file.canWrite()) {
throw new CommandException(Bundle.getString("capture.readOnlyFile"));
}
}
// Enable or disable the file capture.
try {
Capture.setFileEnabled(captureFile, file, session);
} catch (FileNotFoundException fnfe) {
throw new CommandException(Bundle.getString("capture.fileNotFound"));
} catch (IOException ioe) {
throw new CommandException(ioe);
}
} else {
// Display the capture settings.
StringBuffer buf = new StringBuffer();
if (captureStdout) {
buf.append(Bundle.getString("capture.stdout"));
buf.append('\n');
}
if (captureFile) {
buf.append(Bundle.getString("capture.file") + ' ' + filename);
buf.append('\n');
}
if (buf.length() > 0) {
out.write(buf.toString());
} else {
out.writeln(Bundle.getString("capture.none"));
}
}
} // perform
/**
* Perform the 'hotswap' command.
*
* @param session JSwat session on which to operate.
* @param args Tokenized string of command arguments.
* @param out Output to write messages to.
*/
public void perform(Session session, CommandArguments args, Log out) {
if (!session.isActive()) {
throw new CommandException(Bundle.getString("noActiveSession"));
}
if (!args.hasMoreTokens()) {
throw new MissingArgumentsException();
}
// Name of class is required; name of .class file is optional.
String cname = args.nextToken();
String cfile = null;
if (args.hasMoreTokens()) {
cfile = args.nextToken();
}
// Find the ReferenceType for this class.
VirtualMachine vm = session.getConnection().getVM();
List classes = vm.classesByName(cname);
if (classes.size() == 0) {
throw new CommandException(Bundle.getString("hotswap.noSuchClass"));
}
ReferenceType clazz = (ReferenceType) classes.get(0);
// Did the user give us a .class file?
InputStream is = null;
if (cfile == null) {
// Try to find the .class file.
PathManager pathman = (PathManager) session.getManager(PathManager.class);
SourceSource src = pathman.mapClass(clazz);
if (src == null) {
throw new CommandException(Bundle.getString("hotswap.fileNotFound"));
}
is = src.getInputStream();
} else {
// A filename was given, just open it.
try {
is = new FileInputStream(cfile);
} catch (FileNotFoundException fnfe) {
throw new CommandException(Bundle.getString("hotswap.fileNotFound"));
}
}
// Do the actual hotswap operation.
try {
Classes.hotswap(clazz, is, vm);
out.writeln(Bundle.getString("hotswap.success"));
} catch (UnsupportedOperationException uoe) {
if (!vm.canRedefineClasses()) {
throw new CommandException(Bundle.getString("hotswap.noHotSwap"));
} else if (!vm.canAddMethod()) {
throw new CommandException(Bundle.getString("hotswap.noAddMethod"));
} else if (!vm.canUnrestrictedlyRedefineClasses()) {
throw new CommandException(Bundle.getString("hotswap.noUnrestricted"));
} else {
throw new CommandException(Bundle.getString("hotswap.unsupported"));
}
} catch (IOException ioe) {
throw new CommandException(Bundle.getString("hotswap.errorReadingFile") + ' ' + ioe);
} catch (NoClassDefFoundError ncdfe) {
throw new CommandException(Bundle.getString("hotswap.wrongClass"));
} catch (VerifyError ve) {
throw new CommandException(Bundle.getString("hotswap.verifyError") + ' ' + ve);
} catch (UnsupportedClassVersionError ucve) {
throw new CommandException(Bundle.getString("hotswap.versionError") + ' ' + ucve);
} catch (ClassFormatError cfe) {
throw new CommandException(Bundle.getString("hotswap.formatError") + ' ' + cfe);
} catch (ClassCircularityError cce) {
throw new CommandException(Bundle.getString("hotswap.circularity") + ' ' + cce);
} finally {
if (is != null) {
try {
is.close();
} catch (IOException ioe) {
}
}
}
} // perform