/**
* Leaf command help.
*
* <p>This method is called if the given command line <code>args</code> calls for help on a leaf
* (i.e. commons-cli switches) node.
*
* @param exitCode the <code>System.exit</code> value to use.
* @param msg Optional error message. Null if only help is to be displayed, Message is sent to
* standard err before the help if not null.
* @param header message to be displayed pre-help.
* @param footer message to be displayed post-help.
*/
protected void help(int exitCode, String msg, String header, String footer) {
StringBuilder command = new StringBuilder(getLeadingCommandString(this));
if (commandName != null) command.append(" " + commandName);
if (exitCode != 0) {
String[] args = cliBase.getOriginalArgs();
StringBuilder sb = new StringBuilder(msg == null ? "commandline: " : msg + "\ncommandline: ");
for (int i = 0; i < args.length; i++) sb.append(" " + args[i]);
sb.append("\n");
System.err.println(sb.toString());
}
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp(
cliBase.getMaxHelpWidth(), command.toString(), header, options, footer, true);
// System.exit(exitCode);
throw new RuntimeException(getClass().getSimpleName() + " Help displayed, see logs");
}
/**
* Return Leading Command String.
*
* @param command the node to determine the path to.
* @return a <code>String</code> of the executable class and command names leading to the given
* command. Will never return null.
*/
public String getLeadingCommandString(CliCommand command) {
List<String> names = new ArrayList<String>();
while (command != null) {
command = command.getParent();
if (command != null) names.add(command.getCommandName());
}
StringBuilder sb = new StringBuilder(cliBase.getExecutableName());
int size = names.size();
for (int j = size - 1; j >= 0; j--) sb.append(" " + names.get(j));
return sb.toString();
}
/**
* Handle Configuration file.
*
* <p>The method will attempt to obtain the properties file from the reserved configuration switch
* if it is enabled. The application wide <code>Properties</code> obtained from the <code>CliBase
* </code> will be loaded with the configuration if enabled and found.
*
* <p>If the configuration switch is enabled and the <code>Properties</code> can not be loaded
* with the given file, this method will call Help with error information. Help will exit the
* application and this method will never return in this case.
*
* @return true if the configuration switch is enabled and the configuration was obtained.
* Otherwise, false is returned.
*/
public boolean handleConfiguration() {
boolean gotConfig = false;
if (cliBase.isConfigSwitch() || !cliBase.isLogToFile()) {
// if !logToFileSwitch try looking in the configuration file for configPathKey
gotConfig = true;
if (!commandline.hasOption(CliBase.ConfigurationPathShortCl)) {
gotConfig = false;
if (cliBase.isConfigSwitch() && commandline.hasOption(CliBase.HelpShortCl)) {
System.err.println(
"-"
+ CliBase.ConfigurationPathShortCl
+ " | --"
+ CliBase.ConfigurationPathLongCl
+ " required\n");
help(CliBase.ConfigNotFound, "Given configuration file not found");
}
}
if (gotConfig) {
StringBuilder sb = cliBase.getInitsb();
Properties properties = cliBase.properties;
String configPathKey = cliBase.getConfigPathKey();
String configPath = commandline.getOptionValue(CliBase.ConfigurationPathShortCl);
StrH.ttl(sb, 1, "--", CliBase.ConfigurationPathLongCl, " = ", configPath);
try {
PropertiesFile.loadFile(properties, new File(configPath));
} catch (Exception e) {
help(CliBase.ConfigNotFound, "Given configuration file not found");
}
if (configPathKey != null) {
StrH.ttl(sb, 1, configPathKey, " = ", configPath);
System.setProperty(configPathKey, configPath);
}
}
}
return gotConfig;
}
/**
* Validate the command line <code>args</code>.
*
* <p>This method will cause Help to be called if invalid command line <code>args</code> are
* given. Help exits the application and this method will never return in this case.
*
* @param commandDepth the zero based depth of this command.
* @return the <code>activeCommand</code> if the command line was valid and the requested command
* path is down my branch. Returns null otherwise.
*/
public CliCommand validateCommands(int commandDepth) {
String[] originalArgs = cliBase.getOriginalArgs();
// if no more nested commands, get this commands commons-cli CommandLine
if (commands.size() == 0) {
originalArgs = cliBase.getOriginalArgs();
if (!originalArgs[commandDepth].equals(commandName)) // -1 because CliBase holds 0th
return null;
commandDepth++;
if (commandDepth >= originalArgs.length && hasOptions()) help(0, null);
String[] myArgs = new String[originalArgs.length - commandDepth];
int j = commandDepth;
for (int i = 0; i < myArgs.length; i++) myArgs[i] = originalArgs[j++];
parseCommandLine(myArgs);
customInit();
return this;
}
String[] args = cliBase.getOriginalArgs();
if (!args[commandDepth].equals(commandName)) return null; // not my command.
if (commandDepth + 1 > args.length) commandHelp(0, null);
String arg = args[commandDepth + 1];
if (arg.equals("-" + CliBase.HelpShortCl) || arg.equals("--" + CliBase.HelpLongCl))
commandHelp(0, null);
commandDepth++;
for (Entry<String, CliCommand> entry : commands.entrySet()) {
if (entry.getKey().equals(arg)) {
CliCommand cliCommand = entry.getValue().validateCommands(commandDepth);
if (cliCommand != null) return cliCommand;
}
}
if (hasChildren()) commandHelp(CliBase.InvalidCommand, "Invalid command: " + arg);
return null;
}
void parseCommandLine(String[] args) {
// @formatter:on
CommandLineParser parser = new DefaultParser();
try {
commandline = parser.parse(options, args);
} catch (AlreadySelectedException ase) {
help(CliBase.InvalidCommandLine, "Already Selected: " + ase.getOption());
} catch (AmbiguousOptionException aoe) {
help(CliBase.InvalidCommandLine, "Ambiguous Option: " + aoe.getMatchingOptions());
} catch (MissingArgumentException mae) {
help(CliBase.InvalidCommandLine, "Missing Argument: " + mae.getOption());
} catch (MissingOptionException moe) {
help(CliBase.InvalidCommandLine, "Missing Option: " + moe.getMissingOptions());
} catch (UnrecognizedOptionException uoe) {
help(CliBase.InvalidCommandLine, "Unrecongnized Option: " + uoe.getOption());
} catch (Exception e) {
help(CliBase.InvalidCommandLine, "Unexpected Exception: " + e.getClass().getName());
}
if (commandline.hasOption(CliBase.HelpShortCl)) help(0, null);
if (commandline.hasOption(CliBase.VersionShortCl)) cliBase.version();
}
