Examples with CommandException org.apache.karaf.shell.support.CommandException used on opensource projects

Example 1 with CommandException

use of org.apache.karaf.shell.support.CommandException in project karaf by apache.

the class DefaultActionPreparator method prepare.

public boolean prepare(Action action, Session session, List<Object> params) throws Exception {
    Command command = action.getClass().getAnnotation(Command.class);
    Map<Option, Field> options = new HashMap<>();
    Map<Argument, Field> arguments = new HashMap<>();
    List<Argument> orderedArguments = new ArrayList<>();
    for (Class<?> type = action.getClass(); type != null; type = type.getSuperclass()) {
        for (Field field : type.getDeclaredFields()) {
            Option option = field.getAnnotation(Option.class);
            if (option != null) {
                options.put(option, field);
            }
            Argument argument = field.getAnnotation(Argument.class);
            if (argument != null) {
                argument = replaceDefaultArgument(field, argument);
                arguments.put(argument, field);
                int index = argument.index();
                while (orderedArguments.size() <= index) {
                    orderedArguments.add(null);
                }
                if (orderedArguments.get(index) != null) {
                    throw new IllegalArgumentException("Duplicate argument index: " + index + " on Action " + action.getClass().getName());
                }
                orderedArguments.set(index, argument);
            }
        }
    }
    assertIndexesAreCorrect(action.getClass(), orderedArguments);
    String commandErrorSt = COLOR_RED + "Error executing command " + command.scope() + ":" + INTENSITY_BOLD + command.name() + INTENSITY_NORMAL + COLOR_DEFAULT + ": ";
    for (Object param : params) {
        if (HelpOption.HELP.name().equals(param)) {
            int termWidth = session.getTerminal() != null ? session.getTerminal().getWidth() : 80;
            boolean globalScope = NameScoping.isGlobalScope(session, command.scope());
            printUsage(action, options, arguments, System.out, globalScope, termWidth);
            return false;
        }
    }
    // Populate
    Map<Option, Object> optionValues = new HashMap<Option, Object>();
    Map<Argument, Object> argumentValues = new HashMap<Argument, Object>();
    boolean processOptions = true;
    int argIndex = 0;
    for (Iterator<Object> it = params.iterator(); it.hasNext(); ) {
        Object param = it.next();
        String paramValue = null;
        if (param instanceof String) {
            paramValue = (String) param;
        }
        if (param instanceof Token) {
            paramValue = param.toString();
        }
        if (processOptions && paramValue != null && paramValue.startsWith("-")) {
            boolean isKeyValuePair = paramValue.indexOf('=') != -1;
            String name;
            Object value = null;
            if (isKeyValuePair) {
                name = paramValue.substring(0, paramValue.indexOf('='));
                value = paramValue.substring(paramValue.indexOf('=') + 1);
            } else {
                name = paramValue;
            }
            Option option = null;
            for (Option opt : options.keySet()) {
                if (name.equals(opt.name()) || Arrays.asList(opt.aliases()).contains(name)) {
                    option = opt;
                    break;
                }
            }
            if (option == null) {
                throw new CommandException(commandErrorSt + "undefined option " + INTENSITY_BOLD + paramValue + INTENSITY_NORMAL + "\n" + "Try <command> --help' for more information.", "Undefined option: " + paramValue);
            }
            Field field = options.get(option);
            if (value == null && (field.getType() == boolean.class || field.getType() == Boolean.class)) {
                value = Boolean.TRUE;
            }
            if (value == null && it.hasNext()) {
                value = it.next();
            }
            if (value == null) {
                throw new CommandException(commandErrorSt + "missing value for option " + INTENSITY_BOLD + paramValue + INTENSITY_NORMAL, "Missing value for option: " + paramValue);
            }
            if (option.multiValued()) {
                @SuppressWarnings("unchecked") List<Object> l = (List<Object>) optionValues.get(option);
                if (l == null) {
                    l = new ArrayList<Object>();
                    optionValues.put(option, l);
                }
                l.add(value);
            } else {
                optionValues.put(option, value);
            }
        } else {
            processOptions = false;
            if (argIndex >= orderedArguments.size()) {
                throw new CommandException(commandErrorSt + "too many arguments specified", "Too many arguments specified");
            }
            Argument argument = orderedArguments.get(argIndex);
            if (!argument.multiValued()) {
                argIndex++;
            }
            if (argument.multiValued()) {
                @SuppressWarnings("unchecked") List<Object> l = (List<Object>) argumentValues.get(argument);
                if (l == null) {
                    l = new ArrayList<Object>();
                    argumentValues.put(argument, l);
                }
                l.add(param);
            } else {
                argumentValues.put(argument, param);
            }
        }
    }
    // Check required arguments / options
    for (Option option : options.keySet()) {
        if (option.required() && optionValues.get(option) == null) {
            throw new CommandException(commandErrorSt + "option " + INTENSITY_BOLD + option.name() + INTENSITY_NORMAL + " is required", "Option " + option.name() + " is required");
        }
    }
    for (Argument argument : orderedArguments) {
        if (argument.required() && argumentValues.get(argument) == null) {
            throw new CommandException(commandErrorSt + "argument " + INTENSITY_BOLD + argument.name() + INTENSITY_NORMAL + " is required", "Argument " + argument.name() + " is required");
        }
    }
    // Convert and inject values
    for (Map.Entry<Option, Object> entry : optionValues.entrySet()) {
        Field field = options.get(entry.getKey());
        Object value;
        try {
            value = convert(action, entry.getValue(), field.getGenericType());
        } catch (Exception e) {
            throw new CommandException(commandErrorSt + "unable to convert option " + INTENSITY_BOLD + entry.getKey().name() + INTENSITY_NORMAL + " with value '" + entry.getValue() + "' to type " + new GenericType(field.getGenericType()).toString(), "Unable to convert option " + entry.getKey().name() + " with value '" + entry.getValue() + "' to type " + new GenericType(field.getGenericType()).toString(), e);
        }
        field.setAccessible(true);
        field.set(action, value);
    }
    for (Map.Entry<Argument, Object> entry : argumentValues.entrySet()) {
        Field field = arguments.get(entry.getKey());
        Object value;
        try {
            value = convert(action, entry.getValue(), field.getGenericType());
        } catch (Exception e) {
            throw new CommandException(commandErrorSt + "unable to convert argument " + INTENSITY_BOLD + entry.getKey().name() + INTENSITY_NORMAL + " with value '" + entry.getValue() + "' to type " + new GenericType(field.getGenericType()).toString(), "Unable to convert argument " + entry.getKey().name() + " with value '" + entry.getValue() + "' to type " + new GenericType(field.getGenericType()).toString(), e);
        }
        field.setAccessible(true);
        field.set(action, value);
    }
    return true;
}

Example 2 with CommandException

use of org.apache.karaf.shell.support.CommandException in project karaf by apache.

the class HelpCommand method execute.

@Override
public Object execute(Session session, List<Object> arguments) throws Exception {
    if (arguments.contains("--help")) {
        printHelp(System.out);
        return null;
    }
    if (arguments.size() > 1) {
        String msg = COLOR_RED + "Error executing command " + INTENSITY_BOLD + getName() + INTENSITY_NORMAL + COLOR_DEFAULT + ": " + "too many arguments specified";
        throw new CommandException(msg);
    }
    String path = arguments.isEmpty() ? null : arguments.get(0) == null ? null : arguments.get(0).toString();
    String help = getHelp(session, path);
    if (help != null) {
        try (BufferedReader reader = new BufferedReader(new StringReader(help))) {
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        }
    }
    return null;
}