in shell/console/src/main/java/org/apache/karaf/shell/commands/basic/DefaultActionPreparator.java [51:210]
public boolean prepare(Action action, CommandSession session, List<Object> params) throws Exception {
ActionMetaData actionMetaData = new ActionMetaDataFactory().create(action.getClass());
Map<Option, Field> options = actionMetaData.getOptions();
Map<Argument, Field> arguments = actionMetaData.getArguments();
List<Argument> orderedArguments = actionMetaData.getOrderedArguments();
Command command2 = actionMetaData.getCommand();
if (command2 == null) {
// to avoid NPE with subshell
return true;
}
String commandErrorSt = (command2 != null) ? COLOR_RED
+ "Error executing command " + command2.scope() + ":"
+ INTENSITY_BOLD + command2.name() + INTENSITY_NORMAL
+ COLOR_DEFAULT + ": " : "";
for (Object param : params) {
if (HelpOption.HELP.name().equals(param)) {
int termWidth = getWidth(session);
boolean globalScope = NameScoping.isGlobalScope(session, actionMetaData.getCommand().scope());
actionMetaData.printUsage(action, System.out, globalScope, termWidth);
return false;
}
}
// Populate
Map<Option, Object> optionValues = new HashMap<>();
Map<Argument, Object> argumentValues = new HashMap<>();
boolean processOptions = true;
int argIndex = 0;
for (Iterator<Object> it = params.iterator(); it.hasNext(); ) {
Object param = it.next();
if (processOptions && param instanceof String && ((String) param).startsWith("-")) {
boolean isKeyValuePair = ((String) param).indexOf('=') != -1;
String name;
Object value = null;
if (isKeyValuePair) {
name = ((String) param).substring(0, ((String) param).indexOf('='));
value = ((String) param).substring(((String) param).indexOf('=') + 1);
} else {
name = (String) param;
}
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 + param + INTENSITY_NORMAL + "\n"
+ "Try <command> --help' for more information.",
"Undefined option: " + param);
}
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 + param + INTENSITY_NORMAL,
"Missing value for option: " + param
);
}
if (option.multiValued()) {
@SuppressWarnings("unchecked")
List<Object> l = (List<Object>) optionValues.get(option);
if (l == null) {
l = new ArrayList<>();
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<>();
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, session, 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, session, 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;
}