public static CommandLineParser generateCommandLineParser(Class clazz) throws CommandLineParserException {
CommandDefinition command = (CommandDefinition) clazz.getAnnotation(CommandDefinition.class);
if(command == null)
throw new CommandLineParserException("Commands must be annotated with @CommandDefinition");
ProcessedCommand processedCommand = new ProcessedCommand(command.name(), command.description(), command.validator());
for(Field field : clazz.getDeclaredFields()) {
Option o;
OptionGroup og;
OptionList ol;
Arguments a;
if((o = field.getAnnotation(Option.class)) != null) {
OptionType optionType;
if(o.hasValue())
optionType = OptionType.NORMAL;
else
optionType = OptionType.BOOLEAN;
if(o.name() == null || o.name().length() < 1) {
processedCommand.addOption(o.shortName(), field.getName(), o.description(),
o.argument(), o.required(), ',', o.defaultValue(),
field.getType(), field.getName(), optionType, o.converter(),
o.completer(), o.validator(), o.activator(), o.renderer(), o.overrideRequired());
}
else {
processedCommand.addOption(o.shortName(), o.name(), o.description(),
o.argument(), o.required(), ',', o.defaultValue(),
field.getType(), field.getName(), optionType, o.converter(),
o.completer(), o.validator(), o.activator(), o.renderer(), o.overrideRequired());
}
}
else if((ol = field.getAnnotation(OptionList.class)) != null) {
if(!Collection.class.isAssignableFrom(field.getType()))
throw new CommandLineParserException("OptionGroup field must be instance of Collection");
Class type = Object.class;
if(field.getGenericType() != null) {
ParameterizedType listType = (ParameterizedType) field.getGenericType();
type = (Class) listType.getActualTypeArguments()[0];
}
if(ol.name() == null || ol.name().length() < 1) {
processedCommand.addOption(ol.shortName(), field.getName(), ol.description(), "",
ol.required(), ol.valueSeparator(), ol.defaultValue(), type, field.getName(), OptionType.LIST,
ol.converter(), ol.completer(), ol.validator(), ol.activator(), ol.renderer());
}
else {
processedCommand.addOption(ol.shortName(), ol.name(), ol.description(), "",
ol.required(), ol.valueSeparator(), ol.defaultValue(), type, field.getName(), OptionType.LIST,
ol.converter(), ol.completer(), ol.validator(), ol.activator(), ol.renderer());
}
}
else if((og = field.getAnnotation(OptionGroup.class)) != null) {
if(!Map.class.isAssignableFrom(field.getType()))
throw new CommandLineParserException("OptionGroup field must be instance of Map");
Class type = Object.class;
if(field.getGenericType() != null) {
ParameterizedType listType = (ParameterizedType) field.getGenericType();
type = (Class) listType.getActualTypeArguments()[1];
}
if(og.name() == null || og.name().length() < 1) {
processedCommand.addOption(og.shortName(), field.getName(), og.description(),
"", og.required(), ',', og.defaultValue(), type, field.getName(), OptionType.GROUP,
og.converter(), og.completer(), og.validator(), og.activator(), og.renderer());
}
else {
processedCommand.addOption(og.shortName(), og.name(), og.description(),
"", og.required(), ',', og.defaultValue(), type, field.getName(), OptionType.GROUP,
og.converter(), og.completer(), og.validator(), og.activator(), og.renderer());
}
}
else if((a = field.getAnnotation(Arguments.class)) != null) {
if(!Collection.class.isAssignableFrom(field.getType()))
throw new CommandLineParserException("Arguments field must be instance of Collection");
Class type = Object.class;
if(field.getGenericType() != null) {
ParameterizedType listType = (ParameterizedType) field.getGenericType();
type = (Class) listType.getActualTypeArguments()[0];
}
processedCommand.setArgument(
new ProcessedOption('\u0000',"", a.description(), "", false, a.valueSeparator(),
a.defaultValue(), type, field.getName(), OptionType.ARGUMENT, a.converter(),
a.completer(), a.validator(), null, null));
}
}