org.silentsoft.arguments.parser.ArgumentsParser Maven / Gradle / Ivy
package org.silentsoft.arguments.parser;
public class ArgumentsParser {
public enum ParsingOptions {
LEAVE_DASH_PREFIX,
CASE_SENSITIVE_SINGLE_DASH,
CASE_INSENSITIVE_SINGLE_DASH,
CASE_SENSITIVE_DOUBLE_DASH,
CASE_INSENSITIVE_DOUBLE_DASH,
REMOVE_DASH_PREFIX,
CASE_SENSITIVE,
CASE_INSENSITIVE,
}
private ArgumentsParser() { }
/**
* Supported command line arguments formats are:
*
* -a -b-key1=value1 -key2=value2-key1 value1 -key2 value2-key1=value1 value2 -key2=value3 value4-key1 value1 value2 -key2 value3 value4--a --b--key1=value1 --key2=value2--key1 value1 --key2 value2--key1=value1 value2 --key2=value3 value4--key1 value1 value2 --key2 value3 value4
*
*
* @param args
* @return
* @throws InvalidArgumentsException
*/
public static Arguments parse(String[] args) throws InvalidArgumentsException {
return parse(args, validator -> true);
}
/**
* Usage:
*
* public static void main(String[] args) throws Exception {
* ArgumentsValidator validator = (arguments) -> {
* if (arguments.containsKey("-a") && arguments.containsKey("-b")) {
* throw new InvalidArgumentsException("'-a' and '-b' cannot be exists together.");
* }
*
* return true;
* };
*
* Arguments arguments = ArgumentsParser.parse(args, validator);
* }
*
*
* @param args
* @param validator
* @return
* @throws InvalidArgumentsException
*/
public static Arguments parse(String[] args, ArgumentsValidator validator) throws InvalidArgumentsException {
Arguments arguments = new Arguments();
if (args != null) {
for (String arg : args) {
if (arg.startsWith("-")) {
if (arg.matches("(-)+")) {
throw new InvalidArgumentsException("The argument key is missing.");
}
int indexOfEqual = arg.indexOf("=");
if (indexOfEqual == -1) {
arguments.add(Argument.of(arg));
} else {
String[] pair = arg.split("=", 2);
arguments.add(Argument.of(pair[0], pair[1]));
}
} else {
if (arguments.isEmpty()) {
throw new InvalidArgumentsException("The first argument must be starts with '-' or '--'.");
}
arguments.last().getValues().add(arg);
}
}
}
if (validator != null) {
if (validator.isValid(arguments) == false) {
throw new InvalidArgumentsException();
}
}
return arguments.with(ParsingOptions.LEAVE_DASH_PREFIX, ParsingOptions.CASE_SENSITIVE_SINGLE_DASH, ParsingOptions.CASE_INSENSITIVE_DOUBLE_DASH);
}
}