2 * Svjatoslav Commons - shared library of common functionality.
3 * Copyright ©2012-2013, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public License
7 * as published by the Free Software Foundation.
10 package eu.svjatoslav.commons.commandline.parameterparser;
12 import java.util.ArrayList;
16 * Single commandline parameter can have any amount of arguments.
21 private final ArrayList<Parameter> parameters = new ArrayList<Parameter>();
23 public void addParameter(final Parameter parameter) {
24 parameters.add(parameter);
28 * Return parameter by given alias or <code>null</code> if no parameter
29 * exists for given alias.
31 public Parameter getParameterByAlias(final String alias) {
33 for (final Parameter parameter : parameters)
34 if (parameter.matchesAlias(alias))
41 * @return <code>true</code> if no errors were found. <code>false</code>
44 public boolean parse(final String[] args) {
46 Parameter currentParameter = null;
48 for (final String argument : args) {
50 final Parameter parameterForAlias = getParameterByAlias(argument);
51 if (parameterForAlias == null) {
52 if (currentParameter == null) {
53 System.out.println("Unknown commandline parameter: "
58 if (!currentParameter.addArgument(argument))
62 if (currentParameter != null)
63 if (!currentParameter.noMoreArguments())
66 parameterForAlias.setParameterSpecified(true);
67 currentParameter = parameterForAlias;
72 // check if any mandatory parameters are missing
74 for (final Parameter parameter : parameters)
75 if (parameter.isMandatory() && (!parameter.isParameterSpecified())) {
76 System.out.println("Error! Mandatory parameter ("
77 + parameter.getAliases() + ") is not specified.");
84 public void showHelp() {
85 for (final Parameter parameter : parameters)
86 System.out.println(parameter.getHelp());