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;
14 import eu.svjatoslav.commons.commandline.parameterparser.parameter.StringParameter;
18 * Single commandline parameter can have any amount of arguments.
23 private final ArrayList<Parameter> parameters = new ArrayList<Parameter>();
25 public void addParameter(final Parameter parameter) {
26 parameters.add(parameter);
29 public StringParameter createStringParameter(final String description) {
30 final StringParameter parameter = new StringParameter(description);
31 parameters.add(parameter);
36 * Return parameter by given alias or <code>null</code> if no parameter
37 * exists for given alias.
39 public Parameter getParameterByAlias(final String alias) {
41 for (final Parameter parameter : parameters)
42 if (parameter.matchesAlias(alias))
49 * @return <code>true</code> if no errors were found. <code>false</code>
52 public boolean parse(final String[] args) {
54 Parameter currentParameter = null;
56 for (final String argument : args) {
58 final Parameter parameterForAlias = getParameterByAlias(argument);
59 if (parameterForAlias == null) {
60 if (currentParameter == null) {
61 System.out.println("Unknown commandline parameter: "
66 if (!currentParameter.addArgument(argument))
70 if (currentParameter != null)
71 if (!currentParameter.noMoreArguments())
74 parameterForAlias.setParameterSpecified(true);
75 currentParameter = parameterForAlias;
80 // check if any mandatory parameters are missing
82 for (final Parameter parameter : parameters)
83 if (parameter.isMandatory() && (!parameter.isParameterSpecified())) {
84 System.out.println("Error! Mandatory parameter ("
85 + parameter.getAliases() + ") is not specified.");
92 public void showHelp() {
93 for (final Parameter parameter : parameters)
94 System.out.println(parameter.getHelp());