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.DirectoryParameter;
15 import eu.svjatoslav.commons.commandline.parameterparser.parameter.FileParameter;
16 import eu.svjatoslav.commons.commandline.parameterparser.parameter.IntegerParameter;
17 import eu.svjatoslav.commons.commandline.parameterparser.parameter.NullParameter;
18 import eu.svjatoslav.commons.commandline.parameterparser.parameter.StringParameter;
22 * Single commandline parameter can have any amount of arguments.
27 private final ArrayList<Parameter> parameters = new ArrayList<Parameter>();
29 public void addParameter(final Parameter parameter) {
30 parameters.add(parameter);
33 public DirectoryParameter createDirectoryParameter(final String description) {
34 final DirectoryParameter parameter = new DirectoryParameter(description);
35 parameters.add(parameter);
39 public FileParameter createFileParameter(final String description) {
40 final FileParameter parameter = new FileParameter(description);
41 parameters.add(parameter);
45 public IntegerParameter createIntegerParameter(final String description) {
46 final IntegerParameter parameter = new IntegerParameter(description);
47 parameters.add(parameter);
51 public NullParameter createNullParameter(final String description) {
52 final NullParameter parameter = new NullParameter(description);
53 parameters.add(parameter);
57 public StringParameter createStringParameter(final String description) {
58 final StringParameter parameter = new StringParameter(description);
59 parameters.add(parameter);
64 * Return parameter by given alias or <code>null</code> if no parameter
65 * exists for given alias.
67 public Parameter getParameterByAlias(final String alias) {
69 for (final Parameter parameter : parameters)
70 if (parameter.matchesAlias(alias))
77 * @return <code>true</code> if no errors were found. <code>false</code>
80 public boolean parse(final String[] args) {
82 Parameter currentParameter = null;
84 for (final String argument : args) {
86 final Parameter parameterForAlias = getParameterByAlias(argument);
87 if (parameterForAlias == null) {
88 if (currentParameter == null) {
89 System.out.println("Unknown commandline parameter: "
94 if (!currentParameter.addArgument(argument))
98 if (currentParameter != null)
99 if (!currentParameter.noMoreArguments())
102 parameterForAlias.setParameterSpecified(true);
103 currentParameter = parameterForAlias;
108 // check if any mandatory parameters are missing
110 for (final Parameter parameter : parameters)
111 if (parameter.isMandatory() && (!parameter.isParameterSpecified())) {
112 System.out.println("Error! Mandatory parameter ("
113 + parameter.getAliases() + ") is not specified.");
120 public void showHelp() {
121 for (final Parameter parameter : parameters)
122 System.out.println(parameter.getHelp());