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.StringParameter;
21 * Single commandline parameter can have any amount of arguments.
26 private final ArrayList<Parameter> parameters = new ArrayList<Parameter>();
28 public void addParameter(final Parameter parameter) {
29 parameters.add(parameter);
32 public DirectoryParameter createDirectoryParameter(final String description) {
33 final DirectoryParameter parameter = new DirectoryParameter(description);
34 parameters.add(parameter);
38 public FileParameter createFileParameter(final String description) {
39 final FileParameter parameter = new FileParameter(description);
40 parameters.add(parameter);
44 public IntegerParameter createIntegerParameter(final String description) {
45 final IntegerParameter parameter = new IntegerParameter(description);
46 parameters.add(parameter);
50 public StringParameter createStringParameter(final String description) {
51 final StringParameter parameter = new StringParameter(description);
52 parameters.add(parameter);
57 * Return parameter by given alias or <code>null</code> if no parameter
58 * exists for given alias.
60 public Parameter getParameterByAlias(final String alias) {
62 for (final Parameter parameter : parameters)
63 if (parameter.matchesAlias(alias))
70 * @return <code>true</code> if no errors were found. <code>false</code>
73 public boolean parse(final String[] args) {
75 Parameter currentParameter = null;
77 for (final String argument : args) {
79 final Parameter parameterForAlias = getParameterByAlias(argument);
80 if (parameterForAlias == null) {
81 if (currentParameter == null) {
82 System.out.println("Unknown commandline parameter: "
87 if (!currentParameter.addArgument(argument))
91 if (currentParameter != null)
92 if (!currentParameter.noMoreArguments())
95 parameterForAlias.setParameterSpecified(true);
96 currentParameter = parameterForAlias;
101 // check if any mandatory parameters are missing
103 for (final Parameter parameter : parameters)
104 if (parameter.isMandatory() && (!parameter.isParameterSpecified())) {
105 System.out.println("Error! Mandatory parameter ("
106 + parameter.getAliases() + ") is not specified.");
113 public void showHelp() {
114 for (final Parameter parameter : parameters)
115 System.out.println(parameter.getHelp());