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;
13 import java.util.ArrayList;
14 import java.util.List;
16 public class Parameter {
19 * Indicates that at least one argument is mandatory for this parameter.
21 private final boolean mandatory;
23 private final boolean enableArguments;
25 private final boolean enableMultipleArguments;
27 private final Argument argumentType;
29 private final ArrayList<String> aliases;
31 private final String description;
33 private final ArrayList<String> arguments = new ArrayList<String>();
36 * If this parameter was present in the commandline, then this boolean will
37 * be set to <code>true</code>.
39 private boolean parameterSpecified;
41 public Parameter(final boolean mandatory, final boolean enableArguments,
42 final boolean enableMultipleArguments, final Argument argumentType,
43 final String description, final String... aliases) {
45 this.mandatory = mandatory;
46 this.enableArguments = enableArguments;
47 this.enableMultipleArguments = enableMultipleArguments;
48 this.argumentType = argumentType;
49 this.description = description;
53 final ArrayList<String> aliasesList = new ArrayList<String>();
54 for (final String alias : aliases)
55 aliasesList.add(alias);
56 this.aliases = aliasesList;
61 public Parameter(final String description, final String... aliases) {
62 this(false, false, false, null, description, aliases);
66 * @return <code>true</code> if no errors were found. <code>false</code>
69 public boolean addArgument(final String argumentString) {
70 // check if arguments are allowed for this parameter
71 if (!enableArguments) {
73 .println("Error! No arguments are allowed for parameters: "
78 // check if multiple arguments are allowed
79 if ((arguments.size() > 0) && (!enableMultipleArguments)) {
81 .println("Error! Only single argument is allowed for parameters: "
86 if (!argumentType.validate(argumentString)) {
88 System.out.println("Error! Invalid argument \"" + argumentString
89 + "\". It shall be " + argumentType.describeFormat() + ".");
94 arguments.add(argumentString);
99 public String getAliases() {
100 final StringBuffer buffer = new StringBuffer();
102 for (final String alias : aliases) {
104 if (buffer.length() > 0)
107 buffer.append(alias);
110 return buffer.toString();
113 public File getArgumentAsFile() {
114 if (arguments.size() != 1)
115 throw new RuntimeException("Parameter " + description
116 + " shall have exactly 1 argument.");
117 return new File(arguments.get(0));
120 public int getArgumentAsInteger() {
121 if (arguments.size() != 1)
122 throw new RuntimeException("Parameter " + description
123 + " shall have exactly 1 argument.");
124 return Integer.parseInt(arguments.get(0));
127 public String getArgumentAsString() {
128 if (arguments.size() != 1)
129 throw new RuntimeException("Parameter " + description
130 + " shall have exactly 1 argument.");
131 return arguments.get(0);
134 public List<File> getArgumentsAsFiles() {
135 final ArrayList<File> result = new ArrayList<File>();
137 for (final String argument : arguments) {
138 final File file = new File(argument);
145 public List<Integer> getArgumentsAsIntegers() {
146 final ArrayList<Integer> result = new ArrayList<Integer>();
148 for (final String argument : arguments)
149 result.add(Integer.valueOf(argument));
154 public List<String> getArgumentsAsStrings() {
155 final ArrayList<String> result = new ArrayList<String>(arguments);
159 public String getHelp() {
160 final StringBuffer buffer = new StringBuffer();
163 buffer.append(getAliases());
164 if (enableArguments) {
165 buffer.append(" (" + argumentType.describeFormat() + ")");
167 if (enableMultipleArguments)
168 buffer.append("...");
173 buffer.append(" " + description + "\n");
175 return buffer.toString();
178 public boolean isMandatory() {
183 * @return the parameterSpecified
185 public boolean isParameterSpecified() {
186 return parameterSpecified;
190 * @return <code>true</code> if given alias is registered for this
193 public boolean matchesAlias(final String alias) {
194 if (aliases.contains(alias))
201 * Notifies this parameter that no more arguments will follow. This gives
202 * parameter chance to verify if this is ok.
204 * @return <code>true</code> if no errors were found. <code>false</code>
207 public boolean noMoreArguments() {
209 if (enableArguments && (arguments.isEmpty())) {
211 System.out.println("Error! " + getAliases()
212 + " require at least one following argument.");
220 * @param parameterSpecified
221 * the parameterSpecified to set
223 public void setParameterSpecified(final boolean parameterSpecified) {
224 this.parameterSpecified = parameterSpecified;