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/**
* Copyright 2009-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jargs.gnu;
import java.io.Serializable;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
/**
* Largely GNU-compatible command-line options parser. Has short (-v) and long-form (--verbose) option support, and also
* allows options with associated values (-d 2, --debug 2, --debug=2). Option processing can be explicitly terminated by
* the argument '--'.
*
* @author Steve Purcell
* @version $Revision$
* @see jargs
* examples
*/
public class CmdLineParser {
/** The remaining args. */
private List remainingArgs;
/** The options. */
private HashMap options = new HashMap<>(10);
/** The values. */
private HashMap values = new HashMap<>(10);
/**
* Base class for exceptions that may be thrown when options are parsed.
*/
public abstract static class OptionException extends Exception {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/**
* Instantiates a new option exception.
*
* @param msg
* the msg
*/
OptionException(String msg) {
super(msg);
}
}
/**
* Thrown when the parsed command-line contains an option that is not recognised. getMessage() returns
* an error string suitable for reporting the error to the user (in English).
*/
public static class UnknownOptionException extends OptionException {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/** The option name. */
private final String optionName;
/**
* Instantiates a new unknown option exception.
*
* @param optionName
* the option name
*/
UnknownOptionException(String optionName) {
this(optionName, "Unknown option '" + optionName + "'");
}
/**
* Instantiates a new unknown option exception.
*
* @param optionName
* the option name
* @param msg
* the msg
*/
UnknownOptionException(String optionName, String msg) {
super(msg);
this.optionName = optionName;
}
/**
* Gets the option name.
*
* @return the name of the option that was unknown (e.g. "-u")
*/
public String getOptionName() {
return this.optionName;
}
}
/**
* Thrown when the parsed commandline contains multiple concatenated short options, such as -abcd, where one is
* unknown. getMessage() returns an english human-readable error string.
*
* @author Vidar Holen
*/
public static class UnknownSuboptionException extends UnknownOptionException {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/** The suboption. */
private final char suboption;
/**
* Instantiates a new unknown suboption exception.
*
* @param option
* the option
* @param suboption
* the suboption
*/
UnknownSuboptionException(String option, char suboption) {
super(option, "Illegal option: '" + suboption + "' in '" + option + "'");
this.suboption = suboption;
}
/**
* Gets the suboption.
*
* @return the suboption
*/
public char getSuboption() {
return suboption;
}
}
/**
* Thrown when the parsed commandline contains multiple concatenated short options, such as -abcd, where one or more
* requires a value. getMessage() returns an english human-readable error string.
*
* @author Vidar Holen
*/
public static class NotFlagException extends UnknownOptionException {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/** The notflag. */
private final char notflag;
/**
* Instantiates a new not flag exception.
*
* @param option
* the option
* @param unflaggish
* the unflaggish
*/
NotFlagException(String option, char unflaggish) {
super(option, "Illegal option: '" + option + "', '" + unflaggish + "' requires a value");
notflag = unflaggish;
}
/**
* Gets the option char.
*
* @return the first character which wasn't a boolean (e.g 'c')
*/
public char getOptionChar() {
return notflag;
}
}
/**
* Thrown when an illegal or missing value is given by the user for an option that takes a value.
* getMessage() returns an error string suitable for reporting the error to the user (in English).
*/
public static class IllegalOptionValueException extends OptionException {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/** The option. */
private final Option option;
/** The value. */
private final String value;
/**
* Instantiates a new illegal option value exception.
*
* @param opt
* the opt
* @param value
* the value
*/
public IllegalOptionValueException(Option opt, String value) {
super("Illegal value '" + value + "' for option "
+ (opt.shortForm() != null ? "-" + opt.shortForm() + "/" : "") + "--" + opt.longForm());
this.option = opt;
this.value = value;
}
/**
* Gets the option.
*
* @return the name of the option whose value was illegal (e.g. "-u")
*/
public Option getOption() {
return this.option;
}
/**
* Gets the value.
*
* @return the illegal value
*/
public String getValue() {
return this.value;
}
}
/**
* Representation of a command-line option.
*/
public abstract static class Option implements Serializable {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/** The short form. */
private String shortForm;
/** The long form. */
private String longForm;
/** The wants value. */
private boolean wantsValue;
/**
* Instantiates a new option.
*
* @param longForm
* the long form
* @param wantsValue
* the wants value
*/
protected Option(String longForm, boolean wantsValue) {
this(null, longForm, wantsValue);
}
/**
* Instantiates a new option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
* @param wantsValue
* the wants value
*/
protected Option(char shortForm, String longForm, boolean wantsValue) {
this(new String(new char[] { shortForm }), longForm, wantsValue);
}
/**
* Instantiates a new option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
* @param wantsValue
* the wants value
*/
private Option(String shortForm, String longForm, boolean wantsValue) {
if (longForm == null)
throw new IllegalArgumentException("Null longForm not allowed");
this.shortForm = shortForm;
this.longForm = longForm;
this.wantsValue = wantsValue;
}
/**
* Short form.
*
* @return the string
*/
public String shortForm() {
return this.shortForm;
}
/**
* Long form.
*
* @return the string
*/
public String longForm() {
return this.longForm;
}
/**
* Tells whether or not this option wants a value.
*
* @return true, if successful
*/
public boolean wantsValue() {
return this.wantsValue;
}
/**
* Gets the value.
*
* @param arg
* the arg
* @param locale
* the locale
* @return the value
* @throws IllegalOptionValueException
* the illegal option value exception
*/
public final Object getValue(String arg, Locale locale) throws IllegalOptionValueException {
if (this.wantsValue) {
if (arg == null) {
throw new IllegalOptionValueException(this, "");
}
return this.parseValue(arg, locale);
} else {
return Boolean.TRUE;
}
}
/**
* Override to extract and convert an option value passed on the command-line.
*
* @param arg
* the arg
* @param locale
* the locale
* @return the object
* @throws IllegalOptionValueException
* the illegal option value exception
*/
protected Object parseValue(String arg, Locale locale) throws IllegalOptionValueException {
return null;
}
/**
* The Class BooleanOption.
*/
public static class BooleanOption extends Option {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/**
* Instantiates a new boolean option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
*/
public BooleanOption(char shortForm, String longForm) {
super(shortForm, longForm, false);
}
/**
* Instantiates a new boolean option.
*
* @param longForm
* the long form
*/
public BooleanOption(String longForm) {
super(longForm, false);
}
}
/**
* An option that expects an integer value.
*/
public static class IntegerOption extends Option {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/**
* Instantiates a new integer option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
*/
public IntegerOption(char shortForm, String longForm) {
super(shortForm, longForm, true);
}
/**
* Instantiates a new integer option.
*
* @param longForm
* the long form
*/
public IntegerOption(String longForm) {
super(longForm, true);
}
@Override
protected Object parseValue(String arg, Locale locale) throws IllegalOptionValueException {
try {
return new Integer(arg);
} catch (NumberFormatException e) {
throw new IllegalOptionValueException(this, arg);
}
}
}
/**
* An option that expects a long integer value.
*/
public static class LongOption extends Option {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/**
* Instantiates a new long option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
*/
public LongOption(char shortForm, String longForm) {
super(shortForm, longForm, true);
}
/**
* Instantiates a new long option.
*
* @param longForm
* the long form
*/
public LongOption(String longForm) {
super(longForm, true);
}
@Override
protected Object parseValue(String arg, Locale locale) throws IllegalOptionValueException {
try {
return new Long(arg);
} catch (NumberFormatException e) {
throw new IllegalOptionValueException(this, arg);
}
}
}
/**
* An option that expects a floating-point value.
*/
public static class DoubleOption extends Option {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/**
* Instantiates a new double option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
*/
public DoubleOption(char shortForm, String longForm) {
super(shortForm, longForm, true);
}
/**
* Instantiates a new double option.
*
* @param longForm
* the long form
*/
public DoubleOption(String longForm) {
super(longForm, true);
}
@Override
protected Object parseValue(String arg, Locale locale) throws IllegalOptionValueException {
try {
NumberFormat format = NumberFormat.getNumberInstance(locale);
Number num = format.parse(arg);
return num.doubleValue();
} catch (ParseException e) {
throw new IllegalOptionValueException(this, arg);
}
}
}
/**
* An option that expects a string value.
*/
public static class StringOption extends Option {
/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;
/**
* Instantiates a new string option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
*/
public StringOption(char shortForm, String longForm) {
super(shortForm, longForm, true);
}
/**
* Instantiates a new string option.
*
* @param longForm
* the long form
*/
public StringOption(String longForm) {
super(longForm, true);
}
@Override
protected Object parseValue(String arg, Locale locale) {
return arg;
}
}
}
/**
* Add the specified Option to the list of accepted options.
*
* @param opt
* the opt
* @return the option
*/
public final Option addOption(Option opt) {
if (opt.shortForm() != null) {
this.options.put("-" + opt.shortForm(), opt);
}
this.options.put("--" + opt.longForm(), opt);
return opt;
}
/**
* Convenience method for adding a string option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
* @return the new Option
*/
public final Option addStringOption(char shortForm, String longForm) {
return addOption(new Option.StringOption(shortForm, longForm));
}
/**
* Convenience method for adding a string option.
*
* @param longForm
* the long form
* @return the new Option
*/
public final Option addStringOption(String longForm) {
return addOption(new Option.StringOption(longForm));
}
/**
* Convenience method for adding an integer option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
* @return the new Option
*/
public final Option addIntegerOption(char shortForm, String longForm) {
return addOption(new Option.IntegerOption(shortForm, longForm));
}
/**
* Convenience method for adding an integer option.
*
* @param longForm
* the long form
* @return the new Option
*/
public final Option addIntegerOption(String longForm) {
return addOption(new Option.IntegerOption(longForm));
}
/**
* Convenience method for adding a long integer option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
* @return the new Option
*/
public final Option addLongOption(char shortForm, String longForm) {
return addOption(new Option.LongOption(shortForm, longForm));
}
/**
* Convenience method for adding a long integer option.
*
* @param longForm
* the long form
* @return the new Option
*/
public final Option addLongOption(String longForm) {
return addOption(new Option.LongOption(longForm));
}
/**
* Convenience method for adding a double option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
* @return the new Option
*/
public final Option addDoubleOption(char shortForm, String longForm) {
return addOption(new Option.DoubleOption(shortForm, longForm));
}
/**
* Convenience method for adding a double option.
*
* @param longForm
* the long form
* @return the new Option
*/
public final Option addDoubleOption(String longForm) {
return addOption(new Option.DoubleOption(longForm));
}
/**
* Convenience method for adding a boolean option.
*
* @param shortForm
* the short form
* @param longForm
* the long form
* @return the new Option
*/
public final Option addBooleanOption(char shortForm, String longForm) {
return addOption(new Option.BooleanOption(shortForm, longForm));
}
/**
* Convenience method for adding a boolean option.
*
* @param longForm
* the long form
* @return the new Option
*/
public final Option addBooleanOption(String longForm) {
return addOption(new Option.BooleanOption(longForm));
}
/**
* Equivalent to {@link #getOptionValue(Option, Object) getOptionValue(o, null)}.
*
* @param o
* the o
* @return the option value
*/
public final Object getOptionValue(Option o) {
return getOptionValue(o, null);
}
/**
* Gets the option value.
*
* @param o
* the o
* @param def
* the def
* @return the parsed value of the given Option, or the given default 'def' if the option was not set
*/
@SuppressWarnings("unchecked")
public final Object getOptionValue(Option o, Object def) {
List v = (ArrayList) values.get(o.longForm());
if (v == null) {
return def;
} else if (v.isEmpty()) {
return null;
} else {
Object result = v.get(0);
v.remove(0);
return result;
}
}
/**
* Gets the option values.
*
* @param option
* the option
* @return A Vector giving the parsed values of all the occurrences of the given Option, or an empty Vector if the
* option was not set.
*/
public final List getOptionValues(Option option) {
List result = new ArrayList<>();
while (true) {
Object o = getOptionValue(option, null);
if (o == null) {
return result;
} else {
result.add((String) o);
}
}
}
/**
* Gets the remaining args.
*
* @return the non-option arguments
*/
public final List getRemainingArgs() {
return this.remainingArgs;
}
/**
* Extract the options and non-option arguments from the given list of command-line arguments. The default locale is
* used for parsing options whose values might be locale-specific.
*
* @param argv
* the argv
* @throws IllegalOptionValueException
* the illegal option value exception
* @throws UnknownOptionException
* the unknown option exception
*/
public final void parse(String[] argv) throws IllegalOptionValueException, UnknownOptionException {
// It would be best if this method only threw OptionException, but for
// backwards compatibility with old user code we throw the two
// exceptions above instead.
parse(argv, Locale.getDefault());
}
/**
* Extract the options and non-option arguments from the given list of command-line arguments. The specified locale
* is used for parsing options whose values might be locale-specific.
*
* @param argv
* the argv
* @param locale
* the locale
* @throws IllegalOptionValueException
* the illegal option value exception
* @throws UnknownOptionException
* the unknown option exception
*/
public final void parse(String[] argv, Locale locale) throws IllegalOptionValueException, UnknownOptionException {
// It would be best if this method only threw OptionException, but for
// backwards compatibility with old user code we throw the two
// exceptions above instead.
List otherArgs = new ArrayList<>();
int position = 0;
this.values = new HashMap<>(10);
while (position < argv.length) {
String curArg = argv[position];
if (curArg.startsWith("-")) {
if ("--".equals(curArg)) {
// end of options
position += 1;
break;
}
String valueArg = null;
if (curArg.startsWith("--")) {
// handle --arg=value
int equalsPos = curArg.indexOf('=');
if (equalsPos != -1) {
valueArg = curArg.substring(equalsPos + 1);
curArg = curArg.substring(0, equalsPos);
}
} else if (curArg.length() > 2) {
// handle -abcd
for (int i = 1; i < curArg.length(); i++) {
Option opt = this.options.get("-" + curArg.charAt(i));
if (opt == null)
throw new UnknownSuboptionException(curArg, curArg.charAt(i));
if (opt.wantsValue())
throw new NotFlagException(curArg, curArg.charAt(i));
addValue(opt, opt.getValue(null, locale));
}
position++;
continue;
}
Option opt = this.options.get(curArg);
if (opt == null) {
throw new UnknownOptionException(curArg);
}
Object value;
if (opt.wantsValue()) {
if (valueArg == null) {
position += 1;
if (position < argv.length) {
valueArg = argv[position];
}
}
value = opt.getValue(valueArg, locale);
} else {
value = opt.getValue(null, locale);
}
addValue(opt, value);
position += 1;
} else {
otherArgs.add(curArg);
position += 1;
}
}
for (; position < argv.length; ++position) {
otherArgs.add(argv[position]);
}
this.remainingArgs = new ArrayList<>(otherArgs.size());
otherArgs.addAll(remainingArgs);
}
/**
* Adds the value.
*
* @param opt
* the opt
* @param value
* the value
*/
@SuppressWarnings("unchecked")
private void addValue(Option opt, Object value) {
String lf = opt.longForm();
List