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/*
* JBoss, Home of Professional Open Source.
* Copyright 2014, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.plugin.server;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* Stores arguments to be passed to the command line.
*
* @author James R. Perkins
*/
class Arguments {
private final Map map;
Arguments() {
this.map = new LinkedHashMap();
}
/**
* Clears any arguments currently set.
*/
public void clear() {
map.clear();
}
/**
* {@link #parse(String) Parses} the argument and adds it to the collection of arguments ignoring {@code null}
* arguments.
*
* @param arg the argument to add
*/
public void add(final String arg) {
if (arg != null) {
final Argument argument = parse(arg);
map.put(argument.getKey(), argument);
}
}
/**
* Adds a key/value pair to the collection of arguments.
*
* If the key starts with {@code -D} it's assumed it's a system property argument and the prefix will be stripped
* from the key when checking for uniqueness.
*
* @param key the key for the argument
* @param value the value of the argument which may be {@code null}
*/
public void add(final String key, final String value) {
if (key != null) {
final Argument argument;
if (key.startsWith("-D")) {
if (value == null) {
argument = createSystemProperty(key);
} else {
argument = createSystemProperty(key, value);
}
} else {
if (value == null) {
argument = create(key);
} else {
argument = create(key, value);
}
}
map.put(key, argument);
}
}
/**
* Parses each argument and adds them to the collection of arguments ignoring any {@code null} values.
*
* @param args the arguments to add
*
* @see #add(String)
*/
public void addAll(final String... args) {
if (args != null) {
for (String arg : args) {
add(arg);
}
}
}
/**
* Checks to see if there is an argument for the key.
*
* @param key they to check
*
* @return {@code true} if there is an argument with the key, otherwise {@code false}
*/
public boolean has(final String key) {
return map.containsKey(key);
}
/**
* Gets the value for the key.
*
* @param key the key to check for the value
*
* @return the value or {@code null} if the key is not found or the value was {@code null}
*/
public String get(final String key) {
final Argument arg = map.get(key);
if (arg != null) {
return arg.getValue();
}
return null;
}
/**
* Returns the arguments as a list in their command line form.
*
* @return the arguments for the command line
*/
public List asList() {
final List result = new ArrayList();
for (Argument arg : map.values()) {
result.add(arg.asCommandLineArgument());
}
return result;
}
/**
* Adds the argument to the collection of arguments ignoring {@code null} values.
*
* @param argument the argument to add
*/
void add(final Argument argument) {
if (argument != null) {
map.put(argument.getKey(), argument);
}
}
/**
* Attempts to parse the argument into a key value pair. The separator is assumed to be {@code =}. If the value
* starts with a {@code -D} it's assumed to be a system property.
*
* If the argument is not a traditional key/value pair separated by an {@code =} the arguments key will be the full
* argument passed in and the arguments value will be {@code null}.
*
* @param arg the argument to parse
*
* @return the parsed argument
*/
public static Argument parse(final String arg) {
if (arg.startsWith("-D")) {
final String key;
final String value;
// Check for an =
final int index = arg.indexOf('=');
if (index == -1) {
key = arg.substring(2);
value = null;
} else {
key = arg.substring(2, index);
if (arg.length() < (index + 1)) {
value = null;
} else {
value = arg.substring(index + 1);
}
}
return new SystemPropertyArgument(key, value);
}
final String key;
final String value;
// Check for an =
final int index = arg.indexOf('=');
if (index == -1) {
key = arg;
value = null;
} else {
key = arg.substring(0, index);
if (arg.length() < (index + 1)) {
value = null;
} else {
value = arg.substring(index + 1);
}
}
return new DefaultArgument(key, value);
}
private static Argument create(final String arg) {
return new DefaultArgument(arg, null);
}
private static Argument create(final String key, final String value) {
return new DefaultArgument(key, value);
}
private static Argument createSystemProperty(final String arg) {
return new SystemPropertyArgument(arg, null);
}
private static Argument createSystemProperty(final String key, final String value) {
return new SystemPropertyArgument(key, value);
}
/**
* Represents a command line argument in a possible key/value pair.
*/
public abstract static class Argument {
private final String key;
private final String value;
protected Argument(final String key, final String value) {
this.key = key;
this.value = value;
}
/**
* They key to the command line argument which may be the full argument.
*
* @return the key
*/
public String getKey() {
return key;
}
/**
* The optional value for the command line argument.
*
* @return the value or {@code null}
*/
public String getValue() {
return value;
}
/**
* The argument formatted for the command line.
*
* @return the command line argument
*/
public abstract String asCommandLineArgument();
}
private static final class SystemPropertyArgument extends Argument {
private final String cliArg;
public SystemPropertyArgument(final String key, final String value) {
super(key, value);
if (value != null) {
cliArg = "-D" + key + "=" + value;
} else {
cliArg = "-D" + key;
}
}
@Override
public String asCommandLineArgument() {
return cliArg;
}
}
private static final class DefaultArgument extends Argument {
private final String cliArg;
public DefaultArgument(final String key, final String value) {
super(key, value);
if (value != null) {
cliArg = key + "=" + value;
} else {
cliArg = key;
}
}
@Override
public String asCommandLineArgument() {
return cliArg;
}
}
}
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