/*
* JBoss, by Red Hat.
* Copyright 2010, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt 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.forge.shell.command.parser;
import java.util.Queue;
import org.jboss.forge.shell.command.CommandMetadata;
import org.jboss.forge.shell.command.OptionMetadata;
/**
* Parses named boolean options such as:
* <p/>
* <code>[command] {--toggle}</code>
*
* @author <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
* @author Mike Brock
*/
public class NamedBooleanOptionParser implements CommandParser
{
@Override
public CommandParserContext parse(final CommandMetadata command, final Queue<String> tokens,
final CommandParserContext ctx)
{
String currentToken = tokens.peek();
if (currentToken.matches("--?\\S+"))
{
if ((currentToken.length() > 1) && (currentToken.charAt(1) != '-'))
{
boolean matched = false;
for (int i = 1; i < currentToken.length(); i++)
{
String shortOption = currentToken.substring(i, i + 1);
try
{
if (command.hasShortOption(shortOption))
{
processOption(ctx, tokens, command, shortOption, true);
matched = true;
}
}
catch (IllegalArgumentException e)
{
ctx.addWarning("No such option [-" + shortOption + "] for command [" + command + "].");
}
}
if (matched)
tokens.remove();
}
else
{
currentToken = currentToken.substring(2);
try
{
if (command.hasOption(currentToken))
{
processOption(ctx, tokens, command, currentToken, false);
}
}
catch (IllegalArgumentException e)
{
ctx.addWarning("No such option [--" + currentToken + "] for command [" + command + "].");
}
}
}
return ctx;
}
private static void processOption(final CommandParserContext ctx, final Queue<String> tokens,
final CommandMetadata command, final String currentToken,
final boolean shortOption)
{
OptionMetadata option = command.getNamedOption(currentToken);
if (option.isBoolean())
{
String value = "true";
if (!tokens.isEmpty())
{
if (!shortOption)
{
tokens.remove();
}
String nextToken = tokens.peek();
if (!option.isFlagOnly() && (nextToken != null) && nextToken.matches("true|false"))
{
value = nextToken;
tokens.remove();
}
}
ctx.put(option, value, null);
}
}
}