/* * $Id$ * * Copyright (C) 2003-2015 JNode.org * * This library 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 library 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 library; If not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ package org.jnode.shell.syntax; import java.net.InetAddress; import java.net.UnknownHostException; import org.jnode.shell.CommandLine.Token; /** * This class implements hostname/ip address valued command line arguments. At the moment, it performs * no special syntax checking and does no completion. * * @author crawley@jnode.org */ public class HostNameArgument extends Argument<String> { // We won't make the Argument type parameter InetAddress because that would // require us to resolve DNS addresses while we are parsing / completing. public HostNameArgument(String label, int flags, String description) { super(label, flags, new String[0], description); } public HostNameArgument(String label, int flags) { this(label, flags, null); } public HostNameArgument(String label) { this(label, 0, null); } @Override protected String doAccept(Token token, int flags) throws CommandSyntaxException { return token.text; } @Override protected String argumentKind() { return "host name/ip address"; } /** * Resolve the hostname / IP address string to a network address. * @return the network address. * @throws UnknownHostException if the hostname does not resolve to an address */ public InetAddress getAsInetAddress() throws UnknownHostException { return InetAddress.getByName(getValue()); } /** * Resolve the ith hostname / IP address string to a network address. * @param i the index of the hostname we want the address * @return the network address. * @throws UnknownHostException if the hostname does not resolve to an address */ public InetAddress getAsInetAddress(int i) throws UnknownHostException { return InetAddress.getByName(getValues()[i]); } }