Java example source code file (Arguments.java)

This example Java source code file (Arguments.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arguments, definitions, hostidentifier, illegalargumentexception, malformed, net, network, string, urisyntaxexception

The Arguments.java Java example source code

/*
 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.tools.jps;

import java.io.*;
import java.net.*;
import sun.jvmstat.monitor.*;

/**
 * Class for processing command line arguments and providing method
 * level access to the command line arguments.
 *
 * @author Brian Doherty
 * @since 1.5
 */
public class Arguments {

    private static final boolean debug = Boolean.getBoolean("jps.debug");
    private static final boolean printStackTrace = Boolean.getBoolean(
            "jps.printStackTrace");

    private boolean help;
    private boolean quiet;
    private boolean longPaths;
    private boolean vmArgs;
    private boolean vmFlags;
    private boolean mainArgs;
    private String hostname;
    private HostIdentifier hostId;

    public static void printUsage(PrintStream ps) {
      ps.println("usage: jps [-help]");
      ps.println("       jps [-q] [-mlvV] [<hostid>]");
      ps.println();
      ps.println("Definitions:");
      ps.println("    <hostid>:      [:]");
    }

    public Arguments(String[] args) throws IllegalArgumentException {
        int argc = 0;

        if (args.length == 1) {
            if ((args[0].compareTo("-?") == 0)
                    || (args[0].compareTo("-help")== 0)) {
              help = true;
              return;
            }
        }

        for (argc = 0; (argc < args.length) && (args[argc].startsWith("-"));
                argc++) {
            String arg = args[argc];

            if (arg.compareTo("-q") == 0) {
              quiet = true;
            } else if (arg.startsWith("-")) {
                for (int j = 1; j < arg.length(); j++) {
                    switch (arg.charAt(j)) {
                    case 'm':
                        mainArgs = true;
                        break;
                    case 'l':
                        longPaths = true;
                        break;
                    case 'v':
                        vmArgs = true;
                        break;
                    case 'V':
                        vmFlags = true;
                        break;
                    default:
                        throw new IllegalArgumentException("illegal argument: "
                                                           + args[argc]);
                    }
                }
            } else {
                throw new IllegalArgumentException("illegal argument: "
                                                   + args[argc]);
            }
        }

        switch (args.length - argc) {
        case 0:
            hostname = null;
            break;
        case 1:
            hostname = args[args.length - 1];
            break;
        default:
            throw new IllegalArgumentException("invalid argument count");
        }

        try {
            hostId = new HostIdentifier(hostname);
        } catch (URISyntaxException e) {
            IllegalArgumentException iae =
                    new IllegalArgumentException("Malformed Host Identifier: "
                                                 + hostname);
            iae.initCause(e);
            throw iae;
        }
    }

    public boolean isDebug() {
        return debug;
    }

    public boolean printStackTrace() {
        return printStackTrace;
    }

    public boolean isHelp() {
        return help;
    }

    public boolean isQuiet() {
        return quiet;
    }

    public boolean showLongPaths() {
        return longPaths;
    }

    public boolean showVmArgs() {
        return vmArgs;
    }

    public boolean showVmFlags() {
        return vmFlags;
    }

    public boolean showMainArgs() {
        return mainArgs;
    }

    public String hostname() {
        return hostname;
    }

    public HostIdentifier hostId() {
        return hostId;
    }
}