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Java example source code file (NotificationTargetImpl.java)

This example Java source code file (NotificationTargetImpl.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

illegalargumentexception, inetaddress, invalid, ipv6, missing, more, net, network, notificationtargetimpl, string, unknownhostexception

The NotificationTargetImpl.java Java example source code

/*
 * Copyright (c) 2003, 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.management.snmp.jvminstr;

import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * Notification Target data.
 */
public class NotificationTargetImpl implements NotificationTarget {
    private InetAddress address;
    private int port;
    private String community;

    /**
     * Target parameter is a <CODE>java.lang.String
     * target synctax is <host>::community. Eg: "localhost:163:private".
     * <p>The host is a host name, an IPv4 numeric
     * host address, or an IPv6 numeric address enclosed in square
     * brackets.</p>
     * @throws IllegalArgumentException In case the target is malformed
     */
    public NotificationTargetImpl(String target)
        throws IllegalArgumentException, UnknownHostException  {
        parseTarget(target);
    }

    public NotificationTargetImpl(String address, int port,
                                  String community)
        throws UnknownHostException {
        this(InetAddress.getByName(address),port,community);
    }

    public NotificationTargetImpl(InetAddress address, int port,
                                  String community) {
        this.address = address;
        this.port = port;
        this.community = community;
    }

    private void parseTarget(String target)
        throws IllegalArgumentException, UnknownHostException {

        if(target == null ||
           target.length() == 0) throw new
               IllegalArgumentException("Invalid target [" + target + "]");

        String addrStr;
        if (target.startsWith("[")) {
            final int index = target.indexOf("]");
            final int index2 = target.lastIndexOf(":");
            if(index == -1)
                throw new IllegalArgumentException("Host starts with [ but " +
                                                   "does not end with ]");
            addrStr = target.substring(1, index);
            port = Integer.parseInt(target.substring(index + 2,
                                                     index2));
            if (!isNumericIPv6Address(addrStr)) {
            throw new IllegalArgumentException("Address inside [...] must " +
                                               "be numeric IPv6 address");
            }
            if (addrStr.startsWith("["))
                throw new IllegalArgumentException("More than one [[...]]");
        } else {
            final int index = target.indexOf(":");
            final int index2 = target.lastIndexOf(":");
            if(index == -1) throw new
                IllegalArgumentException("Missing port separator \":\"");
            addrStr = target.substring(0, index);

            port = Integer.parseInt(target.substring(index + 1,
                                                     index2));
        }

        address = InetAddress.getByName(addrStr);

        //THE CHECK SHOULD BE STRONGER!!!
        final int index = target.lastIndexOf(":");

        community = target.substring(index + 1, target.length());

    }

    /* True if this string, assumed to be a valid argument to
     * InetAddress.getByName, is a numeric IPv6 address.
     */
    private static boolean isNumericIPv6Address(String s) {
        // address contains colon iff it's a numeric IPv6 address
        return (s.indexOf(':') >= 0);
    }

    public String getCommunity() {
        return community;
    }

    public InetAddress getAddress() {
        return address;
    }

    public int getPort() {
        return port;
    }

    public String toString() {
        return "address : " + address + " port : " + port +
            " community : " + community;
    }
}

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