Java Socket Address Get isSameAddress(SocketAddress a1, SocketAddress a2)

Description

Returns true if both SocketAddress es have the same InetAddress

License

Apache License

Declaration

public static boolean isSameAddress(SocketAddress a1, SocketAddress a2) 

Method Source Code

//package com.java2s;
/*/*w  w w . ja  v a2s. c o  m*/
 * Copyright 2010-2012 Roger Kapsi
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;

public class Main {
    /**
     * Returns {@code true} if both {@link SocketAddress}es have 
     * the same {@link InetAddress}
     */
    public static boolean isSameAddress(SocketAddress a1, SocketAddress a2) {
        if (isUnresolved(a1) && isUnresolved(a2)) {
            if (getHostName(a1).equals(getHostName(a2))) {
                return true;
            }
        }

        return getResolved(a1).getAddress().equals(getResolved(a2).getAddress());
    }

    /**
     * Returns {@code true} if the given {@link SocketAddress} is unresolved.
     */
    public static boolean isUnresolved(SocketAddress address) {
        return ((InetSocketAddress) address).isUnresolved();
    }

    /**
     * An utility method to get the {@link InetSocketAddress#getHostName()}.
     */
    public static String getHostName(SocketAddress address) {
        return ((InetSocketAddress) address).getHostName();
    }

    /**
     * An utility method to get the {@link InetAddress} from the
     * {@link SocketAddress}.
     */
    public static InetAddress getAddress(SocketAddress address) {
        return getResolved(address).getAddress();
    }

    /**
     * Resolves (if necessary) the given {@link SocketAddress} and returns it.
     */
    public static InetSocketAddress getResolved(SocketAddress address) {
        InetSocketAddress isa = (InetSocketAddress) address;
        if (isa.isUnresolved()) {
            return new InetSocketAddress(isa.getHostName(), isa.getPort());
        }

        return isa;
    }

    /**
     * Returns the port number.
     */
    public static int getPort(SocketAddress address) {
        return ((InetSocketAddress) address).getPort();
    }
}

Related

1. inetSocketAddress2IpPort(InetSocketAddress addr)
2. IpToString(InetSocketAddress address)
3. isAddressDefined(InetSocketAddress address)
4. isLegalPeerAddress(@CheckForNull SocketAddress socketAddress)
5. isLocalAddress(Socket socket)
6. isUdpPortAvailable(InetSocketAddress localAddress)
7. isUnresolved(SocketAddress address)
8. isValidMulticastAddress(final InetSocketAddress address)
9. normalizeSocketAddr(InetSocketAddress address)