| /* InetSocketAddress.java -- |
| Copyright (C) 2002, 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package java.net; |
| |
| |
| /** |
| * InetSocketAddress instances represent socket addresses |
| * in the java.nio package. They encapsulate a InetAddress and |
| * a port number. |
| * |
| * @since 1.4 |
| */ |
| public class InetSocketAddress extends SocketAddress |
| { |
| /** |
| * Compatible with JDK 1.4+ |
| */ |
| private static final long serialVersionUID = 5076001401234631237L; |
| |
| /** |
| * Name of host. |
| */ |
| private String hostname; |
| |
| /** |
| * Address of host. |
| */ |
| private InetAddress addr; |
| |
| /** |
| * Port of host. |
| */ |
| private int port; |
| |
| /** |
| * Constructs an InetSocketAddress instance. |
| * |
| * @param addr Address of the socket |
| * @param port Port if the socket |
| * |
| * @exception IllegalArgumentException If the port number is illegel |
| */ |
| public InetSocketAddress(InetAddress addr, int port) |
| throws IllegalArgumentException |
| { |
| if (port < 0 || port > 65535) |
| throw new IllegalArgumentException("Bad port number: " + port); |
| |
| if (addr == null) |
| addr = InetAddress.ANY_IF; |
| |
| this.addr = addr; |
| this.port = port; |
| } |
| |
| /** |
| * Constructs an InetSocketAddress instance. |
| * |
| * @param port Port if the socket |
| * |
| * @exception IllegalArgumentException If the port number is illegal |
| */ |
| public InetSocketAddress(int port) throws IllegalArgumentException |
| { |
| this((InetAddress) null, port); |
| } |
| |
| /** |
| * Constructs an InetSocketAddress instance. |
| * |
| * @param hostname The hostname for the socket address |
| * @param port The port for the socket address |
| * |
| * @exception IllegalArgumentException If the port number is illegal or |
| * the hostname argument is null |
| */ |
| public InetSocketAddress(String hostname, int port) |
| { |
| this(hostname, port, true); |
| } |
| |
| /** |
| * Constructs an InetSocketAddress instance. |
| * |
| * @param hostname The hostname for the socket address |
| * @param port The port for the socket address |
| * @param resolve <code>true</code> if the address has to be resolved, |
| * <code>false</code> otherwise |
| * |
| * @exception IllegalArgumentException If the port number is illegal or |
| * the hostname argument is null |
| */ |
| private InetSocketAddress(String hostname, int port, boolean resolve) |
| { |
| if (hostname == null) |
| throw new IllegalArgumentException("Null host name value"); |
| |
| if (port < 0 || port > 65535) |
| throw new IllegalArgumentException("Bad port number: " + port); |
| |
| this.port = port; |
| this.hostname = hostname; |
| this.addr = null; |
| |
| if (resolve) |
| { |
| try |
| { |
| this.addr = InetAddress.getByName(hostname); |
| } |
| catch (Exception e) // UnknownHostException, SecurityException |
| { |
| // Do nothing here. this.addr is already set to null. |
| } |
| } |
| |
| } |
| |
| /** |
| * Creates an unresolved <code>InetSocketAddress</code> object. |
| * |
| * @param hostname The hostname for the socket address |
| * @param port The port for the socket address |
| * |
| * @exception IllegalArgumentException If the port number is illegal or |
| * the hostname argument is null |
| * |
| * @since 1.5 |
| */ |
| public static InetSocketAddress createUnresolved(String hostname, int port) |
| { |
| return new InetSocketAddress(hostname, port, false); |
| } |
| |
| /** |
| * Test if obj is a <code>InetSocketAddress</code> and |
| * has the same address and port |
| * |
| * @param obj The obj to compare this address with. |
| * |
| * @return True if obj is equal. |
| */ |
| public final boolean equals(Object obj) |
| { |
| // InetSocketAddress objects are equal when addr and port are equal. |
| // The hostname may differ. |
| if (obj instanceof InetSocketAddress) |
| { |
| InetSocketAddress sa = (InetSocketAddress) obj; |
| |
| if (addr == null && sa.addr != null) |
| return false; |
| else if (addr == null && sa.addr == null) // we know hostname != null |
| return hostname.equals(sa.hostname) && sa.port == port; |
| else |
| return addr.equals(sa.addr) && sa.port == port; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Returns the <code>InetAddress</code> or |
| * <code>null</code> if its unresolved |
| * |
| * @return The IP address of this address. |
| */ |
| public final InetAddress getAddress() |
| { |
| return addr; |
| } |
| |
| /** |
| * Returns <code>hostname</code> |
| * |
| * @return The hostname of this address. |
| */ |
| public final String getHostName() |
| { |
| if (hostname == null) // we know addr != null |
| hostname = addr.getHostName(); |
| |
| return hostname; |
| } |
| |
| /** |
| * Returns the <code>port</code> |
| * |
| * @return The port of this address. |
| */ |
| public final int getPort() |
| { |
| return port; |
| } |
| |
| /** |
| * Returns the hashcode of the <code>InetSocketAddress</code> |
| * |
| * @return The hashcode for this address. |
| */ |
| public final int hashCode() |
| { |
| return port + addr.hashCode(); |
| } |
| |
| /** |
| * Checks wether the address has been resolved or not |
| * |
| * @return True if address is unresolved. |
| */ |
| public final boolean isUnresolved() |
| { |
| return addr == null; |
| } |
| |
| /** |
| * Returns the <code>InetSocketAddress</code> as string |
| * |
| * @return A string representation of this address. |
| */ |
| public String toString() |
| { |
| // Note: if addr is null, then hostname != null. |
| return (addr == null ? hostname : addr.toString()) + ":" + port; |
| } |
| } |