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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [java/] [net/] [InetSocketAddress.java] - Blame information for rev 791

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1 771 jeremybenn
/* InetSocketAddress.java --
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   Copyright (C) 2002, 2006  Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING.  If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library.  Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module.  An independent module is a module which is not derived from
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or based on this library.  If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so.  If you do not wish to do so, delete this
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exception statement from your version. */
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package java.net;
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/**
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 * InetSocketAddress instances represent socket addresses
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 * in the java.nio package. They encapsulate a InetAddress and
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 * a port number.
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 *
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 * @since 1.4
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 */
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public class InetSocketAddress extends SocketAddress
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{
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  /**
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   * Compatible with JDK 1.4+
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   */
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  private static final long serialVersionUID = 5076001401234631237L;
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  /**
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   * Name of host.
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   */
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  private String hostname;
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  /**
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   * Address of host.
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   */
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  private InetAddress addr;
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  /**
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   * Port of host.
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   */
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  private int port;
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  /**
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   * Constructs an InetSocketAddress instance.
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   *
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   * @param addr Address of the socket
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   * @param port Port if the socket
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   *
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   * @exception IllegalArgumentException If the port number is illegel
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   */
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  public InetSocketAddress(InetAddress addr, int port)
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    throws IllegalArgumentException
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  {
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    if (port < 0 || port > 65535)
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      throw new IllegalArgumentException("Bad port number: " + port);
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    if (addr == null)
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      addr = InetAddress.ANY_IF;
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    this.addr = addr;
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    this.port = port;
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  }
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  /**
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   * Constructs an InetSocketAddress instance.
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   *
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   * @param port Port if the socket
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   *
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   * @exception IllegalArgumentException If the port number is illegal
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   */
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  public InetSocketAddress(int port) throws IllegalArgumentException
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  {
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    this((InetAddress) null, port);
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  }
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  /**
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   * Constructs an InetSocketAddress instance.
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   *
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   * @param hostname The hostname for the socket address
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   * @param port The port for the socket address
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   *
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   * @exception IllegalArgumentException If the port number is illegal or
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   * the hostname argument is null
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   */
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  public InetSocketAddress(String hostname, int port)
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  {
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    this(hostname, port, true);
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  }
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  /**
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   * Constructs an InetSocketAddress instance.
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   *
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   * @param hostname The hostname for the socket address
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   * @param port The port for the socket address
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   * @param resolve <code>true</code> if the address has to be resolved,
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   * <code>false</code> otherwise
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   *
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   * @exception IllegalArgumentException If the port number is illegal or
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   * the hostname argument is null
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   */
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  private InetSocketAddress(String hostname, int port, boolean resolve)
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  {
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    if (hostname == null)
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      throw new IllegalArgumentException("Null host name value");
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    if (port < 0 || port > 65535)
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      throw new IllegalArgumentException("Bad port number: " + port);
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    this.port = port;
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    this.hostname = hostname;
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    this.addr = null;
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    if (resolve)
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    {
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      try
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        {
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          this.addr = InetAddress.getByName(hostname);
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        }
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      catch (Exception e) // UnknownHostException, SecurityException
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        {
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          // Do nothing here. this.addr is already set to null.
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        }
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    }
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  }
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  /**
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   * Creates an unresolved <code>InetSocketAddress</code> object.
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   *
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   * @param hostname The hostname for the socket address
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   * @param port The port for the socket address
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   *
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   * @exception IllegalArgumentException If the port number is illegal or
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   * the hostname argument is null
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   *
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   * @since 1.5
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   */
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  public static InetSocketAddress createUnresolved(String hostname, int port)
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  {
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    return new InetSocketAddress(hostname, port, false);
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  }
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  /**
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   * Test if obj is a <code>InetSocketAddress</code> and
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   * has the same address and port
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   *
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   * @param obj The obj to compare this address with.
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   *
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   * @return True if obj is equal.
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   */
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  public final boolean equals(Object obj)
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  {
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    // InetSocketAddress objects are equal when addr and port are equal.
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    // The hostname may differ.
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    if (obj instanceof InetSocketAddress)
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      {
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        InetSocketAddress sa = (InetSocketAddress) obj;
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        if (addr == null && sa.addr != null)
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          return false;
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        else if (addr == null && sa.addr == null) // we know hostname != null
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          return hostname.equals(sa.hostname) && sa.port == port;
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        else
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          return addr.equals(sa.addr) && sa.port == port;
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      }
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    return false;
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  }
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  /**
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   * Returns the <code>InetAddress</code> or
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   * <code>null</code> if its unresolved
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   *
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   * @return The IP address of this address.
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   */
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  public final InetAddress getAddress()
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  {
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    return addr;
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  }
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  /**
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   * Returns <code>hostname</code>
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   *
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   * @return The hostname of this address.
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   */
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  public final String getHostName()
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  {
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    if (hostname == null) // we know addr != null
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      hostname = addr.getHostName();
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    return hostname;
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  }
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  /**
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   * Returns the <code>port</code>
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   *
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   * @return The port of this address.
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   */
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  public final int getPort()
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  {
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    return port;
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  }
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  /**
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   * Returns the hashcode of the <code>InetSocketAddress</code>
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   *
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   * @return The hashcode for this address.
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   */
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  public final int hashCode()
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  {
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    return port + addr.hashCode();
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  }
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  /**
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   * Checks wether the address has been resolved or not
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   *
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   * @return True if address is unresolved.
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   */
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  public final boolean isUnresolved()
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  {
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    return addr == null;
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  }
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  /**
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   * Returns the <code>InetSocketAddress</code> as string
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   *
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   * @return A string representation of this address.
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   */
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  public String toString()
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  {
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    // Note: if addr is null, then hostname != null.
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    return (addr == null ? hostname : addr.toString()) + ":" + port;
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  }
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}

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