address.java

jxta_src_2.41b jxta 2.41b 最新版源码 from www.jxta.org

/*
 *  Copyright (c) 2001 Sun Microsystems, Inc.  All rights
 *  reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *  notice, this list of conditions and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in
 *  the documentation and/or other materials provided with the
 *  distribution.
 *
 *  3. The end-user documentation included with the redistribution,
 *  if any, must include the following acknowledgment:
 *  "This product includes software developed by the
 *  Sun Microsystems, Inc. for Project JXTA."
 *  Alternately, this acknowledgment may appear in the software itself,
 *  if and wherever such third-party acknowledgments normally appear.
 *
 *  4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA"
 *  must not be used to endorse or promote products derived from this
 *  software without prior written permission. For written
 *  permission, please contact Project JXTA at http://www.jxta.org.
 *
 *  5. Products derived from this software may not be called "JXTA",
 *  nor may "JXTA" appear in their name, without prior written
 *  permission of Sun.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 *  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 *  USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 *  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *  ====================================================================
 *
 *  This software consists of voluntary contributions made by many
 *  individuals on behalf of Project JXTA.  For more
 *  information on Project JXTA, please see
 *  <http://www.jxta.org/>.
 *
 *  This license is based on the BSD license adopted by the Apache Foundation.
 *
 *  $Id: Address.java,v 1.14 2006/03/14 20:58:37 gonzo Exp $
 */
package net.jxta.ext.config;

import java.net.URI;

/**
 * Generic address represenation that includes a {@link java.net.URI} and port
 * range.
 *
 * <p>An address representation as codified in a {@link java.net.URI} coupled
 * with a port range specifier. The JXTA Platform will dynamically bind to an
 * available port that resides within the range of the port specified in the
 * address plus the range.
 *
 * <p><b>note:</b> not all transports support dynamic port range selection as
 * of yet.
 *
 * @author     james todd [gonzo at jxta dot org]
 */

public class Address {

    private URI address = null;
    private int range = Default.MINIMUM_PORT;

    /**
     * Default constructor.
     */
    
    public Address() {
        this(null);
    }

    /**
     * Copy constructor.
     *
     * @param   a       specified address
     */
    
    public Address(Address a) {
        setAddress(a != null ? a.getAddress() : null);
        setPortRange(a != null ?
                     a.getPortRange() : Default.MINIMUM_DYNAMIC_PORT);
    }

    /**
     * Accessor to {@link java.net.URI} address.
     *
     * @return          the {@link java.net.URI} address
     */
    
    public URI getAddress() {
        return this.address;
    }

    /**
     * Specifies the {@link java.net.URI} address.
     *
     * @param       address     specified address
     */
    
    public void setAddress(URI address) {
        if (address != null) {
            if (address.getPort() == Default.INVALID_PORT) {
                URI u = Util.toURI(address.getScheme(), address.getHost(),
                    Default.MINIMUM_DYNAMIC_PORT);

                if (u != null) {
                    address = u;
                }
            }

            if (Util.validateAddress(address, false).trim().length() > 0) {
                throw new IllegalArgumentException("invalid adress: " + address);
            }
        }

        this.address = address;
    }

    /**
     * Accessor to the address port range.
     *
     * @return          the port range
     */
    
    public int getPortRange() {
        return this.range;
    }

    /**
     * Specifies the port range.
     *
     * @param   range       port range
     */
    
    public void setPortRange(int range) {
        if (range > Default.INVALID_PORT &&
            range <= Default.MAXIMUM_PORT) {
            this.range = range;
        }
    }

    /**
     * Equality validator.
     *
     * @param   o   specified comparitor
     * @return      equality results
     */
    
    public boolean equals(Object o) {
        return (o instanceof Address &&
            ((o != null &&
                (((Address)o).getAddress() != null &&
                    ((Address)o).getAddress().equals(getAddress())) ||
                ((Address)o).getAddress() == null &&
                    getAddress() == null)) &&
            ((Address)o).getPortRange() == getPortRange());
    }

    /**
     * Accessor to the hashcode for this object.
     *
     * @return      computed hashcode value
     */
    
    public int hashCode() {
        int hash=this.range;

        if (this.address != null) {
            hash ^= address.hashCode();
        }

        return hash;
    }
}