/* Reference.java --   Copyright (C) 2000, 2001, 2005  Free Software Foundation, Inc.This file is part of GNU Classpath.GNU Classpath is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe 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, butWITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNUGeneral Public License for more details.You should have received a copy of the GNU General Public Licensealong with GNU Classpath; see the file COPYING.  If not, write to theFree Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA02110-1301 USA.Linking this library statically or dynamically with other modules ismaking a combined work based on this library.  Thus, the terms andconditions of the GNU General Public License cover the wholecombination.As a special exception, the copyright holders of this library give youpermission to link this library with independent modules to produce anexecutable, regardless of the license terms of these independentmodules, and to copy and distribute the resulting executable underterms of your choice, provided that you also meet, for each linkedindependent module, the terms and conditions of the license of thatmodule.  An independent module is a module which is not derived fromor based on this library.  If you modify this library, you may extendthis exception to your version of the library, but you are notobligated to do so.  If you do not wish to do so, delete thisexception statement from your version. */package javax.naming;import java.io.Serializable;import java.util.Enumeration;import java.util.Vector;/** * @author Tom Tromey (tromey@redhat.com) * @date May 16, 2001 */public class Reference implements Cloneable, Serializable{  public Reference (String className)  {    this.className = className;    addrs = new Vector ();  }  public Reference (String className, RefAddr addr)  {    this.className = className;    addrs = new Vector ();    addrs.add (addr);  }  public Reference (String className, String factory, String factoryLocation)  {    this.className = className;    this.classFactory = factory;    this.classFactoryLocation = factoryLocation;    addrs = new Vector ();  }  public Reference (String className, RefAddr addr,		    String factory, String factoryLocation)  {    this.className = className;    this.classFactory = factory;    this.classFactoryLocation = factoryLocation;    addrs = new Vector ();    addrs.add (addr);  }  public void add (int posn, RefAddr addr)  {    addrs.add (posn, addr);  }  public void add (RefAddr addr)  {    addrs.add (addr);  }  public void clear ()  {    addrs.clear ();  }  public Object clone ()  {    Reference r = new Reference (className, classFactory,				 classFactoryLocation);    r.addrs = (Vector) addrs.clone ();    return r;  }  // Convenience function.  private boolean equals (String a, String b)  {    return (a == null) ? (b == null) : a.equals (b);  }  public boolean equals (Object obj)  {    if (! (obj instanceof Reference))      return false;    Reference r = (Reference) obj;    return (equals (classFactory, r.classFactory)	    && equals (classFactoryLocation, r.classFactoryLocation)	    && equals (className, r.className)	    && addrs.equals (r.addrs));  }  public RefAddr get (int posn)  {    return (RefAddr) addrs.get (posn);  }  public RefAddr get (String addrType)  {    for (int i = 0; i < addrs.size (); ++i)      {	RefAddr r = (RefAddr) addrs.get (i);	if (addrType.equals (r.getType ()))	  return r;      }    return null;  }  public Enumeration getAll ()  {    return addrs.elements ();  }  public String getClassName ()  {    return className;  }  public String getFactoryClassLocation ()  {    return classFactoryLocation;  }  public String getFactoryClassName ()  {    return classFactory;  }  public int hashCode ()  {    // The spec says the hash code is the sum of the hash codes of the    // addresses.  It does not mention the other fields.    int h = 0;    for (int i = 0; i < addrs.size (); ++i)      h += addrs.get (i).hashCode ();    return h;  }  public Object remove (int posn)  {    return addrs.remove (posn);  }  public int size ()  {    return addrs.size ();  }  public String toString ()  {    String x = getClass ().toString () + "[";    for (int i = 0; i < addrs.size (); ++i)      {	if (i > 0)	  x += ",";	x += addrs.get (i).toString ();      }    return x + "]";  }  protected Vector addrs;  protected String classFactory;  protected String classFactoryLocation;  protected String className;}