001    /* URISyntax.java --
002       Copyright (C) 2003, 2005 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    package javax.print.attribute;
039    
040    import java.io.Serializable;
041    import java.net.URI;
042    
043    /**
044     * <code>URISyntax</code> is the abstract base class of all attribute
045     * classes having an Uniform Resource Identifier URI as value.
046     *
047     * @author Michael Koch (konqueror@gmx.de)
048     */
049    public abstract class URISyntax
050      implements Cloneable, Serializable
051    {
052      private static final long serialVersionUID = -7842661210486401678L;
053    
054      private URI uri;
055    
056      /**
057       * Creates a <code>URISyntax</code> object.
058       *
059       * @param uri the URI value for the syntax
060       *
061       * @exception NullPointerException if uri is null
062       */
063      protected URISyntax(URI uri)
064      {
065        if (uri == null)
066          throw new NullPointerException("uri may not be null");
067    
068        this.uri = uri;
069      }
070    
071      /**
072       * Tests if the given object is equal to this object.
073       *
074       * @param obj the object to test
075       *
076       * @return <code>true</code> if both objects are equal,
077       * <code>false</code> otherwise.
078       */
079      public boolean equals(Object obj)
080      {
081        if (! (obj instanceof URISyntax))
082          return false;
083    
084        return uri.equals(((URISyntax) obj).getURI());
085      }
086    
087      /**
088       * Returns the URI value of this syntax object.
089       *
090       * @return The URI.
091       */
092      public URI getURI()
093      {
094        return uri;
095      }
096    
097      /**
098       * Returns the hashcode for this object.
099       *
100       * @return The hashcode.
101       */
102      public int hashCode()
103      {
104        return uri.hashCode();
105      }
106    
107      /**
108       * Returns the string representation for this object.
109       *
110       * @return The string representation.
111       */
112      public String toString()
113      {
114        return uri.toString();
115      }
116    }