001/* PrintServiceAttributeSet.java -- 
002   Copyright (C) 2003, 2005 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038package javax.print.attribute;
039
040/**
041 * <code>PrintServiceAttributeSet</code> specifies an attribute set which only
042 * allows printing attributes of type 
043 * {@link javax.print.attribute.PrintServiceAttribute}.
044 * <p>
045 * The methods {@link #add(Attribute)} and {@link #addAll(AttributeSet)} are
046 * respecified in this interface to indicate that only 
047 * <code>PrintServiceAttribute</code> instances are allowed in this set.
048 * </p>
049 * 
050 * @author Michael Koch (konqueror@gmx.de)
051 */
052public interface PrintServiceAttributeSet extends AttributeSet
053{
054  /**
055   * Adds the specified attribute value to this attribute set 
056   * if it is not already present.
057   * 
058   * This operation removes any existing attribute of the same category 
059   * before adding the given attribute. 
060   * 
061   * @param attribute the attribute to add.
062   * @return <code>true</code> if the set is changed, false otherwise.
063   * @throws ClassCastException if attribute is not of type 
064   * <code>PrintServiceAttribute</code>.
065   * @throws NullPointerException if the attribute is <code>null</code>.
066   * @throws UnmodifiableSetException if the set does not support modification.
067   */
068  boolean add (Attribute attribute);
069
070  /**
071   * Adds all of the elements in the specified set to this attribute set.
072   * 
073   * @param attributes the set of attributes to add.
074   * @return <code>true</code> if the set is changed, false otherwise.
075   * @throws ClassCastException if one of the attributes is not of type 
076   * <code>PrintServiceAttribute</code>.
077   * @throws UnmodifiableSetException if the set does not support modification.
078   * 
079   * @see #add(Attribute)
080   */
081  boolean addAll (AttributeSet attributes);
082}