libjava/classpath/javax/print/attribute/standard/PrinterStateReasons.java

   1 /* PrinterStateReasons.java --
   2    Copyright (C) 2004, 2005 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package javax.print.attribute.standard;
  40
  41 import java.util.Collections;
  42 import java.util.HashMap;
  43 import java.util.HashSet;
  44 import java.util.Iterator;
  45 import java.util.Map;
  46 import java.util.Set;
  47
  48 import javax.print.attribute.PrintServiceAttribute;
  49
  50 /**
  51  * The <code>PrinterStateReasons</code> attribute provides the set of
  52  * additional informations available about the current state of the printer
  53  * device.
  54  * <p>
  55  * The attribute is basically a map with <code>PrinterStateReason</code>
  56  * objects as keys associated with their severity level as
  57  * <code>Severity</code> instances. The IPP keyword value can be
  58  * constructed as follows: <br>
  59  * <code>reason.toString() + '-' + severity.toString()</code>
  60  * </p>
  61  * <p>
  62  * <b>IPP Compatibility:</b> PrinterStateReasons is an IPP 1.1 attribute.
  63  * </p>
  64  * @see javax.print.attribute.standard.PrinterState
  65  * @see javax.print.attribute.standard.PrinterStateReason
  66  * @see javax.print.attribute.standard.Severity
  67  *
  68  * @author Michael Koch (konqueror@gmx.de)
  69  * @author Wolfgang Baer (WBaer@gmx.de)
  70  */
  71 public final class PrinterStateReasons extends HashMap
  72   implements PrintServiceAttribute
  73 {
  74   private static final long serialVersionUID = -3731791085163619457L;
  75
  76   /**
  77    * Constructs an empty <code>PrinterStateReasons</code> attribute.
  78    */
  79   public PrinterStateReasons()
  80   {
  81     super();
  82   }
  83
  84   /**
  85    * Constructs an empty <code>PrinterStateReasons</code> attribute
  86    * with the given initial capacity and load factor.
  87    *
  88    * @param initialCapacity the intial capacity.
  89    * @param loadFactor the load factor of the underlying HashMap.
  90    *
  91    * @throws IllegalArgumentException if initialCapacity &lt; 0
  92    * @throws IllegalArgumentException if initialCapacity or loadFactor &lt; 0
  93    */
  94   public PrinterStateReasons(int initialCapacity, float loadFactor)
  95   {
  96     super(initialCapacity, loadFactor);
  97   }
  98
  99   /**
 100    * Constructs an empty <code>PrinterStateReasons</code> attribute
 101    * with the given initial capacity and the default load factor.
 102    *
 103    * @param initialCapacity the intial capacity.
 104    *
 105    * @throws IllegalArgumentException if initialCapacity &lt; 0
 106    */
 107   public PrinterStateReasons(int initialCapacity)
 108   {
 109     super(initialCapacity);
 110   }
 111
 112   /**
 113    * Constructs a <code>PrinterStateReasons</code> attribute
 114    * with the given content of the map.
 115    *
 116    * @param map the map for the initial values with the same
 117    * <code>PrinterStateReason</code> to <code>Severity</code> mappings.
 118    *
 119    * @throws NullPointerException if map or any key/value is <code>null</code>.
 120    * @throws ClassCastException if values of map are not of type
 121    * <code>PrinterStateReason</code> and keys are not of type
 122    * <code>Severity</code>.
 123    */
 124   public PrinterStateReasons(Map map)
 125   {
 126     super(map.size(), 0.75f);
 127     Iterator it = map.entrySet().iterator();
 128     while (it.hasNext())
 129       {
 130         Map.Entry entry = (Map.Entry) it.next();
 131         put(entry.getKey(), entry.getValue());
 132       }
 133   }
 134
 135   /**
 136    * Constructs an unmodifiable view of the contained printer state reasons
 137    * associated with the given severity level.
 138    *
 139    * @param severity the severity level for the constructed set.
 140    * @return The set of printer state reasons.
 141    */
 142   public Set printerStateReasonSet(Severity severity)
 143   {
 144     if (severity == null)
 145       throw new NullPointerException("severity is null");
 146
 147     HashSet set = new HashSet();
 148     Iterator it = entrySet().iterator();
 149     while (it.hasNext())
 150       {
 151         Map.Entry entry = (Map.Entry) it.next();
 152         if (entry.getValue().equals(severity))
 153           set.add(entry.getKey());
 154       }
 155
 156     return Collections.unmodifiableSet(set);
 157   }
 158
 159   /**
 160    * Puts the given reason object associated with the given severity object
 161    * into the set.
 162    *
 163    * @param reason the reason of type <code>PrinterStateReason</code>.
 164    * @param severity the severity of the reason of type <code>Severity</code>.
 165    *
 166    * @return The previously associated severity of the reason or
 167    * <code>null</code> if the reason object was not in the map before.
 168    *
 169    * @throws NullPointerException if any of the values is <code>null</code>.
 170    * @throws ClassCastException if reason is not a
 171    * <code>PrinterStateReason</code> and severity is not a
 172    * <code>Severity</code> instance.
 173    */
 174   public Object put(Object reason, Object severity)
 175   {
 176     if (reason == null)
 177       throw new NullPointerException("reason is null");
 178     if (severity == null)
 179       throw new NullPointerException("severity is null");
 180
 181     return put((PrinterStateReason) reason, (Severity) severity);
 182   }
 183
 184   /**
 185    * Returns category of this class.
 186    *
 187    * @return The class <code>PrintStateReasons</code> itself.
 188    */
 189   public Class getCategory()
 190   {
 191     return PrinterStateReasons.class;
 192   }
 193
 194   /**
 195    * Returns the name of this attribute.
 196    *
 197    * @return The name "printer-state-reasons".
 198    */
 199   public String getName()
 200   {
 201     return "printer-state-reasons";
 202   }
 203 }