/* PrinterStateReasons.java --
   Copyright (C) 2004, 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the 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, but
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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this exception to your version of the library, but you are not
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package javax.print.attribute.standard;

import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import javax.print.attribute.PrintServiceAttribute;

/**
 * The <code>PrinterStateReasons</code> attribute provides the set of 
 * additional informations available about the current state of the printer 
 * device.
 * <p>
 * The attribute is basically a map with <code>PrinterStateReason</code>
 * objects as keys associated with their severity level as 
 * <code>Severity</code> instances. The IPP keyword value can be 
 * constructed as follows: <br>
 * <code>reason.toString() + '-' + severity.toString()</code> 
 * </p>
 * <p>
 * <b>IPP Compatibility:</b> PrinterStateReasons is an IPP 1.1 attribute.
 * </p>
 * @see javax.print.attribute.standard.PrinterState
 * @see javax.print.attribute.standard.PrinterStateReason
 * @see javax.print.attribute.standard.Severity
 * 
 * @author Michael Koch (konqueror@gmx.de)
 * @author Wolfgang Baer (WBaer@gmx.de)
 */
public final class PrinterStateReasons extends HashMap
  implements PrintServiceAttribute
{
  private static final long serialVersionUID = -3731791085163619457L;

  /**
   * Constructs an empty <code>PrinterStateReasons</code> attribute.
   */  
  public PrinterStateReasons()
  {
    super();
  }

  /**
   * Constructs an empty <code>PrinterStateReasons</code> attribute
   * with the given initial capacity and load factor.
   * 
   * @param initialCapacity the intial capacity.
   * @param loadFactor the load factor of the underlying HashMap.
   * 
   * @throws IllegalArgumentException if initialCapacity &lt; 0
   * @throws IllegalArgumentException if initialCapacity or loadFactor &lt; 0
   */
  public PrinterStateReasons(int initialCapacity, float loadFactor)
  {
    super(initialCapacity, loadFactor);
  }

  /**
   * Constructs an empty <code>PrinterStateReasons</code> attribute
   * with the given initial capacity and the default load factor.
   * 
   * @param initialCapacity the intial capacity.
   * 
   * @throws IllegalArgumentException if initialCapacity &lt; 0
   */
  public PrinterStateReasons(int initialCapacity)
  {
    super(initialCapacity);
  }

  /**
   * Constructs a <code>PrinterStateReasons</code> attribute
   * with the given content of the map.
   * 
   * @param map the map for the initial values with the same 
   * <code>PrinterStateReason</code> to <code>Severity</code> mappings.
   * 
   * @throws NullPointerException if map or any key/value is <code>null</code>.
   * @throws ClassCastException if values of map are not of type 
   * <code>PrinterStateReason</code> and keys are not of type 
   * <code>Severity</code>.
   */
  public PrinterStateReasons(Map map)
  {
    super(map.size(), 0.75f);
    Iterator it = map.entrySet().iterator();
    while (it.hasNext())
      {
        Map.Entry entry = (Map.Entry) it.next();
        put(entry.getKey(), entry.getValue());
      }
  }

  /**
   * Constructs an unmodifiable view of the contained printer state reasons
   * associated with the given severity level.
   * 
   * @param severity the severity level for the constructed set.
   * @return The set of printer state reasons.
   */
  public Set printerStateReasonSet(Severity severity)
  {
    if (severity == null)
      throw new NullPointerException("severity is null");
    
    HashSet set = new HashSet();
    Iterator it = entrySet().iterator();
    while (it.hasNext())
      {
        Map.Entry entry = (Map.Entry) it.next();
        if (entry.getValue().equals(severity))
          set.add(entry.getKey());
      }
    
    return Collections.unmodifiableSet(set);
  }
  
  /**
   * Puts the given reason object associated with the given severity object
   * into the set.
   * 
   * @param reason the reason of type <code>PrinterStateReason</code>.
   * @param severity the severity of the reason of type <code>Severity</code>.
   * 
   * @return The previously associated severity of the reason or 
   * <code>null</code> if the reason object was not in the map before.
   * 
   * @throws NullPointerException if any of the values is <code>null</code>.
   * @throws ClassCastException if reason is not a 
   * <code>PrinterStateReason</code> and severity is not a 
   * <code>Severity</code> instance.
   */
  public Object put(Object reason, Object severity)
  {
    if (reason == null)
      throw new NullPointerException("reason is null");    
    if (severity == null)
      throw new NullPointerException("severity is null");
    
    return super.put((PrinterStateReason) reason, (Severity) severity);
  }   
  
  /**
   * Returns category of this class.
   *
   * @return The class <code>PrintStateReasons</code> itself.
   */
  public Class getCategory()
  {
    return PrinterStateReasons.class;
  }

  /**
   * Returns the name of this attribute.
   *
   * @return The name "printer-state-reasons".
   */
  public String getName()
  {
    return "printer-state-reasons";
  }
}