1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
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24 */
25
26package javax.print.attribute.standard;
27
28import java.util.Collection;
29import java.util.HashSet;
30
31import javax.print.attribute.Attribute;
32import javax.print.attribute.PrintJobAttribute;
33
34/**
35 * Class {@code JobStateReasons} is a printing attribute class, a set of
36 * enumeration values, that provides additional information about the job's
37 * current state, i.e., information that augments the value of the job's
38 * {@link JobState JobState} attribute.
39 * <p>
40 * Instances of {@link JobStateReason JobStateReason} do not appear in a Print
41 * Job's attribute set directly. Rather, a {@code JobStateReasons} attribute
42 * appears in the Print Job's attribute set. The {@code JobStateReasons}
43 * attribute contains zero, one, or more than one
44 * {@link JobStateReason JobStateReason} objects which pertain to the Print
45 * Job's status. The printer adds a {@link JobStateReason JobStateReason} object
46 * to the Print Job's JobStateReasons attribute when the corresponding condition
47 * becomes true of the Print Job, and the printer removes the
48 * {@link JobStateReason JobStateReason} object again when the corresponding
49 * condition becomes false, regardless of whether the Print Job's overall
50 * {@link JobState JobState} also changed.
51 * <p>
52 * Class {@code JobStateReasons} inherits its implementation from class
53 * {@link HashSet java.util.HashSet}. Unlike most printing attributes
54 * which are immutable once constructed, class {@code JobStateReasons} is
55 * designed to be mutable; you can add {@link JobStateReason JobStateReason}
56 * objects to an existing {@code JobStateReasons} object and remove them again.
57 * However, like class {@link HashSet java.util.HashSet}, class
58 * {@code JobStateReasons} is not multiple thread safe. If a
59 * {@code JobStateReasons} object will be used by multiple threads, be sure to
60 * synchronize its operations (e.g., using a synchronized set view obtained
61 * from class {@link java.util.Collections java.util.Collections}).
62 * <p>
63 * <b>IPP Compatibility:</b> The string value returned by each individual
64 * {@link JobStateReason JobStateReason} object's {@code toString()} method
65 * gives the IPP keyword value. The category name returned by {@code getName()}
66 * gives the IPP attribute name.
67 *
68 * @author Alan Kaminsky
69 */
70public final class JobStateReasons
71    extends HashSet<JobStateReason> implements PrintJobAttribute {
72
73    /**
74     * Use serialVersionUID from JDK 1.4 for interoperability.
75     */
76    private static final long serialVersionUID = 8849088261264331812L;
77
78    /**
79     * Construct a new, empty job state reasons attribute; the underlying hash
80     * set has the default initial capacity and load factor.
81     */
82    public JobStateReasons() {
83        super();
84    }
85
86    /**
87     * Construct a new, empty job state reasons attribute; the underlying hash
88     * set has the given initial capacity and the default load factor.
89     *
90     * @param  initialCapacity initial capacity
91     * @throws IllegalArgumentException if the initial capacity is negative
92     */
93    public JobStateReasons(int initialCapacity) {
94        super (initialCapacity);
95    }
96
97    /**
98     * Construct a new, empty job state reasons attribute; the underlying hash
99     * set has the given initial capacity and load factor.
100     *
101     * @param  initialCapacity initial capacity
102     * @param  loadFactor load factor
103     * @throws IllegalArgumentException if the initial capacity is negative
104     */
105    public JobStateReasons(int initialCapacity, float loadFactor) {
106        super (initialCapacity, loadFactor);
107    }
108
109    /**
110     * Construct a new job state reasons attribute that contains the same
111     * {@link JobStateReason JobStateReason} objects as the given collection.
112     * The underlying hash set's initial capacity and load factor are as
113     * specified in the superclass constructor
114     * {@link HashSet#HashSet(Collection) HashSet(Collection)}.
115     *
116     * @param  collection collection to copy
117     * @throws NullPointerException if {@code collection} is {@code null} or if
118     *         any element in {@code collection} is {@code null}
119     * @throws ClassCastException if any element in {@code collection} is not an
120     *         instance of class {@link JobStateReason JobStateReason}
121     */
122    public JobStateReasons(Collection<JobStateReason> collection) {
123        super (collection);
124    }
125
126    /**
127     * Adds the specified element to this job state reasons attribute if it is
128     * not already present. The element to be added must be an instance of class
129     * {@link JobStateReason JobStateReason}. If this job state reasons
130     * attribute already contains the specified element, the call leaves this
131     * job state reasons attribute unchanged and returns {@code false}.
132     *
133     * @param  o element to be added to this job state reasons attribute
134     * @return {@code true} if this job state reasons attribute did not already
135     *         contain the specified element
136     * @throws NullPointerException if the specified element is {@code null}
137     * @throws ClassCastException if the specified element is not an instance of
138     *         class {@link JobStateReason JobStateReason}
139     * @since 1.5
140     */
141    public boolean add(JobStateReason o) {
142        if (o == null) {
143            throw new NullPointerException();
144        }
145        return super.add(o);
146    }
147
148    /**
149     * Get the printing attribute class which is to be used as the "category"
150     * for this printing attribute value.
151     * <p>
152     * For class {@code JobStateReasons}, the category is class
153     * JobStateReasons itself.
154     *
155     * @return printing attribute class (category), an instance of class
156     *         {@link Class java.lang.Class}
157     */
158    public final Class<? extends Attribute> getCategory() {
159        return JobStateReasons.class;
160    }
161
162    /**
163     * Get the name of the category of which this attribute value is an
164     * instance.
165     * <p>
166     * For class JobStateReasons, the category name is
167     * {@code "job-state-reasons"}.
168     *
169     * @return attribute category name
170     */
171    public final String getName() {
172        return "job-state-reasons";
173    }
174}
175