1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org |
2 | * |
3 | * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. |
4 | * |
5 | * "Hilbert II" is free software; you can redistribute |
6 | * it and/or modify it under the terms of the GNU General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2 of the License, or (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | */ |
15 | |
16 | package org.qedeq.kernel.xml.handler.common; |
17 | |
18 | import java.text.DateFormat; |
19 | import java.text.ParseException; |
20 | import java.text.SimpleDateFormat; |
21 | import java.util.Date; |
22 | import java.util.HashMap; |
23 | import java.util.Iterator; |
24 | import java.util.Map; |
25 | import java.util.SortedMap; |
26 | import java.util.TreeMap; |
27 | |
28 | |
29 | /** |
30 | * Value object that contains unsorted key value pairs. Both arguments are string type, but there |
31 | * are access methods for different data types. If the type conversion in not possible an |
32 | * appropriate {@link RuntimeException} is thrown. |
33 | * <p> |
34 | * With {@link #add} another key value pair is added. An {@link IllegalArgumentException} is thrown, |
35 | * if the key is already known. |
36 | * |
37 | * @author Michael Meyling |
38 | */ |
39 | public class SimpleAttributes { |
40 | |
41 | /** Key value storage. */ |
42 | private Map map = new HashMap(); |
43 | |
44 | /** |
45 | * Adds a key value pair. This key must be still unknown. |
46 | * |
47 | * @param key Key. |
48 | * @param value Value, maybe <code>null</code>. |
49 | */ |
50 | public final void add(final String key, final String value) { |
51 | if (map.containsKey(key)) { |
52 | throw new IllegalArgumentException( |
53 | "Key " + key + " already known with value: " + map.get(key)); |
54 | } |
55 | map.put(key, value); |
56 | } |
57 | |
58 | /** |
59 | * Returns the value for a key. If the key dosn't exist <code>null</code> is returned. |
60 | * |
61 | * @param key Key. |
62 | * @return Associated value. |
63 | */ |
64 | public final String getString(final String key) { |
65 | return (String) map.get(key); |
66 | } |
67 | |
68 | /** |
69 | * Returns the value for a key as an Integer. If the key dosn't exist |
70 | * <code>null</code> is returned. |
71 | * If the value must be transformable into an Integer value. |
72 | * |
73 | * @param key Key. |
74 | * @return Associated value converted into an Integer. |
75 | */ |
76 | public final Integer getInteger(final String key) { |
77 | String value = (String) map.get(key); |
78 | if (value != null) { |
79 | value = value.trim(); |
80 | } |
81 | if (value == null || value.length() == 0) { |
82 | return null; |
83 | } |
84 | return new Integer(value); |
85 | } |
86 | |
87 | /** |
88 | * Returns the value for a key as an Boolean. If the key dosn't exist |
89 | * <code>null</code> is returned. |
90 | * If the value must be transformable into an Boolean value. |
91 | * |
92 | * @param key Key. |
93 | * @return Associated value converted into an Boolean. |
94 | */ |
95 | public final Boolean getBoolean(final String key) { |
96 | String value = ((String) map.get(key)); |
97 | if (value != null) { |
98 | value = value.trim(); |
99 | } |
100 | if (value == null || value.length() == 0) { |
101 | return null; |
102 | } |
103 | return Boolean.valueOf(value); |
104 | } |
105 | |
106 | /** |
107 | * Returns the value for a key as an Date. If the key dosn't exist |
108 | * <code>null</code> is returned. |
109 | * If the value must be transformable into an Date value. |
110 | * The expected date format is "yyyy-MM-dd'T'HH:mm:ss". |
111 | * |
112 | * @param key Key. |
113 | * @return Associated value converted into an Date. |
114 | */ |
115 | public final Date getDate(final String key) { |
116 | String value = (String) map.get(key); |
117 | if (value != null) { |
118 | value = value.trim(); |
119 | } |
120 | if (value == null || value.length() == 0) { |
121 | return null; |
122 | } |
123 | try { |
124 | DateFormat formater = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss"); |
125 | Date date = formater.parse(value); |
126 | return date; |
127 | } catch (ParseException e) { |
128 | throw new IllegalArgumentException(e.toString()); |
129 | } |
130 | } |
131 | |
132 | /** |
133 | * Get the attribute values, sorted by their keys. |
134 | * |
135 | * @return Key sorted string values. |
136 | */ |
137 | public final String[] getKeySortedStringValues() { |
138 | SortedMap sorted = new TreeMap(map); |
139 | return (String[]) sorted.values().toArray(new String[0]); |
140 | } |
141 | |
142 | public String toString() { |
143 | final StringBuffer buffer = new StringBuffer(); |
144 | final Iterator iterator = map.entrySet().iterator(); |
145 | while (iterator.hasNext()) { |
146 | Map.Entry entry = (Map.Entry) iterator.next(); |
147 | buffer.append(entry.getKey() + "=\"" + entry.getValue() + "\" "); |
148 | } |
149 | return buffer.toString(); |
150 | } |
151 | |
152 | } |