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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSimulator Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29using System.Collections;
30using System.Collections.Generic;
31using System.IO;
32using System.Text;
33using System.Xml;
34using System.Xml.Schema;
35using System.Xml.Serialization;
36using OpenMetaverse;
37using OpenMetaverse.StructuredData;
38
39namespace OpenSim.Framework
40{
41 /// <summary>
42 /// This class stores and retrieves dynamic attributes.
43 /// </summary>
44 /// <remarks>
45 /// Modules that want to use dynamic attributes need to do so in a private data store
46 /// which is accessed using a unique name. DAMap provides access to the data stores,
47 /// each of which is an OSDMap. Modules are free to store any type of data they want
48 /// within their data store. However, avoid storing large amounts of data because that
49 /// would slow down database access.
50 /// </remarks>
51 public class DAMap : IDictionary<string, OSDMap>, IXmlSerializable
52 {
53 private static readonly int MIN_STORE_NAME_LENGTH = 4;
54
55 protected OSDMap m_map;
56
57 public DAMap() { m_map = new OSDMap(); }
58
59 public XmlSchema GetSchema() { return null; }
60
61 public static DAMap FromXml(string rawXml)
62 {
63 DAMap map = new DAMap();
64 map.ReadXml(rawXml);
65 return map;
66 }
67
68 public void ReadXml(string rawXml)
69 {
70 // System.Console.WriteLine("Trying to deserialize [{0}]", rawXml);
71
72 lock (this)
73 m_map = (OSDMap)OSDParser.DeserializeLLSDXml(rawXml);
74 }
75
76 // WARNING: this is temporary for experimentation only, it will be removed!!!!
77 public OSDMap TopLevelMap
78 {
79 get { return m_map; }
80 set { m_map = value; }
81 }
82
83
84 public void ReadXml(XmlReader reader)
85 {
86 ReadXml(reader.ReadInnerXml());
87 }
88
89 public string ToXml()
90 {
91 lock (this)
92 return OSDParser.SerializeLLSDXmlString(m_map);
93 }
94
95 public void WriteXml(XmlWriter writer)
96 {
97 writer.WriteRaw(ToXml());
98 }
99
100 public void CopyFrom(DAMap other)
101 {
102 // Deep copy
103
104 string data = null;
105 lock (other)
106 {
107 if (other.Count > 0)
108 {
109 data = OSDParser.SerializeLLSDXmlString(other.m_map);
110 }
111 }
112
113 lock (this)
114 {
115 if (data == null)
116 Clear();
117 else
118 m_map = (OSDMap)OSDParser.DeserializeLLSDXml(data);
119 }
120 }
121
122 /// <summary>
123 /// Returns the number of data stores.
124 /// </summary>
125 public int Count { get { lock (this) { return m_map.Count; } } }
126
127 public bool IsReadOnly { get { return false; } }
128
129 /// <summary>
130 /// Returns the names of the data stores.
131 /// </summary>
132 public ICollection<string> Keys { get { lock (this) { return m_map.Keys; } } }
133
134 /// <summary>
135 /// Returns all the data stores.
136 /// </summary>
137 public ICollection<OSDMap> Values
138 {
139 get
140 {
141 lock (this)
142 {
143 List<OSDMap> stores = new List<OSDMap>(m_map.Count);
144 foreach (OSD llsd in m_map.Values)
145 stores.Add((OSDMap)llsd);
146 return stores;
147 }
148 }
149 }
150
151 /// <summary>
152 /// Gets or sets one data store.
153 /// </summary>
154 /// <param name="key">Store name</param>
155 /// <returns></returns>
156 public OSDMap this[string key]
157 {
158 get
159 {
160 OSD llsd;
161
162 lock (this)
163 {
164 if (m_map.TryGetValue(key, out llsd))
165 return (OSDMap)llsd;
166 else
167 return null;
168 }
169 }
170
171 set
172 {
173 ValidateKey(key);
174 lock (this)
175 m_map[key] = value;
176 }
177 }
178
179 /// <summary>
180 /// Validate the key used for storing separate data stores.
181 /// </summary>
182 /// <param name='key'></param>
183 private static void ValidateKey(string key)
184 {
185 if (key.Length < MIN_STORE_NAME_LENGTH)
186 throw new Exception("Minimum store name length is " + MIN_STORE_NAME_LENGTH);
187 }
188
189 public bool ContainsKey(string key)
190 {
191 lock (this)
192 return m_map.ContainsKey(key);
193 }
194
195 public void Add(string key, OSDMap store)
196 {
197 ValidateKey(key);
198 lock (this)
199 m_map.Add(key, store);
200 }
201
202 public void Add(KeyValuePair<string, OSDMap> kvp)
203 {
204 ValidateKey(kvp.Key);
205 lock (this)
206 m_map.Add(kvp.Key, kvp.Value);
207 }
208
209 public bool Remove(string key)
210 {
211 lock (this)
212 return m_map.Remove(key);
213 }
214
215 public bool TryGetValue(string key, out OSDMap store)
216 {
217 lock (this)
218 {
219 OSD llsd;
220 if (m_map.TryGetValue(key, out llsd))
221 {
222 store = (OSDMap)llsd;
223 return true;
224 }
225 else
226 {
227 store = null;
228 return false;
229 }
230 }
231 }
232
233 public void Clear()
234 {
235 lock (this)
236 m_map.Clear();
237 }
238
239 public bool Contains(KeyValuePair<string, OSDMap> kvp)
240 {
241 lock (this)
242 return m_map.ContainsKey(kvp.Key);
243 }
244
245 public void CopyTo(KeyValuePair<string, OSDMap>[] array, int index)
246 {
247 throw new NotImplementedException();
248 }
249
250 public bool Remove(KeyValuePair<string, OSDMap> kvp)
251 {
252 lock (this)
253 return m_map.Remove(kvp.Key);
254 }
255
256 public System.Collections.IDictionaryEnumerator GetEnumerator()
257 {
258 lock (this)
259 return m_map.GetEnumerator();
260 }
261
262 IEnumerator<KeyValuePair<string, OSDMap>> IEnumerable<KeyValuePair<string, OSDMap>>.GetEnumerator()
263 {
264 return null;
265 }
266
267 IEnumerator IEnumerable.GetEnumerator()
268 {
269 lock (this)
270 return m_map.GetEnumerator();
271 }
272 }
273} \ No newline at end of file