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Java > Open Source Codes > org > apache > jetspeed > om > registry > base > BaseSecurityRegistry


1 /*
2  * Copyright 2000-2001,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */

16
17 package org.apache.jetspeed.om.registry.base;
18
19 import java.io.ByteArrayInputStream JavaDoc;
20 import java.io.ByteArrayOutputStream JavaDoc;
21 import java.io.ObjectInputStream JavaDoc;
22 import java.io.ObjectOutputStream JavaDoc;
23
24 import org.apache.jetspeed.om.registry.RegistryEntry;
25 import org.apache.jetspeed.om.registry.InvalidEntryException;
26 import org.apache.jetspeed.om.registry.RegistryException;
27 import org.apache.jetspeed.om.registry.SecurityEntry;
28 import org.apache.jetspeed.services.Registry;
29 import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
30 import org.apache.jetspeed.services.logging.JetspeedLogger;
31
32 /**
33  * Extends BaseRegistry implementation to override object creation
34  * method and ensure Registry object is synchronized with its
35  * persistence backend by delegating actual addition/deletion of objects
36  * to the registry service.
37  * <p>To avoid loops, a RegistryService implementation using this class
38  * nees to call the addLocalEntry/removeLocalEntry methods to modify
39  * the in memory state of this Registry</p>
40  *
41  * @author <a HREF="mailto:raphael@apache.org">Raphaėl Luta</a>
42  * @version $Id: BaseSecurityRegistry.java,v 1.6 2004/02/23 03:08:26 jford Exp $
43  */

44 public class BaseSecurityRegistry extends BaseRegistry
45 {
46
47     /**
48      * Static initialization of the logger for this class
49      */

50     private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(BaseSecurityRegistry.class.getName());
51     
52     /**
53     @see Registry#setEntry
54     */

55     public void setEntry( RegistryEntry entry ) throws InvalidEntryException
56     {
57         // Delegate to the RegistryService to ensure correct handling of
58
// persistence if using file fragments
59

60         try
61         {
62             Registry.addEntry(Registry.SECURITY, entry);
63         }
64         catch (RegistryException e)
65         {
66             logger.error("Exception", e);
67         }
68     }
69
70     /**
71     @see Registry#addEntry
72     */

73     public void addEntry( RegistryEntry entry ) throws InvalidEntryException
74     {
75         // Delegate to the RegistryService to ensure correct handling of
76
// persistence if using file fragments
77

78         try
79         {
80             Registry.addEntry(Registry.SECURITY, entry);
81         }
82         catch (RegistryException e)
83         {
84             logger.error("Exception", e);
85         }
86     }
87
88     /**
89     @see Registry#removeEntry
90     */

91     public void removeEntry( String JavaDoc name )
92     {
93         // Delegate to the RegistryService to ensure correct handling of
94
// persistence if using file fragments
95

96         Registry.removeEntry(Registry.SECURITY, name);
97     }
98
99     /**
100     @see Registry#removeEntry
101     */

102     public void removeEntry( RegistryEntry entry )
103     {
104         // Delegate to the RegistryService to ensure correct handling of
105
// persistence if using file fragments
106

107         if (entry != null)
108         {
109             Registry.removeEntry(Registry.SECURITY, entry.getName());
110         }
111     }
112
113     /**
114      * Creates a new RegistryEntry instance compatible with the current
115      * Registry instance implementation
116      *
117      * @return the newly created RegistryEntry
118      */

119     public RegistryEntry createEntry()
120     {
121         return new BaseSecurityEntry();
122     }
123     
124     /**
125      * returns a security entry from the registry based on the name provided
126      * @param String name Name of security entry we want.
127      * @return SecurityEntry SecurityEntry matching the <code>name</code>
128      * argument or null if no such entry exists.
129      */

130     public SecurityEntry getSecurityEntry(String JavaDoc name)
131     {
132         try
133         {
134             return (SecurityEntry) this.getEntry(name);
135         }
136         catch (InvalidEntryException e)
137         {
138             logger.error("Exception", e);
139         }
140
141         return null;
142     }
143
144     /**
145      * @return SecurityEntry a new SecurityEntry instance
146      */

147     public SecurityEntry createSecurityEntry()
148     {
149         return (SecurityEntry) this.createEntry();
150     }
151
152     /**
153      * Makes an exact copy of the named role, but changing the nmae attribute
154      * to the value of <code>newName</code>
155      * @param String original Name of the entry we want to clone
156      * @param String newName Name to give the cloned entry
157      * @return SecurityEntry The cloned entry.
158      */

159     public SecurityEntry cloneSecurityEntry(String JavaDoc original, String JavaDoc newName)
160     {
161         SecurityEntry baseEntry = getSecurityEntry(original);
162         if (baseEntry != null)
163         {
164             SecurityEntry newEntry = cloneEntry(baseEntry);
165             newEntry.setName(newName);
166             return newEntry;
167         }
168
169         return null;
170     }
171     
172
173     /**
174      * Makes an indentical copy of the SecurityEntry provided using
175      * serialize/de-serialize logic to make a clean reference
176      * @param SecurityEntry secEntry the entry to clone
177      * @return SecurityEntry the cloned entry.
178      */

179     private static SecurityEntry cloneEntry(SecurityEntry secEntry)
180     {
181         SecurityEntry clonedEntry = null;
182         try
183         {
184             ByteArrayOutputStream JavaDoc bytearrayoutputstream = new ByteArrayOutputStream JavaDoc(100);
185             ObjectOutputStream JavaDoc objectoutputstream = new ObjectOutputStream JavaDoc(bytearrayoutputstream);
186             objectoutputstream.writeObject(secEntry);
187             byte abyte0[] = bytearrayoutputstream.toByteArray();
188             objectoutputstream.close();
189             ByteArrayInputStream JavaDoc bytearrayinputstream = new ByteArrayInputStream JavaDoc(abyte0);
190             ObjectInputStream JavaDoc objectinputstream = new ObjectInputStream JavaDoc(bytearrayinputstream);
191             clonedEntry = (SecurityEntry) objectinputstream.readObject();
192             objectinputstream.close();
193         }
194         catch (Exception JavaDoc exception)
195         {
196             // nothing
197
}
198         return clonedEntry;
199     }
200 }
201
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