KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > hsqldb > DatabaseObjectNames


1 /* Copyright (c) 2001-2005, The HSQL Development Group
2  * All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  *
7  * Redistributions of source code must retain the above copyright notice, this
8  * list of conditions and the following disclaimer.
9  *
10  * Redistributions in binary form must reproduce the above copyright notice,
11  * this list of conditions and the following disclaimer in the documentation
12  * and/or other materials provided with the distribution.
13  *
14  * Neither the name of the HSQL Development Group nor the names of its
15  * contributors may be used to endorse or promote products derived from this
16  * software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
22  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */

30
31
32 package org.hsqldb;
33
34 import org.hsqldb.HsqlNameManager.HsqlName;
35 import org.hsqldb.lib.HashMap;
36 import org.hsqldb.lib.Iterator;
37
38 /**
39  * Transitional container for object names that are unique across the
40  * DB instance but are owned by different DB objects. Currently names for
41  * Index and Trigger objects.<p>
42  *
43  * @author fredt@users
44  * @version 1.7.2
45  * @since 1.7.2
46  */

47 class DatabaseObjectNames {
48
49     HashMap nameList = new HashMap();
50
51     DatabaseObjectNames() {}
52
53     boolean containsName(String JavaDoc name) {
54         return nameList.containsKey(name);
55     }
56
57     HsqlName getOwner(String JavaDoc name) {
58         return (HsqlName) nameList.get(name);
59     }
60
61     void addName(String JavaDoc name, HsqlName owner,
62                  int errorcode) throws HsqlException {
63
64         // should not contain name
65
if (containsName(name)) {
66             throw Trace.error(errorcode, name);
67         }
68
69         nameList.put(name, owner);
70     }
71
72     void rename(String JavaDoc name, String JavaDoc newname,
73                 int errorcode) throws HsqlException {
74
75         HsqlName owner = (HsqlName) nameList.get(name);
76
77         addName(newname, owner, errorcode);
78         nameList.remove(name);
79     }
80
81     Object JavaDoc removeName(String JavaDoc name) throws HsqlException {
82
83         Object JavaDoc owner = nameList.remove(name);
84
85         if (owner == null) {
86
87             // should contain name
88
throw Trace.error(Trace.GENERAL_ERROR);
89         }
90
91         return owner;
92     }
93
94     void removeOwner(HsqlName owner) {
95
96         Iterator it = nameList.values().iterator();
97
98         while (it.hasNext()) {
99             Object JavaDoc currentvalue = it.next();
100
101             if (owner.equals(currentvalue)) {
102                 it.remove();
103             }
104         }
105     }
106 }
107
Popular Tags