Source Code Cross Referenced for Node.java in  » Database-DBMS » hsql » org » hsqldb » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » Database DBMS » hsql » org.hsqldb 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /* Copyright (c) 1995-2000, The Hypersonic SQL Group.
002:         * All rights reserved.
003:         *
004:         * Redistribution and use in source and binary forms, with or without
005:         * modification, are permitted provided that the following conditions are met:
006:         *
007:         * Redistributions of source code must retain the above copyright notice, this
008:         * list of conditions and the following disclaimer.
009:         *
010:         * Redistributions in binary form must reproduce the above copyright notice,
011:         * this list of conditions and the following disclaimer in the documentation
012:         * and/or other materials provided with the distribution.
013:         *
014:         * Neither the name of the Hypersonic SQL Group nor the names of its
015:         * contributors may be used to endorse or promote products derived from this
016:         * software without specific prior written permission.
017:         *
018:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019:         * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020:         * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021:         * ARE DISCLAIMED. IN NO EVENT SHALL THE HYPERSONIC SQL GROUP,
022:         * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
023:         * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
024:         * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025:         * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
026:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027:         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028:         * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029:         *
030:         * This software consists of voluntary contributions made by many individuals 
031:         * on behalf of the Hypersonic SQL Group.
032:         *
033:         *
034:         * For work added by the HSQL Development Group:
035:         *
036:         * Copyright (c) 2001-2005, The HSQL Development Group
037:         * All rights reserved.
038:         *
039:         * Redistribution and use in source and binary forms, with or without
040:         * modification, are permitted provided that the following conditions are met:
041:         *
042:         * Redistributions of source code must retain the above copyright notice, this
043:         * list of conditions and the following disclaimer.
044:         *
045:         * Redistributions in binary form must reproduce the above copyright notice,
046:         * this list of conditions and the following disclaimer in the documentation
047:         * and/or other materials provided with the distribution.
048:         *
049:         * Neither the name of the HSQL Development Group nor the names of its
050:         * contributors may be used to endorse or promote products derived from this
051:         * software without specific prior written permission.
052:         *
053:         * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
054:         * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
055:         * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
056:         * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
057:         * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
058:         * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
059:         * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
060:         * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
061:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
062:         * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
063:         * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
064:         */
065:
066:        package org.hsqldb;
067:
068:        import java.io.IOException;
069:
070:        import org.hsqldb.rowio.RowInputInterface;
071:        import org.hsqldb.rowio.RowOutputInterface;
072:
073:        // fredt@users 20020221 - patch 513005 by sqlbob@users (RMP)
074:        // fredt@users 20020920 - path 1.7.1 - refactoring to cut mamory footprint
075:        // fredt@users 20021205 - path 1.7.2 - enhancements
076:        // fredt@users 20021215 - doc 1.7.2 - javadoc comments
077:
078:        /**
079:         *  The parent for all AVL node implementations, features factory methods for
080:         *  its subclasses. Subclasses of Node vary in the way they hold
081:         *  references to other Nodes in the AVL tree, or to their Row data.<br>
082:         *
083:         *  nNext links the Node objects belonging to different indexes for each
084:         *  table row. It is used solely by Row to locate the node belonging to a
085:         *  particular index.
086:         *
087:         *
088:         * @author Thomas Mueller (Hypersonic SQL Group)
089:         * @version 1.7.2
090:         * @since Hypersonic SQL
091:         */
092:        abstract class Node {
093:
094:            static final int NO_POS = CachedRow.NO_POS;
095:            int iBalance; // currently, -2 means 'deleted'
096:            Node nNext; // node of next index (nNext==null || nNext.iId=iId+1)
097:
098:            static final Node newNode(Row r, int id, Table t) {
099:
100:                switch (t.getIndexType()) {
101:
102:                case Index.MEMORY_INDEX:
103:                    return new MemoryNode(r);
104:
105:                case Index.POINTER_INDEX:
106:                    return new PointerNode((CachedRow) r, id);
107:
108:                case Index.DISK_INDEX:
109:                default:
110:                    return new DiskNode((CachedRow) r, id);
111:                }
112:            }
113:
114:            static final Node newNode(Row r, RowInputInterface in, int id,
115:                    Table t) throws IOException, HsqlException {
116:
117:                switch (t.getIndexType()) {
118:
119:                case Index.MEMORY_INDEX:
120:                    return new MemoryNode(r);
121:
122:                case Index.POINTER_INDEX:
123:                    return new PointerNode((CachedRow) r, id);
124:
125:                case Index.DISK_INDEX:
126:                default:
127:                    return new DiskNode((CachedRow) r, in, id);
128:                }
129:            }
130:
131:            /**
132:             *  This method unlinks the Node from the other Nodes in the same Index
133:             *  and from the Row.
134:             *
135:             *  It must keep the links between the Nodes in different Indexes.
136:             */
137:            abstract void delete();
138:
139:            /**
140:             *  File offset of Node. Used with CachedRow objects only
141:             */
142:            abstract int getKey();
143:
144:            /**
145:             *  Return the Row Object that is linked to this Node.
146:             */
147:            abstract Row getRow() throws HsqlException;
148:
149:            /**
150:             *  Getters and setters for AVL index operations.
151:             */
152:            abstract boolean isLeft(Node node) throws HsqlException;
153:
154:            abstract boolean isRight(Node node) throws HsqlException;
155:
156:            abstract Node getLeft() throws HsqlException;
157:
158:            abstract void setLeft(Node n) throws HsqlException;
159:
160:            abstract Node getRight() throws HsqlException;
161:
162:            abstract void setRight(Node n) throws HsqlException;
163:
164:            abstract Node getParent() throws HsqlException;
165:
166:            abstract void setParent(Node n) throws HsqlException;
167:
168:            final int getBalance() throws HsqlException {
169:
170:                if (Trace.DOASSERT) {
171:                    Trace.doAssert(iBalance != -2);
172:                }
173:
174:                return iBalance;
175:            }
176:
177:            abstract void setBalance(int b) throws HsqlException;
178:
179:            abstract boolean isRoot();
180:
181:            abstract boolean isFromLeft() throws HsqlException;
182:
183:            /**
184:             *  Returns the database table data for this Node
185:             *
186:             */
187:            abstract Object[] getData() throws HsqlException;
188:
189:            abstract boolean equals(Node n);
190:
191:            /**
192:             *  Returns the Node Object that currently represents this Node in the
193:             *  AVL index structure. In current implementations of Node this is
194:             *  always the same as the this Object for MEMORY and TEXT tables but can
195:             *  be a different Object for CACHED tables, where DiskNode Objects may
196:             *  be freed from the Cache. Calling this method returns a Node with
197:             *  currently valid pointers to its linked AVL Nodes.
198:             *
199:             */
200:            Node getUpdatedNode() throws HsqlException {
201:                return this ;
202:            }
203:
204:            /**
205:             *  Writes out the node in an implementation dependent way.
206:             */
207:            abstract void write(RowOutputInterface out) throws IOException;
208:
209:            boolean isDeleted() {
210:                return iBalance == -2;
211:            }
212:        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.