A plug-in based, extensible database solution. 1) Performs powerful object relational Database mapping. 2) Supports CRUD operations on database data. 3) Supports CRUD operations on database schema (can programmatically create Database table modify Database table definition). 4) Tracing module supports CRUD operation on historical data. 5) Security module supports applying CRUD permissions on data. 6) Supports full text search. 7) Supports MS SQL Server, MySQL, PostgreSQL, Oracle and Derby.

1. CoreDB
A plug-in based, extensible database solution.
By Huangtao (Sean) Xiong (Now Research Engineer at NICTA)
Xu Zhao (Now Software Engineer at Ryarc Digital)
Van Munin Chhieng (Now Software Engineer at MQ Group)
Service Oriented Computing Research Group
School of Computer Science And Engineering

2. Architecture

3. Overview
 Performs powerful object relational mapping.
 Offers developers:
 Query on databases – CoreDB Base
 Trace historical data – CoreDB Tracing
 Apply security policies – CoreDB Security
 And do fulltext search – CoreDB FulltextSearch
programmatically.

4. CoreDB Object Relational Mapping
 Abstracts relational databases to java objects:
 Database – DatabaseSchema
 DB tables – EntityClass
 DB table column – AttributeClass
 Table data row – EntityInstance
 Easily build DB connection and generate DB mapping
By creating EntityController Object
String path = “credential.txt”; // stores DB connection parameters
IEntityController iec= new EntityController(path);
 No Mapping configuration file, all mappings stored in memory
 No table beans and daos will be generated
Get Table definition object by calling EntityClass ec = iec.getEntityClass(tableName);
Get Table columns object by calling ec.getAttributeClasses();
Or get particular column: iec.getAttributeClass(tableName, columnName);

5. CoreDB Base
Query on Database (CRUD Operations)
 CRUD on Data:
CoreDB Base offers developers to create, read, update
and delete data rows and do joins among tables
programmatically.
 CRUD on Data Schema:
CoreDB Base offers developers to create tables, get table
definitions, update tables (add/update/delete columns)
and delete tables programmatically

6. Example – Create a data row
 // set the table name
String tableName = “the name of table”;
 // create entity instance object for the table
EntityInstance entity = iec.createEntityInstanceFor(tableName);
 // to set the value of columns
entity.set(columnName, columnValue);
 //for example, set value for a string type column 'FirstName'
entity.set("FirstName", “John”);
 // Insert into DB
iec.createEntity(entity);

7. Example – Create a table
 // Create a list of AttributeClasses (Columns)
List<AttributeClass> acl = new LinkedList<AttributeClass>();
AttributeClass ac = AttributeClass(“ColumnName”, Integer.class);
ac. setPrimaryKey(true); ac. setAutoIncrement(true);
acl.add(ac);
 // Create index for table
List<IndexClass> icl = new LinkedList<IndexClass>();
IndexClass indexClass = new IndexClass(ac, true); // true means unique index
icl.add(indexClass);
 // Create an EntityClass Object (table)
EntityClass ec = new EntityClass(“TableName”, acl, icl);
 // Create table in DB
iec.deployDefinition(ec);

8. CoreDB Tracing
 Extends CoreDB Base
 Developers can read all the historical data and know
who is the operator for every data modification
 Can be easily applied on existing Data tables.
By calling iec.initializeMode(true, Mode.TRACING);
 Do not do any modification on existing Data tables
 Can be easily de-tracing – remove tracing.

9. User Case
John Simth is the CEO of company A and he has been worked in A for 12
years. He was promoted twice from Manager to Director (in 2000) and
then CEO (in 2004) over the past 12 years.
HR's record in data table 'employee'
ID FN LN DOB Address Tel Title Salary Start date
001 John Simth 13/07/1963 Queens st 1234567 CEO 500 k 02/02/1999

10. User Case with Tracing
HR's record in data table 'employee'
ID FN LN DOB Address Tel Title Salary Start date
001 John Simth 13/07/1963 Queens st 1234567 CEO 500 k 02/02/1999
HR's tracing record (between 01/01/1999 and currnet)
ID FN LN DOB Address Tel Title Salary Start date Last Last
Updated Update
By Date
001 John Simth 13/07/1963 Queens st 1234567 CEO 500 k 02/02/1999 Linda 04/04/2004
001 John Simth 13/07/1963 King st 1234567 Director 300 k 02/02/1999 Linda 02/02/2001
001 John Simth 13/07/1963 Park St 1234567 Manager 150 k 02/02/1999 Linda 02/02/1999

11. CoreDB Security
 Extends CoreDB Base
 Offers data access controlling (CRUD)
 Controlling on users
User group level

 user level
 Security on Data
Data rows

 Table columns
 Can be easily applied on existing Data tables.
By calling iec.initializeMode(true, Mode.SECURITY);
 Do not do any modification on existing Data tables
 Can be easily removed

12. User Case with Security
HR's record in data table 'employee' (Viewed by HR Administrator)
ID FN LN DOB Address Tel Title Salary Start date
001 John Simth 13/07/1963 Queens st 1234567 CEO *** 02/02/1999
HR's record in data table 'employee' (Viewed by Payroll Adviser)
ID FN LN DOB Address Tel Title Salary Start date
001 John Simth *** Queens st 1234567 CEO 500 k 02/02/1999
HR's record in data table 'employee' (Viewed by other employees)
ID FN LN DOB Address Tel Title Salary Start date
001 John Simth *** *** 1234567 CEO *** 02/02/1999

13. CoreDB Fulltext Search
 Extends CoreDB Base
 Applies Fulltextsearch on tables OR table columns
 Index data can be stored in DB, File or Memory
 Easily build FTS index and remove FTS index
 Supports CUD operations with index
 Supports FUZZ read and result Entities will be sorted by
similarity
 Compatible with Luence Query Syntax

14. What's the next?
 CoreDB DataCube
 Researcheres and Engineers in SOC are working on
CoreDB extensions
 Probably will be open source soon????

15. Thank you!
Questions are welcome!!