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Java library to remove Object/Relation Impedance

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Now stored at https://github.com/gregorydgraham/DBvolution

Available from Maven Central: nz.co.gregs.dbvolution

Makes relational data easy and fast to use with semantic annotations and encapsulated datatypes.

Simple declaration of a DB table:

public class MyTable extends DBRow {

private DBNumber numericCode = new DBNumber();
private DBNumber uidMyTable = new DBNumber();

Easy Gets:
List<MyTable> myRows = myDB.get(new MyTable());
MyTable row = myDB.getDBTable(new MyTable()).getByPrimaryKey(61176904);

Natural and Outer Joins and Criteria:
CarCo carCo = new CarCo();
List<DBQueryRow> results = myDB.get(carCo, new Marque());
dbQuery.addOptional(new CarModel());

Easy debugging:

Simple processing:
List<Marque> marques = query.getAll

DBvolution Web Site


  • Java objects all the time
  • Database abstracted and no SQL required
  • Aims to handle 99% of your everyday SQL without any SQL
  • Supports the other 1% of SQL by supporting views and queries just like tables
  • Automatically capture your schema whatever the size, tested on 800+ table/view schema
  • Add relational semantics into Java code without altering any code or the database
  • Query across multiple tables with as little as one line of code
  • Clear, concise query criteria
  • Automatically detects missing Primary Keys based on Foreign Keys
  • Automatically prevent common errors like blank queries and cartesian joins
  • Easily use the DB objects within JSP pages using get/set methods


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