The source code is available in /src folder in your db4o distribution.
In Java version the following projects are available:
bloat
Byte-code optimization library
db4o.instrumentation
Bytecode instrumentation layer on top of bloat
db4o_osgi
db4o OSGI bundle.
db4o_osgi_test
Tests for db4o OSGI bundle.
db4oj
db4o core.
db4oj.tests
collection of db4o regression tests.
db4ojdk1.2
db4o sources for JDK1.2-1.4
db4ojdk5
db4o sources for JDK 5-6
db4otajTransparent Activation instrumentation library
db4otools
Bytecode instrumentation tools
db4onqopt
db4o native query optimization library
db4ounit
unit test framework for db4o.
db4ounit.extensions
Db4oUnit extensions for testing db4o.
We recommend Eclipse to work with the sources.
First you will need to configure Java System Libraries. Having done that use the following steps to import the source project into the development environment:
Further reading:
Building Java Versioncreate it
Building .NET Versioncreate it