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Extending HCL OneDB™Beyond standard relational database objects, HCL OneDB™ can be extended to handle specialized data types, access methods, routines, and other objects. HCL OneDB™ includes many built-in extensions that are fully integrated in the database server. HCL OneDB™ also provides DataBlade® modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for HCL OneDB™.
Creating extensionsYou can create user-defined data types, routines, access methods, and other database objects to suit your needs. You can use application programming interfaces to write user-defined routines and applications that access data in HCL OneDB™ databases.
DataBlade® Developers KitThe DataBlade® Developers Kit (DBDK) guides contain information about the tools you can use to develop and package DataBlade® modules, which extend the functionality of HCL OneDB™ databases.
DataBlade® Developers Kit User's GuideThe HCL OneDB™ DataBlade® Developers Kit Users Guide describes how to use OneDB® DataBlade® Developers Kit (DBDK) tools to develop and package DataBlade® modules.
Programming DataBlade® modules in Java™This section contains information to help you edit and compile Java™ language source code generated by BladeSmith.
Source files generated by BladeSmithWhen you create objects, BladeSmith generates the source files; some file names are prefixed with the name of the DataBlade® module (indicated by project). By default, BladeSmith creates the source files in the src and src\java subdirectories of the directory that contains the BladeSmith project file.

Source files generated by BladeSmith

When you create objects, BladeSmith generates the source files; some file names are prefixed with the name of the DataBlade® module (indicated by project). By default, BladeSmith creates the source files in the src and src\java subdirectories of the directory that contains the BladeSmith project file.

Generated source files are listed in the following table.

Table 1. Source files generated by BladeSmith
File name	Directory	Type of file	More information
`Project`UDRs.java	src\java	Java™ source code file	See Java source code files.
IfmxInStream.java	src\java	Java source code file	See BladeSmith utility classes.
IfmxOutStream.java	src\java	Java source code file	See BladeSmith utility classes.
IfmxLog.java	src\java	Java source code file	See BladeSmith utility classes.
IfmxTrace.java	src\java	Java source code file	See BladeSmith utility classes.
DBDKInputException.java	src\java	Java source code file	See BladeSmith utility classes.
DBDKOutputException.java	src\java	Java source code file	See BladeSmith utility classes.
`Opaque`.java	src\java	Java source code file	See The SQLData interface method support code.
readme.txt	src\java	Text file	This file describes the files in the src\java directory.
warning.txt	src\java	Text file	This file describes potential problems with your source code. See Warning file for more information.
`Project`_Java.mak	src\java	Makefile	Use this file for compiling on both UNIX™ and Windows™. See Compiling DataBlade module Java code for more information.

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