Writing User-Defined Extension Classes

You can define your own extension functions to use in transformation services. After you define a class or set of classes containing the extension functions, you build a JAR file containing these classes and add it to Sybase WorkSpace. This JAR file can be located anywhere on the file system.

To write a user-defined extension class:

Create a Java project.
Create a new public Java class in the project.
Create public static methods in the new Java class. Choose from the following Parameter and Return types:
Parameter Types
Java type Expression.xml
boolean
boolean
byte
integer
short
integer
int
integer
long
integer
float
decimal
double
decimal
java.lang.String
string
date
time
dateTime
org.w3c.dom.Node
anyType
org.w3c.dom.NodeList
node-set
Return Types
Java type Expression.xml
boolean
boolean
byte
integer
short
integer
int
integer
long
integer
float
decimal
double
decimal
java.lang.String
string
date
time
dateTime
Examples:
- Java byte, short, int, or long parameter should be declared as type, integer, in an expression.xml file.
- Depending on the context, java.lang.String parameters may be declared as string, date, time, or dateTime in expressions.xml.
Write implementations for the newly-created methods.
Build a JAR file for your project.

Java type	Expression.xml
boolean	boolean
byte	integer
short	integer
int	integer
long	integer
float	decimal
double	decimal
java.lang.String	string date time dateTime
org.w3c.dom.Node	anyType
org.w3c.dom.NodeList	node-set

Java type	Expression.xml
boolean	boolean
byte	integer
short	integer
int	integer
long	integer
float	decimal
double	decimal
java.lang.String	string date time dateTime

Next: Adding User-Defined Extension Function JARs

Developing Custom Classes for Transforming Message Definition Fields