Function
Last updated
Last updated
Function task executes JavaScript or Groovy script.
Attribute | Description |
---|---|
Script Type | JavaScript or Groovy |
Function | Script contents |
Attribute | Description |
---|---|
ResultValue | The return value from the script, if exists. |
UseDataStructure | Map data structure to the return value. This is used at mapping component. |
DataStructureId | Data structure id for future mapping. |
JDK provides JavaScript engine named Nashorn and this engine is removed since JDK 15. After JDK 15, gravalVM is used as an alternative of Nashorn engine.
And there is a slight change on JavaScript function execution after JDK 8.
Sccript | Result |
---|---|
8 | Named function can be executed. The last function is executed if unnamed function does not exist. Unnamed function has the highest priority. |
9+ | Named function cannot be executed. Unnamed function is executed. |
Sccript | Result |
---|---|
function hello () { return "Hello"; } | Hello |
function () { return "Hello"; } | Hello |
function add(a,b) { return a + b; } function a () { return add(1,2); } | 3.0 |
function a(a, b) { return a + b; }
function () { return a(1,2); }
function b() { return "Hello"; } | 3.0 |
Sccript | Result |
---|---|
function hello () { return "Hello"; } | Error |
function () { return "Hello"; } | Hello |
function add(a,b) { return a + b; } function () { return add(1,2); } | 3 |
This is the definition of Groovy (from Wikipedia)
Apache Groovy is a Java-syntax-compatible object-oriented programming language for the Java platform. It is both a static and dynamic language with features similar to those of Python, Ruby, and Smalltalk. It can be used as both a programming language and a scripting language for the Java Platform, is compiled to Java virtual machine (JVM) bytecode, and interoperates seamlessly with other Java code and libraries. |
The example script of Groovy is like this.