Java command annotations are used for the developing Java commands in PAK.
This chapter describes the functionality of the @PostConstruct annotation.
It also gives an example of how you can use this annotation in your implementation.
1. Basics
The @PostConstruct annotation marks a method as post-construct operation of a class.
This annotation is only relevant for command creation.
The post-construct method is executed after all injections and other preparations have been executed.
However, it is executed before the @Run method.
The name of the @PostConstruct method must not collide with the getter/setter name of a class variable.For further information please refer to the @Persistent documentation.
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2. Usage
Listing 1 shows an example usage of the @PostConstruct annotation.
It manipulates the input variable name by adding the postfix „_test“ in case the input variable test = true.
Listing 1. Example usage of
@PostConstruct/**
* @workflowDocu This command gets an element by its id.
*/
@JavaCommand
@CommandGroup("Element")
public class GetElement {
/**
* @workflowDocu The element name
*/
@Persistent
private String name;
/**
* @workflowDocu Is the command a test
*/
@Persistent
private boolean test;
/**
* Convert the element name.
*/
@PostConstruct (1)
public void convertInput() {
if (test) {
this.name += "_test";
}
}
[...]
}| 1 | Use of the @PostConstruct annotation |