zdm/event-bus
zdm/event-bus
3
Fork 0
Code Issues 2 Pull Requests Releases 8 Wiki Activity

Allow @Polymorphic and @Priority on types, add value to @Polymorphic

Browse Source 
This is the first step for listener level handler properties.

To allow a handler inside a polymorphic listener to be non-polymorphic,
the @Polymorphic annotation now has a boolean value that defaults to
true. In that case, it can be explicitly set to false to override the
listener-level default.
This commit is contained in:
Kai S. K. Engelbart 2021-02-22 19:12:06 +01:00
parent d9ddc0e1a9
commit 6c74af608c
Signed by: kske
GPG Key ID: 8BEB13EC5DF7EF13
2 changed files with 18 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
event-bus-core/src/main/java/dev/kske/eventbus/core/Polymorphic.java
View File

@ -1,6 +1,6 @@
package dev.kske.eventbus.core;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.*;
@ -8,6 +8,9 @@ import java.lang.annotation.*;
/**
* Allows an event handler to receive events that are subtypes of the declared event type.
* <p>
* When used on a type, the value applies to all event handlers declared within that type that don't
* define a value on their own.
* <p>
* This is useful when defining an event handler for an interface or an abstract class.
*
* @author Kai S. K. Engelbart
@ -16,5 +19,12 @@ import java.lang.annotation.*;
*/
@Documented
@Retention(RUNTIME)
@Target(METHOD)
public @interface Polymorphic {}
@Target({ METHOD, TYPE })
public @interface Polymorphic {
/**
* @return whether the event handler is polymorphic
* @since 1.1.0
*/
boolean value() default true;
}

7
event-bus-core/src/main/java/dev/kske/eventbus/core/Priority.java
View File

@ -1,6 +1,6 @@
package dev.kske.eventbus.core;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.*;
@ -9,6 +9,9 @@ import java.lang.annotation.*;
* Defines the priority of an event handler. Handlers are executed in descending order of their
* priority.
* <p>
* When used on a type, the value applies to all event handlers declared within that type that don't
* define a value on their own.
* <p>
* Handlers without this annotation have the default priority of 100.
* <p>
* The execution order of handlers with the same priority is undefined.
@ -19,7 +22,7 @@ import java.lang.annotation.*;
*/
@Documented
@Retention(RUNTIME)
@Target(METHOD)
@Target({ METHOD, TYPE })
public @interface Priority {
/**