Pointcut matching an annotation's parameter value - annotations

Question

Suppose I have an annotation as following:
#Target(ElementType.METHOD)
#Retention(RetentionPolicy.RUNTIME)
public #interface DBOperation
{
boolean isReadOperation() default true;
}
Then in the Aspect, how could I want to write two pointcuts, one for all the method annotated with #DBOperation(isReadOperation=true) and one for #DBOperation(isReadOperation=false)?

Answer 1

The syntax is actually pretty straightforward. Here is an MCVE:
Marker annotation:
package de.scrum_master.app;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
#Retention(RUNTIME)
#Target(METHOD)
public #interface DBOperation {
boolean isReadOperation() default true;
}
Driver application:
package de.scrum_master.app;
public class Application {
public static void main(String[] args) {
Application application = new Application();
application.doSomething();
application.readValue("name");
application.writeValue("name", "John Doe");
}
public void doSomething() {}
#DBOperation
public int readValue(String fieldName) {
return 11;
}
#DBOperation(isReadOperation = false)
public String writeValue(String fieldName, Object value) {
return "dummy";
}
}
Aspect:
package de.scrum_master.aspect;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
#Aspect
public class DBOperationAspect {
#Before("execution(#de.scrum_master.app.DBOperation(isReadOperation=true) * *(..))")
public void interceptRead(JoinPoint joinPoint) throws Throwable {
System.out.println("Read operation: " + joinPoint);
}
#Before("execution(#de.scrum_master.app.DBOperation(isReadOperation=false) * *(..))")
public void interceptWrite(JoinPoint joinPoint) throws Throwable {
System.out.println("Write operation: " + joinPoint);
}
}
Console log:
Read operation: execution(int de.scrum_master.app.Application.readValue(String))
Write operation: execution(String de.scrum_master.app.Application.writeValue(String, Object))