[OmniFaces utilities (2.0)] Get program element annotation of a certain annotation type

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[OmniFaces utilities] The getAnnotation() get program element annotation of a certain annotation type. The difference with Annotated#getAnnotation(Class) is that this method will recursively search inside all Stereotype annotations.

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Method:

Usage:

This is a dummy example, but you should get the idea from it. First, we have defined a dummy CDI stereotype:

// DummyStereotype

package some.beans;

import static java.lang.annotation.ElementType.FIELD;

import java.lang.annotation.Retention;

import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Target;

import javax.enterprise.inject.Stereotype;

@Stereotype

@Target(FIELD)

@Retention(RUNTIME)

public @interface DummyStereotype {

}

A dummy BeanA:

// BeanA

package some.beans;

import javax.enterprise.context.RequestScoped;

import javax.inject.Named;

@Named

@RequestScoped

public class BeanA {   

}

An injection point of BeanA in BeanB with dummy stereotype:

// BeanB

package some.beans;

import javax.enterprise.context.RequestScoped;

import javax.inject.Inject;

import javax.inject.Named;

@Named

@RequestScoped

public class BeanB {

   

    @Inject @DummyStereotype

    BeanA a;

   

}

A dummy BeanC with a simple method dedicated to test the default Annotated#getAnnotation() and the OmniFaces, Beans#getAnnotation():

// BeanC

package some.beans;

import java.lang.annotation.Retention;

import java.lang.annotation.Target;

import java.util.Set;

import javax.enterprise.context.RequestScoped;

import javax.enterprise.inject.spi.Annotated;

import javax.enterprise.inject.spi.Bean;

import javax.enterprise.inject.spi.InjectionPoint;

import javax.inject.Named;

import org.omnifaces.util.Beans;

@Named

@RequestScoped

public class BeanC {

 public void inspectAnnotations() {

  Bean<BeanB> beanBresolved = Beans.resolve(BeanB.class);

  Set<InjectionPoint> injectionPoints = beanBresolved.getInjectionPoints();

  if (injectionPoints.size() > 0) {

      beanBresolved.getInjectionPoints().stream().forEach((candidate) -> {

      Annotated annotated = candidate.getAnnotated();

               

      System.out.println("All annotations: " + annotated.getAnnotations());

      // default Annotated#getAnnotation()

      //Retention retention = annotated.getAnnotation(Retention.class);

      //Target target = annotated.getAnnotation(Target.class);

               

      //OmniFaces Beans#getAnnotation()

      Retention retention = Beans.getAnnotation(annotated, Retention.class);

      Target target = Beans.getAnnotation(annotated, Target.class);

      if (retention != null) {

          System.out.println("retention=" + retention.value().name());

      } else {

          System.out.println("NULL");

      }

      if (target != null) {

          System.out.println("target=" + target.value()[0]);

      } else {

          System.out.println("NULL");

      }

    });

  } else {

    System.out.println("No injection point found !!!");

  }

 }

}

Output for default Annotated#getAnnotation():

All annotations: [@javax.inject.Inject(), @some.beans.DummyStereotype()]

NULL

NULL

Output for default Beans#getAnnotation():

All annotations: [@javax.inject.Inject(), @some.beans.DummyStereotype()]

retention=RUNTIME

target=FIELD

API GH