Spring Enable Annotation with Selectors

EnableSomeBeansSelector.java

package enableannot.selector;

import org.springframework.context.annotation.Import;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Import(SomeBeanConfigurationSelector.class)
public @interface EnableSomeBeansSelector {
    String criteria() default "default";
}

SomeBeanConfigurationSelector.java

package enableannot.selector;

import org.springframework.context.annotation.ImportSelector;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.core.type.AnnotationMetadata;

public class SomeBeanConfigurationSelector implements ImportSelector {
    @Override
    public String[] selectImports(AnnotationMetadata importingClassMetadata) {
        AnnotationAttributes attributes =
                AnnotationAttributes.fromMap(
                        importingClassMetadata.getAnnotationAttributes(EnableSomeBeansSelector.class.getName(), false));
        String criteria = attributes.getString("criteria");
        if (criteria.equals("default")) {
            return new String[]{"enableannot.selector.SomeBeanConfigurationDefault"};
        }else {
            return new String[]{"enableannot.selector.SomeBeanConfigurationType1"};
        }
    }
}

TestEnableWithSelectorAnnotationsType1.java

package enableannot.selector;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.ImportSelector;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.equalTo;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
public class TestEnableWithSelectorAnnotationsType1 {

    @Autowired
    private String aBean;

    @Test
    public void testInjectedBean() {
        assertThat(aBean, equalTo("Type1"));
    }

    @EnableSomeBeansSelector(criteria = "type1")
    @Configuration
    public static class SpringConfig {}
}

@Configuration
class SomeBeanConfigurationType1 {

    @Bean
    public String aBean() {
        return "Type1";
    }

}

@Configuration
class SomeBeanConfigurationDefault {

    @Bean
    public String aBean() {
        return "Default";
    }

}