RegisterTemplateFactoryConditionally.java

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Import(FeatureConfiguration.class)
public @interface EnableFeature {}

@Configuration
public class FeatureConfiguration {

    @Bean
    @Conditional(NoTemplateFactoryExistsCondition.class)
    TemplateFactory templateFactory() {
        return new TemplateFactory();
    }
}

public class NoTemplateFactoryExistsCondition implements Condition {
    @Override
    public boolean matches(final ConditionContext context, final AnnotatedTypeMetadata metadata) {
        try {
            context.getBeanFactory().getBean(TemplateFactory.class);
            return false;
        } catch (NoSuchBeanDefinitionException e) {
            return true;
        }
    }
}