Convert anonymous inner class to Java 8 lambda

Question

Sonar static code analysis tells me this is a code smell and should be converted to a lamdba.

 public WebMvcConfigurer corsConfigurer() {
        return new WebMvcConfigurer() {
            @Override
            public void addCorsMappings(CorsRegistry registry) {
                registry.addMapping("/**")
               .allowedOrigins("*")
               .allowedMethods("*");
            }
        };
    }

I've tried various approaches with no luck. Any help is appreciated.

Answer 1

Assuming WebMvcConfigurer is a functional interface, the method can be changed to the following:

public WebMvcConfigurer corsConfigurer() {
     return registry -> registry.addMapping("/**")
                                .allowedOrigins("*")
                                .allowedMethods("*");
}