MyConfiguration.java

public class MyConfiguration extends Configuration
{
   @Valid
   @NotNull
   @JsonProperty("allowedOrigin")
   private String allowedOrigin;

   public String getAllowedOrigin()
   {
     return allowedOrigin;
   }

   public void setAllowedOrigin(String allowedOrigin)
   {
     this.allowedOrigin = allowedOrigin;
   }
}