LocaleHandler.java

package com.github.aesteve.vertx.nubes.handlers.impl;

import com.github.aesteve.vertx.nubes.i18n.LocaleResolverRegistry;
import com.github.aesteve.vertx.nubes.reflections.injectors.typed.impl.LocaleParamInjector;
import io.vertx.core.Handler;
import io.vertx.core.http.HttpHeaders;
import io.vertx.ext.web.RoutingContext;

import java.util.Locale;

public class LocaleHandler implements Handler<RoutingContext> {

  private final LocaleResolverRegistry localeResolverRegistry;

  public LocaleHandler(LocaleResolverRegistry localeResolverRegistry) {
    this.localeResolverRegistry = localeResolverRegistry;
  }

  @Override
  public void handle(RoutingContext context) {
    Locale loc = localeResolverRegistry.resolve(context);
    if (loc != null) {
      context.put(LocaleParamInjector.LOCALE_ATTR, loc.toLanguageTag());
      context.response().headers().add(HttpHeaders.CONTENT_LANGUAGE, loc.toLanguageTag());
    }
    context.next();
  }

}