authentication/RestAuthenticationFilter.java

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package com.partner.mapsbooking.authentication;

import javax.ws.rs.NotAuthorizedException;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.ext.Provider;

/** Do the authentication by inspecting the authorization headers. */
@Provider
public class RestAuthenticationFilter implements ContainerRequestFilter {

  public void filter(ContainerRequestContext containerRequest) throws WebApplicationException {

    String authCredentials = containerRequest.getHeaderString(HttpHeaders.AUTHORIZATION);

    AuthenticationService authenticationService = new AuthenticationService();

    boolean authStatus = authenticationService.authenticate(authCredentials);

    if (!authStatus) {
      throw new NotAuthorizedException("Wrong username/password!");
    }
  }
}