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package javax.ws.rs.core;

import java.security.Principal;

/**
 * An injectable interface that provides access to security related
 * information.
 *
 * @author Paul Sandoz
 * @author Marc Hadley
 * @see Context
 * @since 1.0
 */
public interface SecurityContext {

    /**
     * String identifier for Basic authentication. Value "BASIC"
     */
    public static final String BASIC_AUTH = "BASIC";
    /**
     * String identifier for Client Certificate authentication. Value "CLIENT_CERT"
     */
    public static final String CLIENT_CERT_AUTH = "CLIENT_CERT";
    /**
     * String identifier for Digest authentication. Value "DIGEST"
     */
    public static final String DIGEST_AUTH = "DIGEST";
    /**
     * String identifier for Form authentication. Value "FORM"
     */
    public static final String FORM_AUTH = "FORM";

    /**
     * Returns a java.security.Principal object containing the
     * name of the current authenticated user. If the user
     * has not been authenticated, the method returns null.
     *
     * @return a java.security.Principal containing the name
     *         of the user making this request; null if the user has not been
     *         authenticated
     * @throws java.lang.IllegalStateException
     *          if called outside the scope of a request
     */
    public Principal getUserPrincipal();

    /**
     * Returns a boolean indicating whether the authenticated user is included
     * in the specified logical "role". If the user has not been authenticated,
     * the method returns false.
     *
     * @param role a String specifying the name of the role
     * @return a boolean indicating whether the user making
     *         the request belongs to a given role; false if the user
     *         has not been authenticated
     * @throws java.lang.IllegalStateException
     *          if called outside the scope of a request
     */
    public boolean isUserInRole(String role);

    /**
     * Returns a boolean indicating whether this request was made
     * using a secure channel, such as HTTPS.
     *
     * @return true if the request was made using a secure
     *         channel, false otherwise
     * @throws java.lang.IllegalStateException
     *          if called outside the scope of a request
     */
    public boolean isSecure();

    /**
     * Returns the string value of the authentication scheme used to protect
     * the resource. If the resource is not authenticated, null is returned.
     *
     * Values are the same as the CGI variable AUTH_TYPE
     *
     * @return one of the static members BASIC_AUTH, FORM_AUTH,
     *         CLIENT_CERT_AUTH, DIGEST_AUTH (suitable for == comparison) or the
     *         container-specific string indicating the authentication scheme,
     *         or null if the request was not authenticated.
     * @throws java.lang.IllegalStateException
     *          if called outside the scope of a request
     */
    public String getAuthenticationScheme();
}