package org.springframework.security.oauth2.provider.token;
   
   import org.springframework.security.core.AuthenticationException;
   import org.springframework.security.oauth2.common.OAuth2AccessToken;
   import org.springframework.security.oauth2.common.exceptions.InvalidTokenException;
   import org.springframework.security.oauth2.provider.OAuth2Authentication;
   
   public interface ResourceServerTokenServices {
   
  	/**
  	 * Load the credentials for the specified access token.
  	 *
  	 * @param accessToken The access token value.
  	 * @return The authentication for the access token.
  	 * @throws AuthenticationException If the access token is expired
  	 * @throws InvalidTokenException if the token isn't valid
  	 */
  	OAuth2Authentication loadAuthentication(String accessToken) throws AuthenticationException, InvalidTokenException;
  
  	/**
  	 * Retrieve the full access token details from just the value.
  	 * 
  	 * @param accessToken the token value
  	 * @return the full access token with client id etc.
  	 */
  	OAuth2AccessToken readAccessToken(String accessToken);
  
  }