Re-factor AuthorizationGrantTokenExchanger

Fixes gh-4728

config/src/main/java/org/springframework/security/config/annotation/web/builders/HttpSecurity.java

@@ -62,7 +62,7 @@ import org.springframework.security.core.context.SecurityContext;
 import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.config.annotation.web.configurers.oauth2.client.OAuth2LoginConfigurer;
-import org.springframework.security.oauth2.client.authentication.AuthorizationGrantTokenExchanger;
+import org.springframework.security.oauth2.client.endpoint.AuthorizationGrantTokenExchanger;
 import org.springframework.security.oauth2.client.endpoint.AuthorizationRequestUriBuilder;
 import org.springframework.security.web.DefaultSecurityFilterChain;
 import org.springframework.security.web.PortMapper;

config/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/client/OAuth2LoginConfigurer.java

@@ -24,9 +24,9 @@ import org.springframework.security.core.authority.mapping.GrantedAuthoritiesMap
 import org.springframework.security.oauth2.client.InMemoryOAuth2AuthorizedClientService;
 import org.springframework.security.oauth2.client.OAuth2AuthorizedClient;
 import org.springframework.security.oauth2.client.OAuth2AuthorizedClientService;
-import org.springframework.security.oauth2.client.authentication.AuthorizationGrantTokenExchanger;
+import org.springframework.security.oauth2.client.endpoint.AuthorizationGrantTokenExchanger;
-import org.springframework.security.oauth2.client.authentication.NimbusAuthorizationCodeTokenExchanger;
+import org.springframework.security.oauth2.client.endpoint.NimbusAuthorizationCodeTokenExchanger;
-import org.springframework.security.oauth2.client.authentication.OAuth2AuthorizationCodeAuthenticationToken;
+import org.springframework.security.oauth2.client.endpoint.OAuth2AuthorizationCodeGrantRequest;
 import org.springframework.security.oauth2.client.authentication.OAuth2LoginAuthenticationProvider;
 import org.springframework.security.oauth2.client.endpoint.AuthorizationRequestUriBuilder;
 import org.springframework.security.oauth2.client.jwt.JwtDecoderRegistry;
@@ -144,7 +144,7 @@ public final class OAuth2LoginConfigurer<B extends HttpSecurityBuilder<B>> exten
 	}
 
 	public class TokenEndpointConfig {
-		private AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeAuthenticationToken> authorizationCodeTokenExchanger;
+		private AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeGrantRequest> authorizationCodeTokenExchanger;
 		private OAuth2TokenRepository<OAuth2AccessToken> accessTokenRepository;
 		private JwtDecoderRegistry jwtDecoderRegistry;
 
@@ -152,7 +152,7 @@ public final class OAuth2LoginConfigurer<B extends HttpSecurityBuilder<B>> exten
 		}
 
 		public TokenEndpointConfig authorizationCodeTokenExchanger(
-			AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeAuthenticationToken> authorizationCodeTokenExchanger) {
+			AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeGrantRequest> authorizationCodeTokenExchanger) {
 
 			Assert.notNull(authorizationCodeTokenExchanger, "authorizationCodeTokenExchanger cannot be null");
 			this.authorizationCodeTokenExchanger = authorizationCodeTokenExchanger;
@@ -237,7 +237,7 @@ public final class OAuth2LoginConfigurer<B extends HttpSecurityBuilder<B>> exten
 	public void init(B http) throws Exception {
 		super.init(http);
 
-		AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeAuthenticationToken> authorizationCodeTokenExchanger =
+		AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeGrantRequest> authorizationCodeTokenExchanger =
 			this.tokenEndpointConfig.authorizationCodeTokenExchanger;
 		if (authorizationCodeTokenExchanger == null) {
 			authorizationCodeTokenExchanger = new NimbusAuthorizationCodeTokenExchanger();

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/authentication/OAuth2LoginAuthenticationProvider.java

@@ -21,6 +21,8 @@ import org.springframework.security.core.AuthenticationException;
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.authority.mapping.GrantedAuthoritiesMapper;
 import org.springframework.security.oauth2.client.OAuth2AuthorizedClient;
+import org.springframework.security.oauth2.client.endpoint.AuthorizationGrantTokenExchanger;
+import org.springframework.security.oauth2.client.endpoint.OAuth2AuthorizationCodeGrantRequest;
 import org.springframework.security.oauth2.client.userinfo.OAuth2UserRequest;
 import org.springframework.security.oauth2.client.userinfo.OAuth2UserService;
 import org.springframework.security.oauth2.core.OAuth2AccessToken;
@@ -60,12 +62,12 @@ import java.util.Collection;
 public class OAuth2LoginAuthenticationProvider implements AuthenticationProvider {
 	private static final String INVALID_STATE_PARAMETER_ERROR_CODE = "invalid_state_parameter";
 	private static final String INVALID_REDIRECT_URI_PARAMETER_ERROR_CODE = "invalid_redirect_uri_parameter";
-	private final AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeAuthenticationToken> authorizationCodeTokenExchanger;
+	private final AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeGrantRequest> authorizationCodeTokenExchanger;
 	private final OAuth2UserService<OAuth2UserRequest, OAuth2User> userService;
 	private GrantedAuthoritiesMapper authoritiesMapper = (authorities -> authorities);
 
 	public OAuth2LoginAuthenticationProvider(
-		AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeAuthenticationToken> authorizationCodeTokenExchanger,
+		AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeGrantRequest> authorizationCodeTokenExchanger,
 		OAuth2UserService<OAuth2UserRequest, OAuth2User> userService) {
 
 		Assert.notNull(authorizationCodeTokenExchanger, "authorizationCodeTokenExchanger cannot be null");
@@ -110,7 +112,10 @@ public class OAuth2LoginAuthenticationProvider implements AuthenticationProvider
 		}
 
 		OAuth2AccessTokenResponse accessTokenResponse =
-			this.authorizationCodeTokenExchanger.exchange(authorizationCodeAuthentication);
+			this.authorizationCodeTokenExchanger.exchange(
+				new OAuth2AuthorizationCodeGrantRequest(
+					authorizationCodeAuthentication.getClientRegistration(),
+					authorizationCodeAuthentication.getAuthorizationExchange()));
 
 		OAuth2AccessToken accessToken = new OAuth2AccessToken(accessTokenResponse.getTokenType(),
 			accessTokenResponse.getTokenValue(), accessTokenResponse.getIssuedAt(),

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/AbstractOAuth2AuthorizationGrantRequest.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2002-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.client.endpoint;
+
+import org.springframework.security.oauth2.core.AuthorizationGrantType;
+import org.springframework.util.Assert;
+
+/**
+ * Base implementation of an <i>OAuth 2.0 Authorization Grant</i> request
+ * that holds an <i>authorization grant</i> credential and is used when
+ * initiating a HTTP request to the Authorization Server's <i>Token Endpoint</i>.
+ *
+ * @author Joe Grandja
+ * @since 5.0
+ * @see AuthorizationGrantType
+ * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-1.3">Section 1.3 Authorization Grant</a>
+ */
+public abstract class AbstractOAuth2AuthorizationGrantRequest {
+	private final AuthorizationGrantType authorizationGrantType;
+
+	protected AbstractOAuth2AuthorizationGrantRequest(AuthorizationGrantType authorizationGrantType) {
+		Assert.notNull(authorizationGrantType, "authorizationGrantType cannot be null");
+		this.authorizationGrantType = authorizationGrantType;
+	}
+
+	public AuthorizationGrantType getGrantType() {
+		return this.authorizationGrantType;
+	}
+}

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/AuthorizationGrantTokenExchanger.java

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.security.oauth2.client.authentication;
+package org.springframework.security.oauth2.client.endpoint;
 
 
 import org.springframework.security.oauth2.core.AuthorizationGrantType;
@@ -21,21 +21,21 @@ import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
 
 /**
- * Implementations of this interface are responsible for <i>&quot;exchanging&quot;</i>
+ * A strategy for <i>&quot;exchanging&quot;</i> an <i>Authorization Grant</i> credential
- * an <i>authorization grant</i> credential (for example, an authorization code) for an
+ * (e.g. an Authorization Code) for an <i>Access Token</i> credential
- * <i>access token</i> credential at the authorization server's <i>Token Endpoint</i>.
+ * at the Authorization Server's <i>Token Endpoint</i>.
  *
  * @author Joe Grandja
  * @since 5.0
- * @see AuthorizationGrantType
+ * @see AbstractOAuth2AuthorizationGrantRequest
- * @see AbstractOAuth2AuthorizationGrantAuthenticationToken
  * @see OAuth2AccessTokenResponse
+ * @see AuthorizationGrantType
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-1.3">Section 1.3 Authorization Grant</a>
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-4.1.3">Section 4.1.3 Access Token Request (Authorization Code Grant)</a>
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-4.1.4">Section 4.1.4 Access Token Response (Authorization Code Grant)</a>
  */
-public interface AuthorizationGrantTokenExchanger<T extends AbstractOAuth2AuthorizationGrantAuthenticationToken>  {
+public interface AuthorizationGrantTokenExchanger<T extends AbstractOAuth2AuthorizationGrantRequest>  {
 
-	OAuth2AccessTokenResponse exchange(T authorizationGrantAuthentication) throws OAuth2AuthenticationException;
+	OAuth2AccessTokenResponse exchange(T authorizationGrantRequest) throws OAuth2AuthenticationException;
 
 }

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/NimbusAuthorizationCodeTokenExchanger.java

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.security.oauth2.client.authentication;
+package org.springframework.security.oauth2.client.endpoint;
 
 
 import com.nimbusds.oauth2.sdk.AccessTokenResponse;
@@ -33,8 +33,8 @@ import com.nimbusds.oauth2.sdk.id.ClientID;
 import org.springframework.http.MediaType;
 import org.springframework.security.authentication.AuthenticationServiceException;
 import org.springframework.security.oauth2.client.registration.ClientRegistration;
-import org.springframework.security.oauth2.core.OAuth2AccessToken;
 import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
+import org.springframework.security.oauth2.core.OAuth2AccessToken;
 import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
 import org.springframework.security.oauth2.core.OAuth2Error;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
@@ -49,8 +49,8 @@ import java.util.Set;
 
 /**
  * An implementation of an {@link AuthorizationGrantTokenExchanger} that <i>&quot;exchanges&quot;</i>
- * an <i>authorization code</i> credential for an <i>access token</i> credential
+ * an <i>Authorization Code</i> credential for an <i>Access Token</i> credential
- * at the authorization server's <i>Token Endpoint</i>.
+ * at the Authorization Server's <i>Token Endpoint</i>.
  *
  * <p>
  * <b>NOTE:</b> This implementation uses the <b>Nimbus OAuth 2.0 SDK</b> internally.
@@ -58,24 +58,24 @@ import java.util.Set;
  * @author Joe Grandja
  * @since 5.0
  * @see AuthorizationGrantTokenExchanger
- * @see OAuth2AuthorizationCodeAuthenticationToken
+ * @see OAuth2AuthorizationCodeGrantRequest
  * @see OAuth2AccessTokenResponse
  * @see <a target="_blank" href="https://connect2id.com/products/nimbus-oauth-openid-connect-sdk">Nimbus OAuth 2.0 SDK</a>
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-4.1.3">Section 4.1.3 Access Token Request (Authorization Code Grant)</a>
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-4.1.4">Section 4.1.4 Access Token Response (Authorization Code Grant)</a>
  */
-public class NimbusAuthorizationCodeTokenExchanger implements AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeAuthenticationToken> {
+public class NimbusAuthorizationCodeTokenExchanger implements AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeGrantRequest> {
 	private static final String INVALID_TOKEN_RESPONSE_ERROR_CODE = "invalid_token_response";
 
 	@Override
-	public OAuth2AccessTokenResponse exchange(OAuth2AuthorizationCodeAuthenticationToken authorizationCodeAuthentication)
+	public OAuth2AccessTokenResponse exchange(OAuth2AuthorizationCodeGrantRequest authorizationGrantRequest)
 			throws OAuth2AuthenticationException {
 
-		ClientRegistration clientRegistration = authorizationCodeAuthentication.getClientRegistration();
+		ClientRegistration clientRegistration = authorizationGrantRequest.getClientRegistration();
 
 		// Build the authorization code grant request for the token endpoint
 		AuthorizationCode authorizationCode = new AuthorizationCode(
-			authorizationCodeAuthentication.getAuthorizationExchange().getAuthorizationResponse().getCode());
+			authorizationGrantRequest.getAuthorizationExchange().getAuthorizationResponse().getCode());
 		URI redirectUri = toURI(clientRegistration.getRedirectUri());
 		AuthorizationGrant authorizationCodeGrant = new AuthorizationCodeGrant(authorizationCode, redirectUri);
 		URI tokenUri = toURI(clientRegistration.getProviderDetails().getTokenUri());
@@ -130,7 +130,7 @@ public class NimbusAuthorizationCodeTokenExchanger implements AuthorizationGrant
 		Set<String> scopes;
 		if (CollectionUtils.isEmpty(accessTokenResponse.getTokens().getAccessToken().getScope())) {
 			scopes = new LinkedHashSet<>(
-				authorizationCodeAuthentication.getAuthorizationExchange().getAuthorizationRequest().getScopes());
+				authorizationGrantRequest.getAuthorizationExchange().getAuthorizationRequest().getScopes());
 		} else {
 			scopes = new LinkedHashSet<>(
 				accessTokenResponse.getTokens().getAccessToken().getScope().toStringList());

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/endpoint/OAuth2AuthorizationCodeGrantRequest.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2002-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.client.endpoint;
+
+import org.springframework.security.oauth2.client.registration.ClientRegistration;
+import org.springframework.security.oauth2.core.AuthorizationGrantType;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationExchange;
+import org.springframework.util.Assert;
+
+/**
+ * An <i>OAuth 2.0 Authorization Code Grant</i> request that holds an <i>Authorization Code</i> credential,
+ * which was granted by the <i>Resource Owner</i> to the specified {@link #getClientRegistration() Client}.
+ *
+ * @author Joe Grandja
+ * @since 5.0
+ * @see AbstractOAuth2AuthorizationGrantRequest
+ * @see ClientRegistration
+ * @see OAuth2AuthorizationExchange
+ * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-1.3.1">Section 1.3.1 Authorization Code Grant</a>
+ */
+public class OAuth2AuthorizationCodeGrantRequest extends AbstractOAuth2AuthorizationGrantRequest {
+	private final ClientRegistration clientRegistration;
+	private final OAuth2AuthorizationExchange authorizationExchange;
+
+	public OAuth2AuthorizationCodeGrantRequest(ClientRegistration clientRegistration,
+												OAuth2AuthorizationExchange authorizationExchange) {
+		super(AuthorizationGrantType.AUTHORIZATION_CODE);
+		Assert.notNull(clientRegistration, "clientRegistration cannot be null");
+		Assert.notNull(authorizationExchange, "authorizationExchange cannot be null");
+		this.clientRegistration = clientRegistration;
+		this.authorizationExchange = authorizationExchange;
+	}
+
+	public ClientRegistration getClientRegistration() {
+		return this.clientRegistration;
+	}
+
+	public OAuth2AuthorizationExchange getAuthorizationExchange() {
+		return this.authorizationExchange;
+	}
+}

oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/oidc/authentication/OidcAuthorizationCodeAuthenticationProvider.java

@@ -20,9 +20,10 @@ import org.springframework.security.core.Authentication;
 import org.springframework.security.core.AuthenticationException;
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.authority.mapping.GrantedAuthoritiesMapper;
-import org.springframework.security.oauth2.client.authentication.AuthorizationGrantTokenExchanger;
+import org.springframework.security.oauth2.client.endpoint.AuthorizationGrantTokenExchanger;
 import org.springframework.security.oauth2.client.authentication.OAuth2AuthenticationToken;
 import org.springframework.security.oauth2.client.authentication.OAuth2AuthorizationCodeAuthenticationToken;
+import org.springframework.security.oauth2.client.endpoint.OAuth2AuthorizationCodeGrantRequest;
 import org.springframework.security.oauth2.client.jwt.JwtDecoderRegistry;
 import org.springframework.security.oauth2.client.oidc.OidcAuthorizedClient;
 import org.springframework.security.oauth2.client.oidc.userinfo.OidcUserRequest;
@@ -76,13 +77,13 @@ public class OidcAuthorizationCodeAuthenticationProvider implements Authenticati
 	private static final String INVALID_STATE_PARAMETER_ERROR_CODE = "invalid_state_parameter";
 	private static final String INVALID_REDIRECT_URI_PARAMETER_ERROR_CODE = "invalid_redirect_uri_parameter";
 	private static final String INVALID_ID_TOKEN_ERROR_CODE = "invalid_id_token";
-	private final AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeAuthenticationToken> authorizationCodeTokenExchanger;
+	private final AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeGrantRequest> authorizationCodeTokenExchanger;
 	private final OAuth2UserService<OidcUserRequest, OidcUser> userService;
 	private final JwtDecoderRegistry jwtDecoderRegistry;
 	private GrantedAuthoritiesMapper authoritiesMapper = (authorities -> authorities);
 
 	public OidcAuthorizationCodeAuthenticationProvider(
-		AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeAuthenticationToken> authorizationCodeTokenExchanger,
+		AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeGrantRequest> authorizationCodeTokenExchanger,
 		OAuth2UserService<OidcUserRequest, OidcUser> userService,
 		JwtDecoderRegistry jwtDecoderRegistry) {
 
@@ -130,7 +131,10 @@ public class OidcAuthorizationCodeAuthenticationProvider implements Authenticati
 		}
 
 		OAuth2AccessTokenResponse accessTokenResponse =
-			this.authorizationCodeTokenExchanger.exchange(authorizationCodeAuthentication);
+			this.authorizationCodeTokenExchanger.exchange(
+				new OAuth2AuthorizationCodeGrantRequest(
+					authorizationCodeAuthentication.getClientRegistration(),
+					authorizationCodeAuthentication.getAuthorizationExchange()));
 
 		OAuth2AccessToken accessToken = new OAuth2AccessToken(accessTokenResponse.getTokenType(),
 			accessTokenResponse.getTokenValue(), accessTokenResponse.getIssuedAt(),

samples/boot/oauth2login/src/integration-test/java/org/springframework/security/samples/OAuth2LoginApplicationTests.java

@@ -36,17 +36,17 @@ import org.springframework.security.config.annotation.web.builders.HttpSecurity;
 import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
 import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 import org.springframework.security.core.GrantedAuthority;
-import org.springframework.security.oauth2.client.authentication.OAuth2AuthorizationCodeAuthenticationToken;
+import org.springframework.security.oauth2.client.endpoint.AuthorizationGrantTokenExchanger;
-import org.springframework.security.oauth2.client.authentication.AuthorizationGrantTokenExchanger;
+import org.springframework.security.oauth2.client.endpoint.OAuth2AuthorizationCodeGrantRequest;
-import org.springframework.security.oauth2.client.userinfo.OAuth2UserService;
 import org.springframework.security.oauth2.client.registration.ClientRegistration;
 import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
+import org.springframework.security.oauth2.client.userinfo.OAuth2UserService;
 import org.springframework.security.oauth2.client.web.OAuth2AuthorizationRequestRedirectFilter;
 import org.springframework.security.oauth2.client.web.OAuth2LoginAuthenticationFilter;
 import org.springframework.security.oauth2.core.OAuth2AccessToken;
-import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
-import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
 import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponseType;
+import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
 import org.springframework.security.oauth2.core.user.DefaultOAuth2User;
 import org.springframework.security.oauth2.core.user.OAuth2UserAuthority;
 import org.springframework.test.context.junit4.SpringRunner;
@@ -354,7 +354,7 @@ public class OAuth2LoginApplicationTests {
 		}
 		// @formatter:on
 
-		private AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeAuthenticationToken> mockAuthorizationCodeTokenExchanger() {
+		private AuthorizationGrantTokenExchanger<OAuth2AuthorizationCodeGrantRequest> mockAuthorizationCodeTokenExchanger() {
 			OAuth2AccessTokenResponse accessTokenResponse = OAuth2AccessTokenResponse.withToken("access-token-1234")
 				.tokenType(OAuth2AccessToken.TokenType.BEARER)
 				.expiresIn(60 * 1000)