Make Filter implementations final

Closes gh-359

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/oidc/web/OidcClientRegistrationEndpointFilter.java

@@ -51,7 +51,7 @@ import org.springframework.web.filter.OncePerRequestFilter;
  * @see OidcClientRegistration
  * @see <a href="https://openid.net/specs/openid-connect-registration-1_0.html#ClientRegistration">3. Client Registration Endpoint</a>
  */
-public class OidcClientRegistrationEndpointFilter extends OncePerRequestFilter {
+public final class OidcClientRegistrationEndpointFilter extends OncePerRequestFilter {
 	/**
 	 * The default endpoint {@code URI} for OpenID Client Registration requests.
 	 */

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/oidc/web/OidcProviderConfigurationEndpointFilter.java

@@ -47,7 +47,7 @@ import java.io.IOException;
  * @see ProviderSettings
  * @see <a target="_blank" href="https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfigurationRequest">4.1. OpenID Provider Configuration Request</a>
  */
-public class OidcProviderConfigurationEndpointFilter extends OncePerRequestFilter {
+public final class OidcProviderConfigurationEndpointFilter extends OncePerRequestFilter {
 	/**
 	 * The default endpoint {@code URI} for OpenID Provider Configuration requests.
 	 */

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/NimbusJwkSetEndpointFilter.java

@@ -45,7 +45,7 @@ import org.springframework.web.filter.OncePerRequestFilter;
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7517">JSON Web Key (JWK)</a>
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7517#section-5">Section 5 JWK Set Format</a>
  */
-public class NimbusJwkSetEndpointFilter extends OncePerRequestFilter {
+public final class NimbusJwkSetEndpointFilter extends OncePerRequestFilter {
 	/**
 	 * The default endpoint {@code URI} for JWK Set requests.
 	 */

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/OAuth2AuthorizationEndpointFilter.java

@@ -75,7 +75,7 @@ import org.springframework.web.util.UriComponentsBuilder;
  * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc6749#section-4.1.1">Section 4.1.1 Authorization Request</a>
  * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc6749#section-4.1.2">Section 4.1.2 Authorization Response</a>
  */
-public class OAuth2AuthorizationEndpointFilter extends OncePerRequestFilter {
+public final class OAuth2AuthorizationEndpointFilter extends OncePerRequestFilter {
 	/**
 	 * The default endpoint {@code URI} for authorization requests.
 	 */
@@ -205,7 +205,7 @@ public class OAuth2AuthorizationEndpointFilter extends OncePerRequestFilter {
 	 *
 	 * @param authenticationConverter the {@link AuthenticationConverter} used when attempting to extract an Authorization Request (or Consent) from {@link HttpServletRequest}
 	 */
-	public final void setAuthenticationConverter(AuthenticationConverter authenticationConverter) {
+	public void setAuthenticationConverter(AuthenticationConverter authenticationConverter) {
 		Assert.notNull(authenticationConverter, "authenticationConverter cannot be null");
 		this.authenticationConverter = authenticationConverter;
 	}
@@ -216,7 +216,7 @@ public class OAuth2AuthorizationEndpointFilter extends OncePerRequestFilter {
 	 *
 	 * @param authenticationSuccessHandler the {@link AuthenticationSuccessHandler} used for handling an {@link OAuth2AuthorizationCodeRequestAuthenticationToken}
 	 */
-	public final void setAuthenticationSuccessHandler(AuthenticationSuccessHandler authenticationSuccessHandler) {
+	public void setAuthenticationSuccessHandler(AuthenticationSuccessHandler authenticationSuccessHandler) {
 		Assert.notNull(authenticationSuccessHandler, "authenticationSuccessHandler cannot be null");
 		this.authenticationSuccessHandler = authenticationSuccessHandler;
 	}
@@ -227,7 +227,7 @@ public class OAuth2AuthorizationEndpointFilter extends OncePerRequestFilter {
 	 *
 	 * @param authenticationFailureHandler the {@link AuthenticationFailureHandler} used for handling an {@link OAuth2AuthorizationCodeRequestAuthenticationException}
 	 */
-	public final void setAuthenticationFailureHandler(AuthenticationFailureHandler authenticationFailureHandler) {
+	public void setAuthenticationFailureHandler(AuthenticationFailureHandler authenticationFailureHandler) {
 		Assert.notNull(authenticationFailureHandler, "authenticationFailureHandler cannot be null");
 		this.authenticationFailureHandler = authenticationFailureHandler;
 	}
@@ -238,7 +238,7 @@ public class OAuth2AuthorizationEndpointFilter extends OncePerRequestFilter {
 	 *
 	 * @param consentPage the URI of the custom consent page to redirect to if consent is required (e.g. "/oauth2/consent")
 	 */
-	public final void setConsentPage(String consentPage) {
+	public void setConsentPage(String consentPage) {
 		this.consentPage = consentPage;
 	}
 

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/OAuth2AuthorizationServerMetadataEndpointFilter.java

@@ -48,7 +48,7 @@ import org.springframework.web.util.UriComponentsBuilder;
  * @see ProviderSettings
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc8414#section-3">3. Obtaining Authorization Server Metadata</a>
  */
-public class OAuth2AuthorizationServerMetadataEndpointFilter extends OncePerRequestFilter {
+public final class OAuth2AuthorizationServerMetadataEndpointFilter extends OncePerRequestFilter {
 	/**
 	 * The default endpoint {@code URI} for OAuth 2.0 Authorization Server Metadata requests.
 	 */

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/OAuth2ClientAuthenticationFilter.java

@@ -62,7 +62,7 @@ import org.springframework.web.filter.OncePerRequestFilter;
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-2.3">Section 2.3 Client Authentication</a>
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-3.2.1">Section 3.2.1 Token Endpoint Client Authentication</a>
  */
-public class OAuth2ClientAuthenticationFilter extends OncePerRequestFilter {
+public final class OAuth2ClientAuthenticationFilter extends OncePerRequestFilter {
 	private final AuthenticationManager authenticationManager;
 	private final RequestMatcher requestMatcher;
 	private final HttpMessageConverter<OAuth2Error> errorHttpResponseConverter = new OAuth2ErrorHttpMessageConverter();
@@ -121,7 +121,7 @@ public class OAuth2ClientAuthenticationFilter extends OncePerRequestFilter {
 	 *
 	 * @param authenticationConverter used for converting a {@link HttpServletRequest} to an {@link OAuth2ClientAuthenticationToken}
 	 */
-	public final void setAuthenticationConverter(AuthenticationConverter authenticationConverter) {
+	public void setAuthenticationConverter(AuthenticationConverter authenticationConverter) {
 		Assert.notNull(authenticationConverter, "authenticationConverter cannot be null");
 		this.authenticationConverter = authenticationConverter;
 	}
@@ -131,7 +131,7 @@ public class OAuth2ClientAuthenticationFilter extends OncePerRequestFilter {
 	 *
 	 * @param authenticationSuccessHandler the {@link AuthenticationSuccessHandler} used for handling successful authentications
 	 */
-	public final void setAuthenticationSuccessHandler(AuthenticationSuccessHandler authenticationSuccessHandler) {
+	public void setAuthenticationSuccessHandler(AuthenticationSuccessHandler authenticationSuccessHandler) {
 		Assert.notNull(authenticationSuccessHandler, "authenticationSuccessHandler cannot be null");
 		this.authenticationSuccessHandler = authenticationSuccessHandler;
 	}
@@ -141,7 +141,7 @@ public class OAuth2ClientAuthenticationFilter extends OncePerRequestFilter {
 	 *
 	 * @param authenticationFailureHandler the {@link AuthenticationFailureHandler} used for handling failed authentications
 	 */
-	public final void setAuthenticationFailureHandler(AuthenticationFailureHandler authenticationFailureHandler) {
+	public void setAuthenticationFailureHandler(AuthenticationFailureHandler authenticationFailureHandler) {
 		Assert.notNull(authenticationFailureHandler, "authenticationFailureHandler cannot be null");
 		this.authenticationFailureHandler = authenticationFailureHandler;
 	}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/OAuth2TokenEndpointFilter.java

@@ -91,7 +91,7 @@ import org.springframework.web.filter.OncePerRequestFilter;
  * @see OAuth2ClientCredentialsAuthenticationProvider
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-3.2">Section 3.2 Token Endpoint</a>
  */
-public class OAuth2TokenEndpointFilter extends OncePerRequestFilter {
+public final class OAuth2TokenEndpointFilter extends OncePerRequestFilter {
 	/**
 	 * The default endpoint {@code URI} for access token requests.
 	 */
@@ -176,7 +176,7 @@ public class OAuth2TokenEndpointFilter extends OncePerRequestFilter {
 	 *
 	 * @param authenticationConverter the {@link AuthenticationConverter} used when attempting to extract an Access Token Request from {@link HttpServletRequest}
 	 */
-	public final void setAuthenticationConverter(AuthenticationConverter authenticationConverter) {
+	public void setAuthenticationConverter(AuthenticationConverter authenticationConverter) {
 		Assert.notNull(authenticationConverter, "authenticationConverter cannot be null");
 		this.authenticationConverter = authenticationConverter;
 	}
@@ -187,7 +187,7 @@ public class OAuth2TokenEndpointFilter extends OncePerRequestFilter {
 	 *
 	 * @param authenticationSuccessHandler the {@link AuthenticationSuccessHandler} used for handling an {@link OAuth2AccessTokenAuthenticationToken}
 	 */
-	public final void setAuthenticationSuccessHandler(AuthenticationSuccessHandler authenticationSuccessHandler) {
+	public void setAuthenticationSuccessHandler(AuthenticationSuccessHandler authenticationSuccessHandler) {
 		Assert.notNull(authenticationSuccessHandler, "authenticationSuccessHandler cannot be null");
 		this.authenticationSuccessHandler = authenticationSuccessHandler;
 	}
@@ -198,7 +198,7 @@ public class OAuth2TokenEndpointFilter extends OncePerRequestFilter {
 	 *
 	 * @param authenticationFailureHandler the {@link AuthenticationFailureHandler} used for handling an {@link OAuth2AuthenticationException}
 	 */
-	public final void setAuthenticationFailureHandler(AuthenticationFailureHandler authenticationFailureHandler) {
+	public void setAuthenticationFailureHandler(AuthenticationFailureHandler authenticationFailureHandler) {
 		Assert.notNull(authenticationFailureHandler, "authenticationFailureHandler cannot be null");
 		this.authenticationFailureHandler = authenticationFailureHandler;
 	}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/OAuth2TokenIntrospectionEndpointFilter.java

@@ -58,7 +58,7 @@ import org.springframework.web.filter.OncePerRequestFilter;
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7662#section-2.1">Section 2.1 Introspection Request</a>
  * @since 0.1.1
  */
-public class OAuth2TokenIntrospectionEndpointFilter extends OncePerRequestFilter {
+public final class OAuth2TokenIntrospectionEndpointFilter extends OncePerRequestFilter {
 	/**
 	 * The default endpoint {@code URI} for token introspection requests.
 	 */

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/OAuth2TokenRevocationEndpointFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 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.
@@ -53,7 +53,7 @@ import java.io.IOException;
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7009#section-2.1">Section 2.1 Revocation Request</a>
  * @since 0.0.3
  */
-public class OAuth2TokenRevocationEndpointFilter extends OncePerRequestFilter {
+public final class OAuth2TokenRevocationEndpointFilter extends OncePerRequestFilter {
 	/**
 	 * The default endpoint {@code URI} for token revocation requests.
 	 */