Clarify variable names

Issue gh-11327

config/src/main/java/org/springframework/security/config/http/DefaultFilterChainValidator.java

@@ -134,11 +134,13 @@ public class DefaultFilterChainValidator implements FilterChainProxy.FilterChain
 	 * interceptor
 	 */
 	private void checkLoginPageIsntProtected(FilterChainProxy fcp, List<Filter> filterStack) {
-		ExceptionTranslationFilter etf = getFilter(ExceptionTranslationFilter.class, filterStack);
-		if (etf == null || !(etf.getAuthenticationEntryPoint() instanceof LoginUrlAuthenticationEntryPoint)) {
+		ExceptionTranslationFilter exceptions = getFilter(ExceptionTranslationFilter.class, filterStack);
+		if (exceptions == null
+				|| !(exceptions.getAuthenticationEntryPoint() instanceof LoginUrlAuthenticationEntryPoint)) {
 			return;
 		}
-		String loginPage = ((LoginUrlAuthenticationEntryPoint) etf.getAuthenticationEntryPoint()).getLoginFormUrl();
+		String loginPage = ((LoginUrlAuthenticationEntryPoint) exceptions.getAuthenticationEntryPoint())
+				.getLoginFormUrl();
 		this.logger.info("Checking whether login URL '" + loginPage + "' is accessible with your configuration");
 		FilterInvocation loginRequest = new FilterInvocation(loginPage, "POST");
 		List<Filter> filters = null;
@@ -159,28 +161,28 @@ public class DefaultFilterChainValidator implements FilterChainProxy.FilterChain
 			this.logger.debug("Default generated login page is in use");
 			return;
 		}
-		FilterSecurityInterceptor fsi = getFilter(FilterSecurityInterceptor.class, filters);
-		FilterInvocationSecurityMetadataSource fids = fsi.getSecurityMetadataSource();
+		FilterSecurityInterceptor authorizationInterceptor = getFilter(FilterSecurityInterceptor.class, filters);
+		FilterInvocationSecurityMetadataSource fids = authorizationInterceptor.getSecurityMetadataSource();
 		Collection<ConfigAttribute> attributes = fids.getAttributes(loginRequest);
 		if (attributes == null) {
 			this.logger.debug("No access attributes defined for login page URL");
-			if (fsi.isRejectPublicInvocations()) {
+			if (authorizationInterceptor.isRejectPublicInvocations()) {
 				this.logger.warn("FilterSecurityInterceptor is configured to reject public invocations."
 						+ " Your login page may not be accessible.");
 			}
 			return;
 		}
-		AnonymousAuthenticationFilter anonPF = getFilter(AnonymousAuthenticationFilter.class, filters);
-		if (anonPF == null) {
+		AnonymousAuthenticationFilter anonymous = getFilter(AnonymousAuthenticationFilter.class, filters);
+		if (anonymous == null) {
 			this.logger.warn("The login page is being protected by the filter chain, but you don't appear to have"
 					+ " anonymous authentication enabled. This is almost certainly an error.");
 			return;
 		}
 		// Simulate an anonymous access with the supplied attributes.
-		AnonymousAuthenticationToken token = new AnonymousAuthenticationToken("key", anonPF.getPrincipal(),
-				anonPF.getAuthorities());
+		AnonymousAuthenticationToken token = new AnonymousAuthenticationToken("key", anonymous.getPrincipal(),
+				anonymous.getAuthorities());
 		try {
-			fsi.getAccessDecisionManager().decide(token, loginRequest, attributes);
+			authorizationInterceptor.getAccessDecisionManager().decide(token, loginRequest, attributes);
 		}
 		catch (AccessDeniedException ex) {
 			this.logger.warn("Anonymous access to the login page doesn't appear to be enabled. "

config/src/test/java/org/springframework/security/config/http/DefaultFilterChainValidatorTests.java

@@ -53,7 +53,7 @@ public class DefaultFilterChainValidatorTests {
 
 	private DefaultFilterChainValidator validator;
 
-	private FilterChainProxy fcp;
+	private FilterChainProxy chain;
 
 	@Mock
 	private Log logger;
@@ -64,19 +64,19 @@ public class DefaultFilterChainValidatorTests {
 	@Mock
 	private AccessDecisionManager accessDecisionManager;
 
-	private FilterSecurityInterceptor fsi;
+	private FilterSecurityInterceptor authorizationInterceptor;
 
 	@BeforeEach
 	public void setUp() {
 		AnonymousAuthenticationFilter aaf = new AnonymousAuthenticationFilter("anonymous");
-		this.fsi = new FilterSecurityInterceptor();
-		this.fsi.setAccessDecisionManager(this.accessDecisionManager);
-		this.fsi.setSecurityMetadataSource(this.metadataSource);
+		this.authorizationInterceptor = new FilterSecurityInterceptor();
+		this.authorizationInterceptor.setAccessDecisionManager(this.accessDecisionManager);
+		this.authorizationInterceptor.setSecurityMetadataSource(this.metadataSource);
 		AuthenticationEntryPoint authenticationEntryPoint = new LoginUrlAuthenticationEntryPoint("/login");
 		ExceptionTranslationFilter etf = new ExceptionTranslationFilter(authenticationEntryPoint);
 		DefaultSecurityFilterChain securityChain = new DefaultSecurityFilterChain(AnyRequestMatcher.INSTANCE, aaf, etf,
-				this.fsi);
-		this.fcp = new FilterChainProxy(securityChain);
+				this.authorizationInterceptor);
+		this.chain = new FilterChainProxy(securityChain);
 		this.validator = new DefaultFilterChainValidator();
 		ReflectionTestUtils.setField(this.validator, "logger", this.logger);
 	}
@@ -88,7 +88,7 @@ public class DefaultFilterChainValidatorTests {
 		IllegalArgumentException toBeThrown = new IllegalArgumentException("failed to eval expression");
 		willThrow(toBeThrown).given(this.accessDecisionManager).decide(any(Authentication.class), anyObject(),
 				any(Collection.class));
-		this.validator.validate(this.fcp);
+		this.validator.validate(this.chain);
 		verify(this.logger).info(
 				"Unable to check access to the login page to determine if anonymous access is allowed. This might be an error, but can happen under normal circumstances.",
 				toBeThrown);
@@ -99,8 +99,8 @@ public class DefaultFilterChainValidatorTests {
 	public void validateCustomMetadataSource() {
 		FilterInvocationSecurityMetadataSource customMetaDataSource = mock(
 				FilterInvocationSecurityMetadataSource.class);
-		this.fsi.setSecurityMetadataSource(customMetaDataSource);
-		this.validator.validate(this.fcp);
+		this.authorizationInterceptor.setSecurityMetadataSource(customMetaDataSource);
+		this.validator.validate(this.chain);
 		verify(customMetaDataSource).getAttributes(any());
 	}