Enforce checkstyle header rule

Enforce the checkstyle header rule and fix a few classes that had
malformed headers.

Issue gh-8945

core/src/main/java/org/springframework/security/access/expression/method/ExpressionBasedPreInvocationAdvice.java

@@ -13,9 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/**
- *
- */
 
 package org.springframework.security.access.expression.method;
 

core/src/main/java/org/springframework/security/core/ComparableVersion.java

@@ -16,25 +16,6 @@
 
 package org.springframework.security.core;
 
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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
- *
- *  https://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.
- */
-
 import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.Arrays;

core/src/test/java/org/springframework/security/authentication/dao/MockUserCache.java

@@ -13,9 +13,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/**
- *
- */
 
 package org.springframework.security.authentication.dao;
 

etc/checkstyle/checkstyle-suppressions.xml

@@ -3,7 +3,6 @@
 		"-//Checkstyle//DTD SuppressionFilter Configuration 1.2//EN"
 		"https://checkstyle.org/dtds/suppressions_1_2.dtd">
 <suppressions>
-	<suppress files=".*" checks="SpringHeader" />
 	<suppress files=".*" checks="SpringHideUtilityClassConstructor" />
 	<suppress files=".*" checks="SpringJavadoc" />
 	<suppress files=".*" checks="SpringLambda" />

etc/checkstyle/checkstyle.xml

@@ -7,5 +7,11 @@
 		<property name="file"
 			value="${config_loc}/checkstyle-suppressions.xml" />
 	</module>
-	<module name="io.spring.javaformat.checkstyle.SpringChecks" />
+	<module name="com.puppycrawl.tools.checkstyle.checks.header.RegexpHeaderCheck">
+		<property name="headerFile" value="${config_loc}/header.txt" />
+		<property name="fileExtensions" value="java" />
+	</module>
+	<module name="io.spring.javaformat.checkstyle.SpringChecks">
+		<property name="excludes" value="io.spring.javaformat.checkstyle.check.SpringHeaderCheck" />
+	</module>
 </module>

etc/checkstyle/header.txt

@@ -0,0 +1,16 @@
+^\Q/*\E$
+^\Q * Copyright \E20\d\d(-20\d\d)?(, \d\d\d\d)*\ (Acegi Technology Pty Limited|the original author or authors.)$
+^\Q *\E$
+^\Q * Licensed under the Apache License, Version 2.0 (the "License");\E$
+^\Q * you may not use this file except in compliance with the License.\E$
+^\Q * You may obtain a copy of the License at\E$
+^\Q *\E$
+^\Q *      https://www.apache.org/licenses/LICENSE-2.0\E$
+^\Q *\E$
+^\Q * Unless required by applicable law or agreed to in writing, software\E$
+^\Q * distributed under the License is distributed on an "AS IS" BASIS,\E$
+^\Q * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\E$
+^\Q * See the License for the specific language governing permissions and\E$
+^\Q * limitations under the License.\E$
+^\Q */\E$
+^$