Make ModifiedClassPathExtension package private

Meta-annotate `ClassPathExclusions` and `ClassPathOverrides` with
so that the `ModifiedClassPathExtension` no longer needs to be
used directly.

See gh-17491

spring-boot-project/spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/runner/classpath/ClassPathExclusions.java

@@ -23,9 +23,10 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
+import org.junit.jupiter.api.extension.ExtendWith;
+
 /**
- * Annotation used in combination with {@link ModifiedClassPathExtension} to exclude
- * entries from the classpath.
+ * Annotation used to exclude entries from the classpath.
  *
  * @author Andy Wilkinson
  * @since 1.5.0
@@ -33,6 +34,7 @@ import java.lang.annotation.Target;
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.TYPE)
 @Documented
+@ExtendWith(ModifiedClassPathExtension.class)
 public @interface ClassPathExclusions {
 
 	/**

spring-boot-project/spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/runner/classpath/ClassPathOverrides.java

@@ -22,9 +22,10 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
+import org.junit.jupiter.api.extension.ExtendWith;
+
 /**
- * Annotation used in combination with {@link ModifiedClassPathExtension} to override
- * entries on the classpath.
+ * Annotation used to override entries on the classpath.
  *
  * @author Andy Wilkinson
  * @since 1.5.0
@@ -32,6 +33,7 @@ import java.lang.annotation.Target;
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.TYPE)
 @Documented
+@ExtendWith(ModifiedClassPathExtension.class)
 public @interface ClassPathOverrides {
 
 	/**

spring-boot-project/spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/runner/classpath/ModifiedClassPathExtension.java

@@ -41,9 +41,8 @@ import org.springframework.util.ReflectionUtils;
  * test class and as the thread context class loader while the test is being run.
  *
  * @author Christoph Dreis
- * @since 2.2.0
  */
-public class ModifiedClassPathExtension implements InvocationInterceptor {
+class ModifiedClassPathExtension implements InvocationInterceptor {
 
 	@Override
 	public void interceptBeforeAllMethod(Invocation<Void> invocation,

spring-boot-project/spring-boot-tools/spring-boot-test-support/src/test/java/org/springframework/boot/testsupport/runner/classpath/ModifiedClassPathExtensionExclusionsTests.java

@@ -18,7 +18,6 @@ package org.springframework.boot.testsupport.runner.classpath;
 
 import org.hamcrest.Matcher;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.hamcrest.Matchers.isA;
@@ -28,7 +27,6 @@ import static org.hamcrest.Matchers.isA;
  *
  * @author Christoph Dreis
  */
-@ExtendWith(ModifiedClassPathExtension.class)
 @ClassPathExclusions("hibernate-validator-*.jar")
 class ModifiedClassPathExtensionExclusionsTests {
 

spring-boot-project/spring-boot-tools/spring-boot-test-support/src/test/java/org/springframework/boot/testsupport/runner/classpath/ModifiedClassPathExtensionOverridesTests.java

@@ -17,7 +17,6 @@
 package org.springframework.boot.testsupport.runner.classpath;
 
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
 
 import org.springframework.context.ApplicationContext;
 import org.springframework.util.StringUtils;
@@ -29,7 +28,6 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Christoph Dreis
  */
-@ExtendWith(ModifiedClassPathExtension.class)
 @ClassPathOverrides("org.springframework:spring-context:4.1.0.RELEASE")
 class ModifiedClassPathExtensionOverridesTests {