Polishing

spring-core/src/main/java/org/springframework/core/io/AbstractResource.java

@@ -220,6 +220,16 @@ public abstract class AbstractResource implements Resource {
 		return null;
 	}
 
+	/**
+	 * Lazily access the logger for debug logging in case of an exception.
+	 */
+	private void debug(Supplier<String> message, Throwable ex) {
+		Log logger = LogFactory.getLog(getClass());
+		if (logger.isDebugEnabled()) {
+			logger.debug(message.get(), ex);
+		}
+	}
+
 
 	/**
 	 * This implementation compares description strings.
@@ -249,11 +259,4 @@ public abstract class AbstractResource implements Resource {
 		return getDescription();
 	}
 
-	private void debug(Supplier<String> message, Throwable ex) {
-		Log logger = LogFactory.getLog(getClass());
-		if (logger.isDebugEnabled()) {
-			logger.debug(message.get(), ex);
-		}
-	}
-
 }

spring-core/src/main/java/org/springframework/core/io/ClassPathResource.java

@@ -257,7 +257,7 @@ public class ClassPathResource extends AbstractFileResolvingResource {
 	 */
 	@Override
 	public String getDescription() {
-		return "class path resource [" + this.absolutePath + ']';
+		return "class path resource [" + this.absolutePath + "]";
 	}
 
 
@@ -272,7 +272,7 @@ public class ClassPathResource extends AbstractFileResolvingResource {
 		if (this == obj) {
 			return true;
 		}
-		return ((obj instanceof ClassPathResource that) &&
+		return (obj instanceof ClassPathResource that &&
 				this.absolutePath.equals(that.absolutePath) &&
 				ObjectUtils.nullSafeEquals(getClassLoader(), that.getClassLoader()));
 	}

spring-core/src/test/java/org/springframework/core/io/PathResourceTests.java

@@ -70,19 +70,19 @@ class PathResourceTests {
 	@Test
 	void nullPath() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new PathResource((Path) null))
-			.withMessageContaining("Path must not be null");
+				.withMessageContaining("Path must not be null");
 	}
 
 	@Test
 	void nullPathString() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new PathResource((String) null))
-			.withMessageContaining("Path must not be null");
+				.withMessageContaining("Path must not be null");
 	}
 
 	@Test
 	void nullUri() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new PathResource((URI) null))
-			.withMessageContaining("URI must not be null");
+				.withMessageContaining("URI must not be null");
 	}
 
 	@Test
@@ -258,6 +258,17 @@ class PathResourceTests {
 		assertThat(resource.isWritable()).isFalse();
 	}
 
+	@Test
+	void equalsAndHashCode() {
+		Resource mr1 = new PathResource(TEST_FILE);
+		Resource mr2 = new PathResource(TEST_FILE);
+		Resource mr3 = new PathResource(TEST_DIR);
+		assertThat(mr1).isEqualTo(mr2);
+		assertThat(mr1).isNotEqualTo(mr3);
+		assertThat(mr1).hasSameHashCodeAs(mr2);
+		assertThat(mr1).doesNotHaveSameHashCodeAs(mr3);
+	}
+
 	@Test
 	void outputStream(@TempDir Path temporaryFolder) throws IOException {
 		PathResource resource = new PathResource(temporaryFolder.resolve("test"));

spring-web/src/main/java/org/springframework/web/context/support/ServletContextResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -57,7 +57,7 @@ public class ServletContextResource extends AbstractFileResolvingResource implem
 
 
 	/**
-	 * Create a new ServletContextResource.
+	 * Create a new {@code ServletContextResource} for the given path.
 	 * <p>The Servlet spec requires that resource paths start with a slash,
 	 * even if many containers accept paths without leading slash too.
 	 * Consequently, the given path will be prepended with a slash if it
@@ -94,6 +94,7 @@ public class ServletContextResource extends AbstractFileResolvingResource implem
 		return this.path;
 	}
 
+
 	/**
 	 * This implementation checks {@code ServletContext.getResource}.
 	 * @see jakarta.servlet.ServletContext#getResource(String)