Polishing

spring-context/src/main/java/org/springframework/context/annotation/DeferredImportSelector.java

@@ -16,8 +16,6 @@
 
 package org.springframework.context.annotation;
 
-import java.util.Objects;
-
 import org.springframework.core.type.AnnotationMetadata;
 import org.springframework.lang.Nullable;
 
@@ -100,7 +98,7 @@ public interface DeferredImportSelector extends ImportSelector {
 			}
 
 			@Override
-			public boolean equals(Object other) {
+			public boolean equals(@Nullable Object other) {
 				if (this == other) {
 					return true;
 				}
@@ -108,13 +106,17 @@ public interface DeferredImportSelector extends ImportSelector {
 					return false;
 				}
 				Entry entry = (Entry) other;
-				return (Objects.equals(this.metadata, entry.metadata) &&
-						Objects.equals(this.importClassName, entry.importClassName));
+				return (this.metadata.equals(entry.metadata) && this.importClassName.equals(entry.importClassName));
 			}
 
 			@Override
 			public int hashCode() {
-				return Objects.hash(this.metadata, this.importClassName);
+				return (this.metadata.hashCode() * 31 + this.importClassName.hashCode());
+			}
+
+			@Override
+			public String toString() {
+				return this.importClassName;
 			}
 		}
 	}

spring-core/src/main/java/org/springframework/util/unit/DataUnit.java

 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -16,38 +16,53 @@
 
 package org.springframework.util.unit;
 
-import java.util.Objects;
-
 /**
- * A standard set of data size units.
+ * A standard set of {@link DataSize} units.
+ *
+ * <p>The unit prefixes used in this class are
+ * <a href="https://en.wikipedia.org/wiki/Binary_prefix">binary prefixes</a>
+ * indicating multiplication by powers of 2. The following table displays the
+ * enum constants defined in this class and corresponding values.
+ *
+ * <p>
+ * <table border="1">
+ * <tr><th>Constant</th><th>Data Size</th><th>Power&nbsp;of&nbsp;2</th><th>Size in Bytes</th></tr>
+ * <tr><td>{@link #BYTES}</td><td>1B</td><td>2^0</td><td>1</td></tr>
+ * <tr><td>{@link #KILOBYTES}</td><td>1KB</td><td>2^10</td><td>1,024</td></tr>
+ * <tr><td>{@link #MEGABYTES}</td><td>1MB</td><td>2^20</td><td>1,048,576</td></tr>
+ * <tr><td>{@link #GIGABYTES}</td><td>1GB</td><td>2^30</td><td>1,073,741,824</td></tr>
+ * <tr><td>{@link #TERABYTES}</td><td>1TB</td><td>2^40</td><td>1,099,511,627,776</td></tr>
+ * </table>
  *
  * @author Stephane Nicoll
+ * @author Sam Brannen
  * @since 5.1
+ * @see DataSize
  */
 public enum DataUnit {
 
 	/**
-	 * Bytes.
+	 * Bytes, represented by suffix {@code B}.
 	 */
 	BYTES("B", DataSize.ofBytes(1)),
 
 	/**
-	 * Kilobytes.
+	 * Kilobytes, represented by suffix {@code KB}.
 	 */
 	KILOBYTES("KB", DataSize.ofKilobytes(1)),
 
 	/**
-	 * Megabytes.
+	 * Megabytes, represented by suffix {@code MB}.
 	 */
 	MEGABYTES("MB", DataSize.ofMegabytes(1)),
 
 	/**
-	 * Gigabytes.
+	 * Gigabytes, represented by suffix {@code GB}.
 	 */
 	GIGABYTES("GB", DataSize.ofGigabytes(1)),
 
 	/**
-	 * Terabytes.
+	 * Terabytes, represented by suffix {@code TB}.
 	 */
 	TERABYTES("TB", DataSize.ofTerabytes(1));
 
@@ -68,18 +83,18 @@ public enum DataUnit {
 
 	/**
 	 * Return the {@link DataUnit} matching the specified {@code suffix}.
-	 * @param suffix one of the standard suffix
+	 * @param suffix one of the standard suffixes
 	 * @return the {@link DataUnit} matching the specified {@code suffix}
-	 * @throws IllegalArgumentException if the suffix does not match any
-	 * of this enum's constants
+	 * @throws IllegalArgumentException if the suffix does not match the suffix
+	 * of any of this enum's constants
 	 */
 	public static DataUnit fromSuffix(String suffix) {
 		for (DataUnit candidate : values()) {
-			if (Objects.equals(candidate.suffix, suffix)) {
+			if (candidate.suffix.equals(suffix)) {
 				return candidate;
 			}
 		}
-		throw new IllegalArgumentException("Unknown unit '" + suffix + "'");
+		throw new IllegalArgumentException("Unknown data unit suffix '" + suffix + "'");
 	}
 
 }

spring-messaging/src/main/java/org/springframework/messaging/simp/user/MultiServerUserRegistry.java

@@ -560,7 +560,6 @@ public class MultiServerUserRegistry implements SimpUserRegistry, SmartApplicati
 			}
 			return map;
 		}
-
 	}
 
 }

spring-tx/src/test/java/org/springframework/transaction/interceptor/TransactionInterceptorTests.java

 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2019 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.
@@ -40,6 +40,7 @@ import static org.mockito.BDDMockito.*;
  * Mock object based tests for TransactionInterceptor.
  *
  * @author Rod Johnson
+ * @author Juergen Hoeller
  * @since 16.03.2003
  */
 public class TransactionInterceptorTests extends AbstractTransactionAspectTests {
@@ -49,7 +50,7 @@ public class TransactionInterceptorTests extends AbstractTransactionAspectTests
 
 
 	@Override
-	protected Object advised(Object target, PlatformTransactionManager ptm, TransactionAttributeSource[] tas) throws Exception {
+	protected Object advised(Object target, PlatformTransactionManager ptm, TransactionAttributeSource[] tas) {
 		TransactionInterceptor ti = new TransactionInterceptor();
 		ti.setTransactionManager(ptm);
 		ti.setTransactionAttributeSources(tas);