Polishing.

Rename builder for ExpirationOptions, remove unused import and update javadoc.

Original Pull Request: #3115

src/main/java/org/springframework/data/redis/connection/ExpirationOptions.java

@@ -46,8 +46,8 @@ public class ExpirationOptions {
 	/**
 	 * @return builder for creating {@code FieldExpireOptionsBuilder}.
 	 */
-	public static FieldExpireOptionsBuilder builder() {
-		return new FieldExpireOptionsBuilder();
+	public static ExpirationOptionsBuilder builder() {
+		return new ExpirationOptionsBuilder();
 	}
 
 	public Condition getCondition() {
@@ -74,32 +74,44 @@ public class ExpirationOptions {
 	/**
 	 * Builder to build {@link ExpirationOptions}
 	 */
-	public static class FieldExpireOptionsBuilder {
+	public static class ExpirationOptionsBuilder {
 
 		private Condition condition = Condition.ALWAYS;
 
-		private FieldExpireOptionsBuilder() {}
+		private ExpirationOptionsBuilder() {}
 
+		/**
+		 * Apply to fields that have no expiration.
+		 */
 		@Contract("-> this")
-		public FieldExpireOptionsBuilder nx() {
+		public ExpirationOptionsBuilder nx() {
 			this.condition = Condition.NX;
 			return this;
 		}
 
+		/**
+		 * Apply to fields that have an existing expiration.
+		 */
 		@Contract("-> this")
-		public FieldExpireOptionsBuilder xx() {
+		public ExpirationOptionsBuilder xx() {
 			this.condition = Condition.XX;
 			return this;
 		}
 
+		/**
+		 * Apply to fields when the new expiration is greater than the current one.
+		 */
 		@Contract("-> this")
-		public FieldExpireOptionsBuilder gt() {
+		public ExpirationOptionsBuilder gt() {
 			this.condition = Condition.GT;
 			return this;
 		}
 
+		/**
+		 * Apply to fields when the new expiration is lower than the current one.
+		 */
 		@Contract("-> this")
-		public FieldExpireOptionsBuilder lt() {
+		public ExpirationOptionsBuilder lt() {
 			this.condition = Condition.LT;
 			return this;
 		}

src/main/java/org/springframework/data/redis/core/ReactiveRedisOperations.java

@@ -382,7 +382,7 @@ public interface ReactiveRedisOperations<K, V> {
 	 * @param key must not be {@literal null}.
 	 * @param expiration must not be {@literal null}.
 	 * @param options must not be {@literal null}.
-	 * @throws IllegalArgumentException if the instant is {@literal null} or too large to represent as a {@code Date}.
+	 * @throws IllegalArgumentException any of required arguments is {@literal null}.
 	 * @see <a href="https://redis.io/commands/expire">Redis Documentation: EXPIRE</a>
 	 * @see <a href="https://redis.io/commands/pexpire">Redis Documentation: PEXPIRE</a>
 	 * @see <a href="https://redis.io/commands/expireat">Redis Documentation: EXPIREAT</a>

src/main/java/org/springframework/data/redis/core/RedisOperations.java

@@ -375,7 +375,7 @@ public interface RedisOperations<K, V> {
 	 * @param expiration must not be {@literal null}.
 	 * @param options must not be {@literal null}.
 	 * @return changes to the expiry. {@literal null} when used in pipeline / transaction.
-	 * @throws IllegalArgumentException if the instant is {@literal null} or too large to represent as a {@code Date}.
+	 * @throws IllegalArgumentException any of the required arguments is {@literal null}.
 	 * @see <a href="https://redis.io/commands/expire">Redis Documentation: EXPIRE</a>
 	 * @see <a href="https://redis.io/commands/pexpire">Redis Documentation: PEXPIRE</a>
 	 * @see <a href="https://redis.io/commands/expireat">Redis Documentation: EXPIREAT</a>

src/main/java/org/springframework/data/redis/core/types/Expiration.java

@@ -16,7 +16,6 @@
 package org.springframework.data.redis.core.types;
 
 import java.time.Duration;
-import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 
 import org.springframework.data.redis.core.TimeoutUtils;