Polishing.

Improve pattern variable naming, use ClassUtils.getDescriptiveType(…) to avoid null-pointer exceptions. Simplify RedisOperationChain condition checks.

See #2788

Author: mp911de

src/main/java/org/springframework/data/redis/repository/query/RedisQueryCreator.java

@@ -15,6 +15,7 @@
  */
 package org.springframework.data.redis.repository.query;
 
+import java.util.Collection;
 import java.util.Iterator;
 
 import org.springframework.dao.InvalidDataAccessApiUsageException;
@@ -30,6 +31,7 @@
 import org.springframework.data.repository.query.parser.Part;
 import org.springframework.data.repository.query.parser.PartTree;
 import org.springframework.lang.Nullable;
+import org.springframework.util.ClassUtils;
 import org.springframework.util.CollectionUtils;
 
 /**
@@ -80,17 +82,15 @@ protected RedisOperationChain or(RedisOperationChain base, RedisOperationChain c
 	}
 
 	@Override
-	protected KeyValueQuery<RedisOperationChain> complete(@Nullable final RedisOperationChain criteria, Sort sort) {
+	protected KeyValueQuery<RedisOperationChain> complete(@Nullable RedisOperationChain criteria, Sort sort) {
 
 		KeyValueQuery<RedisOperationChain> query = new KeyValueQuery<>(criteria);
 
-		if (criteria != null && !CollectionUtils.isEmpty(criteria.getSismember())
-				&& !CollectionUtils.isEmpty(criteria.getOrSismember()))
-			if (criteria.getSismember().size() == 1 && criteria.getOrSismember().size() == 1) {
-
-				criteria.getOrSismember().add(criteria.getSismember().iterator().next());
-				criteria.getSismember().clear();
-			}
+		if (criteria != null && containsExactlyOne(criteria.getSismember())
+				&& containsExactlyOne(criteria.getOrSismember())) {
+			criteria.getOrSismember().addAll(criteria.getSismember());
+			criteria.getSismember().clear();
+		}
 
 		if (sort.isSorted()) {
 			query.setSort(sort);
@@ -111,29 +111,33 @@ private NearPath getNearPath(Part part, Iterator<Object> iterator) {
 		if (value instanceof Point point) {
 
 			if (!iterator.hasNext()) {
-				String message = "Expected to find distance value for geo query; Are you missing a parameter";
+				String message = "Expected to find distance value for geo query; Are you missing a parameter?";
 				throw new InvalidDataAccessApiUsageException(message);
 			}
 
 			Distance distance;
 			Object distObject = iterator.next();
 
-			if (distObject instanceof Distance distanceValue) {
-				distance = distanceValue;
-			} else if (distObject instanceof Number numberValue) {
-				distance = new Distance(numberValue.doubleValue(), Metrics.KILOMETERS);
+			if (distObject instanceof Distance dist) {
+				distance = dist;
+			} else if (distObject instanceof Number num) {
+				distance = new Distance(num.doubleValue(), Metrics.KILOMETERS);
 			} else {
 
 				String message = String.format("Expected to find Distance or Numeric value for geo query but was %s",
-						distObject.getClass());
+						ClassUtils.getDescriptiveType(distObject));
 				throw new InvalidDataAccessApiUsageException(message);
 			}
 
 			return new NearPath(path, point, distance);
 		}
 
-		String message = String.format("Expected to find a Circle or Point/Distance for geo query but was %s.",
-				value.getClass());
+		String message = String.format("Expected to find a Circle or Point/Distance for geo query but was %s",
+				ClassUtils.getDescriptiveType(value.getClass()));
 		throw new InvalidDataAccessApiUsageException(message);
 	}
+
+	private static boolean containsExactlyOne(Collection<?> collection) {
+		return !CollectionUtils.isEmpty(collection) && collection.size() == 1;
+	}
 }