Polishing.

Move off deprecated StringUtils.isEmpty.

See #1098

Author: mp911de

spring-data-cassandra/src/main/java/org/springframework/data/cassandra/config/CassandraEntityClassScanner.java

@@ -30,7 +30,7 @@
 import org.springframework.data.cassandra.core.mapping.Table;
 import org.springframework.lang.Nullable;
 import org.springframework.util.ClassUtils;
-import org.springframework.util.StringUtils;
+import org.springframework.util.ObjectUtils;
 
 /**
  * Scans packages for Cassandra entities. The entity scanner scans for entity classes annotated with
@@ -208,7 +208,7 @@ protected Set<Class<?>> scanBasePackageForEntities(String basePackage) throws Cl
 
 		HashSet<Class<?>> classes = new HashSet<>();
 
-		if (StringUtils.isEmpty(basePackage)) {
+		if (ObjectUtils.isEmpty(basePackage)) {
 			return classes;
 		}
 

spring-data-cassandra/src/main/java/org/springframework/data/cassandra/core/convert/DefaultColumnTypeResolver.java

@@ -45,7 +45,7 @@
 import org.springframework.data.util.TypeInformation;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
-import org.springframework.util.StringUtils;
+import org.springframework.util.ObjectUtils;
 
 import com.datastax.oss.driver.api.core.CqlIdentifier;
 import com.datastax.oss.driver.api.core.data.TupleValue;
@@ -104,7 +104,7 @@ public CassandraColumnType resolve(CassandraPersistentProperty property) {
 
 			CassandraType annotation = property.getRequiredAnnotation(CassandraType.class);
 
-			if (annotation.type() == Name.UDT && StringUtils.isEmpty(annotation.userTypeName())) {
+			if (annotation.type() == Name.UDT && ObjectUtils.isEmpty(annotation.userTypeName())) {
 				throw new InvalidDataAccessApiUsageException(
 						String.format("Expected user type name in property ['%s'] of type ['%s'] in entity [%s]",
 								property.getName(), property.getType(), property.getOwner().getName()));
@@ -251,7 +251,7 @@ public CassandraColumnType resolve(CassandraType annotation) {
 				return ColumnType.tupleOf(DataTypes.tupleOf(dataTypes));
 			case UDT:
 
-				if (StringUtils.isEmpty(annotation.userTypeName())) {
+				if (ObjectUtils.isEmpty(annotation.userTypeName())) {
 					throw new InvalidDataAccessApiUsageException(
 							"Cannot resolve user type for @CassandraType(type=UDT) without userTypeName");
 				}