Polishing.

Original pull request #1894

Author: ngocnhan-tran1996

spring-data-jdbc/src/test/java/org/springframework/data/jdbc/repository/support/SimpleJdbcRepositoryUnitTests.java

@@ -42,7 +42,7 @@ public class SimpleJdbcRepositoryUnitTests {
 	@Test // DATAJDBC-252
 	public void saveReturnsEntityProducedByOperations() {
 
-		SimpleJdbcRepository<Sample, Object> repository = new SimpleJdbcRepository<>(operations, entity,converter);
+		SimpleJdbcRepository<Sample, Object> repository = new SimpleJdbcRepository<>(operations, entity, converter);
 
 		Sample expected = new Sample();
 		doReturn(expected).when(operations).save(any());

spring-data-r2dbc/src/main/java/org/springframework/data/r2dbc/dialect/OracleDialect.java

@@ -53,7 +53,7 @@ private static String filterBindMarker(CharSequence input) {
 			}
 		}
 
-		if (builder.length() == 0) {
+		if (builder.isEmpty()) {
 			return "";
 		}
 

spring-data-r2dbc/src/main/java/org/springframework/data/r2dbc/dialect/SqlServerDialect.java

@@ -50,7 +50,7 @@ private static String filterBindMarker(CharSequence input) {
 			}
 		}
 
-		if (builder.length() == 0) {
+		if (builder.isEmpty()) {
 			return "";
 		}
 

spring-data-relational/src/main/java/org/springframework/data/relational/core/dialect/AbstractDialect.java

@@ -196,7 +196,7 @@ enum PrependWithLeadingWhitespace implements Function<CharSequence, CharSequence
 		@Override
 		public CharSequence apply(CharSequence charSequence) {
 
-			if (charSequence.length() == 0) {
+			if (charSequence.isEmpty()) {
 				return charSequence;
 			}
 

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/render/InVisitor.java

@@ -47,7 +47,7 @@ Delegation leaveNested(Visitable segment) {
 				part.append(", ");
 			}
 
-			if (part.length() == 0) {
+			if (part.isEmpty()) {
 				part.append(renderedPart);
 				if (notIn) {
 					part.append(" NOT");