easy refactorings

Author: schauder

spring-data-relational/src/main/java/org/springframework/data/relational/core/mapping/AggregatePath.java

@@ -439,7 +439,7 @@ public ColumnInfo reverseColumnInfo() {
 		 * @return ColumnInfos representing the effective id of this entity. Guaranteed not to be {@literal null}.
 		 */
 		public ColumnInfos effectiveIdColumnInfos() {
-			return backReferenceColumnInfos.columnInfos.isEmpty() ? idColumnInfos : backReferenceColumnInfos;
+			return backReferenceColumnInfos.isEmpty() ? idColumnInfos : backReferenceColumnInfos;
 		}
 	}
 
@@ -524,7 +524,7 @@ public static ColumnInfos empty(AggregatePath basePath) {
 		 */
 		public ColumnInfo unique() {
 
-			Collection<ColumnInfo> values = columnInfos.values();
+			Collection<ColumnInfo> values = longColumnInfos.values();
 			Assert.state(values.size() == 1, "ColumnInfo is not unique");
 			return values.iterator().next();
 		}
@@ -537,7 +537,7 @@ public ColumnInfo unique() {
 		 */
 		public ColumnInfo any() {
 
-			Collection<ColumnInfo> values = columnInfos.values();
+			Collection<ColumnInfo> values = longColumnInfos.values();
 			return values.iterator().next();
 		}