Merge "[BUG] Fix memory leak related to using arrays in Hibernate"

9 files changed, 72 insertions, 100 deletions

diff --git a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathUtil.java b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathUtil.java
index bde9b0638f..4ede0d9c90 100644
--- a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathUtil.java
+++ b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathUtil.java
@@ -1,6 +1,6 @@
 /*
  *  ============LICENSE_START=======================================================
- *  Copyright (C) 2022-2023 Nordix Foundation
+ *  Copyright (C) 2022-2024 Nordix Foundation
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -59,12 +59,10 @@ public class CpsPathUtil {
         return getCpsPathBuilder(xpathSource).build().getNormalizedParentPath();
     }
 
-    public static String[] getXpathNodeIdSequence(final String xpathSource) {
-        final List<String> containerNames = getCpsPathBuilder(xpathSource).build().getContainerNames();
-        return containerNames.toArray(new String[containerNames.size()]);
+    public static List<String> getXpathNodeIdSequence(final String xpathSource) {
+        return getCpsPathBuilder(xpathSource).build().getContainerNames();
     }
 
-
     /**
      * Returns boolean indicating xpath is an absolute path to a list element.
      *
diff --git a/cps-ri/src/main/java/org/onap/cps/ri/CpsDataPersistenceServiceImpl.java b/cps-ri/src/main/java/org/onap/cps/ri/CpsDataPersistenceServiceImpl.java
index ec46fea4cb..ee555f7dc8 100644
--- a/cps-ri/src/main/java/org/onap/cps/ri/CpsDataPersistenceServiceImpl.java
+++ b/cps-ri/src/main/java/org/onap/cps/ri/CpsDataPersistenceServiceImpl.java
@@ -341,8 +341,7 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
             if (anchorIds.isEmpty()) {
                 fragmentEntities = fragmentRepository.findByDataspaceAndXpathIn(dataspaceEntity, ancestorXpaths);
             } else {
-                fragmentEntities = fragmentRepository.findByAnchorIdsAndXpathIn(
-                        anchorIds.toArray(new Long[0]), ancestorXpaths.toArray(new String[0]));
+                fragmentEntities = fragmentRepository.findByAnchorIdsAndXpathIn(anchorIds, ancestorXpaths);
             }
 
         }
@@ -475,7 +474,7 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
             fragmentRepository.findAllXpathByAnchorAndXpathIn(anchorEntity, deleteChecklist);
         if (onlySupportListDeletion) {
             final Collection<String> xpathsToExistingListElements = xpathsToExistingContainers.stream()
-                .filter(CpsPathUtil::isPathToListElement).collect(Collectors.toList());
+                .filter(CpsPathUtil::isPathToListElement).toList();
             deleteChecklist.removeAll(xpathsToExistingListElements);
         } else {
             deleteChecklist.removeAll(xpathsToExistingContainers);
@@ -483,15 +482,19 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
 
         final Collection<String> xpathsToExistingLists = deleteChecklist.stream()
             .filter(xpath -> fragmentRepository.existsByAnchorAndXpathStartsWith(anchorEntity, xpath + "["))
-            .collect(Collectors.toList());
+            .toList();
         deleteChecklist.removeAll(xpathsToExistingLists);
 
         if (!deleteChecklist.isEmpty()) {
             throw new DataNodeNotFoundExceptionBatch(dataspaceName, anchorName, deleteChecklist);
         }
 
-        fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
-        fragmentRepository.deleteListsByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingLists);
+        if (!xpathsToExistingContainers.isEmpty()) {
+            fragmentRepository.deleteByAnchorIdAndXpaths(anchorEntity.getId(), xpathsToExistingContainers);
+        }
+        for (final String listXpath : xpathsToExistingLists) {
+            fragmentRepository.deleteListByAnchorIdAndXpath(anchorEntity.getId(), listXpath);
+        }
     }
 
     @Override
diff --git a/cps-ri/src/main/java/org/onap/cps/ri/repository/AnchorRepository.java b/cps-ri/src/main/java/org/onap/cps/ri/repository/AnchorRepository.java
index 7fe14b3173..f7f750c983 100755
--- a/cps-ri/src/main/java/org/onap/cps/ri/repository/AnchorRepository.java
+++ b/cps-ri/src/main/java/org/onap/cps/ri/repository/AnchorRepository.java
@@ -1,7 +1,7 @@
 /*
  *  ============LICENSE_START=======================================================
  *  Copyright (C) 2021 Pantheon.tech
- *  Modifications Copyright (C) 2021-2023 Nordix Foundation
+ *  Modifications Copyright (C) 2021-2024 Nordix Foundation
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -46,26 +46,26 @@ public interface AnchorRepository extends JpaRepository<AnchorEntity, Long> {
 
     Collection<AnchorEntity> findAllBySchemaSet(SchemaSetEntity schemaSetEntity);
 
-    @Query(value = "SELECT * FROM anchor WHERE dataspace_id = :dataspaceId AND name = ANY (:anchorNames)",
+    @Query(value = "SELECT * FROM anchor WHERE dataspace_id = :dataspaceId AND name IN (:anchorNames)",
         nativeQuery = true)
     Collection<AnchorEntity> findAllByDataspaceIdAndNameIn(@Param("dataspaceId") int dataspaceId,
-                                                           @Param("anchorNames") String[] anchorNames);
+                                                           @Param("anchorNames") Collection<String> anchorNames);
 
     default Collection<AnchorEntity> findAllByDataspaceAndNameIn(final DataspaceEntity dataspaceEntity,
                                                                  final Collection<String> anchorNames) {
-        return findAllByDataspaceIdAndNameIn(dataspaceEntity.getId(), anchorNames.toArray(new String[0]));
+        return findAllByDataspaceIdAndNameIn(dataspaceEntity.getId(), anchorNames);
     }
 
     @Query(value = "SELECT a.* FROM anchor a"
         + " LEFT OUTER JOIN schema_set s ON a.schema_set_id = s.id"
-        + " WHERE a.dataspace_id = :dataspaceId AND s.name = ANY (:schemaSetNames)",
+        + " WHERE a.dataspace_id = :dataspaceId AND s.name IN (:schemaSetNames)",
         nativeQuery = true)
-    Collection<AnchorEntity> findAllByDataspaceIdAndSchemaSetNameIn(@Param("dataspaceId") int dataspaceId,
-                                                                    @Param("schemaSetNames") String[] schemaSetNames);
+    Collection<AnchorEntity> findAllByDataspaceIdAndSchemaSetNameIn(
+            @Param("dataspaceId") int dataspaceId, @Param("schemaSetNames") Collection<String> schemaSetNames);
 
     default Collection<AnchorEntity> findAllByDataspaceAndSchemaSetNameIn(final DataspaceEntity dataspaceEntity,
                                                                           final Collection<String> schemaSetNames) {
-        return findAllByDataspaceIdAndSchemaSetNameIn(dataspaceEntity.getId(), schemaSetNames.toArray(new String[0]));
+        return findAllByDataspaceIdAndSchemaSetNameIn(dataspaceEntity.getId(), schemaSetNames);
     }
 
     Integer countByDataspace(DataspaceEntity dataspaceEntity);
@@ -80,7 +80,7 @@ public interface AnchorRepository extends JpaRepository<AnchorEntity, Long> {
                 JOIN anchor ON anchor.schema_set_id = schema_set.id
             WHERE
                     schema_set.dataspace_id = :dataspaceId
-                AND module_name = ANY ( :moduleNames )
+                AND module_name IN (:moduleNames)
             GROUP BY
                 anchor.id,
                 anchor.name,
@@ -90,25 +90,18 @@ public interface AnchorRepository extends JpaRepository<AnchorEntity, Long> {
                 COUNT(DISTINCT module_name) = :sizeOfModuleNames
             """, nativeQuery = true)
     Collection<String> getAnchorNamesByDataspaceIdAndModuleNames(@Param("dataspaceId") int dataspaceId,
-                                                                 @Param("moduleNames") String[] moduleNames,
+                                                                 @Param("moduleNames") Collection<String> moduleNames,
                                                                  @Param("sizeOfModuleNames") int sizeOfModuleNames);
 
-    default Collection<String> getAnchorNamesByDataspaceIdAndModuleNames(final int dataspaceId,
-                                                                         final Collection<String> moduleNames,
-                                                                         final int sizeOfModuleNames) {
-        final String[] moduleNamesArray = moduleNames.toArray(new String[0]);
-        return getAnchorNamesByDataspaceIdAndModuleNames(dataspaceId, moduleNamesArray, sizeOfModuleNames);
-    }
-
     @Modifying
-    @Query(value = "DELETE FROM anchor WHERE dataspace_id = :dataspaceId AND name = ANY (:anchorNames)",
+    @Query(value = "DELETE FROM anchor WHERE dataspace_id = :dataspaceId AND name IN (:anchorNames)",
         nativeQuery = true)
     void deleteAllByDataspaceIdAndNameIn(@Param("dataspaceId") int dataspaceId,
-                                         @Param("anchorNames") String[] anchorNames);
+                                         @Param("anchorNames") Collection<String> anchorNames);
 
     default void deleteAllByDataspaceAndNameIn(final DataspaceEntity dataspaceEntity,
                                                final Collection<String> anchorNames) {
-        deleteAllByDataspaceIdAndNameIn(dataspaceEntity.getId(), anchorNames.toArray(new String[0]));
+        deleteAllByDataspaceIdAndNameIn(dataspaceEntity.getId(), anchorNames);
     }
 
     @Modifying
diff --git a/cps-ri/src/main/java/org/onap/cps/ri/repository/FragmentRepository.java b/cps-ri/src/main/java/org/onap/cps/ri/repository/FragmentRepository.java
index 8edc3f2311..9598230cdb 100755
--- a/cps-ri/src/main/java/org/onap/cps/ri/repository/FragmentRepository.java
+++ b/cps-ri/src/main/java/org/onap/cps/ri/repository/FragmentRepository.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START=======================================================
- * Copyright (C) 2021-2023 Nordix Foundation.
+ * Copyright (C) 2021-2024 Nordix Foundation.
  * Modifications Copyright (C) 2020-2021 Bell Canada.
  * Modifications Copyright (C) 2020-2021 Pantheon.tech.
  * Modifications Copyright (C) 2023 TechMahindra Ltd.
@@ -48,14 +48,14 @@ public interface FragmentRepository extends JpaRepository<FragmentEntity, Long>,
             new DataNodeNotFoundException(anchorEntity.getDataspace().getName(), anchorEntity.getName(), xpath));
     }
 
-    @Query(value = "SELECT * FROM fragment WHERE anchor_id = :anchorId AND xpath = ANY (:xpaths)",
+    @Query(value = "SELECT * FROM fragment WHERE anchor_id = :anchorId AND xpath IN (:xpaths)",
             nativeQuery = true)
     List<FragmentEntity> findByAnchorIdAndXpathIn(@Param("anchorId") long anchorId,
-                                                  @Param("xpaths") String[] xpaths);
+                                                  @Param("xpaths") Collection<String> xpaths);
 
     default List<FragmentEntity> findByAnchorAndXpathIn(final AnchorEntity anchorEntity,
                                                         final Collection<String> xpaths) {
-        return findByAnchorIdAndXpathIn(anchorEntity.getId(), xpaths.toArray(new String[0]));
+        return findByAnchorIdAndXpathIn(anchorEntity.getId(), xpaths);
     }
 
     @Query(value = "SELECT * FROM fragment WHERE anchor_id = :anchorId \n"
@@ -70,58 +70,52 @@ public interface FragmentRepository extends JpaRepository<FragmentEntity, Long>,
     }
 
     @Query(value = "SELECT fragment.* FROM fragment JOIN anchor ON anchor.id = fragment.anchor_id "
-        + "WHERE dataspace_id = :dataspaceId AND xpath = ANY (:xpaths)", nativeQuery = true)
+        + "WHERE dataspace_id = :dataspaceId AND xpath IN (:xpaths)", nativeQuery = true)
     List<FragmentEntity> findByDataspaceIdAndXpathIn(@Param("dataspaceId") int dataspaceId,
-                                                     @Param("xpaths") String[] xpaths);
+                                                     @Param("xpaths") Collection<String> xpaths);
 
     default List<FragmentEntity> findByDataspaceAndXpathIn(final DataspaceEntity dataspaceEntity,
                                                            final Collection<String> xpaths) {
-        return findByDataspaceIdAndXpathIn(dataspaceEntity.getId(), xpaths.toArray(new String[0]));
+        return findByDataspaceIdAndXpathIn(dataspaceEntity.getId(), xpaths);
     }
 
     @Query(value = "SELECT * FROM fragment WHERE anchor_id IN (:anchorIds)"
-            + " AND xpath = ANY (:xpaths)", nativeQuery = true)
-    List<FragmentEntity> findByAnchorIdsAndXpathIn(@Param("anchorIds") Long[] anchorIds,
-                                                   @Param("xpaths") String[] xpaths);
+            + " AND xpath IN (:xpaths)", nativeQuery = true)
+    List<FragmentEntity> findByAnchorIdsAndXpathIn(@Param("anchorIds") Collection<Long> anchorIds,
+                                                   @Param("xpaths") Collection<String> xpaths);
 
     @Query(value = "SELECT * FROM fragment WHERE anchor_id = :anchorId LIMIT 1", nativeQuery = true)
     Optional<FragmentEntity> findOneByAnchorId(@Param("anchorId") long anchorId);
 
     @Modifying
-    @Query(value = "DELETE FROM fragment WHERE anchor_id = ANY (:anchorIds)", nativeQuery = true)
-    void deleteByAnchorIdIn(@Param("anchorIds") long[] anchorIds);
+    @Query(value = "DELETE FROM fragment WHERE anchor_id IN (:anchorIds)", nativeQuery = true)
+    void deleteByAnchorIdIn(@Param("anchorIds") Collection<Long> anchorIds);
 
     default void deleteByAnchorIn(final Collection<AnchorEntity> anchorEntities) {
-        deleteByAnchorIdIn(anchorEntities.stream().map(AnchorEntity::getId).mapToLong(id -> id).toArray());
+        deleteByAnchorIdIn(anchorEntities.stream().map(AnchorEntity::getId).toList());
     }
 
     @Modifying
-    @Query(value = "DELETE FROM fragment WHERE anchor_id = :anchorId AND xpath = ANY (:xpaths)", nativeQuery = true)
-    void deleteByAnchorIdAndXpaths(@Param("anchorId") long anchorId, @Param("xpaths") String[] xpaths);
-
-    default void deleteByAnchorIdAndXpaths(final long anchorId, final Collection<String> xpaths) {
-        deleteByAnchorIdAndXpaths(anchorId, xpaths.toArray(new String[0]));
-    }
+    @Query(value = "DELETE FROM fragment WHERE anchor_id = :anchorId AND xpath IN (:xpaths)", nativeQuery = true)
+    void deleteByAnchorIdAndXpaths(@Param("anchorId") long anchorId, @Param("xpaths") Collection<String> xpaths);
 
     @Modifying
-    @Query(value = "DELETE FROM fragment f WHERE anchor_id = :anchorId AND xpath LIKE ANY (:xpathPatterns)",
+    @Query(value = "DELETE FROM fragment f WHERE anchor_id = :anchorId AND xpath LIKE :xpathPattern",
         nativeQuery = true)
-    void deleteByAnchorIdAndXpathLikeAny(@Param("anchorId") long anchorId,
-                                         @Param("xpathPatterns") String[] xpathPatterns);
+    void deleteByAnchorIdAndXpathLike(@Param("anchorId") long anchorId, @Param("xpathPattern") String xpathPattern);
 
-    default void deleteListsByAnchorIdAndXpaths(long anchorId, Collection<String> xpaths) {
-        deleteByAnchorIdAndXpathLikeAny(anchorId,
-                xpaths.stream().map(xpath -> EscapeUtils.escapeForSqlLike(xpath) + "[@%").toArray(String[]::new));
+    default void deleteListByAnchorIdAndXpath(final long anchorId, final String xpath) {
+        deleteByAnchorIdAndXpathLike(anchorId, EscapeUtils.escapeForSqlLike(xpath) + "[@%");
     }
 
-    @Query(value = "SELECT xpath FROM fragment WHERE anchor_id = :anchorId AND xpath = ANY (:xpaths)",
+    @Query(value = "SELECT xpath FROM fragment WHERE anchor_id = :anchorId AND xpath IN (:xpaths)",
         nativeQuery = true)
     List<String> findAllXpathByAnchorIdAndXpathIn(@Param("anchorId") long anchorId,
-                                                  @Param("xpaths") String[] xpaths);
+                                                  @Param("xpaths") Collection<String> xpaths);
 
     default List<String> findAllXpathByAnchorAndXpathIn(final AnchorEntity anchorEntity,
                                                         final Collection<String> xpaths) {
-        return findAllXpathByAnchorIdAndXpathIn(anchorEntity.getId(), xpaths.toArray(new String[0]));
+        return findAllXpathByAnchorIdAndXpathIn(anchorEntity.getId(), xpaths);
     }
 
     @Query(value = "SELECT EXISTS(SELECT 1 FROM fragment WHERE anchor_id = :anchorId"
diff --git a/cps-ri/src/main/java/org/onap/cps/ri/repository/ModuleReferenceRepositoryImpl.java b/cps-ri/src/main/java/org/onap/cps/ri/repository/ModuleReferenceRepositoryImpl.java
index c160fb1e38..702b5896c7 100644
--- a/cps-ri/src/main/java/org/onap/cps/ri/repository/ModuleReferenceRepositoryImpl.java
+++ b/cps-ri/src/main/java/org/onap/cps/ri/repository/ModuleReferenceRepositoryImpl.java
@@ -64,7 +64,7 @@ public class ModuleReferenceRepositoryImpl implements ModuleReferenceQuery {
         }
 
         final String tempTableName = tempTableCreator.createTemporaryTable(
-            "moduleReferencesToCheckTemp", sqlData, "module_name", "revision");
+            "moduleReferencesToCheckTemp", sqlData, List.of("module_name", "revision"));
 
         return identifyNewModuleReferencesForCmHandle(tempTableName);
     }
diff --git a/cps-ri/src/main/java/org/onap/cps/ri/repository/SchemaSetRepository.java b/cps-ri/src/main/java/org/onap/cps/ri/repository/SchemaSetRepository.java
index 9357a5c6a7..b455bc04c0 100644
--- a/cps-ri/src/main/java/org/onap/cps/ri/repository/SchemaSetRepository.java
+++ b/cps-ri/src/main/java/org/onap/cps/ri/repository/SchemaSetRepository.java
@@ -2,7 +2,7 @@
  *  ============LICENSE_START=======================================================
  *  Copyright (C) 2020 Pantheon.tech
  *  Modifications Copyright (C) 2022 TechMahindra Ltd.
- *  Modifications Copyright (C) 2023 Nordix Foundation
+ *  Modifications Copyright (C) 2023-2024 Nordix Foundation
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -61,10 +61,10 @@ public interface SchemaSetRepository extends JpaRepository<SchemaSetEntity, Inte
     }
 
     @Modifying
-    @Query(value = "DELETE FROM schema_set WHERE dataspace_id = :dataspaceId AND name = ANY (:schemaSetNames)",
+    @Query(value = "DELETE FROM schema_set WHERE dataspace_id = :dataspaceId AND name IN (:schemaSetNames)",
         nativeQuery = true)
     void deleteByDataspaceIdAndNameIn(@Param("dataspaceId") final int dataspaceId,
-                                      @Param("schemaSetNames") final String[] schemaSetNames);
+                                      @Param("schemaSetNames") final Collection<String> schemaSetNames);
 
     /**
      * Delete multiple schema sets in a given dataspace.
@@ -73,7 +73,7 @@ public interface SchemaSetRepository extends JpaRepository<SchemaSetEntity, Inte
      */
     default void deleteByDataspaceAndNameIn(final DataspaceEntity dataspaceEntity,
                                             final Collection<String> schemaSetNames) {
-        deleteByDataspaceIdAndNameIn(dataspaceEntity.getId(), schemaSetNames.toArray(new String[0]));
+        deleteByDataspaceIdAndNameIn(dataspaceEntity.getId(), schemaSetNames);
     }
 
 }
diff --git a/cps-ri/src/main/java/org/onap/cps/ri/repository/TempTableCreator.java b/cps-ri/src/main/java/org/onap/cps/ri/repository/TempTableCreator.java
index cc83ab7d94..25c1491502 100644
--- a/cps-ri/src/main/java/org/onap/cps/ri/repository/TempTableCreator.java
+++ b/cps-ri/src/main/java/org/onap/cps/ri/repository/TempTableCreator.java
@@ -1,6 +1,6 @@
 /*-
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2022-2023 Nordix Foundation.
+ *  Copyright (C) 2022-2024 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,10 +22,8 @@ package org.onap.cps.ri.repository;
 
 import jakarta.persistence.EntityManager;
 import jakarta.persistence.PersistenceContext;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashSet;
-import java.util.Iterator;
 import java.util.List;
 import java.util.UUID;
 import java.util.stream.Collectors;
@@ -54,7 +52,7 @@ public class TempTableCreator {
      */
     public String createTemporaryTable(final String prefix,
                                        final Collection<List<String>> sqlData,
-                                       final String... columnNames) {
+                                       final Collection<String> columnNames) {
         final String tempTableName = prefix + UUID.randomUUID().toString().replace("-", "");
         final StringBuilder sqlStringBuilder = new StringBuilder("CREATE TEMPORARY TABLE ");
         sqlStringBuilder.append(tempTableName);
@@ -65,29 +63,21 @@ public class TempTableCreator {
         return tempTableName;
     }
 
-    private static void defineColumns(final StringBuilder sqlStringBuilder, final String[] columnNames) {
-        sqlStringBuilder.append('(');
-        final Iterator<String> it = Arrays.stream(columnNames).iterator();
-        while (it.hasNext()) {
-            final String columnName = it.next();
-            sqlStringBuilder.append(" ");
-            sqlStringBuilder.append(columnName);
-            sqlStringBuilder.append(" varchar NOT NULL");
-            if (it.hasNext()) {
-                sqlStringBuilder.append(",");
-            }
-        }
-        sqlStringBuilder.append(")");
+    private static void defineColumns(final StringBuilder sqlStringBuilder, final Collection<String> columnNames) {
+        final String columns = columnNames.stream()
+                .map(columnName -> " " + columnName + " varchar NOT NULL")
+                .collect(Collectors.joining(","));
+        sqlStringBuilder.append('(').append(columns).append(')');
     }
 
     private static void insertData(final StringBuilder sqlStringBuilder,
                                    final String tempTableName,
-                                   final String[] columnNames,
+                                   final Collection<String> columnNames,
                                    final Collection<List<String>> sqlData) {
         final Collection<String> sqlInserts = new HashSet<>(sqlData.size());
         for (final Collection<String> rowValues : sqlData) {
             final Collection<String> escapedValues =
-                rowValues.stream().map(EscapeUtils::escapeForSqlStringLiteral).collect(Collectors.toList());
+                rowValues.stream().map(EscapeUtils::escapeForSqlStringLiteral).toList();
             sqlInserts.add("('" + String.join("','", escapedValues) + "')");
         }
         sqlStringBuilder.append("INSERT INTO ");
diff --git a/cps-ri/src/main/java/org/onap/cps/ri/repository/YangResourceRepository.java b/cps-ri/src/main/java/org/onap/cps/ri/repository/YangResourceRepository.java
index 9a11592310..831766cc9a 100644
--- a/cps-ri/src/main/java/org/onap/cps/ri/repository/YangResourceRepository.java
+++ b/cps-ri/src/main/java/org/onap/cps/ri/repository/YangResourceRepository.java
@@ -35,11 +35,7 @@ import org.springframework.stereotype.Repository;
 public interface YangResourceRepository extends JpaRepository<YangResourceEntity, Integer>,
     YangResourceNativeRepository, SchemaSetYangResourceRepository {
 
-    List<YangResourceEntity> findAllByChecksumIn(String[] checksums);
-
-    default List<YangResourceEntity> findAllByChecksumIn(final Collection<String> checksums) {
-        return findAllByChecksumIn(checksums.toArray(new String[0]));
-    }
+    List<YangResourceEntity> findAllByChecksumIn(Collection<String> checksums);
 
     @Query(value = """
             SELECT DISTINCT
diff --git a/cps-service/src/main/java/org/onap/cps/utils/YangParserHelper.java b/cps-service/src/main/java/org/onap/cps/utils/YangParserHelper.java
index 597164598a..a5865be657 100644
--- a/cps-service/src/main/java/org/onap/cps/utils/YangParserHelper.java
+++ b/cps-service/src/main/java/org/onap/cps/utils/YangParserHelper.java
@@ -29,6 +29,7 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Map;
 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.stream.XMLInputFactory;
@@ -181,12 +182,12 @@ public class YangParserHelper {
 
     private static Map<String, Object> getDataSchemaNodeAndIdentifiersByXpath(final String parentNodeXpath,
                                                                               final SchemaContext schemaContext) {
-        final String[] xpathNodeIdSequence = xpathToNodeIdSequence(parentNodeXpath);
+        final List<String> xpathNodeIdSequence = xpathToNodeIdSequence(parentNodeXpath);
         return findDataSchemaNodeAndIdentifiersByXpathNodeIdSequence(xpathNodeIdSequence, schemaContext.getChildNodes(),
                 new ArrayList<>());
     }
 
-    private static String[] xpathToNodeIdSequence(final String xpath) {
+    private static List<String> xpathToNodeIdSequence(final String xpath) {
         try {
             return CpsPathUtil.getXpathNodeIdSequence(xpath);
         } catch (final PathParsingException pathParsingException) {
@@ -196,17 +197,16 @@ public class YangParserHelper {
     }
 
     private static Map<String, Object> findDataSchemaNodeAndIdentifiersByXpathNodeIdSequence(
-            final String[] xpathNodeIdSequence,
+            final List<String> xpathNodeIdSequence,
             final Collection<? extends DataSchemaNode> dataSchemaNodes,
             final Collection<QName> dataSchemaNodeIdentifiers) {
-        final String currentXpathNodeId = xpathNodeIdSequence[0];
+        final String currentXpathNodeId = xpathNodeIdSequence.get(0);
         final DataSchemaNode currentDataSchemaNode = dataSchemaNodes.stream()
             .filter(dataSchemaNode -> currentXpathNodeId.equals(dataSchemaNode.getQName().getLocalName()))
             .findFirst().orElseThrow(() -> schemaNodeNotFoundException(currentXpathNodeId));
         dataSchemaNodeIdentifiers.add(currentDataSchemaNode.getQName());
-        if (xpathNodeIdSequence.length <= 1) {
-            final Map<String, Object> dataSchemaNodeAndIdentifiers =
-                    new HashMap<>();
+        if (xpathNodeIdSequence.size() <= 1) {
+            final Map<String, Object> dataSchemaNodeAndIdentifiers = new HashMap<>();
             dataSchemaNodeAndIdentifiers.put("dataSchemaNode", currentDataSchemaNode);
             dataSchemaNodeAndIdentifiers.put("dataSchemaNodeIdentifiers", dataSchemaNodeIdentifiers);
             return dataSchemaNodeAndIdentifiers;
@@ -217,13 +217,11 @@ public class YangParserHelper {
                     ((DataNodeContainer) currentDataSchemaNode).getChildNodes(),
                     dataSchemaNodeIdentifiers);
         }
-        throw schemaNodeNotFoundException(xpathNodeIdSequence[1]);
+        throw schemaNodeNotFoundException(xpathNodeIdSequence.get(1));
     }
 
-    private static String[] getNextLevelXpathNodeIdSequence(final String[] xpathNodeIdSequence) {
-        final String[] nextXpathNodeIdSequence = new String[xpathNodeIdSequence.length - 1];
-        System.arraycopy(xpathNodeIdSequence, 1, nextXpathNodeIdSequence, 0, nextXpathNodeIdSequence.length);
-        return nextXpathNodeIdSequence;
+    private static List<String> getNextLevelXpathNodeIdSequence(final List<String> xpathNodeIdSequence) {
+        return xpathNodeIdSequence.subList(1, xpathNodeIdSequence.size());
     }
 
     private static DataValidationException schemaNodeNotFoundException(final String schemaNodeIdentifier) {