v1 writer

presto-iceberg/nb-configuration.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project-shared-configuration>
+    <!--
+This file contains additional configuration written by modules in the NetBeans IDE.
+The configuration is intended to be shared among all the users of project and
+therefore it is assumed to be part of version control checkout.
+Without this configuration present, some functionality in the IDE may be limited or fail altogether.
+-->
+    <properties xmlns="http://www.netbeans.org/ns/maven-properties-data/1">
+        <!--
+Properties that influence various parts of the IDE, especially code formatting and the like. 
+You can copy and paste the single properties, into the pom.xml file and the IDE will pick them up.
+That way multiple projects can share the same settings (useful for formatting rules for example).
+Any value defined here will override the pom.xml file value but is only applicable to the current project.
+-->
+        <netbeans.hint.jdkPlatform>JDK_11.0.19-amzn</netbeans.hint.jdkPlatform>
+    </properties>
+</project-shared-configuration>

presto-parquet/DefLevelWriterProvider.java

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+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.trino.parquet.writer.repdef;
+
+import com.google.common.collect.Iterables;
+import org.apache.parquet.column.values.ValuesWriter;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface DefLevelWriterProvider
+{
+    DefinitionLevelWriter getDefinitionLevelWriter(Optional<DefinitionLevelWriter> nestedWriter, ValuesWriter encoder);
+
+    interface DefinitionLevelWriter
+    {
+        ValuesCount writeDefinitionLevels(int positionsCount);
+
+        ValuesCount writeDefinitionLevels();
+    }
+
+    record ValuesCount(int totalValuesCount, int maxDefinitionLevelValuesCount)
+    {
+    }
+
+    static DefinitionLevelWriter getRootDefinitionLevelWriter(List<DefLevelWriterProvider> defLevelWriterProviders, ValuesWriter encoder)
+    {
+        // Constructs hierarchy of DefinitionLevelWriter from leaf to root
+        DefinitionLevelWriter rootDefinitionLevelWriter = Iterables.getLast(defLevelWriterProviders)
+                .getDefinitionLevelWriter(Optional.empty(), encoder);
+        for (int nestedLevel = defLevelWriterProviders.size() - 2; nestedLevel >= 0; nestedLevel--) {
+            DefinitionLevelWriter nestedWriter = rootDefinitionLevelWriter;
+            rootDefinitionLevelWriter = defLevelWriterProviders.get(nestedLevel)
+                    .getDefinitionLevelWriter(Optional.of(nestedWriter), encoder);
+        }
+        return rootDefinitionLevelWriter;
+    }
+}