content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.
   */
  
  import org.apache.arrow.vector.complex.StructVector;
  import org.apache.arrow.vector.complex.impl.NullableStructWriterFactory;
  import org.apache.arrow.vector.types.Types;
  
  <@pp.dropOutputFile />
  <@pp.changeOutputFile name="/org/apache/arrow/vector/complex/impl/DenseUnionWriter.java" />
  
  
  <#include "/@includes/license.ftl" />
  
          package org.apache.arrow.vector.complex.impl;
  
  <#include "/@includes/vv_imports.ftl" />
          import org.apache.arrow.vector.complex.writer.BaseWriter;
          import org.apache.arrow.vector.types.Types.MinorType;
  
  /*
   * This class is generated using freemarker and the ${.template_name} template.
   */
  @SuppressWarnings("unused")
  public class DenseUnionWriter extends AbstractFieldWriter implements FieldWriter {
  
    DenseUnionVector data;
  
    private BaseWriter[] writers = new BaseWriter[Byte.MAX_VALUE + 1];
    private final NullableStructWriterFactory nullableStructWriterFactory;
  
    public DenseUnionWriter(DenseUnionVector vector) {
      this(vector, NullableStructWriterFactory.getNullableStructWriterFactoryInstance());
    }
  
    public DenseUnionWriter(DenseUnionVector vector, NullableStructWriterFactory nullableStructWriterFactory) {
      data = vector;
      this.nullableStructWriterFactory = nullableStructWriterFactory;
    }
  
    @Override
    public void setPosition(int index) {
      super.setPosition(index);
      for (BaseWriter writer : writers) {
        writer.setPosition(index);
      }
    }
  
    @Override
    public void start() {
      byte typeId = data.getTypeId(idx());
      getStructWriter((byte) idx()).start();
    }
  
    @Override
    public void end() {
      byte typeId = data.getTypeId(idx());
      getStructWriter(typeId).end();
    }
  
    @Override
    public void startList() {
      byte typeId = data.getTypeId(idx());
      getListWriter(typeId).startList();
    }
  
    @Override
    public void endList() {
      byte typeId = data.getTypeId(idx());
      getListWriter(typeId).endList();
    }
  
    @Override
    public void startListView() {
      byte typeId = data.getTypeId(idx());
      getListViewWriter(typeId).startList();
    }
  
    @Override
    public void endListView() {
      byte typeId = data.getTypeId(idx());
      getListViewWriter(typeId).endList();
    }
  
    private StructWriter getStructWriter(byte typeId) {
      StructWriter structWriter = (StructWriter) writers[typeId];
      if (structWriter == null) {
        structWriter = nullableStructWriterFactory.build((StructVector) data.getVectorByType(typeId));
        writers[typeId] = structWriter;
      }
      return structWriter;
    }
  
    public StructWriter asStruct(byte typeId) {
      data.setTypeId(idx(), typeId);
      return getStructWriter(typeId);
    }
  
    private ListWriter getListWriter(byte typeId) {
      ListWriter listWriter = (ListWriter) writers[typeId];
      if (listWriter == null) {
        listWriter = new UnionListWriter((ListVector) data.getVectorByType(typeId), nullableStructWriterFactory);
        writers[typeId] = listWriter;
      }
      return listWriter;
    }
  
    private ListWriter getListViewWriter(byte typeId) {
      ListWriter listWriter = (ListWriter) writers[typeId];
      if (listWriter == null) {
        listWriter = new UnionListViewWriter((ListViewVector) data.getVectorByType(typeId), nullableStructWriterFactory);
        writers[typeId] = listWriter;
      }
      return listWriter;
    }
  
    public ListWriter asList(byte typeId) {
      data.setTypeId(idx(), typeId);
      return getListWriter(typeId);
    }
  
    private MapWriter getMapWriter(byte typeId) {
      MapWriter mapWriter = (MapWriter) writers[typeId];
      if (mapWriter == null) {
        mapWriter = new UnionMapWriter((MapVector) data.getVectorByType(typeId));
        writers[typeId] = mapWriter;
      }
      return mapWriter;
    }
  
    public MapWriter asMap(byte typeId) {
      data.setTypeId(idx(), typeId);
      return getMapWriter(typeId);
    }
  
    BaseWriter getWriter(byte typeId) {
      MinorType minorType = data.getVectorByType(typeId).getMinorType();
      switch (minorType) {
        case STRUCT:
          return getStructWriter(typeId);
        case LIST:
          return getListWriter(typeId);
        case MAP:
          return getMapWriter(typeId);
      <#list vv.types as type>
        <#list type.minor as minor>
          <#assign name = minor.class?cap_first />
          <#assign fields = minor.fields!type.fields />
          <#assign uncappedName = name?uncap_first/>
          <#if !minor.typeParams?? || minor.class?starts_with("Decimal")>
        case ${name?upper_case}:
        return get${name}Writer(typeId);
          </#if>
        </#list>
      </#list>
        default:
          throw new UnsupportedOperationException("Unknown type: " + minorType);
      }
    }
    <#list vv.types as type>
      <#list type.minor as minor>
        <#assign name = minor.class?cap_first />
        <#assign fields = minor.fields!type.fields />
        <#assign uncappedName = name?uncap_first/>
        <#if !minor.typeParams?? || minor.class?starts_with("Decimal")>
  
    private ${name}Writer get${name}Writer(byte typeId) {
      ${name}Writer writer = (${name}Writer) writers[typeId];
      if (writer == null) {
        writer = new ${name}WriterImpl((${name}Vector) data.getVectorByType(typeId));
        writers[typeId] = writer;
      }
      return writer;
    }
  
    public ${name}Writer as${name}(byte typeId) {
      data.setTypeId(idx(), typeId);
      return get${name}Writer(typeId);
    }
  
    @Override
    public void write(${name}Holder holder) {
      throw new UnsupportedOperationException();
    }
  
    public void write${minor.class}(<#list fields as field>${field.type} ${field.name}<#if field_has_next>, </#if></#list>, byte typeId<#if minor.class?starts_with("Decimal")>, ArrowType arrowType</#if>) {
      data.setTypeId(idx(), typeId);
      get${name}Writer(typeId).setPosition(data.getOffset(idx()));
      get${name}Writer(typeId).write${name}(<#list fields as field>${field.name}<#if field_has_next>, </#if></#list><#if minor.class?starts_with("Decimal")>, arrowType</#if>);
    }
        </#if>
      </#list>
    </#list>
  
    public void writeNull() {
    }
  
    @Override
    public StructWriter struct() {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getListWriter(typeId).setPosition(data.getOffset(idx()));
      return getListWriter(typeId).struct();
    }
  
    @Override
    public ListWriter list() {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getListWriter(typeId).setPosition(data.getOffset(idx()));
      return getListWriter(typeId).list();
    }
  
    @Override
    public ListWriter list(String name) {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getStructWriter(typeId).setPosition(data.getOffset(idx()));
      return getStructWriter(typeId).list(name);
    }
  
    @Override
    public MapWriter map() {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getListWriter(typeId).setPosition(data.getOffset(idx()));
      return getMapWriter(typeId).map();
    }
  
    @Override
    public MapWriter map(String name) {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getStructWriter(typeId).setPosition(data.getOffset(idx()));
      return getStructWriter(typeId).map(name);
    }
  
    @Override
    public MapWriter map(String name, boolean keysSorted) {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getStructWriter(typeId).setPosition(data.getOffset(idx()));
      return getStructWriter(typeId).map(name, keysSorted);
    }
  
    @Override
    public StructWriter struct(String name) {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getStructWriter(typeId).setPosition(data.getOffset(idx()));
      return getStructWriter(typeId).struct(name);
    }
  
    <#list vv.types as type><#list type.minor as minor>
    <#assign lowerName = minor.class?uncap_first />
    <#if lowerName == "int" ><#assign lowerName = "integer" /></#if>
    <#assign upperName = minor.class?upper_case />
    <#assign capName = minor.class?cap_first />
    <#if !minor.typeParams?? || minor.class?starts_with("Decimal") >
    @Override
    public ${capName}Writer ${lowerName}(String name) {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getStructWriter(typeId).setPosition(data.getOffset(idx()));
      return getStructWriter(typeId).${lowerName}(name);
    }
  
    @Override
    public ${capName}Writer ${lowerName}() {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getListWriter(typeId).setPosition(data.getOffset(idx()));
      return getListWriter(typeId).${lowerName}();
    }
    </#if>
    <#if minor.class?starts_with("Decimal")>
    public ${capName}Writer ${lowerName}(String name<#list minor.typeParams as typeParam>, ${typeParam.type} ${typeParam.name}</#list>) {
      byte typeId = data.getTypeId(idx());
      data.setTypeId(idx(), typeId);
      getStructWriter(typeId).setPosition(data.getOffset(idx()));
      return getStructWriter(typeId).${lowerName}(name<#list minor.typeParams as typeParam>, ${typeParam.name}</#list>);
    }
    </#if>
    </#list></#list>
  
    @Override
    public void allocate() {
      data.allocateNew();
    }
  
    @Override
    public void clear() {
      data.clear();
    }
  
    @Override
    public void close() throws Exception {
      data.close();
    }
  
    @Override
    public Field getField() {
      return data.getField();
    }
  
    @Override
    public int getValueCapacity() {
      return data.getValueCapacity();
    }
  }
  