jp.co.yahoo.yosegi.spread.column.ArrowArrayColumn Maven / Gradle / Ivy

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/**
 * 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.
 */

package jp.co.yahoo.yosegi.spread.column;

import jp.co.yahoo.yosegi.message.design.ArrayContainerField;
import jp.co.yahoo.yosegi.message.design.IField;
import jp.co.yahoo.yosegi.message.design.NullField;
import jp.co.yahoo.yosegi.message.objects.PrimitiveObject;
import jp.co.yahoo.yosegi.spread.Spread;
import jp.co.yahoo.yosegi.spread.column.filter.IFilter;
import org.apache.arrow.vector.FieldVector;
import org.apache.arrow.vector.complex.ListVector;

import java.io.IOException;
import java.io.UncheckedIOException;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class ArrowArrayColumn implements IColumn {

  private final String columnName;
  private final Spread spread;
  private final ICell[] cellArray;

  private ICell defaultCell = ArrayColumn.EmptyArrayCell.getInstance();
  private IColumn parentColumn = NullColumn.getInstance();

  /**
   * Initialize by setting column name and Arrow vector.
   */
  public ArrowArrayColumn( final String columnName , final ListVector vector ) {
    this.columnName = columnName;

    FieldVector childVector = vector. getDataVector();
    spread = new Spread();
    spread.addColumn(
        ArrowColumnFactory.convert( childVector.getField().getName() , childVector ) );
    spread.setRowCount( vector.getInnerValueCount() );

    cellArray = new ICell[vector.getValueCount()];
    int currentStart = 0;
    for ( int i = 0 ; i < cellArray.length ; i++ ) {
      if ( vector.isNull(i) ) {
        cellArray[i] = defaultCell;
      } else {
        int length = vector.  getInnerValueCountAt(i);
        cellArray[i] = new ArrayCell(
            new SpreadArrayLink( spread , i , currentStart , currentStart + length ) );
        currentStart += length;
      }
    }
  }

  @Override
  public void setColumnName( final String columnName ) {
    throw new UnsupportedOperationException( "This column is read only." );
  }

  @Override
  public String getColumnName() {
    return columnName;
  }

  @Override
  public ColumnType getColumnType() {
    return ColumnType.ARRAY;
  }

  @Override
  public void setParentsColumn( final IColumn column ) {
    this.parentColumn = parentColumn;
  }

  @Override
  public IColumn getParentsColumn() {
    return parentColumn;
  }

  @Override
  public int add(
      final ColumnType type , final Object obj , final int index ) throws IOException {
    throw new UnsupportedOperationException( "This column is read only." );
  }

  @Override
  public void addCell(
      final ColumnType type , final ICell obj , final int index ) throws IOException {
    throw new UnsupportedOperationException( "This column is read only." );
  }

  @Override
  public ICellManager getCellManager() {
    throw new UnsupportedOperationException( "This column is read only." );
  }

  @Override
  public void setCellManager( final ICellManager cellManager ) {
    throw new UnsupportedOperationException( "This column is read only." );
  }

  @Override
  public ICell get( final int index ) {
    return cellArray[index];
  }

  @Override
  public List getColumnKeys() {
    return new ArrayList();
  }

  @Override
  public int getColumnSize() {
    return spread.getColumnSize();
  }

  @Override
  public List getListColumn() {
    return spread.getListColumn();
  }

  @Override
  public IColumn getColumn( final int index ) {
    if ( index != 0 ) {
      return NullColumn.getInstance();
    }
    return spread.getColumn( 0 );
  }

  @Override
  public IColumn getColumn( final String columnName ) {
    return NullColumn.getInstance();
  }

  @Override
  public IColumn getColumn( final ColumnType type ) {
    return NullColumn.getInstance();
  }

  @Override
  public void setDefaultCell( final ICell defaultCell ) {
    this.defaultCell = defaultCell;
  }

  @Override
  public int size() {
    return cellArray.length;
  }

  @Override
  public IField getSchema() throws IOException {
    return getSchema( getColumnName() );
  }

  @Override
  public IField getSchema( final String schemaName ) throws IOException {
    IField childSchema = spread.getColumn(0).getSchema();
    if ( childSchema == null ) {
      childSchema = new NullField( "dummy" );
    }
    return new ArrayContainerField( schemaName , childSchema );
  }

  @Override
  public String toString() {
    StringBuffer result = new StringBuffer();
    result.append( String.format( "Column name : %s\n" , getColumnName() ) );
    result.append( String.format( "Column type : %s<" , getColumnType() ) );
    result.append( IntStream.range( 0 , spread.getColumnSize() )
        .mapToObj( i -> spread.getColumn(i).getColumnType().toString() )
        .collect( Collectors.joining( "," ) ) );
    result.append( ">\n" );
    result.append( "--------------------------\n" );
    IntStream.range( 0 , size() )
        .forEach( i -> {
          result.append( String.format( "CELL-%d: %s\n" , i , get( i ).toString() ) );
        } );

    return result.toString();
  }

}