jp.co.yahoo.yosegi.inmemory.ArrowDictionaryByteLoader 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.inmemory;

import jp.co.yahoo.yosegi.message.objects.BytesObj;
import jp.co.yahoo.yosegi.message.objects.DoubleObj;
import jp.co.yahoo.yosegi.message.objects.FloatObj;
import jp.co.yahoo.yosegi.message.objects.IntegerObj;
import jp.co.yahoo.yosegi.message.objects.LongObj;
import jp.co.yahoo.yosegi.message.objects.PrimitiveObject;
import jp.co.yahoo.yosegi.message.objects.ShortObj;
import jp.co.yahoo.yosegi.message.objects.StringObj;

import org.apache.arrow.vector.TinyIntVector;
import org.apache.arrow.vector.ValueVector;

import java.io.IOException;

public class ArrowDictionaryByteLoader implements IDictionaryLoader {

  private final TinyIntVector vector;
  private final int loadSize;
  private byte[] dic;
  private boolean[] dicIsNullArray;

  /**
   * A loader that holds elements dictionary.
   */
  public ArrowDictionaryByteLoader( final ValueVector vector , final int loadSize ) {
    this.vector = (TinyIntVector)vector;
    this.vector.allocateNew( loadSize );
    this.vector.setValueCount( loadSize );
    this.loadSize = loadSize;
  }

  @Override
  public int getLoadSize() {
    return loadSize;
  }

  @Override
  public ValueVector build() throws IOException {
    return vector;
  }

  @Override
  public void finish() throws IOException {
  }

  @Override
  public void setNull( final int index ) throws IOException {
    vector.setNull( index );
  }

  @Override
  public void createDictionary( final int dictionarySize ) throws IOException {
    dic = new byte[dictionarySize];
    dicIsNullArray = new boolean[dictionarySize];
  }

  @Override
  public void setDictionaryIndex( final int index , final int dicIndex ) throws IOException {
    if ( dicIsNullArray[dicIndex] ) {
      setNull( index );
    } else {
      vector.setSafe( index , dic[dicIndex] );
    }
  }

  @Override
  public void setNullToDic( final int index ) throws IOException {
    dicIsNullArray[index] = true;
  }

  @Override
  public void setBytesToDic(int index, byte[] value, int start, int length) throws IOException {
    setDownCastOrNull( index , new BytesObj( value , start , length ) );
  }

  @Override
  public void setStringToDic(int index, String value) throws IOException {
    setDownCastOrNull( index , new StringObj( value ) );
  }

  @Override
  public void setByteToDic( final int index , final byte value ) throws IOException {
    dic[index] = value;
  }

  @Override
  public void setShortToDic( final int index , final short value ) throws IOException {
    setDownCastOrNull( index , new ShortObj( value ) );
  }

  @Override
  public void setIntegerToDic( final int index , final int value ) throws IOException {
    setDownCastOrNull( index , new IntegerObj( value ) );
  }

  @Override
  public void setLongToDic( final int index , final long value ) throws IOException {
    setDownCastOrNull( index , new LongObj( value ) );
  }

  @Override
  public void setFloatToDic( final int index , final float value ) throws IOException {
    setDownCastOrNull( index , new FloatObj( value ) );
  }

  @Override
  public void setDoubleToDic( final int index , final double value ) throws IOException {
    setDownCastOrNull( index , new DoubleObj( value ) );
  }

  private void setDownCastOrNull( final int index , final PrimitiveObject obj ) throws IOException {
    try {
      setByteToDic( index , obj.getByte() );
    } catch ( NumberFormatException ex ) {
      setNullToDic( index );
    }
  }

}