jp.co.yahoo.yosegi.spread.column.ArrowStringConnector 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.objects.BytesStringObj;
import jp.co.yahoo.yosegi.message.objects.PrimitiveObject;
import jp.co.yahoo.yosegi.spread.column.filter.IFilter;
import org.apache.arrow.vector.VarCharVector;

import java.io.IOException;

public class ArrowStringConnector implements IArrowPrimitiveConnector {

  private final String columnName;
  private final VarCharVector vector;

  public ArrowStringConnector( final String columnName , final VarCharVector vector ) {
    this.columnName = columnName;
    this.vector = vector;
  }

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

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

  @Override
  public void add( final ICell cell , final int index ) {
    throw new UnsupportedOperationException( "This column is read only." );
  }

  @Override
  public ICell get( final int index , final ICell defaultCell ) {
    if ( vector.isNull( index ) ) {
      return defaultCell;
    }
    return new StringCell( new BytesStringObj( vector.get( index ) ) );
  }

  @Override
  public int size() {
    return vector.getValueCount();
  }

  @Override
  public void clear() {
    vector.clear();
  }

}