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.
   */
  package org.apache.arrow.driver.jdbc.accessor.impl.numeric;
  
  import java.math.BigDecimal;
  import java.math.RoundingMode;
  import java.sql.SQLException;
  import java.util.function.IntSupplier;
  import org.apache.arrow.driver.jdbc.accessor.ArrowFlightJdbcAccessor;
  import org.apache.arrow.driver.jdbc.accessor.ArrowFlightJdbcAccessorFactory;
  import org.apache.arrow.vector.Float8Vector;
  import org.apache.arrow.vector.holders.NullableFloat8Holder;
  
  /** Accessor for the Float8Vector. */
  public class ArrowFlightJdbcFloat8VectorAccessor extends ArrowFlightJdbcAccessor {
  
    private final Float8Vector vector;
    private final NullableFloat8Holder holder;
  
    /**
     * Instantiate a accessor for the {@link Float8Vector}.
     *
     * @param vector an instance of a Float8Vector.
     * @param currentRowSupplier the supplier to track the lines.
     * @param setCursorWasNull the consumer to set if value was null.
     */
    public ArrowFlightJdbcFloat8VectorAccessor(
        Float8Vector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      super(currentRowSupplier, setCursorWasNull);
      this.holder = new NullableFloat8Holder();
      this.vector = vector;
    }
  
    @Override
    public Class<?> getObjectClass() {
      return Double.class;
    }
  
    @Override
    public double getDouble() {
      vector.get(getCurrentRow(), holder);
  
      this.wasNull = holder.isSet == 0;
      this.wasNullConsumer.setWasNull(this.wasNull);
      if (this.wasNull) {
        return 0;
      }
  
      return holder.value;
    }
  
    @Override
    public Object getObject() {
      final double value = this.getDouble();
  
      return this.wasNull ? null : value;
    }
  
    @Override
    public String getString() {
      final double value = this.getDouble();
      return this.wasNull ? null : Double.toString(value);
    }
  
    @Override
    public boolean getBoolean() {
      return this.getDouble() != 0.0;
    }
  
    @Override
    public byte getByte() {
      return (byte) this.getDouble();
    }
  
    @Override
    public short getShort() {
      return (short) this.getDouble();
    }
  
    @Override
    public int getInt() {
      return (int) this.getDouble();
    }
  
    @Override
    public long getLong() {
      return (long) this.getDouble();
    }
  
    @Override
    public float getFloat() {
      return (float) this.getDouble();
    }
  
    @Override
    public BigDecimal getBigDecimal() throws SQLException {
      final double value = this.getDouble();
      if (Double.isInfinite(value) || Double.isNaN(value)) {
        throw new SQLException("BigDecimal doesn't support Infinite/NaN.");
      }
      return this.wasNull ? null : BigDecimal.valueOf(value);
    }
  
    @Override
    public BigDecimal getBigDecimal(int scale) throws SQLException {
      final double value = this.getDouble();
      if (Double.isInfinite(value) || Double.isNaN(value)) {
        throw new SQLException("BigDecimal doesn't support Infinite/NaN.");
      }
      return this.wasNull ? null : BigDecimal.valueOf(value).setScale(scale, RoundingMode.HALF_UP);
    }
  }
  