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.util.function.IntSupplier;
  import org.apache.arrow.driver.jdbc.accessor.ArrowFlightJdbcAccessor;
  import org.apache.arrow.driver.jdbc.accessor.ArrowFlightJdbcAccessorFactory;
  import org.apache.arrow.vector.Decimal256Vector;
  import org.apache.arrow.vector.DecimalVector;
  
  /** Accessor for {@link DecimalVector} and {@link Decimal256Vector}. */
  public class ArrowFlightJdbcDecimalVectorAccessor extends ArrowFlightJdbcAccessor {
  
    private final Getter getter;
  
    /** Functional interface used to unify Decimal*Vector#getObject implementations. */
    @FunctionalInterface
    interface Getter {
      BigDecimal getObject(int index);
    }
  
    public ArrowFlightJdbcDecimalVectorAccessor(
        DecimalVector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      super(currentRowSupplier, setCursorWasNull);
      this.getter = vector::getObject;
    }
  
    public ArrowFlightJdbcDecimalVectorAccessor(
        Decimal256Vector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      super(currentRowSupplier, setCursorWasNull);
      this.getter = vector::getObject;
    }
  
    @Override
    public Class<?> getObjectClass() {
      return BigDecimal.class;
    }
  
    @Override
    public BigDecimal getBigDecimal() {
      final BigDecimal value = getter.getObject(getCurrentRow());
      this.wasNull = value == null;
      this.wasNullConsumer.setWasNull(this.wasNull);
      return value;
    }
  
    @Override
    public String getString() {
      final BigDecimal value = this.getBigDecimal();
      return this.wasNull ? null : value.toString();
    }
  
    @Override
    public boolean getBoolean() {
      final BigDecimal value = this.getBigDecimal();
  
      return !this.wasNull && !value.equals(BigDecimal.ZERO);
    }
  
    @Override
    public byte getByte() {
      final BigDecimal value = this.getBigDecimal();
  
      return this.wasNull ? 0 : value.byteValue();
    }
  
    @Override
    public short getShort() {
      final BigDecimal value = this.getBigDecimal();
  
      return this.wasNull ? 0 : value.shortValue();
    }
  
    @Override
    public int getInt() {
      final BigDecimal value = this.getBigDecimal();
  
      return this.wasNull ? 0 : value.intValue();
    }
  
    @Override
    public long getLong() {
      final BigDecimal value = this.getBigDecimal();
  
      return this.wasNull ? 0 : value.longValue();
    }
  
    @Override
    public float getFloat() {
      final BigDecimal value = this.getBigDecimal();
  
      return this.wasNull ? 0 : value.floatValue();
    }
  
    @Override
    public double getDouble() {
      final BigDecimal value = this.getBigDecimal();
  
      return this.wasNull ? 0 : value.doubleValue();
    }
  
    @Override
    public BigDecimal getBigDecimal(int scale) {
      final BigDecimal value = this.getBigDecimal();
  
      return this.wasNull ? null : value.setScale(scale, RoundingMode.HALF_UP);
    }
  
    @Override
    public Object getObject() {
      return this.getBigDecimal();
    }
  }
  