/*
 * 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.hudi.table.format.cow;

import org.apache.flink.table.data.DecimalData;
import org.apache.flink.table.data.vector.BytesColumnVector;
import org.apache.flink.table.data.vector.ColumnVector;
import org.apache.flink.table.data.vector.DecimalColumnVector;

/**
 * Parquet write decimal as int32 and int64 and binary, this class wrap the real vector to
 * provide {@link DecimalColumnVector} interface.
 *
 * <p>Reference Flink release 1.11.2 {@link org.apache.flink.formats.parquet.vector.ParquetDecimalVector}
 * because it is not public.
 */
public class ParquetDecimalVector implements DecimalColumnVector {

  private final ColumnVector vector;

  ParquetDecimalVector(ColumnVector vector) {
    this.vector = vector;
  }

  @Override
  public DecimalData getDecimal(int i, int precision, int scale) {
    return DecimalData.fromUnscaledBytes(
        ((BytesColumnVector) vector).getBytes(i).getBytes(),
        precision,
        scale);
  }

  @Override
  public boolean isNullAt(int i) {
    return vector.isNullAt(i);
  }
}

