/*
 * 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.flink.table.data;

import org.apache.flink.table.data.vector.ColumnVector;

/**
 * Columnar map to support access to vector column data.
 *
 * <p>Referenced from flink 1.14.0 {@code org.apache.flink.table.data.ColumnarMapData}.
 */
public final class ColumnarMapData implements MapData {

  private final ColumnVector keyColumnVector;
  private final ColumnVector valueColumnVector;
  private final int offset;
  private final int numElements;

  public ColumnarMapData(
      ColumnVector keyColumnVector,
      ColumnVector valueColumnVector,
      int offset,
      int numElements) {
    this.keyColumnVector = keyColumnVector;
    this.valueColumnVector = valueColumnVector;
    this.offset = offset;
    this.numElements = numElements;
  }

  @Override
  public int size() {
    return numElements;
  }

  @Override
  public ArrayData keyArray() {
    return new ColumnarArrayData(keyColumnVector, offset, numElements);
  }

  @Override
  public ArrayData valueArray() {
    return new ColumnarArrayData(valueColumnVector, offset, numElements);
  }

  @Override
  public boolean equals(Object o) {
    throw new UnsupportedOperationException(
        "ColumnarMapData do not support equals, please compare fields one by one!");
  }

  @Override
  public int hashCode() {
    throw new UnsupportedOperationException(
        "ColumnarMapData do not support hashCode, please hash fields one by one!");
  }
}
