/*
 * 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.spark.sql.carbondata.execution.datasources.readsupport

import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions.{GenericInternalRow, UnsafeProjection}
import org.apache.spark.sql.types.StructType

import org.apache.carbondata.core.metadata.schema.table.CarbonTable
import org.apache.carbondata.core.metadata.schema.table.column.CarbonColumn
import org.apache.carbondata.hadoop.readsupport.CarbonReadSupport

/**
 * Read support class which converts carbon row array format to sparks Internal row.
 */
class SparkUnsafeRowReadSupport(requiredSchema: StructType) extends CarbonReadSupport[InternalRow] {
  private val unsafeProjection = UnsafeProjection.create(requiredSchema)
  override def initialize(carbonColumns: Array[CarbonColumn],
      carbonTable: CarbonTable): Unit = {
  }

  override def readRow(data: Array[AnyRef]): InternalRow = {
    unsafeProjection(new GenericInternalRow(data.asInstanceOf[Array[Any]]))
  }

  override def close(): Unit = {
    // Nothing to close
  }
}
