/*
 * 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.kyuubi.engine.jdbc.schema

import java.sql.ResultSetMetaData

import scala.collection.mutable.ListBuffer

case class Schema(columns: List[Column])

object Schema {

  def apply(metadata: ResultSetMetaData): Schema = {
    val columnCount = metadata.getColumnCount
    val columns = ListBuffer[Column]()
    for (i <- 1 to columnCount) {
      val name = metadata.getColumnName(i)
      val typeName = metadata.getColumnTypeName(i)
      val sqlType = metadata.getColumnType(i)
      val precision = metadata.getPrecision(i)
      val scale = metadata.getScale(i)
      val label = metadata.getColumnLabel(i)
      val displaySize = metadata.getColumnDisplaySize(i)
      val column = Column(name, typeName, sqlType, precision, scale, label, displaySize)
      columns += column
    }
    Schema(columns.toList)
  }
}
