/*
 * 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.iotdb.db.queryengine.transformation.dag.column.unary.scalar;

import org.apache.iotdb.db.queryengine.transformation.dag.column.ColumnTransformer;

import org.apache.tsfile.block.column.Column;
import org.apache.tsfile.block.column.ColumnBuilder;
import org.apache.tsfile.read.common.type.Type;
import org.apache.tsfile.read.common.type.TypeEnum;

import java.time.ZoneId;

public class CastFunctionColumnTransformer extends AbstractCastFunctionColumnTransformer {

  public CastFunctionColumnTransformer(
      Type returnType, ColumnTransformer childColumnTransformer, ZoneId zoneId) {
    super(returnType, childColumnTransformer, zoneId);
  }

  @Override
  protected void transform(
      Column column, ColumnBuilder columnBuilder, TypeEnum sourceType, Type childType, int i) {
    switch (sourceType) {
      case INT32:
        cast(columnBuilder, childType.getInt(column, i));
        break;
      case DATE:
        castDate(columnBuilder, childType.getInt(column, i));
        break;
      case INT64:
        cast(columnBuilder, childType.getLong(column, i));
        break;
      case TIMESTAMP:
        castTimestamp(columnBuilder, childType.getLong(column, i));
        break;
      case FLOAT:
        cast(columnBuilder, childType.getFloat(column, i));
        break;
      case DOUBLE:
        cast(columnBuilder, childType.getDouble(column, i));
        break;
      case BOOLEAN:
        cast(columnBuilder, childType.getBoolean(column, i));
        break;
      case TEXT:
      case STRING:
        castString(columnBuilder, childType.getBinary(column, i));
        break;
      case BLOB:
        castBlob(columnBuilder, childType.getBinary(column, i));
        break;
      default:
        throw new UnsupportedOperationException(
            String.format(
                "Unsupported source dataType: %s", childColumnTransformer.getType().getTypeEnum()));
    }
  }
}
