code: /*
   * Copyright (c) 2022 Airbyte, Inc., all rights reserved.
   */
  
  package io.airbyte.integrations.destination.snowflake;
  
  import io.airbyte.integrations.destination.ExtendedNameTransformer;
  
  public class SnowflakeSQLNameTransformer extends ExtendedNameTransformer {
  
    @Override
    public String applyDefaultCase(final String input) {
      return input.toUpperCase();
    }
  
    /**
     * The first character can only be alphanumeric or an underscore.
     */
    @Override
    public String convertStreamName(final String input) {
      if (input == null) {
        return null;
      }
  
      final String normalizedName = super.convertStreamName(input);
      if (normalizedName.substring(0, 1).matches("[A-Za-z_]")) {
        return normalizedName;
      } else {
        return "_" + normalizedName;
      }
    }
  
  }
  