ColumnType.php

<?php

declare (strict_types=1);
namespace Drupal\Core\Database\SchemaDefinition;


/**
 * Enumeration of cases for column type.
 *
 * It represents the generic data type of a table column. Most types just map
 * to the according database engine specific data types.
 */
enum ColumnType : string
{
  // String related types.
  case Char = 'char';
  case Varchar = 'varchar';
  // This is to indicate limiting the accepted characters in the column to the
  // US ASCII subset only.
  case VarcharAscii = 'varchar_ascii';
  case Text = 'text';
  // Number related types.
  case Int = 'int';
  // This is to indicate auto incrementing fields. For example, this will
  // expand to 'INT auto_increment' on MySQL.
  case Serial = 'serial';
  case Float = 'float';
  case Numeric = 'numeric';
  // Other types.
  case Blob = 'blob';
  
  /**
   * Checks if a default value is compatible with a column type.
   *
   * @return bool
   *   TRUE or FALSE.
   */
  public function isValidDefaultValue(StringValue|IntValue|FloatValue|NullValue $defaultValue) : bool {
    $allowed = match ($this) {  ColumnType::Char, ColumnType::Varchar, ColumnType::VarcharAscii, ColumnType::Text, ColumnType::Blob => [
        StringValue::class,
        NullValue::class,
      ],
      ColumnType::Int => [
        IntValue::class,
        NullValue::class,
      ],
      ColumnType::Serial => [],
      ColumnType::Float, ColumnType::Numeric => [
        FloatValue::class,
        NullValue::class,
      ],
    
    };
    return in_array(get_class($defaultValue), $allowed, TRUE);
  }
}