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Prowlarr/Migrator.net/Migrator.Providers/ColumnPropertiesMapper.cs

120 lines
3.6 KiB

using System;
using System.Collections.Generic;
using Migrator.Framework;
namespace Migrator.Providers
{
/// <summary>
/// This is basically a just a helper base class
/// per-database implementors may want to override ColumnSql
/// </summary>
public class ColumnPropertiesMapper
{
protected Dialect dialect;
/// <summary>The SQL type</summary>
protected string type;
/// <summary>The name of the column</summary>
protected string name;
/// <summary>
/// the type of the column
/// </summary>
protected string columnSql;
/// <summary>
/// Sql if This column is Indexed
/// </summary>
protected bool indexed = false;
/// <summary>
/// Sql if this column has a default value
/// </summary>
protected object defaultVal;
public ColumnPropertiesMapper(Dialect dialect, string type)
{
this.dialect = dialect;
this.type = type;
}
/// <summary>
/// The sql for this column, override in database-specific implementation classes
/// </summary>
public virtual string ColumnSql
{
get { return columnSql; }
}
public string Name
{
get { return name; }
set { name = value; }
}
public object Default
{
get { return defaultVal; }
set { defaultVal = value; }
}
public string QuotedName
{
get { return dialect.Quote(Name); }
}
public string IndexSql
{
get
{
if (dialect.SupportsIndex && indexed)
return String.Format("INDEX({0})", dialect.Quote(name));
return null;
}
}
public void MapColumnProperties(Column column)
{
Name = column.Name;
indexed = PropertySelected(column.ColumnProperty, ColumnProperty.Indexed);
List<string> vals = new List<string>();
vals.Add(dialect.ColumnNameNeedsQuote ? QuotedName : Name);
vals.Add(type);
if (! dialect.IdentityNeedsType)
AddValueIfSelected(column, ColumnProperty.Identity, vals);
AddValueIfSelected(column, ColumnProperty.Unsigned, vals);
if (! PropertySelected(column.ColumnProperty, ColumnProperty.PrimaryKey) || dialect.NeedsNotNullForIdentity)
AddValueIfSelected(column, ColumnProperty.NotNull, vals);
AddValueIfSelected(column, ColumnProperty.PrimaryKey, vals);
if (dialect.IdentityNeedsType)
AddValueIfSelected(column, ColumnProperty.Identity, vals);
AddValueIfSelected(column, ColumnProperty.Unique, vals);
AddValueIfSelected(column, ColumnProperty.ForeignKey, vals);
if (column.DefaultValue != null)
vals.Add(dialect.Default(column.DefaultValue));
columnSql = String.Join(" ", vals.ToArray());
}
private void AddValueIfSelected(Column column, ColumnProperty property, ICollection<string> vals)
{
if (PropertySelected(column.ColumnProperty, property))
vals.Add(dialect.SqlForProperty(property));
}
public static bool PropertySelected(ColumnProperty source, ColumnProperty comparison)
{
return (source & comparison) == comparison;
}
}
}