// bsn ModuleStore database versioning
// -----------------------------------
// 
// Copyright 2010 by Arsène von Wyss - avw@gmx.ch
// 
// Development has been supported by Sirius Technologies AG, Basel
// 
// Source:
// 
// https://bsn-modulestore.googlecode.com/hg/
// 
// License:
// 
// The library is distributed under the GNU Lesser General Public License:
// http://www.gnu.org/licenses/lgpl.html
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

using System;
using System.Diagnostics;

using bsn.ModuleStore.Sql.Script.Tokens;

namespace bsn.ModuleStore.Sql.Script {
	public abstract class AlterTableCheckConstraintStatementBase: AlterTableStatement {
		private readonly ConstraintName constraintName;
		private readonly TableCheck tableCheck;

		protected AlterTableCheckConstraintStatementBase(Qualified<SchemaName, TableName> tableName, TableCheckToken tableCheck, ConstraintName constraintName): base(tableName) {
			this.tableCheck = tableCheck.TableCheck;
			this.constraintName = constraintName;
		}

		public ConstraintName ConstraintName {
			get {
				return constraintName;
			}
		}

		public TableCheck TableCheck {
			get {
				return tableCheck;
			}
		}

		public override void WriteTo(SqlWriter writer) {
			base.WriteTo(writer);
			writer.WriteEnum(tableCheck, WhitespacePadding.SpaceAfter);
			WriteCheckOperation(writer);
			writer.WriteKeyword(" CONSTRAINT ");
			if (constraintName != null) {
				writer.WriteScript(constraintName, WhitespacePadding.None);
			} else {
				writer.WriteKeyword("ALL");
			}
		}

		protected abstract void WriteCheckOperation(SqlWriter writer);
	}
}
