LoopControlStatement.cs

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// 
//  Copyright 2010-2015 Deveel
// 
//    Licensed 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.
//

using System;
using System.IO;

using Deveel.Data.Serialization;
using Deveel.Data.Sql.Expressions;

namespace Deveel.Data.Sql.Statements {
    [Serializable]
    public sealed class LoopControlStatement : SqlStatement, IPreparable {
        public LoopControlStatement(LoopControlType controlType) 
            : this(controlType, (SqlExpression) null) {
        }

        public LoopControlStatement(LoopControlType controlType, SqlExpression whenExpression) 
            : this(controlType, null, whenExpression) {
        }

        public LoopControlStatement(LoopControlType controlType, string label) 
            : this(controlType, label, null) {
        }

        public LoopControlStatement(LoopControlType controlType, string label, SqlExpression whenExpression) {
            Label = label;
            WhenExpression = whenExpression;
            ControlType = controlType;
        }

        private LoopControlStatement(ObjectData data) {
            Label = data.GetString("ControlType");
            ControlType = (LoopControlType) data.GetInt32("ControlType");
            WhenExpression = data.GetValue<SqlExpression>("WhenExpression");
        }

        public LoopControlType ControlType { get; private set; }

        public string Label { get; set; }

        public SqlExpression WhenExpression { get; set; }

        object IPreparable.Prepare(IExpressionPreparer preparer) {
            var label = Label;
            var whenExp = WhenExpression;
            if (whenExp != null)
                whenExp = whenExp.Prepare(preparer);

            return new LoopControlStatement(ControlType, label, whenExp);
        }

        protected override void ExecuteStatement(ExecutionContext context) {
            throw new NotImplementedException();
        }

        protected override void GetData(SerializeData data) {
            data.SetValue("Label", Label);
            data.SetValue("WhenExpression", WhenExpression);
            data.SetValue("ControlType", (int)ControlType);
        }
    }
}