ExitStatementNode.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 Deveel.Data.Sql.Expressions;
using Deveel.Data.Sql.Statements;

namespace Deveel.Data.Sql.Parser {
    class ExitStatementNode : SqlStatementNode {
        public string Label { get; private set; }

        public IExpressionNode WhenExpression { get; private set; }

        protected override ISqlNode OnChildNode(ISqlNode node) {
            if (node.NodeName.Equals("label_opt")) {
                Label = node.FindNode<IdentifierNode>().Text;
            } else if (node.NodeName.Equals("when_opt")) {
                WhenExpression = node.FindNode<IExpressionNode>();
            }

            return base.OnChildNode(node);
        }

        protected override void BuildStatement(StatementBuilder builder) {
            SqlExpression exp = null;
            if (WhenExpression != null)
                exp = ExpressionBuilder.Build(WhenExpression);

            builder.Statements.Add(new LoopControlStatement(LoopControlType.Exit, Label, exp));
        }
    }
}