SequenceOfStatementsNode.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.Collections.Generic;
using System.Linq;

namespace Deveel.Data.Sql.Parser {
    class SequenceOfStatementsNode : SqlNode {
        private readonly ICollection<IStatementNode> statementNodes;

        internal SequenceOfStatementsNode() {
            statementNodes = new List<IStatementNode>();
        }

        public IEnumerable<IStatementNode> Statements {
            get { return statementNodes.AsEnumerable(); }
        }

        protected override ISqlNode OnChildNode(ISqlNode node) {
            ReadStatements(node.ChildNodes);
            return base.OnChildNode(node);
        }

        private void ReadStatements(IEnumerable<ISqlNode> nodes) {
            foreach (var node in nodes) {
                if (node is IStatementNode) {
                    statementNodes.Add(node as IStatementNode);
                } else {
                    ReadStatements(node.ChildNodes);
                }
            }
        }
    }
}