CompositeNode.cs

Go to the documentation of this file.

// 
//  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;
using Deveel.Data.Serialization;
using Deveel.Data.Sql.Tables;

namespace Deveel.Data.Sql.Query {
    [Serializable]
    class CompositeNode : BranchQueryPlanNode {
        public CompositeNode(IQueryPlanNode left, IQueryPlanNode right, CompositeFunction compositeOp, bool allOp)
            : base(left, right) {
            CompositeFunction = compositeOp;
            All = allOp;
        }

        private CompositeNode(ObjectData data)
            : base(data) {
            CompositeFunction = (CompositeFunction) data.GetInt32("Function");
            All = data.GetBoolean("All");
        }

        public CompositeFunction CompositeFunction { get; private set; }

        public bool All { get; private set; }

        public override ITable Evaluate(IRequest context) {
            var leftResult = Left.Evaluate(context);
            var rightResult = Right.Evaluate(context);

            // Form the composite table
            return leftResult.Composite(rightResult, CompositeFunction, All);
        }

        protected override void GetData(SerializeData data) {
            data.SetValue("Function", (int)CompositeFunction);
            data.SetValue("All", All);
        }
    }
}