FetchViewNode.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;
using Deveel.Data.Serialization;
using Deveel.Data.Sql.Tables;
using Deveel.Data.Sql.Views;

namespace Deveel.Data.Sql.Query {
    [Serializable]
    class FetchViewNode : IQueryPlanNode {
        public FetchViewNode(ObjectName viewName, ObjectName aliasName) {
            ViewName = viewName;
            AliasName = aliasName;
        }

        private FetchViewNode(ObjectData data) {
            ViewName = data.GetValue<ObjectName>("ViewName");
            AliasName = data.GetValue<ObjectName>("AliasName");
        }

        public ObjectName ViewName { get; private set; }

        public ObjectName AliasName { get; private set; }

        private IQueryPlanNode CreateChildNode(IRequest context) {
            return context.Query.GetViewQueryPlan(ViewName);
        }

        public ITable Evaluate(IRequest context) {
            IQueryPlanNode node = CreateChildNode(context);
            var t = node.Evaluate(context);

            return AliasName != null ? new ReferenceTable(t, AliasName) : t;
        }

        void ISerializable.GetData(SerializeData data) {
            data.SetValue("ViewName", ViewName);
            data.SetValue("AliasName", AliasName);
        }
    }
}