UserSessionExtensions.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.Sql.Tables;

namespace Deveel.Data.Sql.Query {
    static class UserSessionExtensions {
        public static ITableQueryInfo GetTableQueryInfo(this ISession session, ObjectName tableName, ObjectName alias) {
            var tableInfo = session.GetTableInfo(tableName);
            if (alias != null) {
                tableInfo = tableInfo.Alias(alias);
            }

            return new TableQueryInfo(session, tableInfo, tableName, alias);
        }

        public static IQueryPlanNode CreateQueryPlan(this ISession session, ObjectName tableName, ObjectName aliasedName) {
            string tableType = session.GetTableType(tableName);
            if (tableType.Equals(TableTypes.View))
                return new FetchViewNode(tableName, aliasedName);

            return new FetchTableNode(tableName, aliasedName);
        }

        #region TableQueryInfo

        class TableQueryInfo : ITableQueryInfo {
            public TableQueryInfo(ISession session, TableInfo tableInfo, ObjectName tableName, ObjectName aliasName) {
                Session = session;
                TableInfo = tableInfo;
                TableName = tableName;
                AliasName = aliasName;
            }

            public ISession Session { get; private set; }

            public TableInfo TableInfo { get; private set; }

            public ObjectName TableName { get; set; }

            public ObjectName AliasName { get; set; }

            public IQueryPlanNode QueryPlanNode {
                get { return Session.CreateQueryPlan(TableName, AliasName); }
            }
        }

        #endregion

    }
}