ReferenceTable.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;

namespace Deveel.Data.Sql.Tables {
    class ReferenceTable : FilterTable, IRootTable {
        private readonly TableInfo tableInfo;

        public ReferenceTable(ITable parent, ObjectName tableName) 
            : this(parent, parent.TableInfo.Alias(tableName)) {
        }

        public ReferenceTable(ITable parent, TableInfo tableInfo)
            : base(parent) {
            TableName = tableInfo.TableName;
            this.tableInfo = tableInfo;
        }

        public ObjectName TableName { get; private set; }

        public override TableInfo TableInfo {
            get { return tableInfo; }
        }

        protected override int IndexOfColumn(ObjectName columnName) {
            var tableName = columnName.Parent;
            if (tableName != null && tableName.Equals(TableName))
                return TableInfo.IndexOfColumn(columnName.Name);

            return -1;
        }

        protected override ObjectName GetResolvedColumnName(int column) {
            return new ObjectName(TableName, tableInfo[column].ColumnName);
        }

        public bool TypeEquals(IRootTable other) {
            return other == this;
        }
    }
}