SimpleRowEnumerator.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;
using System.Collections.Generic;

namespace Deveel.Data.Sql.Tables {
    public class SimpleRowEnumerator : IEnumerator<Row> {
        private readonly ITable source;
        private int index = -1;
        private int rowCount;

        public SimpleRowEnumerator(ITable source) {
            if (source == null)
                throw new ArgumentNullException("source");

            this.source = source;
            rowCount = source.RowCount;
        }

        public void Dispose() {
        }

        public bool MoveNext() {
            return ++index < rowCount;
        }

        public void Reset() {
            rowCount = source.RowCount;
            index = -1;
        }

        public Row Current {
            get { return new Row(source, new RowId(source.TableInfo.Id, index)); }
        }

        object IEnumerator.Current {
            get { return Current; }
        }
    }
}