/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 IndexReader = Lucene.Net.Index.IndexReader;

namespace Lucene.Net.search
{
	
    [Serializable]
    public class SingleDocTestFilter : Lucene.Net.Search.Filter
    {
        private int doc;
		
        public SingleDocTestFilter(int doc)
        {
            this.doc = doc;
        }
		
        public override System.Collections.BitArray Bits(IndexReader reader)
        {
            System.Collections.BitArray bits = new System.Collections.BitArray((reader.MaxDoc() % 64 == 0 ? reader.MaxDoc() / 64 : reader.MaxDoc() / 64 + 1) * 64);

            for (int increment = 0; doc >= bits.Length; increment =+ 64)
            {
                bits.Length += increment;
            }
            bits.Set(doc, true);
            
            return bits;
        }
    }
}