src/Lucene.Net.Core/Index/ReadOnlySegmentReader.cs

/* 
 * 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;

namespace Lucene.Net.Index
{
    
    public class ReadOnlySegmentReader:SegmentReader
    {
        
        internal static void  NoWrite()
        {
            throw new System.NotSupportedException("This IndexReader cannot make any changes to the index (it was opened with readOnly = true)");
        }
        
        protected internal override void  AcquireWriteLock()
        {
            NoWrite();
        }
        
        // Not synchronized
        public override bool IsDeleted(int n)
        {
            return deletedDocs != null && deletedDocs.Get(n);
        }
    }
}