| using System.Collections.Generic; |
| |
| namespace Lucene.Net.Store |
| { |
| /* |
| * 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. |
| */ |
| |
| /// <summary> |
| /// Represents a file in RAM as a list of <see cref="T:byte[]"/> buffers. |
| /// <para/> |
| /// @lucene.internal |
| /// </summary> |
| public class RAMFile |
| { |
| protected List<byte[]> m_buffers = new List<byte[]>(); |
| internal long length; |
| internal RAMDirectory directory; |
| protected internal long m_sizeInBytes; |
| |
| /// <summary> |
| /// File used as buffer, in no <see cref="RAMDirectory"/> |
| /// </summary> |
| public RAMFile() |
| { |
| } |
| |
| public RAMFile(RAMDirectory directory) |
| { |
| this.directory = directory; |
| } |
| |
| /// <summary> |
| /// For non-stream access from thread that might be concurrent with writing |
| /// </summary> |
| public virtual long Length |
| { |
| get |
| { |
| lock (this) |
| { |
| return length; |
| } |
| } |
| set |
| { |
| lock (this) |
| { |
| this.length = value; |
| } |
| } |
| } |
| |
| protected internal byte[] AddBuffer(int size) |
| { |
| byte[] buffer = NewBuffer(size); |
| lock (this) |
| { |
| m_buffers.Add(buffer); |
| m_sizeInBytes += size; |
| } |
| |
| if (directory != null) |
| { |
| directory.m_sizeInBytes.AddAndGet(size); |
| } |
| return buffer; |
| } |
| |
| protected internal byte[] GetBuffer(int index) |
| { |
| lock (this) |
| { |
| return m_buffers[index]; |
| } |
| } |
| |
| protected internal int NumBuffers |
| { |
| get |
| { |
| lock (this) |
| { |
| return m_buffers.Count; |
| } |
| } |
| } |
| |
| /// <summary> |
| /// Expert: allocate a new buffer. |
| /// Subclasses can allocate differently. </summary> |
| /// <param name="size"> size of allocated buffer. </param> |
| /// <returns> allocated buffer. </returns> |
| protected virtual byte[] NewBuffer(int size) |
| { |
| return new byte[size]; |
| } |
| |
| public virtual long GetSizeInBytes() |
| { |
| lock (this) |
| { |
| return m_sizeInBytes; |
| } |
| } |
| } |
| } |