| using System; |
| using System.Runtime.CompilerServices; |
| |
| 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> |
| /// Abstract base class for output to a file in a <see cref="Directory"/>. A random-access |
| /// output stream. Used for all Lucene index output operations. |
| /// |
| /// <para/><see cref="IndexOutput"/> may only be used from one thread, because it is not |
| /// thread safe (it keeps internal state like file position). |
| /// </summary> |
| /// <seealso cref="Directory"/> |
| /// <seealso cref="IndexInput"/> |
| public abstract class IndexOutput : DataOutput, IDisposable |
| { |
| /// <summary> |
| /// Forces any buffered output to be written. </summary> |
| [MethodImpl(MethodImplOptions.NoInlining)] |
| public abstract void Flush(); |
| |
| /// <summary> |
| /// Closes this stream to further operations. </summary> |
| // LUCENENET specific - implementing proper dispose pattern |
| public void Dispose() |
| { |
| Dispose(true); |
| GC.SuppressFinalize(this); |
| } |
| |
| /// <summary> |
| /// Closes this stream to further operations. </summary> |
| protected abstract void Dispose(bool disposing); |
| |
| /// <summary> |
| /// Returns the current position in this file, where the next write will |
| /// occur. </summary> |
| /// <seealso cref="Seek(long)"/> |
| public abstract long GetFilePointer(); // LUCENENET TODO: API - Make into property |
| |
| /// <summary> |
| /// Sets current position in this file, where the next write will occur. </summary> |
| /// <seealso cref="GetFilePointer()"/> |
| [Obsolete("(4.1) this method will be removed in Lucene 5.0")] |
| public abstract void Seek(long pos); |
| |
| /// <summary> |
| /// Returns the current checksum of bytes written so far </summary> |
| public abstract long Checksum { get; } |
| |
| /// <summary> |
| /// Gets or Sets the file length. By default, this property's setter does |
| /// nothing (it's optional for a <see cref="Directory"/> to implement |
| /// it). But, certain <see cref="Directory"/> implementations (for |
| /// example <see cref="FSDirectory"/>) can use this to inform the |
| /// underlying IO system to pre-allocate the file to the |
| /// specified size. If the length is longer than the |
| /// current file length, the bytes added to the file are |
| /// undefined. Otherwise the file is truncated.</summary> |
| public virtual long Length { get; set; } |
| } |
| } |