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// Copyright (c) Dr. Dirk Lellinger. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
using System.Text;
using SlobViewer.Common;
namespace SlobViewer.Slob
{
/// <summary>
/// Part of a <see cref="SlobDictionaryInMemory"/>. A <see cref="StoreItemInMemory"/> holds multiple dictionary values. After reading the SLOB file,
/// the content is stored in compressed form. If the contents is accessed, it is decompressed.
/// </summary>
public class StoreItemInMemory : StoreItemBase
{
/// <summary>
/// Initializes a new instance of the <see cref="StoreItemInMemory"/> class.
/// </summary>
/// <param name="contentIds">The array of content IDs.</param>
/// <param name="compressedContent">Compressed content as retrieved from the SLOB file.</param>
public StoreItemInMemory(byte[] contentIds, byte[] compressedContent)
{
_contentIds = contentIds;
_compressedContent = compressedContent;
}
/// <summary>
/// Get the content item with index <paramref name="idx"/>.
/// </summary>
/// <param name="idx">The index.</param>
/// <returns>A tuple, consisting of the content and content id at index <paramref name="idx"/>.</returns>
public (string Content, int ContentId) GetAt(int idx, Encoding encoding, string compression, byte[] buffer)
{
if (null != _compressedContent)
{
DecompressContent(encoding, compression, buffer);
_compressedContent = null;
}
return (_content[idx], _contentIds[idx]);
}
}
}
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