JarFileEntry.cs

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using System;
using System.Collections.Immutable;
using System.IO;
using System.IO.Compression;
 
namespace IKVM.CoreLib.Jar
{
 
    internal readonly struct JarFileEntry
    {
 
        readonly JarFile _jar;
        readonly ZipArchiveEntry _entry;
        readonly string _name;
        readonly int _versionFeature;
 
        public JarFileEntry(JarFile jar, ZipArchiveEntry entry, string name, int versionFeature)
        {
            _jar = jar ?? throw new ArgumentNullException(nameof(jar));
            _entry = entry ?? throw new ArgumentNullException(nameof(entry));
            _name = name ?? throw new ArgumentNullException(nameof(name));
            _versionFeature = versionFeature;
        }
 
        public readonly string Name => _name;
 
        public readonly int VersionFeature => _versionFeature;
 
        public readonly ImmutableDictionary<string, string> Attributes => _jar.Manifest is { } m && m.Attributes.TryGetValue(_entry.FullName, out var attr) ? attr : ImmutableDictionary<string, string>.Empty;
 
        public readonly Stream Open() => _entry.Open();
 
    }
 
}