ModuleFinder.cs

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using System;
using System.Collections.Immutable;
 
namespace IKVM.CoreLib.Modules
{
 
    internal abstract class ModuleFinder : IModuleFinder
    {
 
        public static IModuleFinder Empty => EmptyModuleFinder.Instance;
 
        public static IModuleFinder Create(ImmutableArray<string> entries)
        {
            if (entries.IsDefault)
                throw new ArgumentNullException(nameof(entries));
 
            if (entries.Length == 0)
                return EmptyModuleFinder.Instance;
            else
                return ModulePath.Create(entries);
        }
 
        public static IModuleFinder Compose(ImmutableArray<IModuleFinder> finders)
        {
            if (finders.Length == 0)
                return EmptyModuleFinder.Instance;
            else
                return new ComposableModuleFinder(finders);
        }
 
        public abstract ModuleReference? Find(string name);
 
        public abstract ImmutableHashSet<ModuleReference> FindAll();
 
    }
 
}