CollectionWrapper.cs

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using System;
using System.Collections.Generic;
 
using java.lang;
 
namespace java.util
{
 
    class CollectionWrapper<T> : IterableWrapper<T>, ICollection<T>
    {
 
        internal readonly Collection _collection;
 
        public CollectionWrapper(Collection collection) : base(collection)
        {
            _collection = collection ?? throw new ArgumentNullException(nameof(collection));
        }
 
        public int Count => _collection.size();
 
        public bool IsReadOnly => false;
 
        public void Add(T item) => _collection.add(item);
 
        public void Clear() => _collection.clear();
 
        public bool Contains(T item) => _collection.contains(item);
 
        public void CopyTo(T[] array, int arrayIndex)
        {
            foreach (var entry in this)
                array[arrayIndex++] = entry;
        }
 
        public bool Remove(T item) => _collection.remove(item);
 
    }
 
}