FileStream.cs

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// 
//  Copyright 2010-2015 Deveel
// 
//    Licensed 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.
//

using System;
using System.IO;

namespace Deveel.Data.Store {
    public sealed class FileStream : Stream {
        public IFile File { get; private set; }

        public FileStream(IFile file) {
            if (file == null)
                throw new ArgumentNullException("file");

            File = file;
        }

        public override void Flush() {
            File.Flush(true);
        }

        public override long Seek(long offset, SeekOrigin origin) {
            return File.Seek(offset, origin);
        }

        public override void SetLength(long value) {
            File.SetLength(value);
        }

        public override int Read(byte[] buffer, int offset, int count) {
            return File.Read(buffer, offset, count);
        }

        public override void Write(byte[] buffer, int offset, int count) {
            File.Write(buffer, offset, count);
        }

        public override bool CanRead {
            get { return true; }
        }

        public override bool CanSeek {
            get { return true; }
        }

        public override bool CanWrite {
            get { return !File.IsReadOnly; }
        }

        public override long Length {
            get { return File.Length; }
        }

        public override long Position {
            get { return File.Position; }
            set { Seek(value, SeekOrigin.Begin); }
        }

        protected override void Dispose(bool disposing) {
            File = null;
            base.Dispose(disposing);
        }
    }
}