NetworkInputStream.cs

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// 
//  Copyright 2010-2014 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;
using System.Net.Sockets;

namespace Deveel.Data.Protocol {
    public class NetworkInputStream : Stream, IInputStream {
        public NetworkInputStream(Socket socket) {
            stream = new NISNetworkStream(socket);
        }

        private readonly NISNetworkStream stream;

        private class NISNetworkStream : NetworkStream {
            public NISNetworkStream(Socket socket)
                : base(socket, FileAccess.Read) {
            }

            public int Available {
                get { return (Socket.Connected ? Socket.Available : 0); }
            }

            public override int Read(byte[] buffer, int offset, int size) {
                if (!Socket.Connected)
                    return 0;

                return base.Read(buffer, offset, size);
            }
        }

        public int Available {
            get { return stream.Available; }
        }

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

        public override bool CanWrite {
            get { return false; }
        }

        public override long Seek(long offset, SeekOrigin origin) {
            throw new NotSupportedException();
        }

        public override void Flush() {
        }

        public override void SetLength(long value) {
            throw new NotSupportedException();
        }

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

        public override void Write(byte[] buffer, int offset, int count) {
            throw new NotSupportedException();
        }

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

        public override long Length {
            get { throw new NotSupportedException(); }
        }

        public override long Position {
            get { throw new NotSupportedException(); }
            set { throw new NotSupportedException(); }
        }
    }
}