Revision f3d080df trunk/Pithos.Core/NetworkGate.cs

b/trunk/Pithos.Core/NetworkGate.cs
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// -----------------------------------------------------------------------
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// <copyright file="NetworkGate.cs" company="GRNET">
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// Copyright 2011 GRNET S.A. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or
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// without modification, are permitted provided that the following
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// conditions are met:
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//
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//   1. Redistributions of source code must retain the above
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//      copyright notice, this list of conditions and the following
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//      disclaimer.
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//
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//   2. Redistributions in binary form must reproduce the above
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//      copyright notice, this list of conditions and the following
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//      disclaimer in the documentation and/or other materials
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//      provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// The views and conclusions contained in the software and
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// documentation are those of the authors and should not be
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// interpreted as representing official policies, either expressed
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// or implied, of GRNET S.A.
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// </copyright>
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// -----------------------------------------------------------------------
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using System;


  		





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using System.Collections.Concurrent;


  		





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using System.Collections.Generic;


  		





  ......




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    {


  		





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        None,


  		





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        Uploading,


  		





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        Downloading


  		





  
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        Downloading,


  		





  
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        Deleting,


  		





  
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        Renaming


  		





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    }


  		





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    //The NetworkGate prevents starting download/uploads for files that are already in the process of downloading,


  		





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            Contract.EndContractBlock();


  		





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            NetworkOperation operation;


  		





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            if (NetworkState.TryGetValue(path.ToLower(), out operation))


  		





  
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            var lower = path.ToLower();


  		





  
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            if (NetworkState.TryGetValue(lower, out operation))


  		





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                return operation;


  		





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            return NetworkOperation.None;


  		





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        }


  		





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                throw new ArgumentException("path must be a rooted path", "path");


  		





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            Contract.EndContractBlock();


  		





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            var state = GetNetworkState(path);


  		





  
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            var lower = path.ToLower();


  		





  
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            var state = GetNetworkState(lower);


  		





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            //If no operation is in progress, return a NetworkGate


  		





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            return (state == NetworkOperation.None)


  		





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                       ? new NetworkGate(path, operation)


  		





  
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                       ? new NetworkGate(lower, operation)


  		





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                   //otherwise return a gate with Fail flagged


  		





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                       : new NetworkGate(path, NetworkOperation.None);


  		





  
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                       : new NetworkGate(lower, NetworkOperation.None);


  		





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        }


  		





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