QueryOptionNode.cs :  » 2.6.4-mono-.net-core » System.Linq » System » Linq » C# / CSharp Open Source

#if NET_4_0
//
// QueryOptionNode.cs
//
// Author:
//       Jrmie "Garuma" Laval <jeremie.laval@gmail.com>
//
// Copyright (c) 2010 Jrmie "Garuma" Laval
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System;
using System.Threading;
using System.Collections.Generic;

namespace System.Linq{
  // The first four elements correspond to the public operator With*
  // Last CancellationToken parameter is used internally for ImplementerToken
  using OptionsList = Tuple<ParallelMergeOptions?, ParallelExecutionMode?, CancellationToken?, int, CancellationTokenSource>;

  internal class QueryOptionNode<T> : QueryChildNode<T, T>
  {

    public QueryOptionNode (QueryBaseNode<T> parent)
      : base (parent)
    {

    }

    internal virtual OptionsList GetOptions ()
    {
      return new OptionsList (null, null, null, -1, null);
    }

    internal override IList<IEnumerable<T>> GetEnumerables (QueryOptions options)
    {
      return Parent.GetEnumerables (options);
    }

    internal override IList<IEnumerable<KeyValuePair<long, T>>> GetOrderedEnumerables (QueryOptions options)
    {
      return Parent.GetOrderedEnumerables (options);
    }

    internal override IEnumerable<T> GetSequential ()
    {
      return Parent.GetSequential ();
    }

    public override void Visit (INodeVisitor visitor)
    {
      visitor.Visit<T> (this);
    }
  }

  internal class ParallelExecutionModeNode<T> : QueryOptionNode<T>
  {
    ParallelExecutionMode mode;

    internal ParallelExecutionModeNode (ParallelExecutionMode mode, QueryBaseNode<T> parent)
      : base (parent)
    {
      this.mode = mode;
    }

    internal override OptionsList GetOptions ()
    {
      return new OptionsList (null, mode, null, -1, null);
    }
  }


  internal class ParallelMergeOptionsNode<T> : QueryOptionNode<T>
  {
    ParallelMergeOptions opts;

    internal ParallelMergeOptionsNode (ParallelMergeOptions opts, QueryBaseNode<T> parent)
      : base (parent)
    {
      this.opts = opts;
    }

    internal override OptionsList GetOptions ()
    {
      return new OptionsList (opts, null, null, -1, null);
    }
  }


  internal class CancellationTokenNode<T> : QueryOptionNode<T>
  {
    CancellationToken token;

    internal CancellationTokenNode (CancellationToken token, QueryBaseNode<T> parent)
      : base (parent)
    {
      this.token = token;
    }

    internal override OptionsList GetOptions ()
    {
      return new OptionsList (null, null, token, -1, null);
    }
  }

  internal class DegreeOfParallelismNode<T> : QueryOptionNode<T>
  {
    int degreeParallelism;

    internal DegreeOfParallelismNode (int degreeParallelism, QueryBaseNode<T> parent)
      : base (parent)
    {
      this.degreeParallelism = degreeParallelism;
    }

    internal override OptionsList GetOptions ()
    {
      return new OptionsList (null, null, null, degreeParallelism, null);
    }
  }

  internal class ImplementerTokenNode<T> : QueryOptionNode<T>
  {
    CancellationTokenSource source;

    internal ImplementerTokenNode (CancellationTokenSource token, QueryBaseNode<T> parent)
      : base (parent)
    {
      this.source = token;
    }

    internal override OptionsList GetOptions ()
    {
      return new OptionsList (null, null, null, -1, source);
    }
  }
}
#endif