source: trunk/sources/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory-5.5.0/TypeSystem/Implementation/DefaultAssemblyReference.cs @ 11807

// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
// 
// 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;

namespace ICSharpCode.NRefactory.TypeSystem.Implementation
{
  /// <summary>
  /// References an existing assembly by name.
  /// </summary>
  [Serializable]
  public sealed class DefaultAssemblyReference : IAssemblyReference, ISupportsInterning
  {
    public static readonly IAssemblyReference CurrentAssembly = new CurrentAssemblyReference();
    
    [Obsolete("The corlib is not always called 'mscorlib' (as returned by this property), but might be 'System.Runtime'.")]
    public static readonly IAssemblyReference Corlib = new DefaultAssemblyReference("mscorlib");
    
    readonly string shortName;
    
    public DefaultAssemblyReference(string assemblyName)
    {
      int pos = assemblyName != null ? assemblyName.IndexOf(',') : -1;
      if (pos >= 0)
        shortName = assemblyName.Substring(0, pos);
      else
        shortName = assemblyName;
    }
    
    public IAssembly Resolve(ITypeResolveContext context)
    {
      IAssembly current = context.CurrentAssembly;
      if (current != null && string.Equals(shortName, current.AssemblyName, StringComparison.OrdinalIgnoreCase))
        return current;
      foreach (IAssembly asm in context.Compilation.Assemblies) {
        if (string.Equals(shortName, asm.AssemblyName, StringComparison.OrdinalIgnoreCase))
          return asm;
      }
      return null;
    }
    
    public override string ToString()
    {
      return shortName;
    }
    
    int ISupportsInterning.GetHashCodeForInterning()
    {
      unchecked {
        return shortName.GetHashCode();
      }
    }
    
    bool ISupportsInterning.EqualsForInterning(ISupportsInterning other)
    {
      DefaultAssemblyReference o = other as DefaultAssemblyReference;
      return o != null && shortName == o.shortName;
    }
    
    [Serializable]
    sealed class CurrentAssemblyReference : IAssemblyReference
    {
      public IAssembly Resolve(ITypeResolveContext context)
      {
        IAssembly asm = context.CurrentAssembly;
        if (asm == null)
          throw new ArgumentException("A reference to the current assembly cannot be resolved in the compilation's global type resolve context.");
        return asm;
      }
    }
  }
}