source: stable/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory-5.5.0/TypeSystem/Implementation/GetClassTypeReference.cs @ 11937

// 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
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// 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
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// DEALINGS IN THE SOFTWARE.

using System;
using System.Linq;
using System.Threading;

namespace ICSharpCode.NRefactory.TypeSystem.Implementation
{
  /// <summary>
  /// Type Reference used when the fully qualified type name is known.
  /// </summary>
  [Serializable]
  public sealed class GetClassTypeReference : ITypeReference, ISymbolReference, ISupportsInterning
  {
    readonly IAssemblyReference assembly;
    readonly FullTypeName fullTypeName;
    
    /// <summary>
    /// Creates a new GetClassTypeReference that searches a type definition.
    /// </summary>
    /// <param name="fullTypeName">The full name of the type.</param>
    /// <param name="assembly">A reference to the assembly containing this type.
    /// If this parameter is null, the GetClassTypeReference will search in all
    /// assemblies belonging to the compilation.
    /// </param>
    public GetClassTypeReference(FullTypeName fullTypeName, IAssemblyReference assembly = null)
    {
      this.fullTypeName = fullTypeName;
      this.assembly = assembly;
    }
    
    /// <summary>
    /// Creates a new GetClassTypeReference that searches a top-level type in all assemblies.
    /// </summary>
    /// <param name="namespaceName">The namespace name containing the type, e.g. "System.Collections.Generic".</param>
    /// <param name="name">The name of the type, e.g. "List".</param>
    /// <param name="typeParameterCount">The number of type parameters, (e.g. 1 for List&lt;T&gt;).</param>
    public GetClassTypeReference(string namespaceName, string name, int typeParameterCount = 0)
    {
      this.fullTypeName = new TopLevelTypeName(namespaceName, name, typeParameterCount);
    }
    
    /// <summary>
    /// Creates a new GetClassTypeReference that searches a top-level type in the specified assembly.
    /// </summary>
    /// <param name="assembly">A reference to the assembly containing this type.
    /// If this parameter is null, the GetClassTypeReference will search in all assemblies belonging to the ICompilation.</param>
    /// <param name="namespaceName">The namespace name containing the type, e.g. "System.Collections.Generic".</param>
    /// <param name="name">The name of the type, e.g. "List".</param>
    /// <param name="typeParameterCount">The number of type parameters, (e.g. 1 for List&lt;T&gt;).</param>
    public GetClassTypeReference(IAssemblyReference assembly, string namespaceName, string name, int typeParameterCount = 0)
    {
      this.assembly = assembly;
      this.fullTypeName = new TopLevelTypeName(namespaceName, name, typeParameterCount);
    }
    
    /// <summary>
    /// Gets the assembly reference.
    /// This property returns null if the GetClassTypeReference is searching in all assemblies
    /// of the compilation.
    /// </summary>
    public IAssemblyReference Assembly { get { return assembly; } }
    
    /// <summary>
    /// Gets the full name of the type this reference is searching for.
    /// </summary>
    public FullTypeName FullTypeName { get { return fullTypeName; } }
    
    [Obsolete("Use the FullTypeName property instead. GetClassTypeReference now supports nested types, where the Namespace/Name/TPC tripel isn't sufficient for identifying the type.")]
    public string Namespace { get { return fullTypeName.TopLevelTypeName.Namespace; } }
    [Obsolete("Use the FullTypeName property instead. GetClassTypeReference now supports nested types, where the Namespace/Name/TPC tripel isn't sufficient for identifying the type.")]
    public string Name { get { return fullTypeName.Name; } }
    [Obsolete("Use the FullTypeName property instead. GetClassTypeReference now supports nested types, where the Namespace/Name/TPC tripel isn't sufficient for identifying the type.")]
    public int TypeParameterCount { get { return fullTypeName.TypeParameterCount; } }

    IType ResolveInAllAssemblies(ITypeResolveContext context)
    {
      var compilation = context.Compilation;
      foreach (var asm in compilation.Assemblies) {
        IType type = asm.GetTypeDefinition(fullTypeName);
        if (type != null)
          return type;
      }
      return null;
    }

    public IType Resolve(ITypeResolveContext context)
    {
      if (context == null)
        throw new ArgumentNullException("context");
      
      IType type = null;
      if (assembly == null) {
        // No assembly specified: look in all assemblies, but prefer the current assembly
        if (context.CurrentAssembly != null) {
          type = context.CurrentAssembly.GetTypeDefinition(fullTypeName);
        }
        if (type == null) {
          type = ResolveInAllAssemblies(context);
        }
      } else {
        // Assembly specified: only look in the specified assembly.
        // But if that's not loaded in the compilation, allow fall back to other assemblies.
        // (the non-loaded assembly might be a facade containing type forwarders -
        //  for example, when referencing a portable library from a non-portable project)
        IAssembly asm = assembly.Resolve(context);
        if (asm != null) {
          type = asm.GetTypeDefinition(fullTypeName);
        } else {
          type = ResolveInAllAssemblies(context);
        }
      }
      return type ?? new UnknownType(fullTypeName);
    }
    
    ISymbol ISymbolReference.Resolve(ITypeResolveContext context)
    {
      var type = Resolve(context);
      if (type is ITypeDefinition)
        return (ISymbol)type;
      return null;
    }
    
    public override string ToString()
    {
      return fullTypeName.ToString() + (assembly != null ? ", " + assembly.ToString() : null);
    }
    
    int ISupportsInterning.GetHashCodeForInterning()
    {
      unchecked {
        return 33 * assembly.GetHashCode() + fullTypeName.GetHashCode();
      }
    }
    
    bool ISupportsInterning.EqualsForInterning(ISupportsInterning other)
    {
      GetClassTypeReference o = other as GetClassTypeReference;
      return o != null && assembly == o.assembly && fullTypeName == o.fullTypeName;
    }
  }
}