source: tags/3.3.13/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory-5.5.0/TypeSystem/Implementation/DefaultMemberReference.cs @ 18242

// 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
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using System;
using System.Collections.Generic;
using System.Linq;

namespace ICSharpCode.NRefactory.TypeSystem.Implementation
{
  /// <summary>
  /// References an entity by its type and name.
  /// This class can be used to refer to all members except for constructors and explicit interface implementations.
  /// </summary>
  /// <remarks>
  /// Resolving a DefaultMemberReference requires a context that provides enough information for resolving the declaring type reference
  /// and the parameter types references.
  /// </remarks>
  [Serializable]
  public sealed class DefaultMemberReference : IMemberReference, ISupportsInterning
  {
    readonly SymbolKind symbolKind;
    readonly ITypeReference typeReference;
    readonly string name;
    readonly int typeParameterCount;
    readonly IList<ITypeReference> parameterTypes;
    
    public DefaultMemberReference(SymbolKind symbolKind, ITypeReference typeReference, string name, int typeParameterCount = 0, IList<ITypeReference> parameterTypes = null)
    {
      if (typeReference == null)
        throw new ArgumentNullException("typeReference");
      if (name == null)
        throw new ArgumentNullException("name");
      if (typeParameterCount != 0 && symbolKind != SymbolKind.Method)
        throw new ArgumentException("Type parameter count > 0 is only supported for methods.");
      this.symbolKind = symbolKind;
      this.typeReference = typeReference;
      this.name = name;
      this.typeParameterCount = typeParameterCount;
      this.parameterTypes = parameterTypes ?? EmptyList<ITypeReference>.Instance;
    }
    
    public ITypeReference DeclaringTypeReference {
      get { return typeReference; }
    }
    
    public IMember Resolve(ITypeResolveContext context)
    {
      IType type = typeReference.Resolve(context);
      IEnumerable<IMember> members;
      if (symbolKind == SymbolKind.Accessor) {
        members = type.GetAccessors(
          m => m.Name == name && !m.IsExplicitInterfaceImplementation,
          GetMemberOptions.IgnoreInheritedMembers);
      } else if (symbolKind == SymbolKind.Method) {
        members = type.GetMethods(
          m => m.Name == name && m.SymbolKind == SymbolKind.Method
          && m.TypeParameters.Count == typeParameterCount && !m.IsExplicitInterfaceImplementation,
          GetMemberOptions.IgnoreInheritedMembers);
      } else {
        members = type.GetMembers(
          m => m.Name == name && m.SymbolKind == symbolKind && !m.IsExplicitInterfaceImplementation,
          GetMemberOptions.IgnoreInheritedMembers);
      }
      var resolvedParameterTypes = parameterTypes.Resolve(context);
      foreach (IMember member in members) {
        IParameterizedMember parameterizedMember = member as IParameterizedMember;
        if (parameterizedMember == null) {
          if (parameterTypes.Count == 0)
            return member;
        } else if (parameterTypes.Count == parameterizedMember.Parameters.Count) {
          bool signatureMatches = true;
          for (int i = 0; i < parameterTypes.Count; i++) {
            IType type1 = DummyTypeParameter.NormalizeAllTypeParameters(resolvedParameterTypes[i]);
            IType type2 = DummyTypeParameter.NormalizeAllTypeParameters(parameterizedMember.Parameters[i].Type);
            if (!type1.Equals(type2)) {
              signatureMatches = false;
              break;
            }
          }
          if (signatureMatches)
            return member;
        }
      }
      return null;
    }
    
    ISymbol ISymbolReference.Resolve(ITypeResolveContext context)
    {
      return ((IMemberReference)this).Resolve(context);
    }
    
    int ISupportsInterning.GetHashCodeForInterning()
    {
      return (int)symbolKind ^ typeReference.GetHashCode() ^ name.GetHashCode() ^ parameterTypes.GetHashCode();
    }
    
    bool ISupportsInterning.EqualsForInterning(ISupportsInterning other)
    {
      DefaultMemberReference o = other as DefaultMemberReference;
      return o != null && symbolKind == o.symbolKind && typeReference == o.typeReference && name == o.name && parameterTypes == o.parameterTypes;
    }
  }
}