source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory-5.5.0/Analysis/TypeGraph.cs @ 11700

// Copyright (c) 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;
using System.Collections.Generic;
using ICSharpCode.NRefactory.TypeSystem;

namespace ICSharpCode.NRefactory.Analysis
{
  /// <summary>
  /// A graph where type definitions are nodes; and edges are given by inheritance.
  /// </summary>
  public class TypeGraph
  {
    Dictionary<AssemblyQualifiedTypeName, TypeGraphNode> dict;
    
    /// <summary>
    /// Builds a graph of all type definitions in the specified set of assemblies.
    /// </summary>
    /// <param name="assemblies">The input assemblies. The assemblies may belong to multiple compilations.</param>
    /// <remarks>The resulting graph may be cyclic if there are cyclic type definitions.</remarks>
    public TypeGraph(IEnumerable<IAssembly> assemblies)
    {
      if (assemblies == null)
        throw new ArgumentNullException("assemblies");
      dict = new Dictionary<AssemblyQualifiedTypeName, TypeGraphNode>();
      foreach (IAssembly assembly in assemblies) {
        foreach (ITypeDefinition typeDef in assembly.GetAllTypeDefinitions()) {
          // Overwrite previous entry - duplicates can occur if there are multiple versions of the
          // same project loaded in the solution (e.g. separate .csprojs for separate target frameworks)
          dict[new AssemblyQualifiedTypeName(typeDef)] = new TypeGraphNode(typeDef);
        }
      }
      foreach (IAssembly assembly in assemblies) {
        foreach (ITypeDefinition typeDef in assembly.GetAllTypeDefinitions()) {
          TypeGraphNode typeNode = dict[new AssemblyQualifiedTypeName(typeDef)];
          foreach (IType baseType in typeDef.DirectBaseTypes) {
            ITypeDefinition baseTypeDef = baseType.GetDefinition();
            if (baseTypeDef != null) {
              TypeGraphNode baseTypeNode;
              if (dict.TryGetValue(new AssemblyQualifiedTypeName(baseTypeDef), out baseTypeNode)) {
                typeNode.BaseTypes.Add(baseTypeNode);
                baseTypeNode.DerivedTypes.Add(typeNode);
              }
            }
          }
        }
      }
    }
    
    public TypeGraphNode GetNode(ITypeDefinition typeDefinition)
    {
      if (typeDefinition == null)
        return null;
      return GetNode(new AssemblyQualifiedTypeName(typeDefinition));
    }
    
    public TypeGraphNode GetNode(AssemblyQualifiedTypeName typeName)
    {
      TypeGraphNode node;
      if (dict.TryGetValue(typeName, out node))
        return node;
      else
        return null;
    }
  }
}