source: branches/2389-EpsLexicase/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Ast/GeneralScope/UsingDeclaration.cs

// 
// UsingDeclaration.cs
//
// Author:
//       Mike Krüger <mkrueger@novell.com>
// 
// Copyright (c) 2009 Novell, Inc (http://www.novell.com)
// 
// 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.Linq;
using System.Text;
using System.Collections.Generic;

namespace ICSharpCode.NRefactory.CSharp
{
  /// <summary>
  /// using Import;
  /// </summary>
  public class UsingDeclaration : AstNode
  {
    public static readonly TokenRole UsingKeywordRole = new TokenRole ("using");
    public static readonly Role<AstType> ImportRole = new Role<AstType>("Import", AstType.Null);
    
    public override NodeType NodeType {
      get {
        return NodeType.Unknown;
      }
    }
    
    public CSharpTokenNode UsingToken {
      get { return GetChildByRole (UsingKeywordRole); }
    }
    
    public AstType Import {
      get { return GetChildByRole (ImportRole); }
      set { SetChildByRole (ImportRole, value); }
    }
    
    public string Namespace {
      get { return ConstructNamespace (Import); }
    }

    internal static string ConstructNamespace (AstType type)
    {
      var stack = new Stack<string>();
      while (type is MemberType) {
        var mt = (MemberType)type;
        stack.Push(mt.MemberName);
        type = mt.Target;
        if (mt.IsDoubleColon) {
          stack.Push("::");
        } else {
          stack.Push("."); 
        }
      }
      if (type is SimpleType)
        stack.Push(((SimpleType)type).Identifier);

      var result = new StringBuilder();
      while (stack.Count > 0)
        result.Append(stack.Pop());
      return result.ToString();
    }
    
    public CSharpTokenNode SemicolonToken {
      get { return GetChildByRole (Roles.Semicolon); }
    }
    
    public UsingDeclaration ()
    {
    }
    
    public UsingDeclaration (string nameSpace)
    {
      AddChild (AstType.Create (nameSpace), ImportRole);
    }
    
    public UsingDeclaration (AstType import)
    {
      AddChild (import, ImportRole);
    }
    
    public override void AcceptVisitor (IAstVisitor visitor)
    {
      visitor.VisitUsingDeclaration (this);
    }
      
    public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
    {
      return visitor.VisitUsingDeclaration (this);
    }
    
    public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
    {
      return visitor.VisitUsingDeclaration (this, data);
    }
    
    protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
    {
      UsingDeclaration o = other as UsingDeclaration;
      return o != null && this.Import.DoMatch(o.Import, match);
    }
  }
}