/*
* TclObj.java
*
* Copyright (c) 1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and
* redistribution of this file, and for a DISCLAIMER OF ALL
* WARRANTIES.
* 
* Included in SQLite3 port to C# for use in testharness only;  2008 Noah B Hart
*
* RCS @(#) $Id: TclObj.java,v 1.5 2000/10/29 06:00:42 mdejong Exp $
*
*/
using System;
namespace tcl.lang
{

  /// <summary> This class implements the object type in Tcl.</summary>

  public class TclObj : InternalRep
  {
    /// <summary> Internal representation of a object value.</summary>
    private object value;

    /// <summary> Construct a TclObj representation with the given object value.</summary>
    private TclObj( object o )
    {
      value = o;
    }

    /// <summary> Returns a dupilcate of the current object.</summary>
    /// <param name="obj">the TclObject that contains this internalRep.
    /// </param>
    public InternalRep duplicate()
    {
      return new TclObj( value );
    }

    /// <summary> Implement this no-op for the InternalRep interface.</summary>

    public void dispose()
    {
      value = null;
    }

    /// <summary> Called to query the string representation of the Tcl object. This
    /// method is called only by TclObject.toString() when
    /// TclObject.stringRep is null.
    /// 
    /// </summary>
    /// <returns> the string representation of the Tcl object.
    /// </returns>
    public override string ToString()
    {
      return value.ToString();
    }

    /// <summary> Tcl_NewIntObj -> TclObj.newInstance
    /// 
    /// Creates a new instance of a TclObject with a TclObj internal
    /// representation.
    /// 
    /// </summary>
    /// <param name="b">initial value of the object object.
    /// </param>
    /// <returns> the TclObject with the given object value.
    /// </returns>

    public static TclObject newInstance( object o )
    {
      return new TclObject( new TclObj( o ) );
    }


    /// <summary> Changes the object value of the object.
    /// 
    /// </summary>
    /// <param name="interp">current interpreter.
    /// </param>
    /// <param name="tobj">the object to operate on.
    /// @paran i the new object value.
    /// </param>
    public static void set( TclObject tobj, object o )
    {
      tobj.invalidateStringRep();
      InternalRep rep = tobj.InternalRep;
      TclObj tint;

      if ( rep is TclObj )
      {
        tint = (TclObj)rep;
        tint.value = o;
      }
      else
      {
        tobj.InternalRep = new TclObj( o );
      }
    }
  }
}