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CommandPathList.h

// -*- C++ -*-
/*****************************************************************************
 *
 *   |_|_|_  |_|_    |_    |_|_|_  |_                C O M M U N I C A T I O N
 * |_        |_  |_  |_  |_        |_                          N E T W O R K S
 * |_        |_  |_  |_  |_        |_                                C L A S S
 *   |_|_|_  |_    |_|_    |_|_|_  |_|_|_|_                      L I B R A R Y
 *
 * $Id: CommandPathList.h,v 1.3 2002/01/14 11:25:34 spee Exp $
 *
 * Class: CNPathList --- ...
 *
 *****************************************************************************
 * Copyright (C) 1992-2002   Communication Networks
 *                           Aachen University of Technology
 *                           D-52056 Aachen
 *                           Germany
 *                           Email: cncl-adm@comnets.rwth-aachen.de
 *****************************************************************************
 * This file is part of the CN class library. All files marked with
 * this header are free software; you can redistribute it and/or modify
 * it under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.  This library is
 * distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
 * License for more details.  You should have received a copy of the GNU
 * Library General Public License along with this library; if not, write
 * to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139,
 * USA.
 * 
 * As an exception to this rule you may use this template to generate
 * your own classes. This does not cause these classes to be covered by
 * the GNU Library General Public License. This exception does not
 * however invalidate any other reasons why the resulting program must be
 * covered by the GNU Library General Public License. 
 *****************************************************************************/

#ifndef __CNPathList_h
#define __CNPathList_h


class CNString;

#include <CNCL/DLList.h>                // Base class

extern CNClassDesc CN_PATHLIST; // Class CNPathList description

class CNPathList : public CNDLList
{
  public:       /***** Constructors ******************************************/
    CNPathList(void) : CNDLList() {}

    CNPathList(const CNString& pathList);
    
    CNPathList(const CNPathList& pathList);
    
    CNPathList(CNParam *) {}

    ~CNPathList(void);
    
  public:       /***** Public interface **************************************/
    void add(const CNString& path);
    void add_environment_list( const CNString& env_variable);

    bool has_valid_command_path(const CNString& filename,
                                CNString& command_path);

    void ensure_command_path(const CNString& path);
    bool has_entry(const CNString& path);

  private:      /***** Internal private members ******************************/

  public:       /****** Member functions required by CNCL *********************/
    // CNClass description
    virtual CNClassDesc class_desc() const      
    { return CN_PATHLIST; }
            
    virtual bool is_a(CNClassDesc desc) const   // Type checking
    { return desc == CN_PATHLIST ? TRUE : CNDLList::is_a(desc); }
        
    static CNPathList *cast_from_object(CNObject *obj) 
    {
#   ifdef NO_TYPE_CHECK
        return (CNPathList *)obj;
#   else
        return (CNPathList *)( !obj || obj->is_a(CN_PATHLIST)
               ? obj : fatal_type(obj->class_desc(), CN_PATHLIST) );
#   endif
    }
    
    //
    static CNObject *new_object(CNParam *param = NIL) 
    { return param ? new CNPathList(param) : new CNPathList; }
    
    // Print/debug output
    virtual void print(ostream &strm = cout) const;
    //
    virtual void dump (ostream &strm = cout) const;
};

ostream &operator << (ostream &strm, const CNPathList &obj);
ostream &operator << (ostream &strm, const CNPathList *obj);

#endif 

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