Configuration.h

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/*
 * Configuration.h
 *
 * Smalltalk like class library for C++
 * Application configuration holder. Header.
 *
 * Copyright (c) 2004 Milan Cermak, Petr Stepanek
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef __CONFIGURATION_H
#define __CONFIGURATION_H

#include <stlib/Object.h>

#include <stlib/Dictionary.h>
#include <stlib/Set.h>
#include <stlib/String.h>
#include <stlib/Stream.h>

namespace Tools {

class ConfigurationReader;

class Configuration : public Core::Object
{
  protected:
    Dictionary *bindings;
    static Dictionary *_instances;
    static ConfigurationReader *_reader;

  public:
    Configuration(void);
    Configuration(String *name);
    virtual ~Configuration(void);

    /* Instance creation protocol */
    static Object *namedAt(String *name, String *item);
    static Configuration *named(String *name);
    static Configuration *fromFile(String *filename);

    /* Class-accessing protocol */
    virtual String *className(void) const;
    static ConfigurationReader *configurationReader(void);
    static void configurationReader(ConfigurationReader *reader);
    static Dictionary *instances(void);

    /* Accessing protocol */
    virtual Object *at(String *key);
    virtual Object *at(const char *key);
    virtual Object *at(String *key, Object *ifAbsentValue);
    virtual Object *at(const char *key, const char *ifAbsentValue);
    virtual void put(String *key, Object *value);
    virtual Set *keys(void);

    /* Printing protocol */
    virtual void printOn(Stream *stream) const;

    /* Removing protocol */
    virtual Object *removeKey(String *key);

    /* Testing protocol */
    virtual bool includesKey(String *key);
    virtual bool isEmpty(void);

    /* Utilities protocol */
    static void reloadAll(void);
};

};

#endif /* __CONFIGURATION_H */

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