StringIndex.h

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/*
 * opencog/atomspace/StringIndex.h
 *
 * Copyright (C) 2008 Linas Vepstas <linasvepstas@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License v3 as
 * published by the Free Software Foundation and including the exceptions
 * at http://opencog.org/wiki/Licenses
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, write to:
 * Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _OPENCOG_STRINGINDEX_H
#define _OPENCOG_STRINGINDEX_H

#include <cstddef>
#include <map>

#include <opencog/atomspace/Handle.h>

namespace opencog
{
class StringIndex
{
    private:
        std::map<std::string, Atom*> idx;

    public:
        void insert(const std::string& str, Atom* a)
        {
            idx.insert(std::pair<std::string, Atom*>(str, a));
        }
        Atom* get(const std::string& str) const
        {
            std::map<std::string, Atom*>::const_iterator it;
            it = idx.find(str);
            if (it != idx.end()) return it->second;
            return NULL;
        }
        void remove(const std::string& str)
        {
            idx.erase(str);
        }
        size_t size(void) const
        {
            return idx.size();
        }
};

} //namespace opencog

#endif // _OPENCOG_STRINGINDEX_H