multimapwdef.h

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/******************************************************************************
 *
 * multimapwdef.h - template multimapwithdefault: a template which extends
 *          multipmap with easy access operators to
 *          obtain entries which are not repeated, plus a few
 *          nice convenience methods
 *
 * $Id: multimapwdef.h 3786 2020-08-30 11:35:14Z scribe $
 *
 * Copyright 2002-2013 CrossWire Bible Society (http://www.crosswire.org)
 *  CrossWire Bible Society
 *  P. O. Box 2528
 *  Tempe, AZ  85280-2528
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation version 2.
 *
 * 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.
 *
 */

#ifndef MULTIMAPWDEF_H
#define MULTIMAPWDEF_H

#include <map>

SWORD_NAMESPACE_START

// multmap that still lets you use [] to reference FIRST
// entry of a key if multiples exist
template <class Key, class T, class Compare>
class multimapwithdefault : public std::multimap<Key, T, Compare> {
public:
    typedef std::pair<const Key, T> value_type;
    T& getWithDefault(const Key& k, const T& defaultValue) {
        if (find(k) == this->end()) {
            insert(value_type(k, defaultValue));
        }
        return (*(find(k))).second;
    }

    T& operator[](const Key& k) {
        if (this->find(k) == this->end()) {
            this->insert(value_type(k, T()));
        }
        return (*(this->find(k))).second;
    }
    bool has(const Key& k, const T &val) const {
        typename std::multimap<Key, T, Compare>::const_iterator start = this->lower_bound(k);
        typename std::multimap<Key, T, Compare>::const_iterator end = this->upper_bound(k);
        for (; start!=end; start++) {
            if (start->second == val)
                return true;
        }
        return false;
    }
};

SWORD_NAMESPACE_END
#endif