AliasMap.h

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// -*- lsst-c++ -*-
#ifndef AFW_TABLE_AliasMap_h_INCLUDED
#define AFW_TABLE_AliasMap_h_INCLUDED

#include <map>
#include <string>

namespace lsst { namespace afw { namespace table {

class BaseTable;

class AliasMap {
    typedef std::map<std::string,std::string> Internal;
public:

    // Create an empty AliasMap
    AliasMap() : _internal(), _table(0) {}

    AliasMap(AliasMap const & other) : _internal(other._internal), _table(0) {}

    typedef std::map<std::string,std::string>::const_iterator Iterator;

    Iterator begin() const { return _internal.begin(); }

    Iterator end() const { return _internal.end(); }

    std::size_t size() const { return _internal.size(); }

    bool empty() const { return _internal.empty(); }

    std::string apply(std::string const & name) const;

    std::string get(std::string const & alias) const;

    void set(std::string const & alias, std::string const & target);

    bool erase(std::string const & alias);

private:

    friend class Schema;
    friend class SubSchema;
    friend class BaseTable;

    // Internal in-place implementation of apply()
    void _apply(std::string & name) const;

    Internal _internal;

    // Table to notify of any changes.  We can't use a shared_ptr here because the Table needs to set
    // this in its own constructor, but the Table does guarantee that this pointer is either valid or
    // null.
    BaseTable * _table;
};

}}} // namespace lsst::afw::table

#endif // !AFW_TABLE_AliasMap_h_INCLUDED