torc/physical/Named.hpp

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// Torc - Copyright 2011 University of Southern California.  All Rights Reserved.
// $HeadURL: https://svn.east.isi.edu/torc/trunk/src/torc/physical/Named.hpp $
// $Id: Named.hpp 523 2011-06-25 00:54:11Z nsteiner $

// 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, either version 3 of the 
// License, or (at your option) any later version.
// 
// 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 General Public License along with this program.  If 
// not, see <http://www.gnu.org/licenses/>.

/// \file
/// \brief Header for the Named class.

#ifndef TORC_PHYSICAL_NAMED_HPP
#define TORC_PHYSICAL_NAMED_HPP

#include <string>
#include <boost/smart_ptr.hpp>

namespace torc {
namespace physical {

    /// \brief Concept for any object that can be named.
    /// \details No support is provided at this level for renaming, because many subclasses may 
    ///     may require oversight from their parent to avoid name collisions.
    /// \todo Add a setName() accessor to support renaming.  For many design elements, this may 
    ///     require permission from the parent, to avoid name collisions.  We could make the 
    ///     function virtual, but that would come at the cost of a vtable, and that's very 
    ///     expensive for things like Config objects.  In general, the renaming should probably be 
    ///     managed by the Progeny<T> template.
    class Named {
    protected:
    // types
        /// \brief Imported type name.
        typedef std::string string;
    // members
        /// \brief The name of the object.
        string mName;
    public:
    // constructors
        /// \brief Constructor which must specify the object name.
        /// \param inName The object name.
        Named(const string& inName) : mName(inName) {}
    // accessors
        /// \brief Returns the object name.
        const string& getName(void) const { return mName; }
    // operators
        /// \brief Equality operator.
        bool operator ==(const Named& rhs) const { return mName == rhs.mName; }
    };

    /// \brief Shared pointer encapsulation of a Named object.
    typedef boost::shared_ptr<Named> NamedSharedPtr;

    /// \brief Comparator class to serve as a predicate when searching for names.
    class NameComparator {
    protected:
    // types
        /// \brief Imported type name.
        typedef std::string string;
    // members
        /// \brief The name to compare against.
        const string& mName;
    public:
    // constructors
        /// \brief Constructor.
        /// \param inName The name to compare against.
        NameComparator(const string& inName) : mName(inName) {}
    // operators
        /// \brief Function operator taking a Named object.
        /// \returns true if the given object's name matches the desired name, or false 
        ///     otherwise.
        bool operator() (const Named& inNamed) const { return inNamed.getName() == mName; }
        /// \brief Function operator taking a Named shared pointer.
        /// \returns true if the given object's name matches the desired name, or false 
        ///     otherwise.
        bool operator() (const NamedSharedPtr& inNamedPtr) const 
            { return inNamedPtr->getName() == mName; }
    };

} // namespace physical
} // namespace torc

#endif // TORC_PHYSICAL_NAMED_HPP

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