ResourceName.h

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/*
 * Copyright (C) 2012 by
 *   MetraLabs GmbH (MLAB), GERMANY
 * and
 *   Neuroinformatics and Cognitive Robotics Labs (NICR) at TU Ilmenau, GERMANY
 * All rights reserved.
 *
 * Contact: info@mira-project.org
 *
 * Commercial Usage:
 *   Licensees holding valid commercial licenses may use this file in
 *   accordance with the commercial license agreement provided with the
 *   software or, alternatively, in accordance with the terms contained in
 *   a written agreement between you and MLAB or NICR.
 *
 * GNU General Public License Usage:
 *   Alternatively, this file may be used under the terms of the GNU
 *   General Public License version 3.0 as published by the Free Software
 *   Foundation and appearing in the file LICENSE.GPL3 included in the
 *   packaging of this file. Please review the following information to
 *   ensure the GNU General Public License version 3.0 requirements will be
 *   met: http://www.gnu.org/copyleft/gpl.html.
 *   Alternatively you may (at your option) use any later version of the GNU
 *   General Public License if such license has been publicly approved by
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 *
 * IN NO EVENT SHALL "MLAB" OR "NICR" BE LIABLE TO ANY PARTY FOR DIRECT,
 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
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 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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 */

#ifndef _MIRA_RESOURCENAME_H_
#define _MIRA_RESOURCENAME_H_

#include <string>
#include <ostream>
#include <istream>

#include <error/Exceptions.h>

#include <serialization/IsTransparentSerializable.h>

namespace mira {


class ResourceName
{
private:

    ResourceName(const std::string& name, bool dontNormalize) : mName(name) {}

public:
    ResourceName() {}

    ResourceName(const std::string& name) : mName(normalize(name)) {
        if(!validate(mName))
            MIRA_THROW(XInvalidParameter, 
                       "Trying to create ResourceName from invalid name: '"
                       << mName << "'");
    }

    ResourceName(const char* name) : mName(normalize(std::string(name))) {
        if(!validate(mName))
            MIRA_THROW(XInvalidParameter, 
                       "Trying to create ResourceName from invalid name: '"
                       << mName << "'");
    }

    ResourceName(const ResourceName& other) : mName(other.mName) {}

public:

    const ResourceName& operator=(const std::string& other) {
        mName = normalize(other);
        return *this;
    }

    const ResourceName& operator=(const ResourceName& other) {
        mName = other.mName;
        return *this;
    }

#if defined(MIRA_GNUC_VERSION)
# if MIRA_GNUC_VERSION >= 40601
    operator std::string() const { return mName; }
# else
    operator const std::string&() const { return mName; }
# endif
#else
    // this should be the preferred version, that is supported by GCC < 4.6.1 and VC 2010
    operator const std::string&() const { return mName; } 
#endif

    const std::string& str() const { return mName; }

public:

    ResourceName parent() const;

    std::string leaf() const;

    bool isAncestorOf(const ResourceName& other) const;

    bool isParentOf(const ResourceName& other) const;

    bool isSuccessorOf(const ResourceName& other) const;

    bool isChildOf(const ResourceName& other) const;

public:

    bool operator<(const ResourceName& other) const  { return mName <  other.mName; }
    bool operator<=(const ResourceName& other) const { return mName <= other.mName; }
    bool operator>(const ResourceName& other) const  { return mName >  other.mName; }
    bool operator>=(const ResourceName& other) const { return mName >= other.mName; }
    bool operator==(const ResourceName& other) const { return mName == other.mName; }
    bool operator!=(const ResourceName& other) const { return mName != other.mName; }

public:

    std::string::value_type operator[](std::string::size_type i) { return mName[i]; }

public:
    template<typename Reflector>
    void reflect(Reflector& r) {
        r.delegate(mName);
    }

    std::string operator/(const std::string& other) const {
        if(isRoot()) // we are the root namespace
            return mName + other;

        // concatenate both names
        return mName + "/" + other;
    }

    ResourceName operator/(const ResourceName& other) const {
        return ResourceName(*this / other.mName, true);
    }

    const ResourceName& operator/=(const ResourceName& other) {
        if(isRoot())
            mName += other.mName;
        else
            mName += "/" + other.mName;
        return *this;
    }

    bool isRoot() const {
        return mName.size()==1 && mName[0]=='/';
    }

    bool isFullyQualified() const {
        if(mName.empty())
            return false;

        return mName[0]=='/';
    }

public:

    static ResourceName makeFullyQualified(const ResourceName& name,
                                           const ResourceName& ns);

public:

    friend std::ostream& operator<<(std::ostream& os, const ResourceName& name)
    {
        os << name.mName;
        return os;
    }

    friend std::istream& operator>>(std::istream& is, ResourceName& name)
    {
        std::string s;
        is >> s;
        name = s;
        return is;
    }

private:

    static std::string normalize(const std::string& name);

    static bool validate(const std::string& name);

private:
    std::string mName;
};


template<typename SerializerTag>
class IsTransparentSerializable<ResourceName,SerializerTag> : public std::true_type {};


}

#endif