parameter/PathNavigator.cpp

/*
 * Copyright (c) 2011-2014, Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "PathNavigator.h"
#include "Tokenizer.h"

CPathNavigator::CPathNavigator(const std::string& strPath) : _uiCurrentIndex(0)
{
    init(strPath);
}

void CPathNavigator::init(const std::string& strPath)
{
    Tokenizer tokenizer(strPath, "/");

    _astrItems = tokenizer.split();

    _bValid = checkPathFormat(strPath);
}

bool CPathNavigator::isPathValid() const
{
    return _bValid;
}

// Navigate through
bool CPathNavigator::navigateThrough(const std::string& strItemName, std::string& strError)
{
    if (!_bValid) {

        strError = "Path not well formed: " + getCurrentPath();

        return false;
    }

    std::string* pStrChildName = next();

    if (!pStrChildName) {

        strError = "Path not complete: " + getCurrentPath() +
                   ", trying to access to " + strItemName;

        return false;
    }

    if (*pStrChildName != strItemName) {

        strError = "Path not found: " + getCurrentPath() +
                   ", expected: " + strItemName + " but found: " + *pStrChildName;

        return false;
    }

    return true;
}

std::string* CPathNavigator::next()
{
    if (_uiCurrentIndex < _astrItems.size()) {

        return &_astrItems[_uiCurrentIndex++];
    }

    return NULL;
}

std::string CPathNavigator::getCurrentPath() const
{
    std::string strPath = "/";

    if (!_uiCurrentIndex) {

        return strPath;
    }

    uint32_t uiItem;

    for (uiItem = 0; uiItem < _uiCurrentIndex - 1; uiItem++) {

        strPath += _astrItems[uiItem] + "/";
    }

    strPath += _astrItems[uiItem];

    return strPath;
}


bool CPathNavigator::checkPathFormat(const std::string& strUpl)
{
    return strUpl[0] == '/';
}