upstream/parameter/ElementLocator.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 "ElementLocator.h"
#include "PathNavigator.h"

using std::string;

CElementLocator::CElementLocator(CElement *pSubRootElement, bool bStrict)
    : _pSubRootElement(pSubRootElement), _bStrict(bStrict)
{
}

// Locate element
bool CElementLocator::locate(const string &strPath, CElement **ppElement, string &strError)
{
    CPathNavigator pathNavigator(strPath);

    if (!pathNavigator.isPathValid()) {

        strError = "Invalid Path";

        return false;
    }

    // Sub root element?
    string *pStrChildName = pathNavigator.next();

    if (!pStrChildName) {

        if (_bStrict) {

            strError = "Path not found: " + strPath;

            return false;
        }
        // Empty path
        return true;
    }

    if (*pStrChildName != _pSubRootElement->getName()) {

        strError = "Path not found: " + strPath;

        return false;
    }

    // Find in tree
    *ppElement = _pSubRootElement->findDescendant(pathNavigator);

    if (!*ppElement) {

        strError = "Path not found: " + strPath;

        return false;
    }

    return true;
}