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      1 /*
      2  * Copyright (c) 2011-2014, Intel Corporation
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without modification,
      6  * are permitted provided that the following conditions are met:
      7  *
      8  * 1. Redistributions of source code must retain the above copyright notice, this
      9  * list of conditions and the following disclaimer.
     10  *
     11  * 2. Redistributions in binary form must reproduce the above copyright notice,
     12  * this list of conditions and the following disclaimer in the documentation and/or
     13  * other materials provided with the distribution.
     14  *
     15  * 3. Neither the name of the copyright holder nor the names of its contributors
     16  * may be used to endorse or promote products derived from this software without
     17  * specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     22  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
     23  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     26  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 #include "PathNavigator.h"
     31 #include "Tokenizer.h"
     32 
     33 CPathNavigator::CPathNavigator(const std::string &strPath)
     34 {
     35     init(strPath);
     36 }
     37 
     38 void CPathNavigator::init(const std::string &strPath)
     39 {
     40     Tokenizer tokenizer(strPath, "/");
     41 
     42     _astrItems = tokenizer.split();
     43 
     44     _bValid = checkPathFormat(strPath);
     45 }
     46 
     47 bool CPathNavigator::isPathValid() const
     48 {
     49     return _bValid;
     50 }
     51 
     52 // Navigate through
     53 bool CPathNavigator::navigateThrough(const std::string &strItemName, std::string &strError)
     54 {
     55     if (!_bValid) {
     56 
     57         strError = "Path not well formed: " + getCurrentPath();
     58 
     59         return false;
     60     }
     61 
     62     std::string *pStrChildName = next();
     63 
     64     if (!pStrChildName) {
     65 
     66         strError =
     67             "Path not complete: " + getCurrentPath() + ", trying to access to " + strItemName;
     68 
     69         return false;
     70     }
     71 
     72     if (*pStrChildName != strItemName) {
     73 
     74         strError = "Path not found: " + getCurrentPath() + ", expected: " + strItemName +
     75                    " but found: " + *pStrChildName;
     76 
     77         return false;
     78     }
     79 
     80     return true;
     81 }
     82 
     83 std::string *CPathNavigator::next()
     84 {
     85     if (_currentIndex < _astrItems.size()) {
     86 
     87         return &_astrItems[_currentIndex++];
     88     }
     89 
     90     return NULL;
     91 }
     92 
     93 std::string CPathNavigator::getCurrentPath() const
     94 {
     95     std::string strPath = "/";
     96 
     97     if (!_currentIndex) {
     98 
     99         return strPath;
    100     }
    101 
    102     size_t item;
    103     for (item = 0; item < _currentIndex - 1; item++) {
    104 
    105         strPath += _astrItems[item] + "/";
    106     }
    107 
    108     strPath += _astrItems[item];
    109 
    110     return strPath;
    111 }
    112 
    113 bool CPathNavigator::checkPathFormat(const std::string &strUpl)
    114 {
    115     return strUpl[0] == '/';
    116 }
    117