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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Jsoncpp works and it’s already added in VTK, so it is a convenient choice. However, we’ve found that if you work with large documents then it is unbearably slow
(not just parsing, but accessing data in memory). For large files, I would recommend RapidJSON instead.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Some advantages of RapidJSON:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Magnitudes faster, also, its API facilitates writing efficient application code (although this API is also a bit more complex than jsoncpp)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">CMake-ified<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Header-only (no need to install DLLs, ...)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">More conform to json standard<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Library is much smaller (31k vs 243k)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Some more background:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><a href="https://github.com/Slicer/Slicer/pull/646">https://github.com/Slicer/Slicer/pull/646</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Andras
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> vtk-developers [mailto:vtk-developers-bounces@vtk.org]
<b>On Behalf Of </b>Will Schroeder<br>
<b>Sent:</b> Tuesday, December 12, 2017 9:09 AM<br>
<b>To:</b> vtk-developers <vtk-developers@vtk.org><br>
<b>Subject:</b> [vtk-developers] Parsing and reading json files<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Background:<o:p></o:p></p>
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<p class="MsoNormal">I am working with a research team performing biological simulation (<a href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fresearch.uconn.edu%2F2017%2F10%2F19%2Fuconn-healthjax-faculty-wins-2-7m-grant-to-develop-better-tools-for-biomedical-modeling%2F&data=02%7C01%7Classo%40queensu.ca%7C89e840b968aa4141447e08d54169ed9f%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636486845569042193&sdata=3eTq%2BjY3MolCl89bBFHpTW5A4WM3YL5srZRJ2yy%2BOns%3D&reserved=0">UConn
fungal simulation</a>). Their simulation code (<a href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fccl.northwestern.edu%2Fnetlogo%2F&data=02%7C01%7Classo%40queensu.ca%7C89e840b968aa4141447e08d54169ed9f%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636486845569042193&sdata=%2B7qG4nmn21dKirqdjt38h7JouwBl%2FsnDxl%2BzkvvCwO8%3D&reserved=0">NetLogo</a>)
has been instrumented to output JSON files for the purposes of visualization. <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Advice needed:<o:p></o:p></p>
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<p class="MsoNormal">We need to read their data so I intend to write a VTK reader to parse these JSON files. It appears that "VTK/ThirdParty/jsoncpp" is the way to go, please correct me if I am wrong and/or offer an alternate approach.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best,<br>
W<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal">William J. Schroeder, PhD<br>
Kitware, Inc. - Building the World's Technical Computing Software<br>
28 Corporate Drive<br>
Clifton Park, NY 12065<br>
<a href="mailto:will.schroeder@kitware.com" target="_blank">will.schroeder@kitware.com</a><br>
<a href="https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.kitware.com&data=02%7C01%7Classo%40queensu.ca%7C89e840b968aa4141447e08d54169ed9f%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636486845569042193&sdata=AodQJJA0zEuInutPR23xmj9LgqQVXJwSet%2BpCItw4fM%3D&reserved=0" target="_blank">http://www.kitware.com</a><br>
(518) 881-4902<o:p></o:p></p>
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