setExprBoundaryFields.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2019-2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Application
    setExprBoundaryFields
 
Group
    grpPreProcessingUtilities
 
Description
    Set boundary values using an expression
 
Note
    Based on funkySetBoundaryFields from
    Bernhard Gschaider <bgschaid@hfd-research.com>
 
\*---------------------------------------------------------------------------*/
 
#include "argList.H"
#include "Time.H"
#include "fvMesh.H"
#include "pointMesh.H"
#include "volFields.H"
#include "surfaceFields.H"
#include "pointFields.H"
#include "patchExprDriver.H"
#include "timeSelector.H"
#include "readFields.H"
 
using namespace Foam;
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Main program:
 
int main(int argc, char *argv[])
{
    // Normally without functionObjects, with -withFunctionObjects to enable
    argList::noFunctionObjects(true);
 
    // No -constant, no special treatment for 0/
    timeSelector::addOptions(false);
 
    argList::addBoolOption
    (
        "ascii",
        "Write in ASCII format instead of the controlDict setting"
    );
    argList::addOption
    (
        "dict",
        "file",
        "Alternative dictionary for setExprBoundaryFieldsDict"
    );
    argList::addBoolOption
    (
        "cache-fields",
        "Cache fields between calls",
        true // Advanced
    );
    argList::addOption
    (
        "load-fields",
        "wordList",
        "Specify field or fields to preload. Eg, 'T' or '(p T U)'",
        true // Advanced
    );
    argList::addBoolOption
    (
        "backup",
        "Preserve sub-entry as .backup",
        true // Advanced
    );
    argList::addDryRunOption
    (
        "Evaluate but do not write"
    );
 
    #include "addRegionOption.H"
    #include "setRootCase.H"
 
    const bool dryrun      = args.dryRun();
    const bool backup      = args.found("backup");
    const bool cacheFields = args.found("cache-fields");
 
    if (cacheFields)
    {
        Warning
            << "The current cache-fields behaviour (caching disk reads) "
            << "may lead to unexpected behaviour as previous modifications "
            << "will not be visible."
            << endl;
    }
 
    const word dictName("setExprBoundaryFieldsDict");
 
    #include "createTime.H"
 
    instantList times = timeSelector::select0(runTime, args);
 
    if (times.empty())
    {
        FatalErrorInFunction
            << "No times selected." << nl
            << exit(FatalError);
    }
 
    #include "createNamedMesh.H"
 
    #include "setSystemMeshDictionaryIO.H"
    IOdictionary setExprDict(dictIO);
 
    IOstreamOption streamOpt(runTime.writeFormat());
    if (args.found("ascii"))
    {
        streamOpt.format(IOstreamOption::ASCII);
    }
 
    forAll(times, timei)
    {
        runTime.setTime(times[timei], timei);
 
        Info<< "\nTime = " << runTime.timeName() << endl;
 
        mesh.readUpdate();
 
        // preload fields specified on command-line
        if (timei == 0)
        {
            wordList preloadFields;
            args.readListIfPresent("load-fields", preloadFields);
            readFieldsHandler(mesh).execute(preloadFields);
        }
        // preload fields specified in dictionary
        {
            wordList preloadFields;
            setExprDict.readIfPresent("readFields", preloadFields);
            readFieldsHandler(mesh).execute(preloadFields);
        }
 
        for (const entry& dEntry : setExprDict)
        {
            if (!dEntry.isDict())
            {
                if (dEntry.keyword() != "readFields")
                {
                    Info<< "Ignoring non-dictionary entry "
                        << dEntry.keyword() << nl;
                }
                continue;
            }
 
            const dictionary& dict = dEntry.dict();
 
            const word fieldName(dict.get<word>("field"));
 
            List<dictionary> exprDicts;
            dict.readEntry("expressions", exprDicts);
 
            if (exprDicts.empty())
            {
                Info<< "No expressions for " << fieldName << nl;
                continue;
            }
 
 
            // Read dictionary
            // Note: disable class type checking so we can load field
            const word oldTypeName = IOdictionary::typeName;
            const_cast<word&>(IOdictionary::typeName) = word::null;
 
            IOobject fieldHeader
            (
                fieldName,
                mesh.thisDb().time().timeName(),
                mesh.thisDb(),
                IOobject::MUST_READ_IF_MODIFIED,
                IOobject::NO_WRITE,
                IOobject::NO_REGISTER
            );
 
            const bool headOk = fieldHeader.typeHeaderOk<IOdictionary>(false);
 
            if (!headOk)
            {
                // Restore type
                const_cast<word&>(IOdictionary::typeName) = oldTypeName;
 
                WarningInFunction
                    << "Requested field to change " << fieldName
                    << " does not exist in " << fieldHeader.path() << endl;
                continue;
            }
 
            IOdictionary fieldDict(fieldHeader);
 
            // Restore type
            const_cast<word&>(IOdictionary::typeName) = oldTypeName;
 
            // Fake type back to what was in field
            const_cast<word&>(fieldDict.type()) = fieldDict.headerClassName();
 
            Info<< "Processing field " << fieldName << nl;
 
            dictionary& boundaryFieldDict = fieldDict.subDict("boundaryField");
 
            for (const dictionary& currDict : exprDicts)
            {
                const word patchName(currDict.get<word>("patch"));
                const word targetName(currDict.get<word>("target"));
 
                dictionary& patchDict = boundaryFieldDict.subDict(patchName);
 
                expressions::exprString valueExpr_("expression", currDict);
 
                Info<< "Set boundaryField/" << patchName << '/'
                    << targetName << nl
                    << "with expression" << nl
                    << "<<<<" << nl
                    << valueExpr_.c_str() << nl
                    << ">>>>" << nl;
 
                expressions::patchExprDriver driver(currDict, mesh);
 
                // Search files only
                driver.setSearchBehaviour
                (
                    expressions::exprDriver::SEARCH_FILES,
                    cacheFields
                );
 
                driver.clearVariables();
                driver.parse(valueExpr_);
 
                // Serializing via Field::writeEntry etc
                OStringStream serialize;
                driver.result().writeEntry("", serialize);
 
                if (backup && !dryrun)
                {
                    patchDict.changeKeyword
                    (
                        targetName,
                        word(targetName + ".backup"),
                        true  // Overwrite
                    );
                }
 
                patchDict.set(targetName, serialize.str().c_str());
 
                if (dryrun)
                {
                    Info<< "Evaluated:" << nl
                        << "<<<<" << nl
                        << serialize.str().c_str()  // (already includes nl)
                        << ">>>>" << nl;
                }
            }
 
            if (!dryrun)
            {
                Info<< "Write " << fieldDict.filePath() << nl;
                fieldDict.regIOobject::writeObject(streamOpt, true);
            }
        }
    }
 
    Info<< "\nEnd\n" << endl;
 
    return 0;
}
 
 
// ************************************************************************* //