IOobject.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
     \\/     M anipulation  | Copyright (C) 2015 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/>.
 
\*---------------------------------------------------------------------------*/
 
#include "IOobject.H"
#include "Time.H"
#include "IFstream.H"
#include "StaticHashTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
    defineTypeNameAndDebug(IOobject, 0);
}
 
static Foam::StaticHashTable<Foam::word> replacedFileNames_;
 
// * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * * //
 
bool Foam::IOobject::fileNameComponents
(
    const fileName& path,
    fileName& instance,
    fileName& local,
    word& name
)
{
    instance.clear();
    local.clear();
    name.clear();
 
    // called with directory
    if (isDir(path))
    {
        WarningInFunction
            << " called with directory: " << path << endl;
 
        return false;
    }
 
    if (path.isAbsolute())
    {
        string::size_type last = path.rfind('/');
        instance = path.substr(0, last);
 
        // Check afterwards
        name.string::operator=(path.substr(last+1));
    }
    else
    {
        string::size_type first = path.find('/');
 
        if (first == string::npos)
        {
            // no '/' found - no instance or local
 
            // check afterwards
            name.string::operator=(path);
        }
        else
        {
            instance = path.substr(0, first);
 
            string::size_type last = path.rfind('/');
            if (last > first)
            {
                // with local
                local = path.substr(first+1, last-first-1);
            }
 
            // check afterwards
            name.string::operator=(path.substr(last+1));
        }
    }
 
 
    // Check for valid (and stripped) name, regardless of the debug level
    if (name.empty() || string::stripInvalid<word>(name))
    {
        WarningInFunction
            << "has invalid word for name: \"" << name
            << "\"\nwhile processing path: " << path << endl;
 
        return false;
    }
 
    return true;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::IOobject::IOobject
(
    const word& name,
    const fileName& instance,
    const objectRegistry& registry,
    readOption ro,
    writeOption wo,
    bool registerObject
)
:
    name_(name),
    headerClassName_(typeName),
    note_(),
    instance_(instance),
    local_(),
    db_(registry),
    rOpt_(ro),
    wOpt_(wo),
    registerObject_(registerObject),
    objState_(GOOD)
{
    if (objectRegistry::debug)
    {
        Info<< "Constructing IOobject called " << name_
            << " of type " << headerClassName_
            << endl;
    }
}
 
 
Foam::IOobject::IOobject
(
    const word& name,
    const fileName& instance,
    const fileName& local,
    const objectRegistry& registry,
    readOption ro,
    writeOption wo,
    bool registerObject
)
:
    name_(name),
    headerClassName_(typeName),
    note_(),
    instance_(instance),
    local_(local),
    db_(registry),
    rOpt_(ro),
    wOpt_(wo),
    registerObject_(registerObject),
    objState_(GOOD)
{
    if (objectRegistry::debug)
    {
        Info<< "Constructing IOobject called " << name_
            << " of type " << headerClassName_
            << endl;
    }
}
 
 
Foam::IOobject::IOobject
(
    const fileName& path,
    const objectRegistry& registry,
    readOption ro,
    writeOption wo,
    bool registerObject
)
:
    name_(),
    headerClassName_(typeName),
    note_(),
    instance_(),
    local_(),
    db_(registry),
    rOpt_(ro),
    wOpt_(wo),
    registerObject_(registerObject),
    objState_(GOOD)
{
    if (!fileNameComponents(path, instance_, local_, name_))
    {
        FatalErrorInFunction
            << " invalid path specification"
            << exit(FatalError);
    }
 
    if (objectRegistry::debug)
    {
        Info<< "Constructing IOobject called " << name_
            << " of type " << headerClassName_
            << endl;
    }
}
 
 
Foam::IOobject::IOobject
(
    const IOobject& io,
    const word& name
)
:
    name_(name),
    headerClassName_(io.headerClassName_),
    note_(io.note_),
    instance_(io.instance_),
    local_(io.local_),
    db_(io.db_),
    rOpt_(io.rOpt_),
    wOpt_(io.wOpt_),
    registerObject_(io.registerObject_),
    objState_(io.objState_)
{}
 
 
// * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * * //
 
Foam::IOobject::~IOobject()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
const Foam::objectRegistry& Foam::IOobject::db() const
{
    return db_;
}
 
 
const Foam::Time& Foam::IOobject::time() const
{
    return db_.time();
}
 
 
const Foam::fileName& Foam::IOobject::caseName() const
{
    return time().caseName();
}
 
 
Foam::word Foam::IOobject::group() const
{
    word::size_type i = name_.find_last_of('.');
 
    if (i == word::npos || i == 0)
    {
        return word::null;
    }
    else
    {
        return name_.substr(i+1, word::npos);
    }
}
 
 
Foam::word Foam::IOobject::member() const
{
    word::size_type i = name_.find_last_of('.');
 
    if (i == word::npos || i == 0)
    {
        return name_;
    }
    else
    {
        return name_.substr(0, i);
    }
}
 
 
const Foam::fileName& Foam::IOobject::rootPath() const
{
    return time().rootPath();
}
 
 
Foam::fileName Foam::IOobject::path() const
{
    if (instance().isAbsolute())
    {
        return instance();
    }
    else
    {
        return rootPath()/caseName()/instance()/db_.dbDir()/local();
    }
}
 
 
Foam::fileName Foam::IOobject::path
(
    const word& instance,
    const fileName& local
) const
{
    // Note: can only be called with relative instance since is word type
    return rootPath()/caseName()/instance/db_.dbDir()/local;
}
 
 
void Foam::IOobject::replaceFileName(const Foam::word & from, 
                                     const Foam::word & to)
{
    replacedFileNames_.insert(from, to);
}
 
 
const Foam::word & Foam::IOobject::uniqueFileName() const
{
    StaticHashTable<word>::const_iterator findIt = 
      replacedFileNames_.find(name());
 
    const word & diskFileName = (findIt == replacedFileNames_.end()) ?
      name() : *findIt;
 
    return diskFileName;
}
 
 
Foam::fileName Foam::IOobject::filePath() const
{
    const word & diskFileName = uniqueFileName();
 
    if (instance().isAbsolute())
    {
        fileName objectPath = instance()/diskFileName;
        if (isFile(objectPath))
        {
            return objectPath;
        }
        else
        {
            return fileName::null;
        }
    }
    else
    {
        fileName path = this->path();
        fileName objectPath = path/diskFileName;
 
        if (isFile(objectPath))
        {
            return objectPath;
        }
        else
        {
            if
            (
                time().processorCase()
             && (
                    instance() == time().system()
                 || instance() == time().constant()
                )
            )
            {
                fileName parentObjectPath =
                    rootPath()/time().globalCaseName()
                   /instance()/db_.dbDir()/local()/diskFileName;
 
                if (isFile(parentObjectPath))
                {
                    return parentObjectPath;
                }
            }
 
            if (!isDir(path))
            {
                word newInstancePath = time().findInstancePath
                (
                    instant(instance())
                );
 
                if (newInstancePath.size())
                {
                    fileName fName
                    (
                        rootPath()/caseName()
                       /newInstancePath/db_.dbDir()/local()/diskFileName
                    );
 
                    if (isFile(fName))
                    {
                        return fName;
                    }
                }
            }
        }
 
        return fileName::null;
    }
}
 
 
Foam::Istream* Foam::IOobject::objectStream()
{
    return objectStream(filePath());
}
 
 
Foam::Istream* Foam::IOobject::objectStream(const fileName& fName)
{
    if (fName.size())
    {
        IFstream* isPtr = new IFstream(fName);
 
        if (isPtr->good())
        {
            return isPtr;
        }
        else
        {
            delete isPtr;
            return NULL;
        }
    }
    else
    {
        return NULL;
    }
}
 
 
bool Foam::IOobject::headerOk()
{
    bool ok = true;
 
    Istream* isPtr = objectStream();
 
    // If the stream has failed return
    if (!isPtr)
    {
        if (objectRegistry::debug)
        {
            Info
                << "IOobject::headerOk() : "
                << "file " << objectPath() << " could not be opened"
                << endl;
        }
 
        ok = false;
    }
    else
    {
        // Try reading header
        if (!readHeader(*isPtr))
        {
            if (objectRegistry::debug)
            {
                IOWarningInFunction((*isPtr))
                    << "failed to read header of file " << objectPath()
                    << endl;
            }
 
            ok = false;
        }
    }
 
    delete isPtr;
 
    return ok;
}
 
 
void Foam::IOobject::setBad(const string& s)
{
    if (objState_ != GOOD)
    {
        FatalErrorInFunction
            << "recurrent failure for object " << s
            << exit(FatalError);
    }
 
    if (error::level)
    {
        Info<< "IOobject::setBad(const string&) : "
            << "broken object " << s << info() << endl;
    }
 
    objState_ = BAD;
}
 
 
void Foam::IOobject::operator=(const IOobject& io)
{
    name_ = io.name_;
    headerClassName_ = io.headerClassName_;
    note_ = io.note_;
    instance_ = io.instance_;
    local_ = io.local_;
    rOpt_ = io.rOpt_;
    wOpt_ = io.wOpt_;
    objState_ = io.objState_;
}
 
 
// ************************************************************************* //