/usr/include/trilinos/BelosOrthoManagerFactory.hpp is in libtrilinos-belos-dev 12.10.1-3.
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// ************************************************************************
//
// Belos: Block Linear Solvers Package
// Copyright 2004 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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//
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// contributors may be used to endorse or promote products derived from
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//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
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//@HEADER
#ifndef __Belos_OrthoManagerFactory_hpp
#define __Belos_OrthoManagerFactory_hpp
#include <BelosConfigDefs.hpp>
#ifdef HAVE_BELOS_TSQR
# include <BelosTsqrOrthoManager.hpp>
#endif // HAVE_BELOS_TSQR
#include <BelosICGSOrthoManager.hpp>
#include <BelosIMGSOrthoManager.hpp>
#include <BelosDGKSOrthoManager.hpp>
#include <BelosSimpleOrthoManager.hpp>
#include <BelosOutputManager.hpp>
#include <Teuchos_StandardCatchMacros.hpp>
#include <algorithm>
#include <sstream>
#include <stdexcept> // #include <string>
#include <vector>
//////////////////////////////////////////////////////////////////////
namespace Belos {
/// \class OrthoManagerFactory
/// \brief Enumeration of all valid Belos (Mat)OrthoManager classes.
///
/// This factory class knows how to initialize any of Belos' \c
/// MatOrthoManager subclasses, given a short name of the subclass
/// (as would naturally belong in a SolverManager's parameter list).
/// As such, it may be used by any of Belos' \c SolverManager
/// subclasses that use a (Mat)OrthoManager subclass for
/// orthogonalization.
///
/// This class' template parameters are the same as those of \c
/// MatOrthoManager: Scalar is the scalar type (of entries in the
/// multivector), MV is the multivector type, and OP is the operator
/// type. For example: Scalar=double, MV=Epetra_MultiVector, and
/// OP=Epetra_Operator.
template<class Scalar, class MV, class OP>
class OrthoManagerFactory {
private:
//! List of valid OrthoManager names.
std::vector<std::string> theList_;
public:
/// \brief Number of MatOrthoManager subclasses this factory recognizes.
static int numOrthoManagers () {
#ifdef HAVE_BELOS_TSQR
return 5;
#else
return 4;
#endif // HAVE_BELOS_TSQR
}
/// \brief Is the given MatOrthoManager subclass rank-reealing?
///
/// Return true if and only if the given MatOrthoManager name is
/// that of a MatOrthoManager subclass with rank-revealing
/// capability.
static bool isRankRevealing (const std::string& name) {
#ifdef HAVE_BELOS_TSQR
// Currently only TSQR has a full rank-revealing capability.
return (name == "TSQR");
#else
return false;
#endif // HAVE_BELOS_TSQR
}
//! Constructor.
OrthoManagerFactory () : theList_ (numOrthoManagers())
{
int index = 0;
theList_[index++] = "DGKS";
theList_[index++] = "ICGS";
theList_[index++] = "IMGS";
#ifdef HAVE_BELOS_TSQR
theList_[index++] = "TSQR";
#endif // HAVE_BELOS_TSQR
theList_[index++] = "Simple";
}
/// \brief List of MatOrthoManager subclasses this factory recognizes.
///
/// This is useful as a list of valid command-line parameter
/// values for choosing a MatOrthoManager subclass to test.
///
/// \note To implementers: Anasazi and Belos currently implement
/// different sets of (Mat)OrthoManagers. This method returns a
/// valid list of Belos MatOrthoManager subclasses.
const std::vector<std::string>&
validNames () const { return theList_; }
//! Whether this factory recognizes the MatOrthoManager with the given name.
bool
isValidName (const std::string& name) const
{
return (std::find (theList_.begin(), theList_.end(), name) != theList_.end());
}
//! Print all recognized MatOrthoManager names to the given ostream.
std::ostream&
printValidNames (std::ostream& out) const
{
const int numValid = numOrthoManagers();
TEUCHOS_TEST_FOR_EXCEPTION(numValid <= 0, std::logic_error,
"Invalid number " << numValid << " of valid MatOrtho"
"Manager names. Please report this bug to the Belos "
"developers." );
if (numValid > 1) {
for (int k = 0; k < numValid - 1; ++k)
out << "\"" << theList_[k] << "\", ";
out << "or ";
}
out << "\"" << theList_[numValid-1] << "\"";
return out;
}
/// \brief List (as a string) of recognized MatOrthoManager names.
///
/// This is useful for generating help for command-line arguments,
/// when writing a test that uses different orthogonalizations.
std::string
validNamesString () const
{
std::ostringstream os;
(void) printValidNames (os);
return os.str();
}
/// \brief Name of the "default" MatOrthoManager subclass.
///
/// This is the name of the MatOrthoManager subclass that serves
/// as a reasonable default for all Belos solvers that use general
/// orthogonalizations. It may not be the fastest or the most
/// accurate, but it should be the most reasonable.
const std::string& defaultName () const { return theList_[0]; }
/// \brief Default parameters for the given MatOrthoManager subclass.
///
/// \param name [in] MatOrthoManager subclass short name, for
/// which isValidName(name) returns true.
///
/// \note This method does not cache its return value, so every
/// time you call this method with the same \c name argument, a
/// new parameter list will be created. You can save the
/// parameter list yourself if you want to reuse it.
Teuchos::RCP<const Teuchos::ParameterList>
getDefaultParameters (const std::string& name) const
{
if (name == "DGKS") {
DGKSOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getValidParameters ();
}
#ifdef HAVE_BELOS_TSQR
else if (name == "TSQR") {
TsqrMatOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getValidParameters ();
}
#endif // HAVE_BELOS_TSQR
else if (name == "ICGS") {
ICGSOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getValidParameters ();
}
else if (name == "IMGS") {
IMGSOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getValidParameters ();
}
else if (name == "Simple") {
IMGSOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getValidParameters ();
}
else {
TEUCHOS_TEST_FOR_EXCEPTION(true, std::invalid_argument,
"Invalid orthogonalization manager name \"" << name
<< "\": Valid names are " << validNamesString()
<< ". For many of the test executables, the "
"orthogonalization manager name often corresponds "
"to the \"ortho\" command-line argument.");
// Placate the compiler if necessary; we should never reach
// this point.
return Teuchos::null;
}
}
/// \brief "Fast" parameters for the given MatOrthoManager subclass.
///
/// "Fast" usually means that accuracy and/or robustness (with
/// respect to rank deficiency) might be compromised in order to
/// improve performance.
///
/// \param name [in] MatOrthoManager subclass short name, for
/// which isValidName(name) returns true.
///
/// \note This method does not cache its return value, so every
/// time you call this method with the same \c name argument, a
/// new parameter list will be created. You can save the
/// parameter list yourself if you want to reuse it.
Teuchos::RCP<const Teuchos::ParameterList>
getFastParameters (const std::string& name) const
{
if (name == "DGKS") {
DGKSOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getFastParameters ();
}
#ifdef HAVE_BELOS_TSQR
else if (name == "TSQR") {
TsqrMatOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getFastParameters ();
}
#endif // HAVE_BELOS_TSQR
else if (name == "ICGS") {
ICGSOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getFastParameters ();
}
else if (name == "IMGS") {
IMGSOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getFastParameters ();
}
else if (name == "Simple") {
IMGSOrthoManager<Scalar, MV, OP> orthoMan;
return orthoMan.getFastParameters ();
}
else {
TEUCHOS_TEST_FOR_EXCEPTION(true, std::invalid_argument,
"Invalid orthogonalization manager name \"" << name
<< "\": Valid names are " << validNamesString()
<< ". For many of the test executables, the "
"orthogonalization manager name often corresponds "
"to the \"ortho\" command-line argument.");
// Placate the compiler if necessary; we should never reach
// this point.
return Teuchos::null;
}
}
/// \brief Return an instance of the specified MatOrthoManager subclass.
///
/// \param ortho [in] Name of the MatOrthoManager subclass
/// instance to return. The \c validNames() method returns a
/// list of the supported names.
/// \param M [in] Inner product operator. If Teuchos::null,
/// orthogonalize with respect to the standard Euclidean
/// inner product.
/// \param outMan [in/out] Output manager, which the OrthoManager
/// instance may use (but is not required to use) for various
/// kinds of status output.
/// \param label [in] Label for Belos-specific timers, if Belos
/// timers were enabled at compile time. Otherwise, this
/// parameter's value doesn't matter.
/// \param params [in/out] Optional list of parameters for setting
/// up the specific MatOrthoManager subclass. A default
/// parameter list with embedded documentation is available for
/// each MatOrthoManager subclass that this factory knows how to
/// make.
Teuchos::RCP<Belos::MatOrthoManager<Scalar, MV, OP> >
makeMatOrthoManager (const std::string& ortho,
const Teuchos::RCP<const OP>& M,
const Teuchos::RCP<OutputManager<Scalar> >& outMan,
const std::string& label,
const Teuchos::RCP<Teuchos::ParameterList>& params)
{
#ifdef HAVE_BELOS_TSQR
using Belos::TsqrMatOrthoManager;
#endif // HAVE_BELOS_TSQR
using Belos::ICGSOrthoManager;
using Belos::IMGSOrthoManager;
using Belos::DGKSOrthoManager;
using Belos::SimpleOrthoManager;
using Teuchos::rcp;
if (ortho == "DGKS") {
typedef DGKSOrthoManager<Scalar, MV, OP> dgks_type;
return rcp (new dgks_type (params, label, M));
}
#ifdef HAVE_BELOS_TSQR
else if (ortho == "TSQR") {
typedef TsqrMatOrthoManager<Scalar, MV, OP> ortho_type;
return rcp (new ortho_type (params, label, M));
}
#endif // HAVE_BELOS_TSQR
else if (ortho == "ICGS") {
typedef ICGSOrthoManager<Scalar, MV, OP> ortho_type;
return rcp (new ortho_type (params, label, M));
}
else if (ortho == "IMGS") {
typedef IMGSOrthoManager<Scalar, MV, OP> ortho_type;
return rcp (new ortho_type (params, label, M));
}
else if (ortho == "Simple") {
TEUCHOS_TEST_FOR_EXCEPTION(ortho == "Simple", std::logic_error,
"SimpleOrthoManager does not yet support "
"the MatOrthoManager interface");
}
TEUCHOS_TEST_FOR_EXCEPTION(true, std::invalid_argument,
"Invalid orthogonalization manager name: Valid names"
" are " << validNamesString() << ". For many of "
"the test executables, the orthogonalization manager"
" name often corresponds to the \"ortho\" command-"
"line argument.");
return Teuchos::null; // Guard to avoid compiler warnings.
}
/// \brief Return an instance of the specified OrthoManager subclass.
///
/// \param ortho [in] Name of the OrthoManager subclass instance
/// to return. The \c validNames() method returns a list of the
/// supported names.
/// \param M [in] Inner product operator. If Teuchos::null,
/// orthogonalize with respect to the standard Euclidean inner
/// product.
/// \param outMan [in/out] Output manager, which the OrthoManager
/// instance may use (but is not required to use) for various
/// kinds of status output.
/// \param label [in] Label for timers.
/// \param params [in/out] Optional list of parameters for
/// setting up the specific OrthoManager subclass.
///
/// \return OrthoManager instance.
Teuchos::RCP<Belos::OrthoManager<Scalar, MV> >
makeOrthoManager (const std::string& ortho,
const Teuchos::RCP<const OP>& M,
const Teuchos::RCP<OutputManager<Scalar> >& outMan,
const std::string& label,
const Teuchos::RCP<Teuchos::ParameterList>& params)
{
#ifdef HAVE_BELOS_TSQR
using Belos::TsqrOrthoManager;
#endif // HAVE_BELOS_TSQR
using Teuchos::rcp;
if (ortho == "Simple") {
TEUCHOS_TEST_FOR_EXCEPTION(! M.is_null(), std::logic_error,
"SimpleOrthoManager is not yet supported "
"when the operator M is nontrivial (i.e., "
"M != null).");
return rcp (new SimpleOrthoManager<Scalar, MV> (outMan, label, params));
}
#ifdef HAVE_BELOS_TSQR
// TsqrMatOrthoManager has to store more things and do more work
// than TsqrOrthoManager, in order for the former to be correct
// for the case of a nondefault (non-Euclidean) inner product.
// Thus, it's better to create a TsqrOrthoManager, when we know
// the operator is the default operator (M is null). Of course,
// a MatOrthoManager is-an OrthoManager, so returning a
// TsqrMatOrthoManager would still be correct; this is just an
// optimization.
else if (ortho == "TSQR" && M.is_null()) {
return rcp (new TsqrOrthoManager<Scalar, MV> (params, label));
}
#endif // HAVE_BELOS_TSQR
else {
// A MatOrthoManager is-an OrthoManager.
return makeMatOrthoManager (ortho, M, outMan, label, params);
}
}
};
} // namespace Belos
#endif // __Belos_OrthoManagerFactory_hpp
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