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// NOX: An Object-Oriented Nonlinear Solver Package
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#ifndef NOX_STATUSTEST_COMBO_H
#define NOX_STATUSTEST_COMBO_H
#include "NOX_StatusTest_Generic.H" // base class
#include "NOX_Common.H" // class data element (vector)
#include "NOX_Utils.H" // class data element
namespace NOX {
namespace StatusTest {
/*!
\brief Arbitrary combination of status tests.
In the \c AND (see NOX::StatusTest::Combo::ComboType) combination, the
result is \c Unconverged (see NOX::StatusTest::StatusType) if \e any of
the tests is \c Unconverged. Otherwise, the result is equal to the
result of the \e first test in the list that is either \c Converged
or \c Failed. It is not recommended to mix \c Converged and \c
Failed tests in an \c AND combination.
In the \c OR combination, the result is \c Unconverged if \e all of
the tests are \c Unconverged. Otherwise, it is the result of the \e
first test in the list that is either \c Converged or \c
Failed. Therefore, it will generally make sense to put the \c Failed
-type tests at the end of the \c OR list.
\note We call checkStatus on \e every convergence test, though some
may be called with the NOX::StatusTest::None option.
\author Tammy Kolda (SNL 8950) and Roger Pawlowski (SNL 1416)
*/
class Combo : public Generic {
public:
/*!
\brief The test can be either the AND of all the component tests,
or the OR of all the component tests.
*/
enum ComboType {
//! Logically "AND" together the results of the tests in this combination
AND,
//! Logically "OR" together the results of the tests in this combination
OR
};
//! Constructor. Optional argument is the error stream for output.
Combo(ComboType t, const NOX::Utils* u = NULL);
//! Constructor with a single test.
Combo(ComboType t, const Teuchos::RCP<Generic>& a,
const NOX::Utils* u = NULL);
//! Constructor with two tests.
Combo(ComboType t, const Teuchos::RCP<Generic>& a,
const Teuchos::RCP<Generic>& b,
const NOX::Utils* u = NULL);
//! Add another test to this combination.
/*!
Calls isSafe() to determine if it is safe to add \c a to the combination.
*/
virtual Combo& addStatusTest(const Teuchos::RCP<Generic>& a);
//! Destructor
virtual ~Combo();
/*!
\brief Tests stopping criterion.
See addOp() and orOp() for details.
*/
virtual StatusType checkStatus(const NOX::Solver::Generic& problem,
NOX::StatusTest::CheckType checkType);
virtual StatusType getStatus() const;
virtual std::ostream& print(std::ostream& stream, int indent = 0) const;
protected:
//! Use this for checkStatus when this is an OR type combo. Updates NOX::StatusTest::Combo::status.
/*!
If there is a combination of NOX::StatusTest::Failed and
NOX::StatusTest::Converged in the tests that are OR'd together,
the value of status for this test is set to the status of the
first test it encounters which is not NOX::Status::Unconvered. The
tests are evaluated in the order that they were added to the
combination.
\note We compute the status of all tests in the combination for
the sake of completeness, even if we could determine the status of
this combination test without that check.
*/
virtual void orOp(const Solver::Generic& problem,
NOX::StatusTest::CheckType checkType);
//! Use this for checkStatus when this is an AND type combo. Updates NOX::StatusTest::Combo::status.
/*!
If any tests are NOX::StatusTest::Unconverged, then the status of
this test is NOX::StatusTest::Unconverged. If there is a
combination of NOX::StatusTest::Failed and
NOX::StatusTest::Converged in the tests that are AND'd together,
the value of status for this test is set to the status of the
first test it encounters. The tests are evaluated in the
order that they were added to the combination.
\note We compute the status of all tests in the combination for
the sake of completeness, even if we could determine the status of
this combination test without that check.
*/
virtual void andOp(const Solver::Generic& problem,
NOX::StatusTest::CheckType checkType);
/*! \brief Check whether or not it is safe to add \c a to this list
of tests.
This is necessary to avoid any infinite recursions
(i.e., a test cannot own a copy of itself).
*/
bool isSafe(Generic& a);
private:
//! Type of test
const ComboType type;
//! Vector of generic status tests
std::vector<Teuchos::RCP<Generic> > tests;
//! %Status
StatusType status;
//! Ostream used to print errors
NOX::Utils utils;
}; // class Combo
} // namespace Status
} // namespace NOX
#endif
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