Teuchos_StandardParameterEntryValidators.hpp

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// @HEADER
// *****************************************************************************
//                    Teuchos: Common Tools Package
//
// Copyright 2004 NTESS and the Teuchos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef TEUCHOS_STANDARD_PARAMETER_ENTRY_VALIDATORS_H
#define TEUCHOS_STANDARD_PARAMETER_ENTRY_VALIDATORS_H

#include "Teuchos_ParameterEntryValidator.hpp"
#include "Teuchos_ParameterList.hpp"
#include "Teuchos_ParameterListExceptions.hpp"
#include "Teuchos_VerbosityLevel.hpp"
#include "Teuchos_TwoDArray.hpp"
#include "Teuchos_Assert.hpp"
#include "Teuchos_StrUtils.hpp"
#include "Teuchos_TypeNameTraits.hpp"
#include "Teuchos_DummyObjectGetter.hpp"

#ifdef HAVE_TEUCHOSCORE_QUADMATH
#  include <quadmath.h> // __float128 constants and functions
#endif // HAVE_TEUCHOSCORE_QUADMATH

#include <locale>


namespace Teuchos {

template<class IntegralType>
class StringToIntegralParameterEntryValidator : public ParameterEntryValidator {
public:

  StringToIntegralParameterEntryValidator (const ArrayView<const std::string>& strings,
                                           const std::string& defaultParameterName,
                                           const bool caseSensitive = true);

  StringToIntegralParameterEntryValidator (const ArrayView<const std::string>& strings,
                                           const ArrayView<const IntegralType>& integralValues,
                                           std::string const& defaultParameterName,
                                           const bool caseSensitive = true);

  StringToIntegralParameterEntryValidator (const ArrayView<const std::string>& strings,
                                           const ArrayView<const std::string>& stringsDocs,
                                           const ArrayView<const IntegralType>& integralValues,
                                           const std::string& defaultParameterName,
                                           const bool caseSensitive = true);


  IntegralType getIntegralValue(
    const std::string &str, const std::string &paramName = "",
    const std::string &sublistName = ""
    ) const;

  IntegralType
  getIntegralValue (const ParameterEntry &entry,
                    const std::string &paramName = "",
                    const std::string &sublistName = "",
                    const bool activeQuery = true) const;

  std::string
  getStringValue (const ParameterEntry &entry,
                  const std::string &paramName = "",
                  const std::string &sublistName = "",
                  const bool activeQuery = true) const;

  IntegralType
  getIntegralValue (ParameterList& paramList,
                    const std::string& paramName,
                    const std::string& defaultValue) const;

  std::string getStringValue(
    ParameterList &paramList, const std::string &paramName,
    const std::string &defaultValue
    ) const;

  ValidStringsList getStringDocs() const;

  const std::string& getDefaultParameterName() const;

  std::string validateString(
    const std::string &str, const std::string &paramName = "",
    const std::string &sublistName = ""
    ) const;

  bool isCaseSensitive () const {
    return caseSensitive_;
  }



  const std::string getXMLTypeName() const;

  void printDoc(
    std::string const& docString,
    std::ostream & out
    ) const;

  ValidStringsList
  validStringValues() const;

  void validate(
    ParameterEntry const& entry,
    std::string const& paramName,
    std::string const& sublistName
    ) const;

#if defined(HAVE_TEUCHOS_MODIFY_DEFAULTS_DURING_VALIDATION)
  void validateAndModify(
    std::string const& paramName,
    std::string const& sublistName,
    ParameterEntry * entry
  ) const;
#endif


private:
  std::string defaultParameterName_;
  std::string validValues_;
  ValidStringsList validStringValues_;
  ValidStringsList validStringValuesDocs_;

  typedef std::map<std::string,IntegralType> map_t;
  map_t map_;
  typedef std::map<IntegralType,std::string> inv_map_t;
  inv_map_t inv_map_;

  const bool caseSensitive_;

  void init(const ArrayView<const std::string>& strings,
            const ArrayView<const IntegralType>& integralValues);

  void setValidValues(
    ArrayView<const std::string> const& strings,
    ArrayView<const std::string> const* stringsDocs = NULL
    );

  // Not defined and not to be called.
  StringToIntegralParameterEntryValidator();

  static std::string upperCase (const std::string s) {
    std::string s_upper = s;
    std::transform (s_upper.begin (), s_upper.end (), s_upper.begin (), ::toupper);
    return s_upper;
  }
};


template<class IntegralType>
RCP<StringToIntegralParameterEntryValidator<IntegralType> >
stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  std::string const& defaultParameterName
  );


template<class IntegralType>
RCP<StringToIntegralParameterEntryValidator<IntegralType> >
stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  std::string const& defaultParameterName,
  const bool caseSensitive
  );


template<class IntegralType>
RCP<StringToIntegralParameterEntryValidator<IntegralType> >
stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  ArrayView<const IntegralType> const& integralValues,
  std::string const& defaultParameterName
  );


template<class IntegralType>
RCP<StringToIntegralParameterEntryValidator<IntegralType> >
stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  ArrayView<const IntegralType> const& integralValues,
  std::string const& defaultParameterName,
  const bool caseSensitive
  );


template<class IntegralType>
RCP<StringToIntegralParameterEntryValidator<IntegralType> >
stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  ArrayView<const std::string> const& stringsDocs,
  ArrayView<const IntegralType> const& integralValues,
  std::string const& defaultParameterName
  );


template<class IntegralType>
RCP<StringToIntegralParameterEntryValidator<IntegralType> >
stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  ArrayView<const std::string> const& stringsDocs,
  ArrayView<const IntegralType> const& integralValues,
  std::string const& defaultParameterName,
  const bool caseSensitive
  );


template<class IntegralType>
void setStringToIntegralParameter(
  std::string const& paramName,
  std::string const& defaultValue,
  std::string const& docString,
  ArrayView<const std::string> const& strings,
  ParameterList * paramList
  );


template<class IntegralType>
void setStringToIntegralParameter(
  std::string const& paramName,
  std::string const& defaultValue,
  std::string const& docString,
  ArrayView<const std::string> const& strings,
  ArrayView<const IntegralType> const& integralValues,
  ParameterList * paramList
  );


template<class IntegralType>
void setStringToIntegralParameter(
  std::string const& paramName,
  std::string const& defaultValue,
  std::string const& docString,
  ArrayView<const std::string> const& strings,
  ArrayView<const std::string> const& stringsDocs,
  ArrayView<const IntegralType> const& integralValues,
  ParameterList * paramList
  );


template<class IntegralType>
IntegralType getIntegralValue(
  ParameterList const& paramList, std::string const& paramName
  );


template<class IntegralType>
std::string getStringValue(
  ParameterList const& paramList, std::string const& paramName
  );


template<class IntegralType>
RCP<const StringToIntegralParameterEntryValidator<IntegralType> >
getStringToIntegralParameterEntryValidator(
  ParameterEntry const& entry, ParameterList const& paramList,
  std::string const& paramName
  );


std::string getVerbosityLevelParameterValueName(
  const EVerbosityLevel verbLevel
  );


RCP<StringToIntegralParameterEntryValidator<EVerbosityLevel> >
verbosityLevelParameterEntryValidator(std::string const& defaultParameterName);

template<class IntegralType>
class DummyObjectGetter<StringToIntegralParameterEntryValidator<IntegralType> >{

public:


  static RCP<StringToIntegralParameterEntryValidator<IntegralType> >
    getDummyObject();

};

template<class IntegralType>
RCP<StringToIntegralParameterEntryValidator<IntegralType> >
  DummyObjectGetter<StringToIntegralParameterEntryValidator<IntegralType> >::getDummyObject()
{
  return stringToIntegralParameterEntryValidator<IntegralType>(
    tuple<std::string>(""), tuple<std::string>(""),
    tuple<IntegralType>((IntegralType)1), "");
}

class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT BoolParameterEntryValidator
 : public ParameterEntryValidator
{
public:


  BoolParameterEntryValidator();



  bool getBool(
    const ParameterEntry &entry, const std::string &paramName = "",
    const std::string &sublistName = "", const bool activeQuery = true
    ) const;

  bool getBool(
    ParameterList &paramList, const std::string &paramName,
    const int defaultValue
    ) const;



  const std::string getXMLTypeName() const;

  void printDoc(
    std::string const& docString,
    std::ostream & out
    ) const;

  ValidStringsList
  validStringValues() const;

  void validate(
    ParameterEntry const& entry,
    std::string const& paramName,
    std::string const& sublistName
    ) const;

  void validateAndModify(
    std::string const& paramName,
    std::string const& sublistName,
    ParameterEntry * entry
    ) const;


private:

  // ////////////////////////////
  // Private data members

  std::string acceptedTypesString_;

  // ////////////////////////////
  // Private member functions

  void finishInitialization();

  void throwTypeError(
    ParameterEntry const& entry,
    std::string const& paramName,
    std::string const& sublistName
    ) const;
};

// Nonmember helper functions


TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT RCP<BoolParameterEntryValidator>
boolParameterEntryValidator();


class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT AnyNumberParameterEntryValidator
 : public ParameterEntryValidator
{
public:


  enum EPreferredType { PREFER_INT, PREFER_LONG_LONG, PREFER_DOUBLE, PREFER_STRING };


  class AcceptedTypes {
  public:
    AcceptedTypes( bool allowAllTypesByDefault = true )
      :allowInt_(allowAllTypesByDefault)
      ,allowLongLong_(allowAllTypesByDefault)
      ,allowDouble_(allowAllTypesByDefault)
      ,allowString_(allowAllTypesByDefault)
      {}
    AcceptedTypes& allowInt( bool _allowInt )
      { allowInt_ = _allowInt; return *this; }
    AcceptedTypes& allowLongLong( bool _allowLongLong )
      { allowLongLong_ = _allowLongLong; return *this; }
    AcceptedTypes& allowDouble( bool _allowDouble )
      { allowDouble_ = _allowDouble; return *this; }
    AcceptedTypes& allowString( bool _allowString )
      { allowString_ = _allowString; return *this; }
    bool allowInt() const { return allowInt_; }
    bool allowLongLong() const { return allowLongLong_; }
    bool allowDouble() const { return allowDouble_; }
    bool allowString() const { return allowString_; }
  private:
    bool  allowInt_;
    bool  allowLongLong_;
    bool  allowDouble_;
    bool  allowString_;
  };



  AnyNumberParameterEntryValidator();

  AnyNumberParameterEntryValidator(
    EPreferredType const preferredType,
    AcceptedTypes const& acceptedTypes
    );



  int getInt(
    const ParameterEntry &entry, const std::string &paramName = "",
    const std::string &sublistName = "", const bool activeQuery = true
    ) const;

  long long getLongLong(
    const ParameterEntry &entry, const std::string &paramName = "",
    const std::string &sublistName = "", const bool activeQuery = true
    ) const;

  double getDouble(
    const ParameterEntry &entry, const std::string &paramName = "",
    const std::string &sublistName = "", const bool activeQuery = true
    ) const;

  std::string getString(
    const ParameterEntry &entry, const std::string &paramName = "",
    const std::string &sublistName = "", const bool activeQuery = true
    ) const;

  int getInt(
    ParameterList &paramList, const std::string &paramName,
    const int defaultValue
    ) const;

  long long getLongLong(
    ParameterList &paramList, const std::string &paramName,
    const long long defaultValue
    ) const;

  double getDouble(
    ParameterList &paramList, const std::string &paramName,
    const double defaultValue
    ) const;

  std::string getString(
    ParameterList &paramList, const std::string &paramName,
    const std::string &defaultValue
    ) const;

  bool isIntAllowed() const;

  bool isLongLongAllowed() const;

  bool isDoubleAllowed() const;

  bool isStringAllowed() const;

  EPreferredType getPreferredType() const;

  static const std::string& getPrefferedTypeString (EPreferredType enumValue)
  {
    switch (enumValue) {
      case PREFER_INT:
        return getIntEnumString ();
      case PREFER_LONG_LONG:
        return getLongLongEnumString ();
      case PREFER_DOUBLE:
        return getDoubleEnumString ();
      case PREFER_STRING:
        return getStringEnumString ();
      default:
        const std::string typeString (toString (enumValue));
        throw std::runtime_error("Cannot convert enumValue: " + typeString + " to a string");
    }
  }

  static EPreferredType getPrefferedTypeStringEnum (const std::string& enumString)
  {
    if (enumString == getIntEnumString ()) {
      return PREFER_INT;
    }
    else if (enumString == getLongLongEnumString ()) {
      return PREFER_LONG_LONG;
    }
    else if (enumString == getDoubleEnumString ()) {
      return PREFER_DOUBLE;
    }
    else if (enumString == getStringEnumString ()) {
      return PREFER_STRING;
    }
    else {
      throw std::runtime_error ("Cannot convert enumString: " + enumString + " to an enum");
    }
  }



  const std::string getXMLTypeName() const;

  void printDoc(
    std::string const& docString,
    std::ostream & out
    ) const;

  ValidStringsList
  validStringValues() const;

  void validate(
    ParameterEntry const& entry,
    std::string const& paramName,
    std::string const& sublistName
    ) const;

  void validateAndModify(
    std::string const& paramName,
    std::string const& sublistName,
    ParameterEntry * entry
    ) const;



private:

  // ////////////////////////////
  // Private data members

  EPreferredType preferredType_;
  std::string acceptedTypesString_;

//use pragmas to disable some false-positive warnings for windows sharedlibs export
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable:4251)
#endif
  const AcceptedTypes acceptedTypes_;
#ifdef _MSC_VER
#pragma warning(pop)
#endif

  // ////////////////////////////
  // Private member functions

  /* \brief Gets the string representing the "int" preferred type enum */
  static const std::string& getIntEnumString(){
    static const std::string intEnumString_ = TypeNameTraits<int>::name();
    return intEnumString_;
  }

  /* \brief Gets the string representing the "int" preferred type enum */
  static const std::string& getLongLongEnumString(){
    static const std::string longLongEnumString_ = TypeNameTraits<long long>::name();
    return longLongEnumString_;
  }

  /* \brief Gets the string representing the "double" preferred type enum */
  static const std::string& getDoubleEnumString(){
    static const std::string doubleEnumString_ = TypeNameTraits<double>::name();
    return doubleEnumString_;
  }

  /* \brief Gets the string representing the "string" preferred type enum */
  static const std::string& getStringEnumString(){
    static const std::string stringEnumString_ = TypeNameTraits<std::string>::name();
    return stringEnumString_;
  }


  void finishInitialization();

  void throwTypeError(
    ParameterEntry const& entry,
    std::string const& paramName,
    std::string const& sublistName
    ) const;

};


// Nonmember helper functions


TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT RCP<AnyNumberParameterEntryValidator>
anyNumberParameterEntryValidator();


TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT RCP<AnyNumberParameterEntryValidator>
anyNumberParameterEntryValidator(
  AnyNumberParameterEntryValidator::EPreferredType const preferredType,
  AnyNumberParameterEntryValidator::AcceptedTypes const& acceptedTypes
  );

TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT void setIntParameter(
  std::string const& paramName,
  int const value, std::string const& docString,
  ParameterList *paramList,
  AnyNumberParameterEntryValidator::AcceptedTypes const& acceptedTypes
  = AnyNumberParameterEntryValidator::AcceptedTypes()
  );


TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT void setLongLongParameter(
  std::string const& paramName,
  long long const value, std::string const& docString,
  ParameterList *paramList,
  AnyNumberParameterEntryValidator::AcceptedTypes const& acceptedTypes
  = AnyNumberParameterEntryValidator::AcceptedTypes()
  );

TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT void setDoubleParameter(
  std::string const& paramName,
  double const& value, std::string const& docString,
  ParameterList *paramList,
  AnyNumberParameterEntryValidator::AcceptedTypes const& acceptedTypes
  = AnyNumberParameterEntryValidator::AcceptedTypes()
  );


TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT void setNumericStringParameter(
  std::string const& paramName,
  std::string const& value, std::string const& docString,
  ParameterList *paramList,
  AnyNumberParameterEntryValidator::AcceptedTypes const& acceptedTypes
  = AnyNumberParameterEntryValidator::AcceptedTypes()
  );


TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT int getIntParameter(
  ParameterList const& paramList, std::string const& paramName
  );


TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT long long getLongLongParameter(
  ParameterList const& paramList, std::string const& paramName
  );

TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT double getDoubleParameter(
  ParameterList const& paramList,
  std::string const& paramName
  );


TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT std::string getNumericStringParameter(
  ParameterList const& paramList,
  std::string const& paramName
  );

template<>
class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT DummyObjectGetter<AnyNumberParameterEntryValidator>{

public:


  static RCP<AnyNumberParameterEntryValidator > getDummyObject();


};


template <class T>
struct UndefinedEnhancedNumberTraits{
  static inline T notDefined() {
    return T::this_type_is_missing_a_specialization();
  }
};


template <class T>
class EnhancedNumberTraits{
public:

  static inline T min()
    { return UndefinedEnhancedNumberTraits<T>::notDefined(); }

  static inline T max()
    { return UndefinedEnhancedNumberTraits<T>::notDefined(); }

  static inline T defaultStep()
    { return UndefinedEnhancedNumberTraits<T>::notDefined(); }

  static inline unsigned short defaultPrecision()
     { return UndefinedEnhancedNumberTraits<T>::notDefined(); }

};


template<>
class EnhancedNumberTraits<short int>{
public:
  static inline short int min() { return std::numeric_limits<short int>::min(); }
  static inline short int max() { return std::numeric_limits<short int>::max(); }
  static inline short int defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 0; }
};


template<>
class EnhancedNumberTraits<short unsigned int>{
public:
  static inline short unsigned int min() { return std::numeric_limits<short unsigned int>::min(); }
  static inline short unsigned int max() { return std::numeric_limits<short unsigned int>::max(); }
  static inline short unsigned int defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 0; }
};


template<>
class EnhancedNumberTraits<int>{
public:
  static inline int min() { return std::numeric_limits<int>::min(); }
  static inline int max() { return std::numeric_limits<int>::max(); }
  static inline int defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 0; }
};


template<>
class EnhancedNumberTraits<unsigned int>{
public:
  static inline unsigned int min() { return std::numeric_limits<unsigned int>::min(); }
  static inline unsigned int max() { return std::numeric_limits<unsigned int>::max(); }
  static inline unsigned int defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 0; }
};


template<>
class EnhancedNumberTraits<long int>{
public:
  static inline long int min() { return std::numeric_limits<long int>::min(); }
  static inline long int max() { return std::numeric_limits<long int>::max(); }
  static inline long int defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 0; }
};


template<>
class EnhancedNumberTraits<long unsigned int>{
public:
  static inline long unsigned int min() { return std::numeric_limits<long unsigned int>::min(); }
  static inline long unsigned int max() { return std::numeric_limits<long unsigned int>::max(); }
  static inline long unsigned int defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 0; }
};


template<>
class EnhancedNumberTraits<long long int>{
public:
  static inline long long int min() { return std::numeric_limits<long long int>::min(); }
  static inline long long int max() { return std::numeric_limits<long long int>::max(); }
  static inline long long int defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 0; }
};


template<>
class EnhancedNumberTraits<long long unsigned int>{
public:
  static inline long long unsigned int min() { return std::numeric_limits<long long unsigned int>::min(); }
  static inline long long unsigned int max() { return std::numeric_limits<long long unsigned int>::max(); }
  static inline long long unsigned int defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 0; }
};


#ifdef HAVE_TEUCHOSCORE_QUADMATH
template<>
class EnhancedNumberTraits<__float128>{
public:
  static inline __float128 min() { return -std::numeric_limits<__float128>::max(); }
  static inline __float128 max() { return std::numeric_limits<__float128>::max(); }
  static inline __float128 defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 100; }
};
#endif // HAVE_TEUCHOSCORE_QUADMATH

template<>
class EnhancedNumberTraits<double>{
public:
  static inline double min() { return -std::numeric_limits<double>::max(); }
  static inline double max() { return std::numeric_limits<double>::max(); }
  static inline double defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 100; }
};

#ifdef HAVE_TEUCHOS_LONG_DOUBLE
template<>
class EnhancedNumberTraits<long double>{
public:
  static inline long double min() { return -std::numeric_limits<long double>::max(); }
  static inline long double max() { return std::numeric_limits<long double>::max(); }
  static inline long double defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 100; }
};
#endif

template<>
class EnhancedNumberTraits<float>{
public:
  static inline float min() { return -std::numeric_limits<float>::max(); }
  static inline float max() { return std::numeric_limits<float>::max(); }
  static inline float defaultStep() { return 1; }
  static inline unsigned short defaultPrecision() { return 100; }
};

template <class T>
class EnhancedNumberValidator : public ParameterEntryValidator{

public:


  EnhancedNumberValidator(
    T min,
    T max,
    T step=EnhancedNumberTraits<T>::defaultStep(),
    unsigned short precision=EnhancedNumberTraits<T>::defaultPrecision()):
    ParameterEntryValidator(),
    minVal(min), maxVal(max), step_(step), precision_(precision),
    containsMin(true), containsMax(true){}

  EnhancedNumberValidator():
    ParameterEntryValidator(),
    minVal(EnhancedNumberTraits<T>::min()),
    maxVal(EnhancedNumberTraits<T>::max()),
    step_(EnhancedNumberTraits<T>::defaultStep()),
    precision_(EnhancedNumberTraits<T>::defaultPrecision()),
    containsMin(false),
    containsMax(false){}




  void setMin(T min){
    minVal = min;
    containsMin = true;
  }

  void setMax(T max){
    maxVal = max;
    containsMax = true;
  }

  void setStep(T step){
    step_ = step;
  }

  void setPrecision(unsigned short precision){
    precision_ = precision;
  }



  T getMin() const{
    return minVal;
  }

  T getMax() const{
    return maxVal;
  }

  T getStep() const{
    return step_;
  }

  unsigned short getPrecision() const{
    return precision_;
  }




  bool hasMin() const{
    return containsMin;
  }

  bool hasMax() const{
    return containsMax;
  }



  ValidStringsList validStringValues() const{
    return null;
  }

  void validate(ParameterEntry const &entry, std::string const &paramName,
    std::string const &sublistName) const;

  void validateAndModify( std::string const& paramName,
    std::string const& sublistName, ParameterEntry * entry) const;

  Teuchos::any getNumberFromString(const ParameterEntry &entry,
    const bool activeQuery) const;

  const std::string getXMLTypeName() const{
    return  "EnhancedNumberValidator(" + TypeNameTraits<T>::name()+ ")";
  }

  void printDoc(std::string const &docString, std::ostream &out) const{
    StrUtils::printLines(out,"# ",docString);
    out << "#\tValidator Used: " << std::endl;
    out << "#\t\tNumber Validator" << std::endl;
    out << "#\t\tType: " << Teuchos::TypeNameTraits<T>::name() <<
      std::endl;
    out << "#\t\tMin (inclusive): " << minVal << std::endl;
    out << "#\t\tMax (inclusive): " << maxVal << std::endl;
  }


private:

  // note this was discussed in issue #612
  // currently we are keeping a string validator with EnhancedNumberValidator
  // an alternative is to make a combined class for AnyNumberParameterEntryValidator
  // and EnhancedNumberValidator
  bool useIntConversions() const;



  T minVal;

  T maxVal;

  T step_;

  unsigned short precision_;

  bool containsMin;

  bool containsMax;


};

template<class T>
void EnhancedNumberValidator<T>::validateAndModify(
  std::string const& paramName,
  std::string const& sublistName,
  ParameterEntry * entry
  ) const
{
  TEUCHOS_TEST_FOR_EXCEPT(0==entry);

  any anyValue = entry->getAny(true);
  // preferred type is not string
  if( anyValue.type() == typeid(std::string) ) {
    anyValue = getNumberFromString(*entry,false);
    entry->setValue(
      any_cast<T>(anyValue),
      false // isDefault
    );
  }
  else {
    // default behavior
    return ParameterEntryValidator::validateAndModify(
      paramName, sublistName, entry);
  }
}

template<class T>
bool EnhancedNumberValidator<T>::useIntConversions() const
{
  // this will need some rethinking and exists only for supporting
  // conversion of strings to the templated type T
  // but we may want to unify this into the base class anyways
  // and share string conversion concepts with other parameters
  // like AnyNumberParameterEntryValidator
  if(typeid(T) == typeid(char))               return true;
  if(typeid(T) == typeid(unsigned char))      return true;
  if(typeid(T) == typeid(int))                return true;
  if(typeid(T) == typeid(unsigned int))       return true;
  if(typeid(T) == typeid(short))              return true;
  if(typeid(T) == typeid(unsigned short))     return true;
  if(typeid(T) == typeid(long))               return true;
  if(typeid(T) == typeid(unsigned long))      return true;
  if(typeid(T) == typeid(long long))          return true;
  if(typeid(T) == typeid(unsigned long long)) return true;

  // default to double stod to older atof conversion
  // depending on HAVE_TEUCHOSCORE_CXX11
  // those conversions would probably handle all above discrete types anyways
  return false;
}

template<class T>
Teuchos::any EnhancedNumberValidator<T>::getNumberFromString(
  const ParameterEntry &entry, const bool activeQuery
  ) const
{
  // perhaps we want to just eliminate the int checks
  // and always use double conversion which I think would work
  // well for all types - but this will give us a behavior which mirrors
  // AnyNumberParameterEntryValidator more closely
  const any &anyValue = entry.getAny(activeQuery);
  if(useIntConversions()) {
    return any((T)convertStringToInt(any_cast<std::string>(anyValue)));
  }
  else { // if not discrete, read as a double and cast to our type T
    return any((T)convertStringToDouble(any_cast<std::string>(anyValue)));
  }
}

template<class T>
void EnhancedNumberValidator<T>::validate(ParameterEntry const &entry, std::string const &paramName,
  std::string const &sublistName) const
{
  any anyValue = entry.getAny(true);

  // This was new code added to allow EnhancedNumberValidator to accept a string
  // This was added for consistency with AnyNumberParameterEntryValidator
  // and the new BoolParameterEntryValidator which all take string
  // We may wish to change this to be optional like AnyNumberParameterEntryValidator
  if( anyValue.type() == typeid(std::string) ) {
    // try to upgrade from a string to a number
    anyValue = getNumberFromString(entry, false);
  }

  const std::string &entryName = entry.getAny(false).typeName();
  TEUCHOS_TEST_FOR_EXCEPTION(anyValue.type() != typeid(T),
    Exceptions::InvalidParameterType,
    "The \"" << paramName << "\"" <<
    " parameter in the \"" << sublistName <<
    "\" sublist is has an error." << std::endl << std::endl <<
    "Error: The value that you entered was the wrong type." << std::endl <<
    "Parameter: " << paramName << std::endl <<
    "Type specified: " << entryName << std::endl <<
    "Type accepted: " << Teuchos::TypeNameTraits<T>::name() << std::endl);

  bool isValueInRange;
  any_cast<T>(anyValue) >= minVal && any_cast<T>(anyValue) <= maxVal
    ? isValueInRange = true : isValueInRange=false;
  TEUCHOS_TEST_FOR_EXCEPTION(!(isValueInRange),
    Exceptions::InvalidParameterValue,
    "The \"" << paramName << "\"" <<
    " parameter in the \"" << sublistName <<
    "\" sublist is has an error." << std::endl << std::endl <<
    "Error: The value that was entered doesn't fall with in " <<
    "the range set by the validator" << std::endl <<
    "Parameter: " << paramName  << std::endl <<
    "Min: " << minVal << std::endl <<
    "Max: " << maxVal << std::endl <<
    "Value entered: " <<
    (any_cast<T>(anyValue)) << std::endl << std::endl);
}

template<class T>
class DummyObjectGetter<EnhancedNumberValidator<T> >{

public:


  static RCP<EnhancedNumberValidator<T> > getDummyObject();

};

template<class T>
RCP<EnhancedNumberValidator<T> >
  DummyObjectGetter<EnhancedNumberValidator<T> >::getDummyObject()
{
  return rcp(new EnhancedNumberValidator<T>);
}

class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT FileNameValidator : public ParameterEntryValidator {

public:


  static bool mustAlreadyExistDefault() { return false; }



  FileNameValidator(bool mustAlreadyExist = mustAlreadyExistDefault());




  bool fileMustExist() const;



  bool fileEmptyNameOK() const;




  bool setFileMustExist(bool shouldFileExist);

  bool setFileEmptyNameOK(bool isEmptyNameOK);



  ValidStringsList validStringValues() const;

  void validate(
    ParameterEntry const &entry,
    std::string const &paramName,
    std::string const &sublistName) const;

  const std::string getXMLTypeName() const;

  void printDoc(std::string const &docString, std::ostream &out) const;


private:


  bool mustAlreadyExist_;
  bool EmptyNameOK_;


};

template<>
class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT DummyObjectGetter<FileNameValidator>{

public:


  static RCP<FileNameValidator> getDummyObject();


};

class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT StringValidator : public ParameterEntryValidator {

public:


  StringValidator();

  StringValidator(const Teuchos::Array<std::string> &validStrings, bool caseSensitive=true);




  ValidStringsList setValidStrings(
    const Teuchos::Array<std::string> &validStrings);

  bool isCaseSensitive () const {
    return caseSensitive_;
  }



  ValidStringsList validStringValues() const;

  void validate(ParameterEntry const &entry, std::string const &paramName,
    std::string const &sublistName) const;

  const std::string getXMLTypeName() const;

  void printDoc(std::string const &docString, std::ostream &out) const;


private:


  ValidStringsList validStrings_;

  bool caseSensitive_;

  static std::string upperCase (const std::string s) {
    std::string s_upper = s;
    std::transform (s_upper.begin (), s_upper.end (), s_upper.begin (), ::toupper);
    return s_upper;
  }


};

template<>
class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT DummyObjectGetter<StringValidator>{

public:


  static RCP<StringValidator> getDummyObject();


};


template<class ValidatorType, class EntryType>
class AbstractArrayValidator : public ParameterEntryValidator {

public:


  AbstractArrayValidator(RCP<const ValidatorType> prototypeValidator):
    ParameterEntryValidator(),
    prototypeValidator_(prototypeValidator){}



  RCP<const ValidatorType> getPrototype() const{
    return prototypeValidator_;
  }



  ValidStringsList validStringValues() const {
    return prototypeValidator_->validStringValues();
  }


private:


  RCP<const ValidatorType> prototypeValidator_;

  AbstractArrayValidator();


};

template<class ValidatorType, class EntryType>
class TwoDArrayValidator : public AbstractArrayValidator<ValidatorType, EntryType>{
public:

  TwoDArrayValidator(RCP<const ValidatorType> prototypeValidator):
    AbstractArrayValidator<ValidatorType, EntryType>(prototypeValidator){}



  virtual void validate(ParameterEntry const &entry, std::string const &paramName,
    std::string const &sublistName) const;

  const std::string getXMLTypeName() const{
    return "TwoDArrayValidator(" +
      this->getPrototype()->getXMLTypeName() + ", " +
      TypeNameTraits<EntryType>::name() + ")";
  }

  virtual void printDoc(std::string const &docString, std::ostream &out) const
  {
    StrUtils::printLines(out,"# ",docString);
    std::string toPrint;
    toPrint += "TwoDArrayValidator:\n";
    toPrint += "Prototype Validator:\n";
    this->getPrototype()->printDoc(toPrint, out);
  }


};

template<class ValidatorType, class EntryType>
void TwoDArrayValidator<ValidatorType, EntryType>::validate(ParameterEntry const &entry, std::string const &paramName,
  std::string const &sublistName) const
{
  any anyValue = entry.getAny(true);
  const std::string &entryName = entry.getAny(false).typeName();
  TEUCHOS_TEST_FOR_EXCEPTION(anyValue.type() != typeid(TwoDArray<EntryType>),
    Exceptions::InvalidParameterType,
    "The \"" << paramName << "\"" <<
    " parameter in the \"" << sublistName <<
    "\" sublist is has an error." << std::endl << std::endl <<
    "Error: The value you entered was the wrong type." << std::endl <<
    "Parameter: " << paramName << std::endl <<
    "Type specified: " << entryName << std::endl <<
    "Type accepted: " << TypeNameTraits<TwoDArray<EntryType> >::name() <<
    std::endl << std::endl);

  TwoDArray<EntryType> extracted =
    getValue<Teuchos::TwoDArray<EntryType> >(entry);
  RCP<const ParameterEntryValidator> prototype = this->getPrototype();
  for(int i = 0; i<extracted.getNumRows(); ++i){
    for(int j = 0; j<extracted.getNumCols(); ++j){
      ParameterEntry dummyParameter;
      dummyParameter.setValue(extracted(i,j));
      try{
        prototype->validate(
          dummyParameter, paramName, sublistName);
      }
      catch(Exceptions::InvalidParameterValue& e){
        std::stringstream oss;
        oss << "TwoDArray Validator Exception:" << std::endl <<
        "Bad Index: (" << i << "," << j << ")" << std::endl << e.what();
        throw Exceptions::InvalidParameterValue(oss.str());
      }
    }
  }
}


template<class ValidatorType, class EntryType>
class DummyObjectGetter<TwoDArrayValidator<ValidatorType, EntryType> >{

public:


  static RCP<TwoDArrayValidator<ValidatorType, EntryType> > getDummyObject();


};

template<class ValidatorType, class EntryType>
RCP<TwoDArrayValidator<ValidatorType, EntryType> >
  DummyObjectGetter<TwoDArrayValidator<ValidatorType, EntryType> >::getDummyObject()
{
  return rcp(new TwoDArrayValidator<ValidatorType, EntryType>(
    DummyObjectGetter<ValidatorType>::getDummyObject()));
}

class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT TwoDArrayStringValidator :
  public TwoDArrayValidator<StringValidator, std::string>{

public:


  TwoDArrayStringValidator(RCP<const StringValidator> prototypeValidator):
    TwoDArrayValidator<StringValidator, std::string>(prototypeValidator){}


};


class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT TwoDArrayFileNameValidator :
  public TwoDArrayValidator<FileNameValidator, std::string>{

public:


  TwoDArrayFileNameValidator(RCP<const FileNameValidator> prototypeValidator):
    TwoDArrayValidator<FileNameValidator, std::string>(prototypeValidator){}


};


template<class T>
class TwoDArrayNumberValidator : public TwoDArrayValidator<EnhancedNumberValidator<T>, T>{
public:

  TwoDArrayNumberValidator(
    RCP<const EnhancedNumberValidator<T> > prototypeValidator):
    TwoDArrayValidator<EnhancedNumberValidator<T>, T>(prototypeValidator){}


};


template<class ValidatorType, class EntryType>
class ArrayValidator : public AbstractArrayValidator<ValidatorType, EntryType>{

public:


  ArrayValidator(RCP<const ValidatorType> prototypeValidator):
    AbstractArrayValidator<ValidatorType, EntryType>(prototypeValidator){}



  virtual void validate(ParameterEntry const &entry, std::string const &paramName,
    std::string const &sublistName) const;

  const std::string getXMLTypeName() const{
    return "ArrayValidator(" +
      this->getPrototype()->getXMLTypeName() + ", " +
      TypeNameTraits<EntryType>::name() + ")";
  }

  virtual void printDoc(std::string const &docString, std::ostream &out) const
  {
    StrUtils::printLines(out,"# ",docString);
    std::string toPrint;
    toPrint += "ArrayValidator:\n";
    toPrint += "Prototype Validator:\n";
    this->getPrototype()->printDoc(toPrint, out);
  }


};

template<class ValidatorType, class EntryType>
void ArrayValidator<ValidatorType, EntryType>::validate(ParameterEntry const &entry, std::string const &paramName,
  std::string const &sublistName) const
{
  any anyValue = entry.getAny(true);
  const std::string &entryName = entry.getAny(false).typeName();
  TEUCHOS_TEST_FOR_EXCEPTION(anyValue.type() != typeid(Array<EntryType>),
    Exceptions::InvalidParameterType,
    "The \"" << paramName << "\"" <<
    " parameter in the \"" << sublistName <<
    "\" sublist is has an error." << std::endl << std::endl <<
    "Error: The value you entered was the wrong type." << std::endl <<
    "Parameter: " << paramName << std::endl <<
    "Type specified: " << entryName << std::endl <<
    "Type accepted: " << TypeNameTraits<Array<EntryType> >::name() <<
    std::endl << std::endl);

  Array<EntryType> extracted =
    getValue<Teuchos::Array<EntryType> >(entry);
  RCP<const ParameterEntryValidator> prototype = this->getPrototype();
  for(int i = 0; i<extracted.size(); ++i){
    ParameterEntry dummyParameter;
    dummyParameter.setValue(extracted[i]);
    try{
      prototype->validate(
        dummyParameter, paramName, sublistName);
    }
    catch(Exceptions::InvalidParameterValue& e){
      std::stringstream oss;
      oss << "Array Validator Exception:" << std::endl <<
      "Bad Index: " << i << std::endl << e.what();
      throw Exceptions::InvalidParameterValue(oss.str());
    }
  }
}

template<class ValidatorType, class EntryType>
class DummyObjectGetter<ArrayValidator<ValidatorType, EntryType> >{

public:


  static RCP<ArrayValidator<ValidatorType, EntryType> > getDummyObject();


};

template<class ValidatorType, class EntryType>
RCP<ArrayValidator<ValidatorType, EntryType> >
  DummyObjectGetter<ArrayValidator<ValidatorType, EntryType> >::getDummyObject()
{
  return rcp(new ArrayValidator<ValidatorType, EntryType>(
    DummyObjectGetter<ValidatorType>::getDummyObject()));
}


class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT ArrayStringValidator :
  public ArrayValidator<StringValidator, std::string>{

public:


  ArrayStringValidator(RCP<const StringValidator> prototypeValidator):
    ArrayValidator<StringValidator, std::string>(prototypeValidator){}


};


class TEUCHOSPARAMETERLIST_LIB_DLL_EXPORT ArrayFileNameValidator : public ArrayValidator<FileNameValidator, std::string>{

public:


  ArrayFileNameValidator(RCP<const FileNameValidator> prototypeValidator):
    ArrayValidator<FileNameValidator, std::string>(prototypeValidator){}


};


template<class T>
class ArrayNumberValidator : public ArrayValidator<EnhancedNumberValidator<T>, T>{
public:

  ArrayNumberValidator(
    RCP<const EnhancedNumberValidator<T> > prototypeValidator):
    ArrayValidator<EnhancedNumberValidator<T>, T>(prototypeValidator){}


};



// ///////////////////////////
// Implementations


//
// StringToIntegralParameterEntryValidator
//


// Constructors


template<class IntegralType>
StringToIntegralParameterEntryValidator<IntegralType>::
StringToIntegralParameterEntryValidator (ArrayView<const std::string> const& strings,
                                         std::string const& defaultParameterName,
                                         const bool caseSensitive) :
  ParameterEntryValidator (),
  defaultParameterName_ (defaultParameterName),
  caseSensitive_ (caseSensitive)
{
  const int length = static_cast<int>(strings.size());
  Array<IntegralType> integralValues(length);
  for (int i = 0; i < length; ++i) integralValues[i] = static_cast<IntegralType>(i);
  init(strings, integralValues);
  setValidValues (strings);
}


template<class IntegralType>
StringToIntegralParameterEntryValidator<IntegralType>::
StringToIntegralParameterEntryValidator (ArrayView<const std::string> const& strings,
                                         ArrayView<const IntegralType> const& integralValues,
                                         std::string const& defaultParameterName,
                                         const bool caseSensitive) :
  ParameterEntryValidator (),
  defaultParameterName_ (defaultParameterName),
  caseSensitive_ (caseSensitive)
{
#ifdef TEUCHOS_DEBUG
  TEUCHOS_ASSERT_EQUALITY( strings.size(), integralValues.size() );
#endif
  init(strings, integralValues);
  setValidValues (strings);
}

template<class IntegralType>
StringToIntegralParameterEntryValidator<IntegralType>::
StringToIntegralParameterEntryValidator (ArrayView<const std::string>    const& strings,
                                         ArrayView<const std::string>   const& stringsDocs,
                                         ArrayView<const IntegralType>  const& integralValues,
                                         std::string          const& defaultParameterName,
                                         const bool caseSensitive) :
  ParameterEntryValidator (),
  defaultParameterName_ (defaultParameterName),
  caseSensitive_ (caseSensitive)
{
#ifdef TEUCHOS_DEBUG
  TEUCHOS_ASSERT_EQUALITY( strings.size(), stringsDocs.size() );
#endif

  TEUCHOS_TEST_FOR_EXCEPTION(
    strings.size() != stringsDocs.size(),
    std::logic_error,
    "The input arrays strings and stringsDocs must have the same length.");

  init(strings, integralValues);
  setValidValues(strings,&stringsDocs);
}

template <class IntegralType>
void StringToIntegralParameterEntryValidator<IntegralType>::init(
    ArrayView<const std::string> const &strings,
    ArrayView<const IntegralType> const &integralValues) {

#ifdef TEUCHOS_DEBUG
  TEUCHOS_ASSERT_EQUALITY(strings.size(), integralValues.size());
#endif

  TEUCHOS_TEST_FOR_EXCEPTION(
      strings.size() != integralValues.size(), std::logic_error,
      "The input arrays strings and integralValues must have the same length.");

  typedef typename map_t::value_type val_t;
  typedef typename inv_map_t::value_type inv_val_t;
  for (int i = 0; i < static_cast<int>(strings.size()); ++i) {
    const std::string name =
        caseSensitive_ ? strings[i] : upperCase(strings[i]);
    const bool unique = map_.insert(val_t(name, integralValues[i])).second;
    TEUCHOS_TEST_FOR_EXCEPTION(!unique, std::logic_error,
                               "For parameter \"" << defaultParameterName_
                                                  << "\": "
                                                     "strings["
                                                  << i << "] = \"" << strings[i]
                                                  << "\" is a duplicate.");
    inv_map_.insert(inv_val_t(integralValues[i], name));
  }
}

// Lookup functions


template<class IntegralType>
IntegralType
StringToIntegralParameterEntryValidator<IntegralType>::getIntegralValue(
  const std::string &str, const std::string &paramName
  ,const std::string &sublistName
  ) const
{
  typename map_t::const_iterator itr = map_.find (caseSensitive_ ? str : upperCase (str));
  TEUCHOS_TEST_FOR_EXCEPTION_PURE_MSG(
    itr == map_.end(), Exceptions::InvalidParameterValue
    ,"Error, the value \"" << str << "\" is not recognized for the parameter \""
    << ( paramName.length() ? paramName : defaultParameterName_ ) << "\""
    << "\nin the sublist \"" << sublistName << "\"."
    << "\n\nValid values include:"
    << "\n  {\n"
    << validValues_
    << "  }"
    );
  return (*itr).second;
}


template<class IntegralType>
IntegralType
StringToIntegralParameterEntryValidator<IntegralType>::getIntegralValue(
  const ParameterEntry &entry, const std::string &paramName
  ,const std::string &sublistName, const bool activeQuery
  ) const
{
  if (entry.isType<IntegralType>()){
    return any_cast<IntegralType>(entry.getAny(activeQuery));
  } else{
    const bool validType = ( entry.getAny(activeQuery).type() == typeid(std::string) );
    TEUCHOS_TEST_FOR_EXCEPTION_PURE_MSG(
      !validType, Exceptions::InvalidParameterType
      ,"Error, the parameter {paramName=\""<<(paramName.length()?paramName:defaultParameterName_)
      << "\",type=\""<<entry.getAny(activeQuery).typeName()<<"\"}"
      << "\nin the sublist \"" << sublistName << "\""
      << "\nhas the wrong type."
      << "\n\nThe correct type is \"string\"!"
      );
    const std::string
      &strValue = any_cast<std::string>(entry.getAny(activeQuery)); // This cast should not fail!
    return getIntegralValue(strValue,paramName,sublistName); // This will validate the value and throw!
  }
}


template<class IntegralType>
std::string
StringToIntegralParameterEntryValidator<IntegralType>::getStringValue(
  const ParameterEntry &entry, const std::string &paramName
  ,const std::string &sublistName, const bool activeQuery
  ) const
{
  if (entry.isType<IntegralType>()){
    const IntegralType intVal = any_cast<IntegralType>(entry.getAny(activeQuery));
    typename inv_map_t::const_iterator itr = inv_map_.find(intVal);
    // typename inv_map_t::const_iterator itr = inv_map_.find(intVal);
    // TODO: Maybe do a test on intVal but it should be valid by construction
    return (*itr).second;
  } else{
    // Validate the parameter's type and value
    this->getIntegralValue(entry,paramName,sublistName,activeQuery);
    // Return the std::string value which is now validated!
    return any_cast<std::string>(entry.getAny(activeQuery)); // This cast should not fail!
  }
}


template<class IntegralType>
IntegralType
StringToIntegralParameterEntryValidator<IntegralType>::getIntegralValue(
  ParameterList &paramList, const std::string &paramName
  ,const std::string &defaultValue
  ) const
{
  const std::string& strValue =
    paramList.get (paramName,
                   caseSensitive_ ? defaultValue : upperCase (defaultValue));
  return getIntegralValue (strValue, paramName, paramList.name ());
}


template<class IntegralType>
std::string
StringToIntegralParameterEntryValidator<IntegralType>::getStringValue(
  ParameterList &paramList, const std::string &paramName
  ,const std::string &defaultValue
  ) const
{
  const std::string& strValue =
    paramList.get (paramName,
                  caseSensitive_ ? defaultValue : upperCase (defaultValue));
  getIntegralValue(strValue,paramName,paramList.name()); // Validate!
  return strValue;
}

template<class IntegralType>
ParameterEntryValidator::ValidStringsList
StringToIntegralParameterEntryValidator<IntegralType>::getStringDocs() const
{
  return validStringValuesDocs_;
}

template<class IntegralType>
const std::string&
StringToIntegralParameterEntryValidator<IntegralType>::getDefaultParameterName() const
{
  return defaultParameterName_;
}

template<class IntegralType>
std::string
StringToIntegralParameterEntryValidator<IntegralType>::validateString(
  const std::string &str, const std::string &paramName
  ,const std::string &sublistName
  ) const
{
  getIntegralValue (caseSensitive_ ? str : upperCase (str),
                    paramName,
                    sublistName); // Validate!
  return str;
}


// Overridden from ParameterEntryValidator

template<class IntegralType>
const std::string
StringToIntegralParameterEntryValidator<IntegralType>::getXMLTypeName() const{
  return "StringIntegralValidator(" + TypeNameTraits<IntegralType>::name () + ")";
}

template<class IntegralType>
void StringToIntegralParameterEntryValidator<IntegralType>::printDoc(
  std::string         const& docString
  ,std::ostream            & out
  ) const
{
  StrUtils::printLines(out,"# ",docString);
  out << "#   Valid std::string values:\n";
  out << "#     {\n";
  if(validStringValuesDocs_.get()) {
    for( int i = 0; i < static_cast<int>(validStringValues_->size()); ++i ) {
      out << "#       \"" << (*validStringValues_)[i] << "\"\n";
      StrUtils::printLines(out,"#          ",(*validStringValuesDocs_)[i] );
    }
  }
  else {
    StrUtils::printLines(out,"#   ",validValues_);
    // Note: Above validValues_ has for initial spaces already so indent should
    // be correct!
  }
  out << "#     }\n";
}


template<class IntegralType>
ParameterEntryValidator::ValidStringsList
StringToIntegralParameterEntryValidator<IntegralType>::validStringValues() const
{
  return validStringValues_;
}


template<class IntegralType>
void StringToIntegralParameterEntryValidator<IntegralType>::validate(
  ParameterEntry  const& entry
  ,std::string    const& paramName
  ,std::string    const& sublistName
  ) const
{
  this->getIntegralValue (entry, paramName, sublistName, false);
}


#if defined(HAVE_TEUCHOS_MODIFY_DEFAULTS_DURING_VALIDATION)
template<class IntegralType>
void StringToIntegralParameterEntryValidator<IntegralType>::validateAndModify(
  std::string const& paramName,
  std::string const& sublistName,
  ParameterEntry * entry
  ) const
{
  entry->setValue(this->getIntegralValue(*entry, paramName, sublistName, false));
}
#endif


// private

template<class IntegralType>
void StringToIntegralParameterEntryValidator<IntegralType>::setValidValues(
  ArrayView<const std::string>   const& strings
  ,ArrayView<const std::string>  const* stringsDocs
  )
{
  if (caseSensitive_) {
    validStringValues_ = rcp (new Array<std::string> (strings));
  }
  else {
    RCP<Array<std::string> > vals (new Array<std::string> (strings.size ()));
    for (Array<std::string>::size_type i = 0; i < strings.size (); ++i) {
      (*vals)[i] = upperCase (strings[i]);
    }
    validStringValues_ = rcp_const_cast<const Array<std::string> > (vals);
  }

  if (stringsDocs) {
    validStringValuesDocs_ = rcp (new Array<std::string> (*stringsDocs));
  }
  // Build the list of valid values in the same order as passed in by the client.
  std::ostringstream oss;
  for (int i = 0; i < static_cast<int> (strings.size()); ++i) {
    oss << "    \"" << strings[i] << "\"\n";
  }
  // Note: Above four spaces is designed for the error output above.
  validValues_ = oss.str();
}


} // namespace Teuchos


//
// Nonmember function implementations for StringToIntegralParameterEntryValidator
//


template<class IntegralType>
inline
Teuchos::RCP<Teuchos::StringToIntegralParameterEntryValidator<IntegralType> >
Teuchos::stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  std::string const& defaultParameterName
  )
{
  return rcp(
    new StringToIntegralParameterEntryValidator<IntegralType>(
      strings, defaultParameterName
      )
    );
}


template<class IntegralType>
inline
Teuchos::RCP<Teuchos::StringToIntegralParameterEntryValidator<IntegralType> >
Teuchos::stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  std::string const& defaultParameterName,
  const bool caseSensitive
  )
{
  typedef StringToIntegralParameterEntryValidator<IntegralType> ret_type;
  return rcp (new ret_type (strings, defaultParameterName, caseSensitive));
}



template<class IntegralType>
inline
Teuchos::RCP<Teuchos::StringToIntegralParameterEntryValidator<IntegralType> >
Teuchos::stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  ArrayView<const IntegralType> const& integralValues,
  std::string const& defaultParameterName
  )
{
  return rcp(
    new StringToIntegralParameterEntryValidator<IntegralType>(
      strings, integralValues, defaultParameterName
      )
    );
}


template<class IntegralType>
inline
Teuchos::RCP<Teuchos::StringToIntegralParameterEntryValidator<IntegralType> >
Teuchos::stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  ArrayView<const IntegralType> const& integralValues,
  std::string const& defaultParameterName,
  const bool caseSensitive)
{
  typedef StringToIntegralParameterEntryValidator<IntegralType> ret_type;
  return rcp (new ret_type (strings, integralValues,
                            defaultParameterName, caseSensitive));
}


template<class IntegralType>
inline
Teuchos::RCP< Teuchos::StringToIntegralParameterEntryValidator<IntegralType> >
Teuchos::stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  ArrayView<const std::string> const& stringsDocs,
  ArrayView<const IntegralType> const& integralValues,
  std::string const& defaultParameterName
  )
{
  return rcp(
    new StringToIntegralParameterEntryValidator<IntegralType>(
      strings, stringsDocs, integralValues, defaultParameterName
      )
    );
}


template<class IntegralType>
inline
Teuchos::RCP< Teuchos::StringToIntegralParameterEntryValidator<IntegralType> >
Teuchos::stringToIntegralParameterEntryValidator(
  ArrayView<const std::string> const& strings,
  ArrayView<const std::string> const& stringsDocs,
  ArrayView<const IntegralType> const& integralValues,
  std::string const& defaultParameterName,
  const bool caseSensitive)
{
  typedef StringToIntegralParameterEntryValidator<IntegralType> ret_type;
  return rcp (new ret_type (strings, stringsDocs, integralValues,
                            defaultParameterName, caseSensitive));
}


template<class IntegralType>
void Teuchos::setStringToIntegralParameter(
  std::string const& paramName,
  std::string const& defaultValue,
  std::string const& docString,
  ArrayView<const std::string> const& strings,
  ParameterList * paramList
  )
{
  typedef ParameterEntryValidator PEV;
  TEUCHOS_TEST_FOR_EXCEPT(0==paramList);
  paramList->set(
    paramName, defaultValue, docString,
    rcp_implicit_cast<const PEV>(
      stringToIntegralParameterEntryValidator<IntegralType>(
        strings, paramName
        )
      )
    );
}


template<class IntegralType>
void Teuchos::setStringToIntegralParameter(
  std::string const& paramName,
  std::string const& defaultValue,
  std::string const& docString,
  ArrayView<const std::string> const& strings,
  ArrayView<const IntegralType> const& integralValues,
  ParameterList * paramList
  )
{
  typedef ParameterEntryValidator PEV;
  TEUCHOS_TEST_FOR_EXCEPT(0==paramList);
  paramList->set(
    paramName, defaultValue, docString,
    rcp_implicit_cast<const PEV>(
      stringToIntegralParameterEntryValidator<IntegralType>(
        strings, integralValues, paramName
        )
      )
    );
}


template<class IntegralType>
void Teuchos::setStringToIntegralParameter(
  std::string const& paramName,
  std::string const& defaultValue,
  std::string const& docString,
  ArrayView<const std::string> const& strings,
  ArrayView<const std::string> const& stringsDocs,
  ArrayView<const IntegralType> const& integralValues,
  ParameterList * paramList
  )

{
  typedef ParameterEntryValidator PEV;
  TEUCHOS_TEST_FOR_EXCEPT(0==paramList);
  paramList->set(
    paramName, defaultValue, docString,
    rcp_implicit_cast<const PEV>(
      stringToIntegralParameterEntryValidator<IntegralType>(
        strings, stringsDocs, integralValues, paramName
        )
      )
    );
}


template<class IntegralType>
IntegralType Teuchos::getIntegralValue(
  ParameterList const& paramList, std::string const& paramName
  )
{
  const ParameterEntry &entry = paramList.getEntry(paramName);
  if (entry.isType<IntegralType>()){
    return getValue<IntegralType>(entry);
  } else{
    RCP<const StringToIntegralParameterEntryValidator<IntegralType> >
      integralValidator = getStringToIntegralParameterEntryValidator<IntegralType>(
        entry, paramList, paramName
        );
    return integralValidator->getIntegralValue(
      entry, paramName, paramList.name(), true );
  }
}


template<class IntegralType>
std::string Teuchos::getStringValue(
  ParameterList const& paramList, std::string const& paramName
  )
{
  const ParameterEntry &entry = paramList.getEntry(paramName);
  RCP<const StringToIntegralParameterEntryValidator<IntegralType> >
    integralValidator = getStringToIntegralParameterEntryValidator<IntegralType>(
      entry, paramList, paramName
      );
  return integralValidator->getStringValue(
    entry, paramName, paramList.name(), true
    );
}


template<class IntegralType>
Teuchos::RCP<const Teuchos::StringToIntegralParameterEntryValidator<IntegralType> >
Teuchos::getStringToIntegralParameterEntryValidator(
  ParameterEntry const& entry, ParameterList const& paramList,
  std::string const& paramName
  )
{
  const RCP<const ParameterEntryValidator> validator = entry.validator();
  TEUCHOS_TEST_FOR_EXCEPTION_PURE_MSG(
    is_null(validator), Exceptions::InvalidParameterType,
    "Error!  The parameter \""<<paramName<<"\" exists\n"
    "in the parameter (sub)list \""<<paramList.name()<<"\"\n"
    "but it does not contain any validator needed to extract\n"
    "an integral value of type \""<<TypeNameTraits<IntegralType>::name()<<"\"!"
    );
  const RCP<const StringToIntegralParameterEntryValidator<IntegralType> > integralValidator =
    rcp_dynamic_cast<const StringToIntegralParameterEntryValidator<IntegralType> >(
      validator
      );
  TEUCHOS_TEST_FOR_EXCEPTION_PURE_MSG(
    is_null(integralValidator), Exceptions::InvalidParameterType,
    "Error!  The parameter \""<<paramName<<"\" exists\n"
    "in the parameter (sub)list \""<<paramList.name()<<"\"\n"
    "but it contains the wrong type of validator.  The expected validator type\n"
    "is \""<<TypeNameTraits<StringToIntegralParameterEntryValidator<IntegralType> >::name()<<"\"\n"
    "but the contained validator type is \""<<typeName(*validator)<<"\"!"
    );
  return integralValidator;
}


#endif // TEUCHOS_STANDARD_PARAMETER_ENTRY_VALIDATORS_H