Public Member Functions | Protected Attributes | List of all members
DataSet Class Reference

A data set. More...

#include <DataSet.h>

Inheritance diagram for DataSet:
MathFunction ExpressionItem

Public Member Functions

 DataSet (std::string s_category="", std::string s_name="", std::string s_default_file="", std::string s_title="", std::string s_description="", bool is_local=true)
 DataSet (const DataSet *o)
ExpressionItemcopy () const
void set (const ExpressionItem *item)
int subtype () const
void setCopyright (std::string s_copyright)
const std::string & copyright () const
void setDefaultDataFile (std::string s_file)
const std::string & defaultDataFile () const
void setDefaultProperty (std::string property)
const std::string & defaultProperty () const
virtual int calculate (MathStructure &mstruct, const MathStructure &vargs, const EvaluationOptions &eo)
bool loadObjects (const char *file_name=NULL, bool is_user_defs=true)
int saveObjects (const char *file_name=NULL, bool save_global=false)
bool objectsLoaded () const
void setObjectsLoaded (bool objects_loaded)
void addProperty (DataProperty *dp)
void delProperty (DataProperty *dp)
void delProperty (DataPropertyIter *it)
DataPropertygetPrimaryKeyProperty ()
DataPropertygetProperty (std::string property)
DataPropertygetFirstProperty (DataPropertyIter *it)
DataPropertygetNextProperty (DataPropertyIter *it)
const std::string & getFirstPropertyName (DataPropertyIter *it)
const std::string & getNextPropertyName (DataPropertyIter *it)
void addObject (DataObject *o)
void delObject (DataObject *o)
void delObject (DataObjectIter *it)
DataObjectgetObject (std::string object)
DataObjectgetObject (const MathStructure &object)
DataObjectgetFirstObject (DataObjectIter *it)
DataObjectgetNextObject (DataObjectIter *it)
const MathStructuregetObjectProperyStruct (std::string property, std::string object)
const std::string & getObjectProperty (std::string property, std::string object)
std::string getObjectPropertyInputString (std::string property, std::string object)
std::string getObjectPropertyDisplayString (std::string property, std::string object)
std::string printProperties (std::string object)
std::string printProperties (DataObject *o)
- Public Member Functions inherited from MathFunction
 MathFunction (std::string name_, int argc_, int max_argc_=0, std::string cat_="", std::string title_="", std::string descr_="", bool is_active=true)
 MathFunction (const MathFunction *function)
virtual int type () const
virtual int id () const
std::string example (bool raw_format=false, std::string name_string="") const
void setExample (std::string new_example)
bool testArgumentCount (int itmp)
virtual MathStructure calculate (const std::string &eq, const EvaluationOptions &eo=default_evaluation_options)
virtual MathStructure parse (const std::string &eq, const ParseOptions &po=default_parse_options)
virtual int parse (MathStructure &mstruct, const std::string &eq, const ParseOptions &po=default_parse_options)
virtual MathStructure calculate (MathStructure &vargs, const EvaluationOptions &eo=default_evaluation_options)
std::string condition () const
std::string printCondition ()
void setCondition (std::string expression)
bool testCondition (const MathStructure &vargs)
int args () const
int minargs () const
int maxargs () const
int args (const std::string &str, MathStructure &vargs, const ParseOptions &po=default_parse_options)
size_t lastArgumentDefinitionIndex () const
ArgumentgetArgumentDefinition (size_t index)
void clearArgumentDefinitions ()
void setArgumentDefinition (size_t index, Argument *argdef)
int stringArgs (const std::string &str, std::vector< std::string > &svargs)
void setDefaultValue (size_t arg_, std::string value_)
const std::string & getDefaultValue (size_t arg_) const
void appendDefaultValues (MathStructure &vargs)
MathStructure produceVector (const MathStructure &vargs, int begin=-1, int end=-1)
MathStructure produceArgumentsVector (const MathStructure &vargs, int begin=-1, int end=-1)
virtual bool representsPositive (const MathStructure &, bool=false) const
virtual bool representsNegative (const MathStructure &, bool=false) const
virtual bool representsNonNegative (const MathStructure &, bool=false) const
virtual bool representsNonPositive (const MathStructure &, bool=false) const
virtual bool representsInteger (const MathStructure &, bool=false) const
virtual bool representsNumber (const MathStructure &, bool=false) const
virtual bool representsRational (const MathStructure &, bool=false) const
virtual bool representsNonComplex (const MathStructure &, bool=false) const
virtual bool representsReal (const MathStructure &, bool=false) const
virtual bool representsComplex (const MathStructure &, bool=false) const
virtual bool representsNonZero (const MathStructure &, bool=false) const
virtual bool representsEven (const MathStructure &, bool=false) const
virtual bool representsOdd (const MathStructure &, bool=false) const
virtual bool representsUndefined (const MathStructure &) const
virtual bool representsBoolean (const MathStructure &) const
virtual bool representsNonMatrix (const MathStructure &) const
virtual bool representsScalar (const MathStructure &) const
- Public Member Functions inherited from ExpressionItem
 ExpressionItem (std::string cat_, std::string name_, std::string title_="", std::string descr_="", bool is_local=true, bool is_builtin=false, bool is_active=true)
virtual bool destroy ()
bool isRegistered () const
void setRegistered (bool is_registered)
 For internal use.
virtual const std::string & name (bool use_unicode=false, bool(*can_display_unicode_string_function)(const char *, void *)=NULL, void *can_display_unicode_string_arg=NULL) const
virtual const std::string & referenceName () const
virtual const ExpressionNamepreferredName (bool abbreviation=false, bool use_unicode=false, bool plural=false, bool reference=false, bool(*can_display_unicode_string_function)(const char *, void *)=NULL, void *can_display_unicode_string_arg=NULL) const
virtual const ExpressionNamepreferredInputName (bool abbreviation=false, bool use_unicode=false, bool plural=false, bool reference=false, bool(*can_display_unicode_string_function)(const char *, void *)=NULL, void *can_display_unicode_string_arg=NULL) const
virtual const ExpressionNamepreferredDisplayName (bool abbreviation=false, bool use_unicode=false, bool plural=false, bool reference=false, bool(*can_display_unicode_string_function)(const char *, void *)=NULL, void *can_display_unicode_string_arg=NULL) const
virtual const ExpressionNamegetName (size_t index) const
virtual void setName (const ExpressionName &ename, size_t index=1, bool force=true)
virtual void setName (std::string sname, size_t index, bool force=true)
virtual void addName (const ExpressionName &ename, size_t index=0, bool force=true)
virtual void addName (std::string sname, size_t index=0, bool force=true)
virtual size_t countNames () const
virtual void clearNames ()
virtual void clearNonReferenceNames ()
virtual void removeName (size_t index)
virtual size_t hasName (const std::string &sname, bool case_sensitive=true) const
virtual size_t hasNameCaseSensitive (const std::string &sname) const
virtual const ExpressionNamefindName (int abbreviation=-1, int use_unicode=-1, int plural=-1, bool(*can_display_unicode_string_function)(const char *, void *)=NULL, void *can_display_unicode_string_arg=NULL) const
virtual const std::string & title (bool return_name_if_no_title=true, bool use_unicode=false, bool(*can_display_unicode_string_function)(const char *, void *)=NULL, void *can_display_unicode_string_arg=NULL) const
virtual void setTitle (std::string title_)
virtual const std::string & description () const
virtual void setDescription (std::string descr_)
virtual const std::string & category () const
virtual void setCategory (std::string cat_)
virtual bool hasChanged () const
virtual void setChanged (bool has_changed)
virtual bool isLocal () const
virtual bool setLocal (bool is_local=true, int will_be_active=-1)
virtual bool isBuiltin () const
virtual bool isApproximate () const
virtual void setApproximate (bool is_approx=true)
virtual int precision () const
virtual void setPrecision (int prec)
virtual bool isActive () const
virtual void setActive (bool is_active)
virtual bool isHidden () const
virtual void setHidden (bool is_hidden)
virtual int refcount () const
virtual void ref ()
virtual void unref ()
virtual void ref (ExpressionItem *o)
virtual void unref (ExpressionItem *o)
virtual ExpressionItemgetReferencer (size_t index=1) const
virtual bool changeReference (ExpressionItem *o_from, ExpressionItem *o_to)

Protected Attributes

std::string sfile
std::string scopyright
bool b_loaded
std::vector< DataProperty * > properties
std::vector< DataObject * > objects
- Protected Attributes inherited from MathFunction
MathFunction_p * priv
int argc
int max_argc
std::vector< std::string > default_values
size_t last_argdef_index
std::string scondition
std::string sexample
- Protected Attributes inherited from ExpressionItem
std::string scat
std::string stitle
std::string sdescr
bool b_local
bool b_changed
bool b_builtin
bool b_approx
bool b_active
bool b_registered
bool b_hidden
bool b_destroyed
int i_ref
int i_precision
std::vector< ExpressionItem * > v_refs
std::vector< ExpressionNamenames

Additional Inherited Members

- Protected Member Functions inherited from MathFunction
bool testArguments (MathStructure &vargs)
virtual MathStructure createFunctionMathStructureFromVArgs (const MathStructure &vargs)
virtual MathStructure createFunctionMathStructureFromSVArgs (std::vector< std::string > &svargs)

Detailed Description

A data set.

This is a simple database class for storage of many grouped values, when ordinary variables is not practical.

A data set consists of properties and objects, with values for the properties. Qalculate! includes for example a "Planets" data set with properties such as name, mass, speed and density, and an object for each planet in solar system.

A data set is also mathemtical function, dataset(object, property), which retrieves values for objects and properties. Data sets can be saved and loaded from a XML file.

Member Function Documentation

◆ calculate()

virtual int DataSet::calculate ( MathStructure & mstruct,
const MathStructure & vargs,
const EvaluationOptions & eo )

The main function for subclasses to reimplement. Calculates a value from arguments in vargs and puts it in mstruct.

This function expects the number of arguments to be equal to the maximum number of arguments, and checked by the argument definitions.

If the return value is negative, then argument -(return value) has been evaluated in mstruct. If -(return value) is greater than max arguments, then mstruct is a std::vector of evaluated argument values.

[out]mstructStructure that is set with the result of the calculation.
vargsArguments passed to the mathematical function.
eoEvaluation options.
1 if the calculation was successful.

Reimplemented from MathFunction.

◆ copy()

ExpressionItem * DataSet::copy ( ) const

Implements MathFunction.

◆ set()

void DataSet::set ( const ExpressionItem * item)

Reimplemented from MathFunction.

◆ subtype()

int DataSet::subtype ( ) const

Returns the subtype of the mathematical function, corresponding to which subsubclass the object belongs to.


Reimplemented from MathFunction.

The documentation for this class was generated from the following file: