MDValueRelational Class Reference

#include <metadata_query.h>

Inheritance diagram for MDValueRelational:

Collaboration diagram for MDValueRelational:

Public Member Functions
template<class T >
	MDValueRelational (MDLabel label, const T &value, RelationalOp op, int limit=-1, int offset=0, MDLabel orderLabel=MDL_OBJID)
	MDValueRelational (const MDObject &value, RelationalOp op, int limit=-1, int offset=0, MDLabel orderLabel=MDL_OBJID)
	~MDValueRelational ()
String	opString () const
virtual String	queryStringFunc () const
template<class T >
void	setValue (T &value)
Public Member Functions inherited from MDQuery
	MDQuery (int limit=-1, int offset=0, MDLabel orderLabel=MDL_OBJID, bool asc=true)
virtual	~MDQuery ()
String	orderByString () const
String	limitString () const
String	whereString () const

Public Attributes
MDObject *	value
RelationalOp	op
Public Attributes inherited from MDQuery
int	limit
	If distint of -1 the results will be limited to this value. More...
int	offset
	If distint of 0, offset elements will be discarded. More...
MDLabel	orderLabel
	Label to which apply sort of the results. More...
bool	asc

Detailed Description

Subclass of MDQuery and base for all relational queries. This kind of query can be used to compare some LABEL values in a column of the MetaData with an specified VALUE.

See also

RelationalOp for possible relational operations.

Definition at line 103 of file metadata_query.h.

Constructor & Destructor Documentation

MDValueRelational() [1/2]

template<class T >

MDValueRelational::MDValueRelational ( MDLabel  label, const T &  value, RelationalOp  op, int  limit = -1, int  offset = 0, MDLabel  orderLabel = MDL_OBJID  )

inline

Definition at line 110 of file metadata_query.h.

                                                                                                                                     :MDQuery(limit, offset, orderLabel)
    {
        this->op = op;
        this->value = new MDObject(label, value);
    }

MDValueRelational() [2/2]

MDValueRelational::MDValueRelational ( const MDObject &  value, RelationalOp  op, int  limit = -1, int  offset = 0, MDLabel  orderLabel = MDL_OBJID  )

inline

Definition at line 116 of file metadata_query.h.

                                                                                                                             :MDQuery(limit, offset, orderLabel)
    {
        this->op = op;
        this->value = new MDObject(value);
    }

~MDValueRelational()

MDValueRelational::~MDValueRelational ( )

inline

Definition at line 122 of file metadata_query.h.

    {
        delete this->value;
    }

Member Function Documentation

opString()

String MDValueRelational::opString ( ) const

inline

Definition at line 127 of file metadata_query.h.

    {
        switch (op)
        {
        case EQ:
            return "=";
        case NE:
            return "!=";
        case GT:
            return ">";
        case LT:
            return "<";
        case GE:
            return ">=";
        case LE:
            return "<=";
        default:
            REPORT_ERROR(ERR_ARG_INCORRECT,"Unknown binary operator");
        }
    }

queryStringFunc()

virtual String MDValueRelational::queryStringFunc ( ) const

inlinevirtual

Return the query string, should be overrided in subclasses

Reimplemented from MDQuery.

Definition at line 148 of file metadata_query.h.

    {
        return (value == NULL) ? " " : MDL::label2Str(value->label) + opString() + value->toString(false, true);
    }

setValue()

template<class T >

void MDValueRelational::setValue ( T &  value )

inline

Definition at line 154 of file metadata_query.h.

    {
        this->value->setValue(value);
    }

Member Data Documentation

op

RelationalOp MDValueRelational::op

Definition at line 107 of file metadata_query.h.

value

MDObject* MDValueRelational::value

Definition at line 106 of file metadata_query.h.

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

• xmippCore/core/metadata_query.h