Inheritance diagram for MDExpression:

Collaboration diagram for MDExpression:

Public Member Functions
	MDExpression ()

	MDExpression (String _sExpression, int limit=-1, int offset=0, MDLabel orderLabel=MDL_OBJID)

virtual String	queryStringFunc () const

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

Additional Inherited Members
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

This subclass of Query will select those entries that satisfy an expression.

//Remove all images with rotational angle between 100 and 200
MetaData md;
md.removeObjects(MDExpression("angleRot > 100 AND angleRot < 200"));

Definition at line 294 of file metadata_query.h.

Constructor & Destructor Documentation

MDExpression::MDExpression ( )

inline

Definition at line 298 of file metadata_query.h.

     {
         sExpression = " 1=1 ";
     }

inline

Definition at line 302 of file metadata_query.h.

                                                 :MDQuery(limit, offset, orderLabel)
     {
         sExpression=_sExpression;
     }

virtual String MDExpression::queryStringFunc ( ) const

inlinevirtual

Return the query string, should be overrided in subclasses

Reimplemented from MDQuery.

Definition at line 310 of file metadata_query.h.

     {
         return sExpression;
     }

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