OpenWalnut  1.4.0
WPropertyConstraintSelectOnlyOne.h
00001 //---------------------------------------------------------------------------
00002 //
00003 // Project: OpenWalnut ( http://www.openwalnut.org )
00004 //
00005 // Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS
00006 // For more information see http://www.openwalnut.org/copying
00007 //
00008 // This file is part of OpenWalnut.
00009 //
00010 // OpenWalnut is free software: you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as published by
00012 // the Free Software Foundation, either version 3 of the License, or
00013 // (at your option) any later version.
00014 //
00015 // OpenWalnut is distributed in the hope that it will be useful,
00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00018 // GNU Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public License
00021 // along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
00022 //
00023 //---------------------------------------------------------------------------
00024 
00025 #ifndef WPROPERTYCONSTRAINTSELECTONLYONE_H
00026 #define WPROPERTYCONSTRAINTSELECTONLYONE_H
00027 
00028 #include "../WPropertyTypes.h"
00029 #include "WPropertyConstraintTypes.h"
00030 
00031 /**
00032  * This class allows constraining selection properties to not allow selection of multiple items.
00033  */
00034 template < typename T >
00035 class WPropertyConstraintSelectOnlyOne: public WPropertyVariable< T >::PropertyConstraint
00036 {
00037 public:
00038     /**
00039      * Constructor.
00040      */
00041     explicit WPropertyConstraintSelectOnlyOne();
00042 
00043     /**
00044      * Destructor.
00045      */
00046     virtual ~WPropertyConstraintSelectOnlyOne();
00047 
00048     /**
00049      * Checks whether the specified value is a directory or not.
00050      *
00051      * \param property the property whose new value should be set.
00052      * \param value the new value to check
00053      *
00054      * \return true if the file/path is a directory
00055      */
00056     virtual bool accept( boost::shared_ptr< WPropertyVariable< T > > property, const T& value );
00057 
00058     /**
00059      * Allows simple identification of the real constraint type.
00060      *
00061      * \return the type
00062      */
00063     virtual PROPERTYCONSTRAINT_TYPE getType();
00064 
00065     /**
00066      * Method to clone the constraint and create a new one with the correct dynamic type.
00067      *
00068      * \return the constraint.
00069      */
00070     virtual boost::shared_ptr< typename WPropertyVariable< T >::PropertyConstraint > clone();
00071 
00072 private:
00073 };
00074 
00075 template < typename T >
00076 WPropertyConstraintSelectOnlyOne< T >::WPropertyConstraintSelectOnlyOne()
00077 {
00078 }
00079 
00080 template < typename T >
00081 WPropertyConstraintSelectOnlyOne< T >::~WPropertyConstraintSelectOnlyOne()
00082 {
00083 }
00084 
00085 template < typename T >
00086 bool WPropertyConstraintSelectOnlyOne< T >::accept( boost::shared_ptr< WPropertyVariable< T > > /* property */, const T& value )
00087 {
00088     return ( value.size() <= 1 );
00089 }
00090 
00091 template < typename T >
00092 PROPERTYCONSTRAINT_TYPE WPropertyConstraintSelectOnlyOne< T >::getType()
00093 {
00094     return PC_SELECTONLYONE;
00095 }
00096 
00097 template < typename T >
00098 boost::shared_ptr< typename WPropertyVariable< T >::PropertyConstraint > WPropertyConstraintSelectOnlyOne< T >::clone()
00099 {
00100     return boost::shared_ptr< typename WPropertyVariable< T >::PropertyConstraint >( new WPropertyConstraintSelectOnlyOne< T >( *this ) );
00101 }
00102 
00103 #endif  // WPROPERTYCONSTRAINTSELECTONLYONE_H
00104