LCOV - code coverage report
Current view: top level - xmloff/source/chart - MultiPropertySetHandler.hxx (source / functions) Hit Total Coverage
Test: libreoffice_filtered.info Lines: 40 55 72.7 %
Date: 2012-08-25 Functions: 12 14 85.7 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 22 62 35.5 %

           Branch data     Line data    Source code
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      28                 :            : 
      29                 :            : #ifndef _MULTI_PROPERTY_SET_HANDLER_HXX
      30                 :            : #define _MULTI_PROPERTY_SET_HANDLER_HXX
      31                 :            : 
      32                 :            : #include    <rtl/ustring.hxx>
      33                 :            : #include <com/sun/star/beans/XPropertySet.hpp>
      34                 :            : #include <com/sun/star/beans/XMultiPropertySet.hpp>
      35                 :            : 
      36                 :            : 
      37                 :            : /** @descr  MultiPropertySetHandler handles the two slightly different
      38                 :            :         interfaces XPropertySet and XMultiPorpertySet for accessing
      39                 :            :         properties of an object.
      40                 :            : 
      41                 :            :         It uses the classes PropertyWrapperBase and the template
      42                 :            :         PropertyWrapper for a type safe access to single properties.
      43                 :            : 
      44                 :            :         The function class OUStringComparison is used by a STL map to
      45                 :            :         sort the properties by names.
      46                 :            : */
      47                 :            : 
      48                 :            : /** @descr  Base class for the templated property wrappers.
      49                 :            :         Having a common base class allows to set a variable to the
      50                 :            :         property's value without explicit knowledge of its type.
      51                 :            : */
      52                 :            : class   PropertyWrapperBase
      53                 :            : {
      54                 :            : public:
      55                 :            :     /** @descr  Create a class instance and store the given name.
      56                 :            :         @param  rName   The name of the property.
      57                 :            :     */
      58                 :        288 :     PropertyWrapperBase (const ::rtl::OUString & rName)
      59                 :        288 :         :   msName (rName)
      60                 :        288 :     {}
      61                 :        288 :     virtual ~PropertyWrapperBase()
      62         [ -  + ]:        288 :     {}
      63                 :            : 
      64                 :            :     /** @descr  Abstract interface of a method for setting a variables
      65                 :            :             value to that of the property.
      66                 :            :     */
      67                 :            :     virtual void    SetValue    (const ::com::sun::star::uno::Any & rValue) = 0;
      68                 :            : 
      69                 :            :     const ::rtl::OUString msName;
      70                 :            : };
      71                 :            : 
      72                 :            : 
      73                 :            : 
      74                 :            : 
      75                 :            : /** @descr  For every property type there will be one instantiation of this
      76                 :            :         template class with its own and type specific version of SetValue.
      77                 :            : */
      78         [ -  + ]:        576 : template<class T> class PropertyWrapper : public PropertyWrapperBase
      79                 :            : {
      80                 :            : public:
      81                 :            :     /** @descr  Create a wrapper for a property of type T.
      82                 :            :     */
      83                 :        288 :     PropertyWrapper (const ::rtl::OUString & rName, T & rValue)
      84                 :            :         :   PropertyWrapperBase (rName),
      85                 :        288 :             mrValue (rValue)
      86                 :        288 :     {}
      87                 :            : 
      88                 :            :     /** descr   Set the given value inside an Any to the variable referenced
      89                 :            :         by the data member.
      90                 :            :     */
      91                 :        288 :     virtual void    SetValue    (const ::com::sun::star::uno::Any & rValue)
      92                 :            :     {
      93                 :        288 :         rValue >>= mrValue;
      94                 :        288 :     }
      95                 :            : 
      96                 :            : private:
      97                 :            :     /// Reference to a variable.  Its value can be modified by a call to SetValue.
      98                 :            :     T   &   mrValue;
      99                 :            : };
     100                 :            : 
     101                 :            : 
     102                 :            : 
     103                 :            : 
     104                 :            : /** @descr  Function object for comparing two OUStrings.
     105                 :            : */
     106                 :            : class   OUStringComparison
     107                 :            : {
     108                 :            : public:
     109                 :            :     /// Compare two strings.  Returns true if the first is before the second.
     110                 :       1692 :     inline  bool    operator()  (const ::rtl::OUString & a, const ::rtl::OUString & b) const
     111                 :            :     {
     112                 :       1692 :         return (a.compareTo (b) < 0);
     113                 :            :     }
     114                 :            : };
     115                 :            : 
     116                 :            : 
     117                 :            : 
     118                 :            : 
     119                 :            : /** @descr  This class lets you get the values from an object that either
     120                 :            :         supports the interface XPropertySet or XMultiPropertySet.  If it
     121                 :            :         supports both interfaces then XMultiPropertySet is preferred.
     122                 :            : 
     123                 :            :         Using it works in three steps.
     124                 :            :         1.  Create an instance and pass a reference to the object from which to
     125                 :            :             get the property values.
     126                 :            :         2.  Make all properties whose values you want to get known to the object
     127                 :            :             by using the Add method.  This creates instances of a template class
     128                 :            :             that stores the properties name and a reference to the variable in
     129                 :            :             which to store its value.
     130                 :            :         3.  Finally call GetProperties to store the properties values into the
     131                 :            :             variables specified in step 2.  This uses either the XPropertySet or
     132                 :            :             (preferred) the XMultiPropertySet interface.
     133                 :            : */
     134                 :            : class   MultiPropertySetHandler
     135                 :            : {
     136                 :            : public:
     137                 :            :     /** @descr  Create a handler of the property set of the given
     138                 :            :             object.
     139                 :            :         @param  xObject A reference to any of the object's interfaces.
     140                 :            :             not neccessarily XPropertySet or XMultiPropertySet.  It
     141                 :            :             is casted later to one of the two of them.
     142                 :            :     */
     143                 :            :     MultiPropertySetHandler (::com::sun::star::uno::Reference<
     144                 :            :         ::com::sun::star::uno::XInterface> xObject);
     145                 :            :     ~MultiPropertySetHandler    (void);
     146                 :            :     /** @descr  Add a property to handle.  The type given implicitely by the
     147                 :            :             reference to a variable is used to create an instance of
     148                 :            :             the PropertyWrapper template class.
     149                 :            :         @param  sName   Name of the property.
     150                 :            :         @param  rValue  Reference to a variable whose value is set by the
     151                 :            :             call to GetProperties to the property's value.
     152                 :            :     */
     153                 :        288 :     template<class T> void  Add (const ::rtl::OUString & sName, T& rValue)
     154                 :            :     {
     155                 :        288 :         aPropertyList[sName] = new PropertyWrapper<T> (sName, rValue);
     156                 :        288 :     }
     157                 :            : 
     158                 :            :     /** @descr  Try to get the values for all properties added with the Add
     159                 :            :             method.  If possible it uses the XMultiPropertySet.  If that fails
     160                 :            :             (i.e. for an UnknownPropertyExcption) or if the interface is not
     161                 :            :             supported it uses the XPropertySet interface.
     162                 :            :         @return If none of the two interfaces is supported or using them both
     163                 :            :             fails then sal_False is returned.  Else True is returned.
     164                 :            :     */
     165                 :            :     inline  sal_Bool    GetProperties   (void);
     166                 :            : 
     167                 :            : private:
     168                 :            :     /** @descr  Try to use the XMultiPropertySet interface to get the property
     169                 :            :             values.
     170                 :            :         @param  rNameList   A precomputed and sorted sequence of OUStrings
     171                 :            :             containing the properties names.
     172                 :            :         @return True if values could be derived.
     173                 :            :     */
     174                 :            :     inline  sal_Bool    MultiGet    (const ::com::sun::star::uno::Sequence<
     175                 :            :         ::rtl::OUString> & rNameList);
     176                 :            : 
     177                 :            :     /** @descr  Try to use the XPropertySet interface to get the property
     178                 :            :             values.
     179                 :            :         @param  rNameList   A precomputed and sorted sequence of OUStrings
     180                 :            :             containing the properties names.
     181                 :            :         @return True if values could be derived.
     182                 :            :     */
     183                 :            :     inline  sal_Bool    SingleGet   (const ::com::sun::star::uno::Sequence<
     184                 :            :         ::rtl::OUString> & rNameList);
     185                 :            : 
     186                 :            :     /** @descr  STL map that maps from property names to polymorphic instances of
     187                 :            :             PropertyWrapper.  It uses OUStringComparison for sorting
     188                 :            :             the property names.
     189                 :            :     */
     190                 :            :     ::std::map< ::rtl::OUString, PropertyWrapperBase*, OUStringComparison> aPropertyList;
     191                 :            : 
     192                 :            :     /// The object from which to get the property values.
     193                 :            :     ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>    mxObject;
     194                 :            : };
     195                 :            : 
     196                 :            : 
     197                 :            : 
     198                 :            : //=====  Inline implementation of the methods declared above  ==========================
     199                 :            : 
     200                 :         18 : MultiPropertySetHandler::MultiPropertySetHandler (::com::sun::star::uno::Reference<
     201                 :            :     ::com::sun::star::uno::XInterface> xObject)
     202                 :         18 :         :   mxObject (xObject)
     203                 :            : {
     204                 :         18 : }
     205                 :            : 
     206                 :            : 
     207                 :            : 
     208                 :            : 
     209                 :         18 : MultiPropertySetHandler::~MultiPropertySetHandler (void)
     210                 :            : {
     211                 :         18 :     ::std::map< ::rtl::OUString, PropertyWrapperBase*, OUStringComparison>::iterator I;
     212         [ +  + ]:        306 :     for (I=aPropertyList.begin(); I!=aPropertyList.end(); ++I)
     213 [ +  - ][ +  - ]:        288 :         delete I->second;
     214                 :         18 : }
     215                 :            : 
     216                 :            : 
     217                 :            : 
     218                 :         18 : sal_Bool    MultiPropertySetHandler::GetProperties  (void)
     219                 :            : {
     220                 :         18 :     ::std::map< ::rtl::OUString, PropertyWrapperBase*, OUStringComparison>::iterator I;
     221         [ +  - ]:         18 :     ::com::sun::star::uno::Sequence< ::rtl::OUString> aNameList (aPropertyList.size());
     222                 :            :     int i;
     223         [ +  + ]:        306 :     for (I=aPropertyList.begin(),i=0; I!=aPropertyList.end(); ++I)
     224         [ +  - ]:        288 :         aNameList[i++] = I->second->msName;
     225 [ +  - ][ -  + ]:         18 :     if ( ! MultiGet(aNameList))
     226 [ #  # ][ #  # ]:          0 :         if ( ! SingleGet(aNameList))
     227                 :          0 :             return sal_False;
     228         [ +  - ]:         18 :     return sal_True;
     229                 :            : }
     230                 :            : 
     231                 :            : 
     232                 :            : 
     233                 :            : 
     234                 :         18 : sal_Bool    MultiPropertySetHandler::MultiGet   (const ::com::sun::star::uno::Sequence<
     235                 :            :     ::rtl::OUString> & rNameList)
     236                 :            : {
     237                 :            :     ::com::sun::star::uno::Reference< ::com::sun::star::beans::XMultiPropertySet> xMultiSet (
     238         [ +  - ]:         18 :         mxObject, ::com::sun::star::uno::UNO_QUERY);
     239         [ +  - ]:         18 :     if (xMultiSet.is())
     240                 :            :         try
     241                 :            :         {
     242                 :         18 :             ::std::map< ::rtl::OUString, PropertyWrapperBase*, OUStringComparison>::iterator I;
     243                 :            :             int i;
     244                 :            :             ::com::sun::star::uno::Sequence< ::com::sun::star::uno::Any> aValueList =
     245 [ +  - ][ +  - ]:         18 :                 xMultiSet->getPropertyValues (rNameList);
     246         [ +  + ]:        306 :             for (I=aPropertyList.begin(),i=0; I!=aPropertyList.end(); ++I)
     247 [ +  - ][ +  - ]:        306 :                 I->second->SetValue (aValueList[i++]);
           [ +  -  #  # ]
     248                 :            :         }
     249         [ #  # ]:          0 :         catch (const ::com::sun::star::beans::UnknownPropertyException&)
     250                 :            :         {
     251                 :          0 :             return sal_False;
     252                 :            :         }
     253                 :            :     else
     254                 :          0 :         return sal_False;
     255                 :            : 
     256                 :         18 :     return sal_True;
     257                 :            : }
     258                 :            : 
     259                 :            : 
     260                 :            : 
     261                 :            : 
     262                 :          0 : sal_Bool    MultiPropertySetHandler::SingleGet  (const ::com::sun::star::uno::Sequence<
     263                 :            :     ::rtl::OUString> & rNameList)
     264                 :            : {
     265                 :            :     ::com::sun::star::uno::Reference< ::com::sun::star::beans::XPropertySet> xSingleSet (
     266         [ #  # ]:          0 :         mxObject, ::com::sun::star::uno::UNO_QUERY);
     267         [ #  # ]:          0 :     if (xSingleSet.is())
     268                 :            :         try
     269                 :            :         {
     270                 :          0 :             ::std::map< ::rtl::OUString, PropertyWrapperBase*, OUStringComparison>::iterator I;
     271                 :            :             int i;
     272         [ #  # ]:          0 :             for (I=aPropertyList.begin(),i=0; I!=aPropertyList.end(); ++I)
     273 [ #  # ][ #  # ]:          0 :                 I->second->SetValue (xSingleSet->getPropertyValue (rNameList[i++]));
         [ #  # ][ #  # ]
     274                 :            :         }
     275         [ #  # ]:          0 :         catch (const ::com::sun::star::beans::UnknownPropertyException&)
     276                 :            :         {
     277                 :          0 :             return sal_False;
     278                 :            :         }
     279                 :            :     else
     280                 :          0 :         return sal_False;
     281                 :            : 
     282                 :          0 :     return sal_True;
     283                 :            : }
     284                 :            : 
     285                 :            : 
     286                 :            : #endif
     287                 :            : 
     288                 :            : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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