try to limit the getPropertyValue calls

Change-Id: I70b7a3b5f508ecb89d4e4e43cc4297805e83c9f7

chart2/source/view/main/PropertyMapper.cxx

@@ -80,6 +80,27 @@ void PropertyMapper::getValueMap(
     tPropertyNameMap::const_iterator aIt( rNameMap.begin() );
     tPropertyNameMap::const_iterator aEnd( rNameMap.end() );
 
+    uno::Reference< beans::XMultiPropertySet > xMultiPropSet(xSourceProp, uno::UNO_QUERY);
+    if(xMultiPropSet.is())
+    {
+        uno::Sequence< rtl::OUString > aPropSourceNames(rNameMap.size());
+        uno::Sequence< rtl::OUString > aPropTargetNames(rNameMap.size());
+        for(sal_Int32 i = 0; aIt != aEnd; ++aIt, ++i)
+        {
+            aPropSourceNames[i] = aIt->first;
+            aPropTargetNames[i] = aIt->second;
+        }
+
+        uno::Sequence< uno::Any > xValues = xMultiPropSet->getPropertyValues(aPropSourceNames);
+
+        for(sal_Int32 i = 0, n = rNameMap.size(); i < n; ++i)
+        {
+            if( xValues[i].hasValue() )
+                rValueMap.insert( tPropertyNameValueMap::value_type( aPropTargetNames[i], xValues[i] ) );
+        }
+    }
+    else
+    {
         for( ; aIt != aEnd; ++aIt )
         {
             OUString aTarget = aIt->first;
@@ -95,6 +116,7 @@ void PropertyMapper::getValueMap(
                 ASSERT_EXCEPTION( e );
             }
         }
+    }
 }
 
 void PropertyMapper::getMultiPropertyLists(