Store the handler as a const pointer.

Handlers are conceptually stateless; we can keep them as const objects.

Change-Id: I3d35ab0695037632e82f67f901c9795adf9bdd8d

include/xmloff/prhdlfac.hxx

@@ -84,7 +84,7 @@ public:
 
 protected:
     /** Retrieves a PropertyHandler from the internal cache */
-    XMLPropertyHandler* GetHdlCache( sal_Int32 nType ) const;
+    const XMLPropertyHandler* GetHdlCache( sal_Int32 nType ) const;
     /** Puts a PropertyHandler into the internal cache */
     void PutHdlCache( sal_Int32 nType, const XMLPropertyHandler* pHdl ) const;
 
@@ -94,7 +94,7 @@ private:
     SAL_DLLPRIVATE const XMLPropertyHandler* GetBasicHandler( sal_Int32 nType )
         const;
 
-    typedef ::std::map< sal_Int32, XMLPropertyHandler* > CacheMap;
+    typedef ::std::map<sal_Int32, const XMLPropertyHandler*> CacheMap;
     mutable CacheMap maHandlerCache;
 };
 

xmloff/source/style/prhdlfac.cxx

@@ -110,9 +110,9 @@ const XMLPropertyHandler* XMLPropertyHandlerFactory::GetPropertyHandler( sal_Int
 }
 
 // Helper-methods to create and cache PropertyHandler
-XMLPropertyHandler* XMLPropertyHandlerFactory::GetHdlCache( sal_Int32 nType ) const
+const XMLPropertyHandler* XMLPropertyHandlerFactory::GetHdlCache( sal_Int32 nType ) const
 {
-    XMLPropertyHandler* pRet = NULL;
+    const XMLPropertyHandler* pRet = NULL;
 
     if( maHandlerCache.find( nType ) != maHandlerCache.end() )
         pRet = maHandlerCache.find( nType )->second;
@@ -122,7 +122,7 @@ XMLPropertyHandler* XMLPropertyHandlerFactory::GetHdlCache( sal_Int32 nType ) co
 
 void XMLPropertyHandlerFactory::PutHdlCache( sal_Int32 nType, const XMLPropertyHandler* pHdl ) const
 {
-    maHandlerCache[nType] = (XMLPropertyHandler*)pHdl;
+    maHandlerCache[nType] = pHdl;
 }
 
 const XMLPropertyHandler* XMLPropertyHandlerFactory::GetBasicHandler( sal_Int32 nType ) const