LCOV - code coverage report
Current view: top level - xmloff/inc - MultiPropertySetHelper.hxx (source / functions) Hit Total Coverage
Test: commit c8344322a7af75b84dd3ca8f78b05543a976dfd5 Lines: 6 6 100.0 %
Date: 2015-06-13 12:38:46 Functions: 3 3 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : #ifndef INCLUDED_XMLOFF_INC_MULTIPROPERTYSETHELPER_HXX
      20             : #define INCLUDED_XMLOFF_INC_MULTIPROPERTYSETHELPER_HXX
      21             : 
      22             : #include <rtl/ustring.hxx>
      23             : #include <com/sun/star/uno/Sequence.hxx>
      24             : #include <tools/debug.hxx>
      25             : 
      26             : 
      27             : namespace com { namespace sun { namespace star {
      28             :     namespace beans { class XMultiPropertySet; }
      29             :     namespace beans { class XPropertySet; }
      30             :     namespace beans { class XPropertySetInfo; }
      31             : } } }
      32             : 
      33             : 
      34             : /**
      35             :  * The MultiPropertySetHelper performs the following functions:
      36             :  *
      37             :  * Given a list of property names (as sal_Char** or OUString*), it can
      38             :  * query an XMultiPropertySet (or XPropertySet) which of these properties
      39             :  * it supports (method hasProperties(...)). The properties *MUST* be
      40             :  * sorted alphabetically.
      41             :  *
      42             :  * Then, the X(Multi)PropertySet can be queried for values, and only
      43             :  * the supported properties are queried. (method getValues(...)) The
      44             :  * values are stored in the helper itself.
      45             :  *
      46             :  * Finally, each property can be queried for existence
      47             :  * (method hasProperty(...)) or its value (method (getValue(...))).
      48             :  *
      49             :  * After some initial preparation (hasProperties, getValues) the
      50             :  * MultiPropertySetHelper can be used similarly to an
      51             :  * XPropertySet in that you can query the values in the places where you
      52             :  * need them. However, if an XMultiPropertySet is supplied, the queries
      53             :  * are more efficient, often significantly so.
      54             :  */
      55             : class MultiPropertySetHelper
      56             : {
      57             :     /// names of all properties
      58             :     OUString* pPropertyNames;
      59             : 
      60             :     /// length of pPropertyNames array
      61             :     sal_Int16 nLength;
      62             : 
      63             :     /// the sequence of property names that the current (multi)
      64             :     /// property set implementation supports
      65             :     ::com::sun::star::uno::Sequence< OUString > aPropertySequence;
      66             : 
      67             :     /// an array of indices that maps from pPropertyNames indices to
      68             :     /// aPropertySequence indices
      69             :     sal_Int16* pSequenceIndex;
      70             : 
      71             :     /// the last set of values retrieved by getValues
      72             :     ::com::sun::star::uno::Sequence< ::com::sun::star::uno::Any > aValues;
      73             : 
      74             :     /// result of aValues.getConstArray()
      75             :     const ::com::sun::star::uno::Any* pValues;
      76             : 
      77             :     /// an empty Any
      78             :     ::com::sun::star::uno::Any aEmptyAny;
      79             : 
      80             : public:
      81             : 
      82             :     MultiPropertySetHelper( const sal_Char** pNames );
      83             : 
      84             :     ~MultiPropertySetHelper();
      85             : 
      86             : 
      87             :     /**
      88             :      * Call hasPropertiesByName for the provided XPropertySetInfo and build
      89             :      * list of allowed properties.
      90             :      */
      91             :     void hasProperties( const ::com::sun::star::uno::Reference<
      92             :                             ::com::sun::star::beans::XPropertySetInfo> & );
      93             : 
      94             : 
      95             :     /**
      96             :      * Return whether hasProperties was called
      97             :      * (i.e. if we are ready to call getValues)
      98             :      */
      99             :     bool checkedProperties();
     100             : 
     101             :     /**
     102             :      * Get values from the XMultiPropertySet.
     103             :      *
     104             :      * May only be called after hasProperties() was called for the
     105             :      * appropriate XPropertySetInfo.
     106             :      */
     107             :     void getValues( const ::com::sun::star::uno::Reference<
     108             :                             ::com::sun::star::beans::XMultiPropertySet> & );
     109             : 
     110             :     /**
     111             :      * Get values from the XPropertySet. This can be much slower than
     112             :      * getValues( const Reference<XMultiPropertySet& ) and hence
     113             :      * should be avoided.
     114             :      *
     115             :      * May only be called after hasProperties() was called for the
     116             :      * appropriate XPropertySetInfo.
     117             :      */
     118             :     void getValues( const ::com::sun::star::uno::Reference<
     119             :                             ::com::sun::star::beans::XPropertySet> & );
     120             : 
     121             : 
     122             : 
     123             :     /**
     124             :      * Get a value from the values array.
     125             :      *
     126             :      * May only be called after getValues() was called.
     127             :      */
     128             :     inline const ::com::sun::star::uno::Any& getValue( sal_Int16 nIndex );
     129             : 
     130             :     /**
     131             :      * Find out if this property is supported.
     132             :      *
     133             :      * May only be called after hasProperties() was called.
     134             :      */
     135             :     inline bool hasProperty( sal_Int16 nIndex );
     136             : 
     137             :     /**
     138             :      * Get a value from the XPropertySet on demand.
     139             :      *
     140             :      * If neither getValues nor getValueOnDemand has been called already
     141             :      * after the last call to resetValues, the values are retrieved
     142             :      * using getValues. Otherwise the value already retrieved is returned.
     143             :      * In case XMultiPropertySet is supported by the XPropertySet and
     144             :      * bTryMult is set, the XMultiPropertySet is used to get the values.
     145             :      *
     146             :      */
     147             :     const ::com::sun::star::uno::Any& getValue( sal_Int16 nIndex,
     148             :                         const ::com::sun::star::uno::Reference<
     149             :                             ::com::sun::star::beans::XPropertySet> &,
     150             :                         bool bTryMulti = false );
     151             : 
     152             :     /**
     153             :      * Get a value from the XMultiPropertySet on demand.
     154             :      *
     155             :      * If neither getValues nor getValueOnDemand has been called already
     156             :      * after the last call to resetValues, the values are retrieved
     157             :      * using getValues. Otherwise the value already retrieved is returned.
     158             :      * In case XMultiPropertySet is supported by the XPropertySet,
     159             :      * XMultiPropertySet is used to get the values.
     160             :      *
     161             :      */
     162             :     const ::com::sun::star::uno::Any& getValue( sal_Int16 nIndex,
     163             :                         const ::com::sun::star::uno::Reference<
     164             :                             ::com::sun::star::beans::XMultiPropertySet> & );
     165             : 
     166        2591 :     inline void resetValues() { pValues = 0; }
     167             : };
     168             : 
     169             : 
     170             : // inline implementations of the often-called methods getValue and hasProperty:
     171             : 
     172        4073 : const ::com::sun::star::uno::Any& MultiPropertySetHelper::getValue(
     173             :     sal_Int16 nValueNo )
     174             : {
     175             :     assert(pValues && "called getValue() without calling getValues()");
     176             :     assert(pSequenceIndex && "called getValue() without calling hasProperties()");
     177             :     assert(nValueNo < nLength);
     178             : 
     179        4073 :     sal_Int16 nIndex = pSequenceIndex[ nValueNo ];
     180        4073 :     return ( nIndex != -1 ) ? pValues[ nIndex ] : aEmptyAny;
     181             : }
     182             : 
     183        5381 : bool MultiPropertySetHelper::hasProperty( sal_Int16 nValueNo )
     184             : {
     185             :     assert(pSequenceIndex && "called hasProperty() without calling hasProperties()");
     186             :     assert(nValueNo < nLength);
     187             : 
     188        5381 :     return pSequenceIndex[ nValueNo ] != -1;
     189             : }
     190             : 
     191             : #endif
     192             : 
     193             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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