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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: MultiPropertySetHelper.hxx,v $
*
* $Revision: 1.6 $
*
* last change: $Author: rt $ $Date: 2005-09-09 12:38:11 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
************************************************************************/
#ifndef _XMLOFF_CONDITIONALMULTIPROPERTYSETHELPER_HXX
#define _XMLOFF_CONDITIONALMULTIPROPERTYSETHELPER_HXX
#ifndef _RTL_USTRING_HXX_
#include <rtl/ustring.hxx>
#endif
#ifndef _COM_SUN_STAR_UNO_SEQUENCE_HXX_
#include <com/sun/star/uno/Sequence.hxx>
#endif
#ifndef _TOOLS_DEBUG_HXX
#include <tools/debug.hxx>
#endif
namespace com { namespace sun { namespace star {
namespace beans { class XMultiPropertySet; }
namespace beans { class XPropertySet; }
namespace beans { class XPropertySetInfo; }
} } }
/**
* The MultiPropertySetHelper performs the follwing functions:
*
* Given a list of property names (as sal_Char** or OUString*), it can
* query an XMultiPropertySet (or XPropertySet) which of these properties
* it supports (method hasProperties(...)). The properties *MUST* be
* sorted alphabetically.
*
* Then, the X(Multi)PropertySet can be queried for values, and only
* the supported properties are queried. (method getValues(...)) The
* values are stored in the helper itself.
*
* Finally, each property can be queried for existence
* (method hasProperty(...)) or its value (method (getValue(...))).
*
* After some initial preparation (hasProperties, getValues) the
* MultiPropertySetHelper can be used similarly to an
* XPropertySet in that you can query the values in the places where you
* need them. However, if an XMultiPropertySet is supplied, the queries
* are more efficient, often significantly so.
*/
class MultiPropertySetHelper
{
/// names of all properties
::rtl::OUString* pPropertyNames;
/// length of pPropertyNames array
sal_Int16 nLength;
/// the sequence of property names that the current (multi)
/// property set implementation supports
::com::sun::star::uno::Sequence< ::rtl::OUString > aPropertySequence;
/// an array of indices that maps from pPropertyNames indices to
/// aPropertySequence indices
sal_Int16* pSequenceIndex;
/// the last set of values retrieved by getValues
::com::sun::star::uno::Sequence< ::com::sun::star::uno::Any > aValues;
/// result of aValues.getConstArray()
const ::com::sun::star::uno::Any* pValues;
/// an empty Any
::com::sun::star::uno::Any aEmptyAny;
public:
MultiPropertySetHelper( const sal_Char** pNames );
MultiPropertySetHelper( const ::rtl::OUString* pNames );
~MultiPropertySetHelper();
/**
* Call hasPropertiesByName for the provided XPropertySetInfo and build
* list of allowed properties.
*/
void hasProperties( const ::com::sun::star::uno::Reference<
::com::sun::star::beans::XPropertySetInfo> & );
/**
* Return whether hasProperties was called
* (i.e. if we are ready to call getValues)
*/
sal_Bool checkedProperties();
/**
* Get values from the XMultiPropertySet.
*
* May only be called after hasProperties() was called for the
* appropriate XPropertySetInfo.
*/
void getValues( const ::com::sun::star::uno::Reference<
::com::sun::star::beans::XMultiPropertySet> & );
/**
* Get values from the XPropertySet. This can be much slower than
* getValues( const Reference<XMultiPropertySet& ) and hence
* should be avoided.
*
* May only be called after hasProperties() was called for the
* appropriate XPropertySetInfo.
*/
void getValues( const ::com::sun::star::uno::Reference<
::com::sun::star::beans::XPropertySet> & );
/**
* Get a value from the values array.
*
* May only be called after getValues() was called.
*/
inline const ::com::sun::star::uno::Any& getValue( sal_Int16 nIndex );
/**
* Find out if this property is supported.
*
* May only be called after hasProperties() was called.
*/
inline sal_Bool hasProperty( sal_Int16 nIndex );
/**
* Get a value from the XPropertySet on demand.
*
* If neither getValues nor getValueOnDemand has been called already
* after the last call to resetValues, the values are retrieved
* using getValues. Otherwise the value already retrieved is returned.
* In case XMultiPropertySet is supported by the XPropertySet and
* bTryMult is set, the XMultiPropertySet is used to get the values.
*
*/
const ::com::sun::star::uno::Any& getValue( sal_Int16 nIndex,
const ::com::sun::star::uno::Reference<
::com::sun::star::beans::XPropertySet> &,
sal_Bool bTryMulti = sal_False );
/**
* Get a value from the XMultiPropertySet on demand.
*
* If neither getValues nor getValueOnDemand has been called already
* after the last call to resetValues, the values are retrieved
* using getValues. Otherwise the value already retrieved is returned.
* In case XMultiPropertySet is supported by the XPropertySet,
* XMultiPropertySet is used to get the values.
*
*/
const ::com::sun::star::uno::Any& getValue( sal_Int16 nIndex,
const ::com::sun::star::uno::Reference<
::com::sun::star::beans::XMultiPropertySet> & );
inline void resetValues() { pValues = 0; }
};
// inline implementations of the often-called methods getValue and hasProperty:
const ::com::sun::star::uno::Any& MultiPropertySetHelper::getValue(
sal_Int16 nValueNo )
{
DBG_ASSERT( pValues != NULL,
"called getValue() without calling getValues() before");
DBG_ASSERT( pSequenceIndex != NULL,
"called getValue() without calling hasProperties() before" );
DBG_ASSERT( nValueNo < nLength, "index out of range" );
sal_Int16 nIndex = pSequenceIndex[ nValueNo ];
return ( nIndex != -1 ) ? pValues[ nIndex ] : aEmptyAny;
}
sal_Bool MultiPropertySetHelper::hasProperty( sal_Int16 nValueNo )
{
DBG_ASSERT( pSequenceIndex != NULL,
"called getValue() without calling hasProperties() before" );
DBG_ASSERT( nValueNo < nLength, "index out of range" );
return pSequenceIndex[ nValueNo ] != -1;
}
#endif
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