Quelle proparrhlp.hxx Sprache: C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
*   Licensed to the Apache Software Foundation (ASF) under one or more
*   contributor license agreements. See the NOTICE file distributed
*   with this work for additional information regarding copyright
*   ownership. The ASF licenses this file to you under the Apache
*   License, Version 2.0 (the "License"); you may not use this file
*   except in compliance with the License. You may obtain a copy of
*   the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/

#ifndef INCLUDED_COMPHELPER_PROPARRHLP_HXX
#define INCLUDED_COMPHELPER_PROPARRHLP_HXX

#include <comphelper/propagg.hxx>
#include <cppuhelper/propshlp.hxx>
#include <mutex>
#include <osl/diagnose.h>

namespace comphelper
{

template <class TYPE>
class OPropertyArrayUsageHelper
{
protected:
    static sal_Int32                        s_nRefCount;
    static ::cppu::IPropertyArrayHelper*    s_pProps;
    static std::mutex& theMutex()
    {
        static std::mutex SINGLETON;
        return SINGLETON;
    }
public:
    OPropertyArrayUsageHelper();
    virtual ~OPropertyArrayUsageHelper();

    /** call this in the getInfoHelper method of your derived class. The method returns the array helper of the
        class, which is created if necessary.
    */
    ::cppu::IPropertyArrayHelper*   getArrayHelper();

protected:
    /** used to implement the creation of the array helper which is shared amongst all instances of the class.
        This method needs to be implemented in derived classes.
        <BR>
        The method gets called with Mutex acquired.
        @return                         a pointer to the newly created array helper. Must not be NULL.
    */
    virtual ::cppu::IPropertyArrayHelper* createArrayHelper( ) const = 0;
};

/** an OPropertyArrayUsageHelper which will create an OPropertyArrayAggregationHelper
*/
template <class TYPE>
class OAggregationArrayUsageHelper: public OPropertyArrayUsageHelper<TYPE>
{
protected:
    /** overwrite this in your derived class. initialize the two sequences with your and your aggregate's
        properties.
        <BR>
        The method gets called with Mutex acquired.
        @param      _rProps             out parameter to be filled with the property descriptions of your own class
        @param      _rAggregateProps    out parameter to be filled with the properties of your aggregate.
    */
    virtual void fillProperties(
        css::uno::Sequence< css::beans::Property >& /* [out] */ _rProps,
        css::uno::Sequence< css::beans::Property >& /* [out] */ _rAggregateProps
        ) const = 0;

    /** creates an OPropertyArrayAggregationHelper filled with properties for which's initialization
        fillProperties is called. getInfoService and getFirstAggregateId may be overwritten to determine
        the additional parameters of the OPropertyArrayAggregationHelper.
    */
    virtual ::cppu::IPropertyArrayHelper* createArrayHelper( ) const final;
};

template<class TYPE>
sal_Int32                       OPropertyArrayUsageHelper< TYPE >::s_nRefCount  = 0;

template<class TYPE>
::cppu::IPropertyArrayHelper*   OPropertyArrayUsageHelper< TYPE >::s_pProps = nullptr;

template <class TYPE>
OPropertyArrayUsageHelper<TYPE>::OPropertyArrayUsageHelper()
{
    std::unique_lock aGuard(theMutex());
    ++s_nRefCount;
}

template <class TYPE>
OPropertyArrayUsageHelper<TYPE>::~OPropertyArrayUsageHelper()
{
    std::unique_lock aGuard(theMutex());
    OSL_ENSURE(s_nRefCount > 0, "OPropertyArrayUsageHelper::~OPropertyArrayUsageHelper : suspicious call : have a refcount of 0 !");
    if (!--s_nRefCount)
    {
        delete s_pProps;
        s_pProps = nullptr;
    }
}

template <class TYPE>
::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::getArrayHelper()
{
    OSL_ENSURE(s_nRefCount, "OPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
    std::unique_lock aGuard(theMutex());
    if (!s_pProps)
    {
        s_pProps = createArrayHelper();
        OSL_ENSURE(s_pProps, "OPropertyArrayUsageHelper::getArrayHelper : createArrayHelper returned nonsense !");
    }
    return s_pProps;
}

template <class TYPE> inline
::cppu::IPropertyArrayHelper* OAggregationArrayUsageHelper<TYPE>::createArrayHelper() const
{
    css::uno::Sequence< css::beans::Property > aProps;
    css::uno::Sequence< css::beans::Property > aAggregateProps;
    fillProperties(aProps, aAggregateProps);
    OSL_ENSURE(aProps.hasElements(), "OAggregationArrayUsageHelper::createArrayHelper : fillProperties returned nonsense !");
    return new OPropertyArrayAggregationHelper(aProps, aAggregateProps, nullptr, DEFAULT_AGGREGATE_PROPERTY_ID);
}

}

#endif // INCLUDED_COMPHELPER_PROPARRHLP_HXX

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

quality100%

¤ Dauer der Verarbeitung: 0.29 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.