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/* -*- 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_UCBHELPER_PROVIDERHELPER_HXX
#define INCLUDED_UCBHELPER_PROVIDERHELPER_HXX
#include <vector>
#include <memory>
#include <com/sun/star/ucb/XContentProvider.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <cppuhelper/implbase.hxx>
#include <rtl/ref.hxx>
#include <ucbhelper/ucbhelperdllapi.h>
namespace com::sun::star::ucb {
class XPropertySetRegistry;
class XPersistentPropertySet;
}
namespace com::sun::star::uno { class XComponentContext; }
namespace ucbhelper_impl { struct ContentProviderImplHelper_Impl; }
namespace ucbhelper {
class ContentImplHelper;
typedef rtl::Reference< ContentImplHelper > ContentImplHelperRef;
typedef std::vector< ContentImplHelperRef > ContentRefList;
/**
* This is an abstract base class for implementations of the service
* com.sun.star.ucb.ContentProvider. It provides contents derived from
* class ucb::ContentImplHelper.
*
* Features of the base class implementation:
* - standard interfaces ( XInterface, XTypeProvider, XServiceInfo )
* - maintains a set of ContentImplHelper objects, which were created by
* the provider implementation. So there will be exactly one object for
* one Content Identifier.
* - Provides access to the Additional Core PropertySet of a content.
* ( These set contains the properties added to a content using its
* XPropertyContainer interface )
*/
class UCBHELPER_DLLPUBLIC ContentProviderImplHelper :
public cppu::WeakImplHelper<
css::lang::XServiceInfo,
css::ucb::XContentProvider>
{
friend class ContentImplHelper;
std::unique_ptr<ucbhelper_impl::ContentProviderImplHelper_Impl> m_pImpl;
protected:
osl::Mutex m_aMutex;
css::uno::Reference< css::uno::XComponentContext > m_xContext;
private:
UCBHELPER_DLLPRIVATE void removeContent( ContentImplHelper* pContent );
UCBHELPER_DLLPRIVATE css::uno::Reference< css::ucb::XPropertySetRegistry >
getAdditionalPropertySetRegistry();
UCBHELPER_DLLPRIVATE void cleanupRegisteredContents();
protected:
/**
* This method returns a content with the given id, if it already exists.
* Use this method in your "queryContent" implementation to ensure unique
* objects.
*
* @param Identifier is the content identifier, for that an existing
* content object is requested.
* @return the content with the given identifier, if it exists or 0, if it
* does not exist.
*/
rtl::Reference< ContentImplHelper >
queryExistingContent( const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier );
/**
* This method returns a content with the given URL, if it already exists.
*
* @param rURL is the URL ( content identifier string ), for that an
* existing content object is requested.
* @return the content with the given URL, if it exists or 0, if it
* does not exist.
*/
rtl::Reference< ContentImplHelper >
queryExistingContent( const OUString& rURL );
/**
* This method registers a newly created content instance with the
* content provider. It should be called directly after creating a new
* content instance. The provider can reuse a registered instance upon
* subsequent requests for content instances with an identifier
* of a registered instance.
* Note that the provider does not hold a hard reference on the
* registered instance. If last external reference is gone, the provider
* will remove the instance from its inventory of known instances.
* Nothing will happen in case an already registered instance shall
* be registered more than once.
*
* @param the content instance that is to be registered.
*/
void registerNewContent(
const css::uno::Reference< css::ucb::XContent > & xContent );
public:
// Construction/Destruction
ContentProviderImplHelper(
const css::uno::Reference< css::uno::XComponentContext >& rxContext );
virtual ~ContentProviderImplHelper() override;
// XServiceInfo
virtual OUString SAL_CALL
getImplementationName() override = 0;
virtual sal_Bool SAL_CALL
supportsService( const OUString& ServiceName ) override;
virtual css::uno::Sequence< OUString > SAL_CALL
getSupportedServiceNames() override = 0;
// XContentProvider
/**
* This method returns a content with the requested id.
*
* The implementation should:
*
* - Check, whether the Identifier is valid ( URL syntax ).
* - Use queryExistingContent(...) to determine, whether there exists
* already a content with the given id.
* - Return the possibly existing content.Create and return a new
* content, otherwise
*/
virtual css::uno::Reference< css::ucb::XContent > SAL_CALL
queryContent( const css::uno::Reference< css::ucb::XContentIdentifier >& Identifier ) override = 0;
virtual sal_Int32 SAL_CALL
compareContentIds( const css::uno::Reference< css::ucb::XContentIdentifier >& Id1,
const css::uno::Reference< css::ucb::XContentIdentifier >& Id2 ) override;
// Non-interface methods.
/**
* This method returns a mutex, which protects the content list of the
* provider. So you can prevent modifications of that list easily.
*
* @return the mutex.
*/
osl::Mutex& getContentListMutex() { return m_aMutex; }
/**
* This method fills a list with all contents existing at calling time.
* Note: You may prevent modifications of the content list at any time
* by acquiring the content list mutex of the provider.
*
* @param rContents is the list to fill with the children.
*/
void queryExistingContents( ContentRefList& rContents );
/**
* This method returns the propertyset containing the Additional Core
* Properties of a content.
*
* @param rKey is the key for the propertyset.
* @param bCreate is a flag indicating whether the propertyset shall
* be created in case it does not exist.
* @return the propertyset containing the Additional Core Properties.
*/
css::uno::Reference< css::ucb::XPersistentPropertySet >
getAdditionalPropertySet( const OUString& rKey, bool bCreate );
/**
* This method renames the propertyset containing the Additional Core
* Properties of a content.
*
* @param rOldKey is the old key of the propertyset.
* @param rNewKey is the new key for the propertyset.
* @param bRecursive is a flag indicating whether propertysets for
* children described by rOldKey shall be renamed, too.
* @return True, if the operation succeeded - False, otherwise.
*/
bool renameAdditionalPropertySet( const OUString& rOldKey,
const OUString& rNewKey,
bool bRecursive );
/**
* This method copies the propertyset containing the Additional Core
* Properties of a content.
*
* @param rSourceKey is the key of the source propertyset.
* @param rTargetKey is the key of the target propertyset.
* @param bRecursive is a flag indicating whether propertysets for
* children described by rSourceKey shall be copied, too.
* @return True, if the operation succeeded - False, otherwise.
*/
bool copyAdditionalPropertySet( const OUString& rSourceKey,
const OUString& rTargetKey,
bool bRecursive );
/**
* This method removes the propertyset containing the Additional Core
* Properties of a content.
*
* @param rKey is the key of the propertyset.
* @param bRecursive is a flag indicating whether propertysets for
* children described by rOldKey shall be removed, too.
* @return True, if the operation succeeded - False, otherwise.
*/
bool removeAdditionalPropertySet( const OUString& rKey,
bool bRecursive );
};
} // namespace ucbhelper
#endif /* ! INCLUDED_UCBHELPER_PROVIDERHELPER_HXX */
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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