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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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 .
+ */
+
+#pragma once
+
+#include <cppuhelper/propshlp.hxx>
+#include <osl/diagnose.h>
+#include <osl/mutex.hxx>
+
+namespace cppu { class IPropertyArrayHelper; }
+namespace com::sun::star::lang { class XComponent; }
+
+namespace connectivity::firebird
+ {
+ /// @throws css::lang::DisposedException
+ void checkDisposed(bool _bThrow);
+
+
+ template <class TYPE>
+ class OPropertyArrayUsageHelper
+ {
+ protected:
+ static sal_Int32 s_nRefCount;
+ static ::cppu::IPropertyArrayHelper* s_pProps;
+ static ::osl::Mutex s_aMutex;
+
+ 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 s_aMutex acquired.
+ @return a pointer to the newly created array helper. Must not be NULL.
+ */
+ virtual ::cppu::IPropertyArrayHelper* createArrayHelper( ) const = 0;
+ };
+
+ template<class TYPE>
+ sal_Int32 OPropertyArrayUsageHelper< TYPE >::s_nRefCount = 0;
+
+ template<class TYPE>
+ ::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper< TYPE >::s_pProps = nullptr;
+
+ template<class TYPE>
+ ::osl::Mutex OPropertyArrayUsageHelper< TYPE >::s_aMutex;
+
+
+ template <class TYPE>
+ OPropertyArrayUsageHelper<TYPE>::OPropertyArrayUsageHelper()
+ {
+ ::osl::MutexGuard aGuard(s_aMutex);
+ ++s_nRefCount;
+ }
+
+
+ template <class TYPE>
+ OPropertyArrayUsageHelper<TYPE>::~OPropertyArrayUsageHelper()
+ {
+ ::osl::MutexGuard aGuard(s_aMutex);
+ 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 !");
+ if (!s_pProps)
+ {
+ ::osl::MutexGuard aGuard(s_aMutex);
+ if (!s_pProps)
+ {
+ s_pProps = createArrayHelper();
+ OSL_ENSURE(s_pProps, "OPropertyArrayUsageHelper::getArrayHelper : createArrayHelper returned nonsense !");
+ }
+ }
+ return s_pProps;
+ }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */