1 files changed, 141 insertions, 0 deletions
diff --git a/include/comphelper/proparrhlp.hxx b/include/comphelper/proparrhlp.hxx
new file mode 100644
index 000000000..a53b718c2
--- /dev/null
+++ b/include/comphelper/proparrhlp.hxx
@@ -0,0 +1,141 @@
+/* -*- 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 <osl/mutex.hxx>
+#include <osl/diagnose.h>
+#include <rtl/instance.hxx>
+
+namespace comphelper
+{
+
+template <typename TYPE> struct OPropertyArrayUsageHelperMutex
+    : public rtl::Static< ::osl::Mutex, OPropertyArrayUsageHelperMutex<TYPE> > {};
+
+template <class TYPE>
+class OPropertyArrayUsageHelper
+{
+protected:
+    static sal_Int32                        s_nRefCount;
+    static ::cppu::IPropertyArrayHelper*    s_pProps;
+
+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;
+};
+
+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()
+{
+    ::osl::MutexGuard aGuard(OPropertyArrayUsageHelperMutex<TYPE>::get());
+    ++s_nRefCount;
+}
+
+template <class TYPE>
+OPropertyArrayUsageHelper<TYPE>::~OPropertyArrayUsageHelper()
+{
+    ::osl::MutexGuard aGuard(OPropertyArrayUsageHelperMutex<TYPE>::get());
+    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(OPropertyArrayUsageHelperMutex<TYPE>::get());
+        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: */