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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 : #ifndef COMPHELPER_IDPROPERTYARRAYUSAGEHELPER_HXX
20 : #define COMPHELPER_IDPROPERTYARRAYUSAGEHELPER_HXX
21 :
22 : #include <cppuhelper/component.hxx>
23 : #include <osl/mutex.hxx>
24 : #include <cppuhelper/interfacecontainer.hxx>
25 : #include <osl/diagnose.h>
26 : #include <comphelper/stl_types.hxx>
27 : #include <rtl/instance.hxx>
28 : #include <cppuhelper/propshlp.hxx>
29 :
30 : namespace cppu { class IPropertyArrayHelper; }
31 :
32 : namespace comphelper
33 : {
34 : //************************************************************
35 : // OIdPropertyArrayUsageHelper
36 : //************************************************************
37 : template <typename TYPE> struct OIdPropertyArrayUsageHelperMutex
38 : : public rtl::Static< ::osl::Mutex, OIdPropertyArrayUsageHelperMutex<TYPE> > {};
39 :
40 : typedef std::map< sal_Int32, ::cppu::IPropertyArrayHelper*, std::less< sal_Int32 > > OIdPropertyArrayMap;
41 : template <class TYPE>
42 : class OIdPropertyArrayUsageHelper
43 : {
44 : protected:
45 : static sal_Int32 s_nRefCount;
46 : static OIdPropertyArrayMap* s_pMap;
47 :
48 : public:
49 : OIdPropertyArrayUsageHelper();
50 0 : virtual ~OIdPropertyArrayUsageHelper()
51 : {
52 0 : ::osl::MutexGuard aGuard(OIdPropertyArrayUsageHelperMutex<TYPE>::get());
53 : OSL_ENSURE(s_nRefCount > 0, "OIdPropertyArrayUsageHelper::~OIdPropertyArrayUsageHelper : suspicious call : have a refcount of 0 !");
54 0 : if (!--s_nRefCount)
55 : {
56 : // delete the element
57 0 : for (OIdPropertyArrayMap::iterator i = s_pMap->begin(); i != s_pMap->end(); ++i)
58 0 : delete (*i).second;
59 0 : delete s_pMap;
60 0 : s_pMap = NULL;
61 : }
62 0 : }
63 :
64 : /** call this in the getInfoHelper method of your derived class. The method returns the array helper of the
65 : class, which is created if neccessary.
66 : */
67 : ::cppu::IPropertyArrayHelper* getArrayHelper(sal_Int32 nId);
68 :
69 : protected:
70 : /** used to implement the creation of the array helper which is shared amongst all instances of the class.
71 : This method needs to be implemented in derived classes.
72 : <BR>
73 : The method gets called with Mutex acquired.
74 : <BR>
75 : as long as IPropertyArrayHelper has no virtual destructor, the implementation of ~OPropertyArrayUsageHelper
76 : assumes that you created an ::cppu::OPropertyArrayHelper when deleting s_pProps.
77 : @return an pointer to the newly created array helper. Must not be NULL.
78 : */
79 : virtual ::cppu::IPropertyArrayHelper* createArrayHelper(sal_Int32 nId) const = 0;
80 : };
81 :
82 : //------------------------------------------------------------------
83 : template<class TYPE>
84 : sal_Int32 OIdPropertyArrayUsageHelper< TYPE >::s_nRefCount = 0;
85 :
86 : template<class TYPE>
87 : OIdPropertyArrayMap* OIdPropertyArrayUsageHelper< TYPE >::s_pMap = NULL;
88 :
89 : //------------------------------------------------------------------
90 : template <class TYPE>
91 79 : OIdPropertyArrayUsageHelper<TYPE>::OIdPropertyArrayUsageHelper()
92 : {
93 79 : ::osl::MutexGuard aGuard(OIdPropertyArrayUsageHelperMutex<TYPE>::get());
94 : // create the map if necessary
95 79 : if (s_pMap == NULL)
96 2 : s_pMap = new OIdPropertyArrayMap();
97 79 : ++s_nRefCount;
98 79 : }
99 :
100 : //------------------------------------------------------------------
101 : template <class TYPE>
102 374 : ::cppu::IPropertyArrayHelper* OIdPropertyArrayUsageHelper<TYPE>::getArrayHelper(sal_Int32 nId)
103 : {
104 : OSL_ENSURE(s_nRefCount, "OIdPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
105 374 : ::osl::MutexGuard aGuard(OIdPropertyArrayUsageHelperMutex<TYPE>::get());
106 : // do we have the array already?
107 374 : if (! (*s_pMap)[nId] )
108 : {
109 1 : (*s_pMap)[nId] = createArrayHelper(nId);
110 : OSL_ENSURE((*s_pMap)[nId], "OIdPropertyArrayUsageHelper::getArrayHelper : createArrayHelper returned nonsense !");
111 : }
112 374 : return (*s_pMap)[nId];
113 : }
114 : }
115 : #endif // COMPHELPER_IDPROPERTYARRAYUSAGEHELPER_HXX
116 :
117 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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