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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 :
20 :
21 : #include <xmloff/unointerfacetouniqueidentifiermapper.hxx>
22 :
23 : using namespace ::com::sun::star;
24 : using ::com::sun::star::uno::Reference;
25 : using ::com::sun::star::uno::XInterface;
26 : using ::rtl::OUString;
27 :
28 : namespace comphelper
29 : {
30 :
31 952 : UnoInterfaceToUniqueIdentifierMapper::UnoInterfaceToUniqueIdentifierMapper()
32 952 : : mnNextId( 1 )
33 : {
34 952 : }
35 :
36 : /** returns a unique identifier for the given uno object. IF a uno object is
37 : registered more than once, the returned identifier is always the same.
38 : */
39 0 : const OUString& UnoInterfaceToUniqueIdentifierMapper::registerReference( const Reference< XInterface >& rInterface )
40 : {
41 : // Be certain that the references we store in our table are to the
42 : // leading / primary XInterface - cf. findReference
43 0 : uno::Reference< uno::XInterface > xRef( rInterface, uno::UNO_QUERY );
44 :
45 0 : IdMap_t::const_iterator aIter;
46 0 : if( findReference( xRef, aIter ) )
47 : {
48 0 : return (*aIter).first;
49 : }
50 : else
51 : {
52 0 : OUString aId( "id" );
53 0 : aId += OUString::valueOf( mnNextId++ );
54 0 : return (*maEntries.insert( IdMap_t::value_type( aId, xRef ) ).first).first;
55 0 : }
56 : }
57 :
58 : /** registers the given uno object with the given identifier.
59 :
60 : @returns
61 : false, if the given identifier already exists and is not associated with the given interface
62 : */
63 0 : bool UnoInterfaceToUniqueIdentifierMapper::registerReference( const OUString& rIdentifier, const Reference< XInterface >& rInterface )
64 : {
65 0 : IdMap_t::const_iterator aIter;
66 :
67 : // Be certain that the references we store in our table are to the
68 : // leading / primary XInterface - cf. findReference
69 0 : uno::Reference< uno::XInterface > xRef( rInterface, uno::UNO_QUERY );
70 :
71 0 : if( findReference( xRef, aIter ) )
72 : {
73 0 : return rIdentifier != (*aIter).first;
74 : }
75 0 : else if( findIdentifier( rIdentifier, aIter ) )
76 : {
77 0 : return false;
78 : }
79 : else
80 : {
81 0 : maEntries.insert( IdMap_t::value_type( rIdentifier, xRef ) );
82 :
83 : // see if this is a reference like something we would generate in the future
84 0 : const sal_Unicode *p = rIdentifier.getStr();
85 0 : sal_Int32 nLength = rIdentifier.getLength();
86 :
87 : // see if the identifier is 'id' followed by a pure integer value
88 0 : if( nLength < 2 || p[0] != 'i' || p[1] != 'd' )
89 0 : return true;
90 :
91 0 : nLength -= 2;
92 0 : p += 2;
93 :
94 0 : while(nLength--)
95 : {
96 0 : if( (*p < '0') || (*p > '9') )
97 0 : return true; // a custom id, that will never conflict with genereated id's
98 :
99 0 : p++;
100 : }
101 :
102 : // the identifier is a pure integer value
103 : // so we make sure we will never generate
104 : // an integer value like this one
105 0 : sal_Int32 nId = rIdentifier.copy(2).toInt32();
106 0 : if( mnNextId <= nId )
107 0 : mnNextId = nId + 1;
108 :
109 0 : return true;
110 0 : }
111 : }
112 :
113 : /** @returns
114 : the identifier for the given uno object. If this uno object is not already
115 : registered, an empty string is returned
116 : */
117 20 : const OUString& UnoInterfaceToUniqueIdentifierMapper::getIdentifier( const Reference< XInterface >& rInterface ) const
118 : {
119 20 : IdMap_t::const_iterator aIter;
120 20 : if( findReference( rInterface, aIter ) )
121 : {
122 0 : return (*aIter).first;
123 : }
124 : else
125 : {
126 20 : static const OUString aEmpty;
127 20 : return aEmpty;
128 : }
129 : }
130 :
131 : /** @returns
132 : the uno object that is registered with the given identifier. If no uno object
133 : is registered with the given identifier, an empty reference is returned.
134 : */
135 0 : const Reference< XInterface >& UnoInterfaceToUniqueIdentifierMapper::getReference( const OUString& rIdentifier ) const
136 : {
137 0 : IdMap_t::const_iterator aIter;
138 0 : if( findIdentifier( rIdentifier, aIter ) )
139 : {
140 0 : return (*aIter).second;
141 : }
142 : else
143 : {
144 0 : static const Reference< XInterface > aEmpty;
145 0 : return aEmpty;
146 : }
147 : }
148 :
149 20 : bool UnoInterfaceToUniqueIdentifierMapper::findReference( const Reference< XInterface >& rInterface, IdMap_t::const_iterator& rIter ) const
150 : {
151 20 : uno::Reference< uno::XInterface > xRef( rInterface, uno::UNO_QUERY );
152 :
153 20 : rIter = maEntries.begin();
154 :
155 20 : const IdMap_t::const_iterator aEnd( maEntries.end() );
156 40 : while( rIter != aEnd )
157 : {
158 : // The Reference == operator, does a repeated queryInterface on
159 : // this to ensure we got the right XInterface base-class. However,
160 : // we can be sure that this has been done already by the time we
161 : // get to here.
162 0 : if( (*rIter).second.get() == xRef.get() )
163 0 : return true;
164 :
165 0 : rIter++;
166 : }
167 :
168 20 : return false;
169 : }
170 :
171 0 : bool UnoInterfaceToUniqueIdentifierMapper::findIdentifier( const OUString& rIdentifier, IdMap_t::const_iterator& rIter ) const
172 : {
173 0 : rIter = maEntries.find( rIdentifier );
174 0 : return rIter != maEntries.end();
175 : }
176 :
177 : }
178 :
179 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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