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3 * Licensed to the Apache Software Foundation (ASF) under one
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16 * KIND, either express or implied. See the License for the
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18 * under the License.
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21
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24
25 // MARKER(update_precomp.py): autogen include statement, do not remove
26 #include "precompiled_xmloff.hxx"
27 #include "unointerfacetouniqueidentifiermapper.hxx"
28
29 using ::com::sun::star::uno::Reference;
30 using ::com::sun::star::uno::XInterface;
31 using ::rtl::OUString;
32
33 namespace comphelper
34 {
35
UnoInterfaceToUniqueIdentifierMapper()36 UnoInterfaceToUniqueIdentifierMapper::UnoInterfaceToUniqueIdentifierMapper()
37 : mnNextId( 1 )
38 {
39 }
40
41 /** returns a unique identifier for the given uno object. IF a uno object is
42 registered more than once, the returned identifier is always the same.
43 */
registerReference(const Reference<XInterface> & rInterface)44 const OUString& UnoInterfaceToUniqueIdentifierMapper::registerReference( const Reference< XInterface >& rInterface )
45 {
46 IdMap_t::const_iterator aIter;
47 if( findReference( rInterface, aIter ) )
48 {
49 return (*aIter).first;
50 }
51 else
52 {
53 OUString aId( RTL_CONSTASCII_USTRINGPARAM( "id" ) );
54 aId += OUString::valueOf( mnNextId++ );
55 return (*maEntries.insert( IdMap_t::value_type( aId, rInterface ) ).first).first;
56 }
57 }
58
59 /** registers the given uno object with the given identifier.
60
61 @returns
62 false, if the given identifier already exists and is not associated with the given interface
63 */
registerReference(const OUString & rIdentifier,const Reference<XInterface> & rInterface)64 bool UnoInterfaceToUniqueIdentifierMapper::registerReference( const OUString& rIdentifier, const Reference< XInterface >& rInterface )
65 {
66 IdMap_t::const_iterator aIter;
67 if( findReference( rInterface, aIter ) )
68 {
69 return rIdentifier != (*aIter).first;
70 }
71 else if( findIdentifier( rIdentifier, aIter ) )
72 {
73 return false;
74 }
75 else
76 {
77 maEntries.insert( IdMap_t::value_type( rIdentifier, rInterface ) );
78
79 // see if this is a reference like something we would generate in the future
80 const sal_Unicode *p = rIdentifier.getStr();
81 sal_Int32 nLength = rIdentifier.getLength();
82
83 // see if the identifier is 'id' followed by a pure integer value
84 if( nLength < 2 || p[0] != 'i' || p[1] != 'd' )
85 return true;
86
87 nLength -= 2;
88 p += 2;
89
90 while(nLength--)
91 {
92 if( (*p < '0') || (*p > '9') )
93 return true; // a custom id, that will never conflict with genereated id's
94
95 p++;
96 }
97
98 // the identifier is a pure integer value
99 // so we make sure we will never generate
100 // an integer value like this one
101 sal_Int32 nId = rIdentifier.copy(2).toInt32();
102 if( mnNextId <= nId )
103 mnNextId = nId + 1;
104
105 return true;
106 }
107 }
108
109 /** @returns
110 the identifier for the given uno object. If this uno object is not already
111 registered, an empty string is returned
112 */
getIdentifier(const Reference<XInterface> & rInterface) const113 const OUString& UnoInterfaceToUniqueIdentifierMapper::getIdentifier( const Reference< XInterface >& rInterface ) const
114 {
115 IdMap_t::const_iterator aIter;
116 if( findReference( rInterface, aIter ) )
117 {
118 return (*aIter).first;
119 }
120 else
121 {
122 static const OUString aEmpty;
123 return aEmpty;
124 }
125 }
126
127 /** @returns
128 the uno object that is registered with the given identifier. If no uno object
129 is registered with the given identifier, an empty reference is returned.
130 */
getReference(const OUString & rIdentifier) const131 const Reference< XInterface >& UnoInterfaceToUniqueIdentifierMapper::getReference( const OUString& rIdentifier ) const
132 {
133 IdMap_t::const_iterator aIter;
134 if( findIdentifier( rIdentifier, aIter ) )
135 {
136 return (*aIter).second;
137 }
138 else
139 {
140 static const Reference< XInterface > aEmpty;
141 return aEmpty;
142 }
143 }
144
findReference(const Reference<XInterface> & rInterface,IdMap_t::const_iterator & rIter) const145 bool UnoInterfaceToUniqueIdentifierMapper::findReference( const Reference< XInterface >& rInterface, IdMap_t::const_iterator& rIter ) const
146 {
147 rIter = maEntries.begin();
148 const IdMap_t::const_iterator aEnd( maEntries.end() );
149 while( rIter != aEnd )
150 {
151 if( (*rIter).second == rInterface )
152 return true;
153
154 rIter++;
155 }
156
157 return false;
158 }
159
findIdentifier(const OUString & rIdentifier,IdMap_t::const_iterator & rIter) const160 bool UnoInterfaceToUniqueIdentifierMapper::findIdentifier( const OUString& rIdentifier, IdMap_t::const_iterator& rIter ) const
161 {
162 rIter = maEntries.find( rIdentifier );
163 return rIter != maEntries.end();
164 }
165
166 }
167
168