1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 #ifndef CONNECTIVITY_SKIPDELETEDSSET_HXX 24 #define CONNECTIVITY_SKIPDELETEDSSET_HXX 25 26 #include "TResultSetHelper.hxx" 27 #include <rtl/alloc.h> 28 #include <hash_map> 29 #include <vector> 30 #include "connectivity/dbtoolsdllapi.hxx" 31 32 namespace connectivity 33 { 34 /** 35 the class OSkipDeletedSet supports a general method to skip deleted rows 36 */ 37 class OOO_DLLPUBLIC_DBTOOLS OSkipDeletedSet 38 { 39 ::std::vector<sal_Int32> m_aBookmarksPositions;// vector of iterators to position map, the order is the logical position 40 IResultSetHelper* m_pHelper; // used for moving in the resultset 41 bool m_bDeletedVisible; 42 43 sal_Bool moveAbsolute(sal_Int32 _nOffset,sal_Bool _bRetrieveData); 44 public: 45 OSkipDeletedSet(IResultSetHelper* _pHelper); 46 ~OSkipDeletedSet(); 47 operator new(size_t nSize)48 inline static void * SAL_CALL operator new( size_t nSize ) SAL_THROW( () ) 49 { return ::rtl_allocateMemory( nSize ); } operator new(size_t,void * _pHint)50 inline static void * SAL_CALL operator new( size_t,void* _pHint ) SAL_THROW( () ) 51 { return _pHint; } operator delete(void * pMem)52 inline static void SAL_CALL operator delete( void * pMem ) SAL_THROW( () ) 53 { ::rtl_freeMemory( pMem ); } operator delete(void *,void *)54 inline static void SAL_CALL operator delete( void *,void* ) SAL_THROW( () ) 55 { } 56 57 /** 58 skipDeleted moves the resultset to the position defined by the parameters 59 it garantees that the row isn't deleted 60 @param 61 IResultSetHelper::Movement _eCursorPosition in which direction the resultset should be moved 62 sal_Int32 _nOffset the position relativ to the movement 63 sal_Bool _bRetrieveData is true when the current row should be filled which data 64 @return 65 true when the movement was successful otherwise false 66 */ 67 sal_Bool skipDeleted(IResultSetHelper::Movement _eCursorPosition, sal_Int32 _nOffset, sal_Bool _bRetrieveData); 68 /** 69 clear the map and the vector used in this class 70 */ 71 void clear(); 72 /** 73 getMappedPosition returns the mapped position of a logical position 74 @param 75 sal_Int32 _nBookmark the logical position 76 77 @return the mapped position 78 */ 79 sal_Int32 getMappedPosition(sal_Int32 _nBookmark) const; 80 /** 81 insertNewPosition adds a new position to the map 82 @param 83 sal_Int32 _nPos the logical position 84 */ 85 void insertNewPosition(sal_Int32 _nPos); 86 /** 87 deletePosition deletes this position from the map and decrement all following positions 88 @param 89 sal_Int32 _nPos the logical position 90 */ 91 void deletePosition(sal_Int32 _nPos); 92 /** 93 getLastPosition returns the last position 94 @return the last position 95 */ getLastPosition() const96 inline sal_Int32 getLastPosition() const { return m_aBookmarksPositions.size(); } SetDeletedVisible(bool _bDeletedVisible)97 inline void SetDeletedVisible(bool _bDeletedVisible) { m_bDeletedVisible = _bDeletedVisible; } 98 }; 99 } 100 #endif // CONNECTIVITY_SKIPDELETEDSSET_HXX 101 102