include/connectivity/sqlparse.hxx

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  14  *   ownership. The ASF licenses this file to you under the Apache
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  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 INCLUDED_CONNECTIVITY_SQLPARSE_HXX
  20 #define INCLUDED_CONNECTIVITY_SQLPARSE_HXX
  21
  22 #include <memory>
  23
  24 #include <com/sun/star/uno/Reference.h>
  25 #include <osl/mutex.hxx>
  26 #include <connectivity/sqlnode.hxx>
  27 #include <connectivity/IParseContext.hxx>
  28 #include <connectivity/dbtoolsdllapi.hxx>
  29 #include <connectivity/sqlerror.hxx>
  30 #include <salhelper/singletonref.hxx>
  31
  32 #include <map>
  33
  34 namespace com::sun::star::i18n { class XCharacterClassification; }
  35 namespace com::sun::star::i18n { class XLocaleData4; }
  36
  37 namespace com::sun::star
  38 {
  39     namespace beans
  40     {
  41         class XPropertySet;
  42     }
  43     namespace util
  44     {
  45         class XNumberFormatter;
  46     }
  47 }
  48
  49 namespace connectivity
  50 {
  51     class OSQLScanner;
  52
  53     //= OParseContext
  54
  55     class OParseContext final : public IParseContext
  56     {
  57     public:
  58         OParseContext();
  59
  60         virtual ~OParseContext();
  61         // retrieves language specific error messages
  62         virtual OUString getErrorMessage(ErrorCode _eCodes) const override;
  63
  64         // retrieves language specific keyword strings (only ASCII allowed)
  65         virtual OString getIntlKeywordAscii(InternationalKeyCode _eKey) const override;
  66
  67         // finds out, if we have an international keyword (only ASCII allowed)
  68         virtual InternationalKeyCode getIntlKeyCode(const OString& rToken) const override;
  69
  70         // determines the default international setting
  71         static const css::lang::Locale& getDefaultLocale();
  72
  73         /** gets a locale instance which should be used when parsing in the context specified by this instance
  74             <p>if this is not overridden by derived classes, it returns the static default locale.</p>
  75         */
  76         virtual css::lang::Locale getPreferredLocale( ) const override;
  77     };
  78
  79     // OSQLParseNodesContainer
  80     // garbage collection of nodes
  81
  82     class OSQLParseNodesContainer
  83     {
  84         ::osl::Mutex m_aMutex;
  85         ::std::vector< OSQLParseNode* > m_aNodes;
  86     public:
  87         OSQLParseNodesContainer();
  88         ~OSQLParseNodesContainer();
  89
  90         void push_back(OSQLParseNode* _pNode);
  91         void erase(OSQLParseNode* _pNode);
  92         void clear();
  93         void clearAndDelete();
  94     };
  95
  96     typedef salhelper::SingletonRef<OSQLParseNodesContainer> OSQLParseNodesGarbageCollector;
  97
  98     //= OSQLParser
  99
 100     struct OSQLParser_Data
 101     {
 102         css::lang::Locale               aLocale;
 103         ::connectivity::SQLError        aErrors;
 104     };
 105
 106     /** Parser for SQL92
 107     */
 108     class OOO_DLLPUBLIC_DBTOOLS OSQLParser
 109     {
 110         friend class OSQLParseNode;
 111         friend class OSQLInternalNode;
 112         friend struct SQLParseNodeParameter;
 113
 114     private:
 115         typedef ::std::map< sal_uInt32, OSQLParseNode::Rule >   RuleIDMap;
 116     //  static parts for parsers
 117         static sal_uInt32           s_nRuleIDs[OSQLParseNode::rule_count + 1];
 118         static RuleIDMap            s_aReverseRuleIDLookup;
 119         static OParseContext        s_aDefaultContext;
 120
 121         static OSQLScanner*                     s_pScanner;
 122         static OSQLParseNodesGarbageCollector*  s_pGarbageCollector;
 123         static sal_Int32                        s_nRefCount;
 124
 125     // information on the current parse action
 126         const IParseContext*        m_pContext;
 127         std::unique_ptr<OSQLParseNode> m_pParseTree;   // result from parsing
 128         ::std::unique_ptr< OSQLParser_Data >
 129                                     m_pData;
 130         OUString                     m_sFieldName;   // current field name for a predicate
 131         OUString                     m_sErrorMessage;// current error msg
 132
 133         css::uno::Reference< css::beans::XPropertySet >
 134                                     m_xField;       // current field
 135         css::uno::Reference< css::util::XNumberFormatter >
 136                                     m_xFormatter;   // current number formatter
 137         sal_Int32                   m_nFormatKey;   // numberformat, which should be used
 138         sal_Int32                   m_nDateFormatKey;
 139         css::uno::Reference< css::uno::XComponentContext >    m_xContext;
 140         css::uno::Reference< css::i18n::XCharacterClassification> m_xCharClass;
 141         static css::uno::Reference< css::i18n::XLocaleData4>       s_xLocaleData;
 142
 143         // convert a string into double trim it to scale of _nscale and then transform it back to string
 144         OUString stringToDouble(const OUString& _rValue,sal_Int16 _nScale);
 145         OSQLParseNode*  buildDate(sal_Int32 _nType,OSQLParseNode*& pLiteral);
 146         bool            extractDate(OSQLParseNode const * pLiteral,double& _rfValue);
 147         void            killThousandSeparator(OSQLParseNode* pLiteral);
 148         OSQLParseNode*  convertNode(sal_Int32 nType, OSQLParseNode* pLiteral);
 149         // makes a string out of a number, pLiteral will be deleted
 150         OSQLParseNode*  buildNode_STR_NUM(OSQLParseNode*& pLiteral);
 151         OSQLParseNode*  buildNode_Date(const double& fValue, sal_Int32 nType);
 152
 153         static ::osl::Mutex& getMutex();
 154
 155     public:
 156         // if NULL, a default context will be used
 157         // the context must live as long as the parser
 158         OSQLParser(const css::uno::Reference< css::uno::XComponentContext >& rxContext, const IParseContext* _pContext = nullptr);
 159         ~OSQLParser();
 160
 161         // Parsing an SQLStatement
 162         std::unique_ptr<OSQLParseNode> parseTree(OUString& rErrorMessage,
 163                        const OUString& rStatement,
 164                        bool bInternational = false);
 165
 166         // Check a Predicate
 167         // set bUseRealName to false if you pass a xField that comes from where you got that field,
 168         // as opposed from to from yourself.
 169         std::unique_ptr<OSQLParseNode> predicateTree(OUString& rErrorMessage, const OUString& rStatement,
 170                        const css::uno::Reference< css::util::XNumberFormatter > & xFormatter,
 171                        const css::uno::Reference< css::beans::XPropertySet > & xField,
 172                        bool bUseRealName = true);
 173
 174         // Access to the context
 175         const IParseContext& getContext() const {return *m_pContext;}
 176
 177         /// access to the SQLError instance owned by this parser
 178         const SQLError& getErrorHelper() const;
 179
 180         // TokenIDToStr: token name belonging to a token number.
 181         static OString TokenIDToStr(sal_uInt32 nTokenID, const IParseContext* pContext = nullptr);
 182
 183 #if OSL_DEBUG_LEVEL > 0
 184         // (empty string if not found)
 185         static OUString RuleIDToStr(sal_uInt32 nRuleID);
 186 #endif
 187
 188         // StrToRuleID calculates the RuleID for an OUString (that is, css::sdbcx::Index in yytname)
 189         // (0 if not found). The search for an ID based on a String is
 190         // extremely inefficient (sequential search for OUString)!
 191         static sal_uInt32 StrToRuleID(const OString & rValue);
 192
 193         static OSQLParseNode::Rule RuleIDToRule( sal_uInt32 _nRule );
 194
 195         // RuleId with enum, far more efficient
 196         static sal_uInt32 RuleID(OSQLParseNode::Rule eRule);
 197         // compares the _sFunctionName with all known function names and return the DataType of the return value
 198         static sal_Int32 getFunctionReturnType(const OUString& _sFunctionName, const IParseContext* pContext);
 199
 200         // returns the type for a parameter in a given function name
 201         static sal_Int32 getFunctionParameterType(sal_uInt32 _nTokenId,sal_uInt32 _nPos);
 202
 203         void error(const char *fmt);
 204         static int SQLlex();
 205 #ifdef YYBISON
 206         void setParseTree(OSQLParseNode * pNewParseTree);
 207
 208         // Is the parse in a special mode?
 209         // Predicate check is used to check a condition for a field
 210         bool inPredicateCheck() const {return m_xField.is();}
 211         const OUString& getFieldName() const {return m_sFieldName;}
 212
 213         static void reduceLiteral(OSQLParseNode*& pLiteral, bool bAppendBlank);
 214          // does not change the pLiteral argument
 215         sal_Int16 buildNode(OSQLParseNode*& pAppend,OSQLParseNode* pCompare,OSQLParseNode* pLiteral,OSQLParseNode* pLiteral2);
 216
 217         sal_Int16 buildComparisonRule(OSQLParseNode*& pAppend,OSQLParseNode* pLiteral);
 218         // pCompre will be deleted if it is not used
 219         sal_Int16 buildPredicateRule(OSQLParseNode*& pAppend,OSQLParseNode* const pLiteral,OSQLParseNode* pCompare,OSQLParseNode* pLiteral2 = nullptr);
 220
 221         sal_Int16 buildLikeRule(OSQLParseNode* pAppend, OSQLParseNode*& pLiteral, const OSQLParseNode* pEscape);
 222         sal_Int16 buildStringNodes(OSQLParseNode*& pLiteral);
 223 #endif
 224     };
 225 }
 226
 227 #endif // INCLUDED_CONNECTIVITY_SQLPARSE_HXX
 228
 229 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */