include/connectivity/sqlparse.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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 #include <string_view>
  24
  25 #include <com/sun/star/uno/Reference.h>
  26 #include <osl/mutex.hxx>
  27 #include <connectivity/sqlnode.hxx>
  28 #include <connectivity/IParseContext.hxx>
  29 #include <connectivity/dbtoolsdllapi.hxx>
  30 #include <connectivity/sqlerror.hxx>
  31 #include <salhelper/singletonref.hxx>
  32
  33 #include <map>
  34
  35 namespace com::sun::star::i18n { class XCharacterClassification; }
  36 namespace com::sun::star::i18n { class XLocaleData4; }
  37
  38 namespace com::sun::star
  39 {
  40     namespace beans
  41     {
  42         class XPropertySet;
  43     }
  44     namespace util
  45     {
  46         class XNumberFormatter;
  47     }
  48 }
  49
  50 namespace connectivity
  51 {
  52     class OSQLScanner;
  53
  54     //= OParseContext
  55
  56     class OParseContext final : public IParseContext
  57     {
  58     public:
  59         OParseContext();
  60
  61         virtual ~OParseContext();
  62         // retrieves language specific error messages
  63         virtual OUString getErrorMessage(ErrorCode _eCodes) const override;
  64
  65         // retrieves language specific keyword strings (only ASCII allowed)
  66         virtual OString getIntlKeywordAscii(InternationalKeyCode _eKey) const override;
  67
  68         // finds out, if we have an international keyword (only ASCII allowed)
  69         virtual InternationalKeyCode getIntlKeyCode(const OString& rToken) const override;
  70
  71         // determines the default international setting
  72         static const css::lang::Locale& getDefaultLocale();
  73
  74         /** gets a locale instance which should be used when parsing in the context specified by this instance
  75             <p>if this is not overridden by derived classes, it returns the static default locale.</p>
  76         */
  77         virtual css::lang::Locale getPreferredLocale( ) const override;
  78     };
  79
  80     // OSQLParseNodesContainer
  81     // garbage collection of nodes
  82
  83     class OSQLParseNodesContainer
  84     {
  85         ::osl::Mutex m_aMutex;
  86         ::std::vector< OSQLParseNode* > m_aNodes;
  87     public:
  88         OSQLParseNodesContainer();
  89         ~OSQLParseNodesContainer();
  90
  91         void push_back(OSQLParseNode* _pNode);
  92         void erase(OSQLParseNode* _pNode);
  93         void clear();
  94         void clearAndDelete();
  95     };
  96
  97     typedef salhelper::SingletonRef<OSQLParseNodesContainer> OSQLParseNodesGarbageCollector;
  98
  99     //= OSQLParser
 100
 101     struct OSQLParser_Data
 102     {
 103         css::lang::Locale               aLocale;
 104         ::connectivity::SQLError        aErrors;
 105     };
 106
 107     /** Parser for SQL92
 108     */
 109     class OOO_DLLPUBLIC_DBTOOLS OSQLParser
 110     {
 111         friend class OSQLParseNode;
 112         friend class OSQLInternalNode;
 113         friend struct SQLParseNodeParameter;
 114
 115     private:
 116         typedef ::std::map< sal_uInt32, OSQLParseNode::Rule >   RuleIDMap;
 117     //  static parts for parsers
 118         static sal_uInt32           s_nRuleIDs[OSQLParseNode::rule_count + 1];
 119         static RuleIDMap            s_aReverseRuleIDLookup;
 120         static OParseContext        s_aDefaultContext;
 121
 122         static OSQLScanner*                     s_pScanner;
 123         static OSQLParseNodesGarbageCollector*  s_pGarbageCollector;
 124         static sal_Int32                        s_nRefCount;
 125
 126     // information on the current parse action
 127         const IParseContext*        m_pContext;
 128         std::unique_ptr<OSQLParseNode> m_pParseTree;   // result from parsing
 129         ::std::unique_ptr< OSQLParser_Data >
 130                                     m_pData;
 131         OUString                     m_sFieldName;   // current field name for a predicate
 132         OUString                     m_sErrorMessage;// current error msg
 133
 134         css::uno::Reference< css::beans::XPropertySet >
 135                                     m_xField;       // current field
 136         css::uno::Reference< css::util::XNumberFormatter >
 137                                     m_xFormatter;   // current number formatter
 138         sal_Int32                   m_nFormatKey;   // numberformat, which should be used
 139         sal_Int32                   m_nDateFormatKey;
 140         css::uno::Reference< css::uno::XComponentContext >    m_xContext;
 141         css::uno::Reference< css::i18n::XCharacterClassification> m_xCharClass;
 142         static css::uno::Reference< css::i18n::XLocaleData4>       s_xLocaleData;
 143
 144         // convert a string into double trim it to scale of _nscale and then transform it back to string
 145         OUString stringToDouble(const OUString& _rValue,sal_Int16 _nScale);
 146         OSQLParseNode*  buildDate(sal_Int32 _nType,OSQLParseNode*& pLiteral);
 147         bool            extractDate(OSQLParseNode const * pLiteral,double& _rfValue);
 148         void            killThousandSeparator(OSQLParseNode* pLiteral);
 149         OSQLParseNode*  convertNode(sal_Int32 nType, OSQLParseNode* pLiteral);
 150         // makes a string out of a number, pLiteral will be deleted
 151         OSQLParseNode*  buildNode_STR_NUM(OSQLParseNode*& pLiteral);
 152         OSQLParseNode*  buildNode_Date(const double& fValue, sal_Int32 nType);
 153
 154         static ::osl::Mutex& getMutex();
 155
 156     public:
 157         // if NULL, a default context will be used
 158         // the context must live as long as the parser
 159         OSQLParser(const css::uno::Reference< css::uno::XComponentContext >& rxContext, const IParseContext* _pContext = nullptr);
 160         ~OSQLParser();
 161
 162         // Parsing an SQLStatement
 163         std::unique_ptr<OSQLParseNode> parseTree(OUString& rErrorMessage,
 164                        const OUString& rStatement,
 165                        bool bInternational = false);
 166
 167         // Check a Predicate
 168         // set bUseRealName to false if you pass a xField that comes from where you got that field,
 169         // as opposed from to from yourself.
 170         std::unique_ptr<OSQLParseNode> predicateTree(OUString& rErrorMessage, const OUString& rStatement,
 171                        const css::uno::Reference< css::util::XNumberFormatter > & xFormatter,
 172                        const css::uno::Reference< css::beans::XPropertySet > & xField,
 173                        bool bUseRealName = true);
 174
 175         // Access to the context
 176         const IParseContext& getContext() const {return *m_pContext;}
 177
 178         /// access to the SQLError instance owned by this parser
 179         const SQLError& getErrorHelper() const;
 180
 181         // TokenIDToStr: token name belonging to a token number.
 182         static OString TokenIDToStr(sal_uInt32 nTokenID, const IParseContext* pContext = nullptr);
 183
 184 #if OSL_DEBUG_LEVEL > 0
 185         // (empty string if not found)
 186         static OUString RuleIDToStr(sal_uInt32 nRuleID);
 187 #endif
 188
 189         // StrToRuleID calculates the RuleID for an OUString (that is, css::sdbcx::Index in yytname)
 190         // (0 if not found). The search for an ID based on a String is
 191         // extremely inefficient (sequential search for OUString)!
 192         static sal_uInt32 StrToRuleID(const OString & rValue);
 193
 194         static OSQLParseNode::Rule RuleIDToRule( sal_uInt32 _nRule );
 195
 196         // RuleId with enum, far more efficient
 197         static sal_uInt32 RuleID(OSQLParseNode::Rule eRule);
 198         // compares the _sFunctionName with all known function names and return the DataType of the return value
 199         static sal_Int32 getFunctionReturnType(std::u16string_view _sFunctionName, const IParseContext* pContext);
 200
 201         // returns the type for a parameter in a given function name
 202         static sal_Int32 getFunctionParameterType(sal_uInt32 _nTokenId,sal_uInt32 _nPos);
 203
 204         void error(const char *fmt);
 205         static int SQLlex();
 206 #ifdef YYBISON
 207         void setParseTree(OSQLParseNode * pNewParseTree);
 208
 209         // Is the parse in a special mode?
 210         // Predicate check is used to check a condition for a field
 211         bool inPredicateCheck() const {return m_xField.is();}
 212         const OUString& getFieldName() const {return m_sFieldName;}
 213
 214         static void reduceLiteral(OSQLParseNode*& pLiteral, bool bAppendBlank);
 215          // does not change the pLiteral argument
 216         sal_Int16 buildNode(OSQLParseNode*& pAppend,OSQLParseNode* pCompare,OSQLParseNode* pLiteral,OSQLParseNode* pLiteral2);
 217
 218         sal_Int16 buildComparisonRule(OSQLParseNode*& pAppend,OSQLParseNode* pLiteral);
 219         // pCompre will be deleted if it is not used
 220         sal_Int16 buildPredicateRule(OSQLParseNode*& pAppend,OSQLParseNode* const pLiteral,OSQLParseNode* pCompare,OSQLParseNode* pLiteral2 = nullptr);
 221
 222         sal_Int16 buildLikeRule(OSQLParseNode* pAppend, OSQLParseNode*& pLiteral, const OSQLParseNode* pEscape);
 223         sal_Int16 buildStringNodes(OSQLParseNode*& pLiteral);
 224 #endif
 225     };
 226 }
 227
 228 #endif // INCLUDED_CONNECTIVITY_SQLPARSE_HXX
 229
 230 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */