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
  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 #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
  38 {
  39     namespace sun
  40     {
  41         namespace star
  42         {
  43             namespace beans
  44             {
  45                 class XPropertySet;
  46             }
  47             namespace util
  48             {
  49                 class XNumberFormatter;
  50             }
  51         }
  52     }
  53 }
  54
  55 namespace connectivity
  56 {
  57     class OSQLScanner;
  58
  59     //= OParseContext
  60
  61     class OOO_DLLPUBLIC_DBTOOLS OParseContext : public IParseContext
  62     {
  63     public:
  64         OParseContext();
  65
  66         virtual ~OParseContext();
  67         // retrieves language specific error messages
  68         virtual OUString getErrorMessage(ErrorCode _eCodes) const override;
  69
  70         // retrieves language specific keyword strings (only ASCII allowed)
  71         virtual OString getIntlKeywordAscii(InternationalKeyCode _eKey) const override;
  72
  73         // finds out, if we have an international keyword (only ASCII allowed)
  74         virtual InternationalKeyCode getIntlKeyCode(const OString& rToken) const override;
  75
  76         // determines the default international setting
  77         static const css::lang::Locale& getDefaultLocale();
  78
  79         /** gets a locale instance which should be used when parsing in the context specified by this instance
  80             <p>if this is not overridden by derived classes, it returns the static default locale.</p>
  81         */
  82         virtual css::lang::Locale getPreferredLocale( ) const override;
  83     };
  84
  85     // OSQLParseNodesContainer
  86     // garbage collection of nodes
  87
  88     class OSQLParseNodesContainer
  89     {
  90         ::osl::Mutex m_aMutex;
  91         ::std::vector< OSQLParseNode* > m_aNodes;
  92     public:
  93         OSQLParseNodesContainer();
  94         ~OSQLParseNodesContainer();
  95
  96         void push_back(OSQLParseNode* _pNode);
  97         void erase(OSQLParseNode* _pNode);
  98         void clear();
  99         void clearAndDelete();
 100     };
 101
 102     typedef salhelper::SingletonRef<OSQLParseNodesContainer> OSQLParseNodesGarbageCollector;
 103
 104     //= OSQLParser
 105
 106     struct OSQLParser_Data
 107     {
 108         css::lang::Locale               aLocale;
 109         ::connectivity::SQLError        aErrors;
 110     };
 111
 112     /** Parser for SQL92
 113     */
 114     class OOO_DLLPUBLIC_DBTOOLS OSQLParser
 115     {
 116         friend class OSQLParseNode;
 117         friend class OSQLInternalNode;
 118         friend struct SQLParseNodeParameter;
 119
 120     private:
 121         typedef ::std::map< sal_uInt32, OSQLParseNode::Rule >   RuleIDMap;
 122     //  static parts for parsers
 123         static sal_uInt32           s_nRuleIDs[OSQLParseNode::rule_count + 1];
 124         static RuleIDMap            s_aReverseRuleIDLookup;
 125         static OParseContext        s_aDefaultContext;
 126
 127         static OSQLScanner*                     s_pScanner;
 128         static OSQLParseNodesGarbageCollector*  s_pGarbageCollector;
 129         static sal_Int32                        s_nRefCount;
 130
 131     // information on the current parse action
 132         const IParseContext*        m_pContext;
 133         std::unique_ptr<OSQLParseNode> m_pParseTree;   // result from parsing
 134         ::std::unique_ptr< OSQLParser_Data >
 135                                     m_pData;
 136         OUString                     m_sFieldName;   // current field name for a predicate
 137         OUString                     m_sErrorMessage;// current error msg
 138
 139         css::uno::Reference< css::beans::XPropertySet >
 140                                     m_xField;       // current field
 141         css::uno::Reference< css::util::XNumberFormatter >
 142                                     m_xFormatter;   // current number formatter
 143         sal_Int32                   m_nFormatKey;   // numberformat, which should be used
 144         sal_Int32                   m_nDateFormatKey;
 145         css::uno::Reference< css::uno::XComponentContext >    m_xContext;
 146         css::uno::Reference< css::i18n::XCharacterClassification> m_xCharClass;
 147         static css::uno::Reference< css::i18n::XLocaleData4>       s_xLocaleData;
 148
 149         // convert a string into double trim it to scale of _nscale and than transform it back to string
 150         OUString stringToDouble(const OUString& _rValue,sal_Int16 _nScale);
 151         OSQLParseNode*  buildDate(sal_Int32 _nType,OSQLParseNode*& pLiteral);
 152         bool            extractDate(OSQLParseNode const * pLiteral,double& _rfValue);
 153         void            killThousandSeparator(OSQLParseNode* pLiteral);
 154         OSQLParseNode*  convertNode(sal_Int32 nType, OSQLParseNode* pLiteral);
 155         // makes a string out of a number, pLiteral will be deleted
 156         OSQLParseNode*  buildNode_STR_NUM(OSQLParseNode*& pLiteral);
 157         OSQLParseNode*  buildNode_Date(const double& fValue, sal_Int32 nType);
 158
 159         static ::osl::Mutex& getMutex();
 160
 161     public:
 162         // if NULL, a default context will be used
 163         // the context must live as long as the parser
 164         OSQLParser(const css::uno::Reference< css::uno::XComponentContext >& rxContext, const IParseContext* _pContext = nullptr);
 165         ~OSQLParser();
 166
 167         // Parsing an SQLStatement
 168         std::unique_ptr<OSQLParseNode> parseTree(OUString& rErrorMessage,
 169                        const OUString& rStatement,
 170                        bool bInternational = false);
 171
 172         // Check a Predicate
 173         // set bUseRealName to false if you pass a xField that comes from where you got that field,
 174         // as opposed from to from yourself.
 175         std::unique_ptr<OSQLParseNode> predicateTree(OUString& rErrorMessage, const OUString& rStatement,
 176                        const css::uno::Reference< css::util::XNumberFormatter > & xFormatter,
 177                        const css::uno::Reference< css::beans::XPropertySet > & xField,
 178                        bool bUseRealName = true);
 179
 180         // Access to the context
 181         const IParseContext& getContext() const {return *m_pContext;}
 182
 183         /// access to the SQLError instance owned by this parser
 184         const SQLError& getErrorHelper() const;
 185
 186         // TokenIDToStr: token name belonging to a token number.
 187         static OString TokenIDToStr(sal_uInt32 nTokenID, const IParseContext* pContext = nullptr);
 188
 189 #if OSL_DEBUG_LEVEL > 0
 190         // (empty string if not found)
 191         static OUString RuleIDToStr(sal_uInt32 nRuleID);
 192 #endif
 193
 194         // StrToRuleID calculates the RuleID for a OUString (that is, css::sdbcx::Index in yytname)
 195         // (0 if not found). The search for an ID based on a String is
 196         // extremely inefficient (sequential search for OUString)!
 197         static sal_uInt32 StrToRuleID(const OString & rValue);
 198
 199         static OSQLParseNode::Rule RuleIDToRule( sal_uInt32 _nRule );
 200
 201         // RuleId with enum, far more efficient
 202         static sal_uInt32 RuleID(OSQLParseNode::Rule eRule);
 203         // compares the _sFunctionName with all known function names and return the DataType of the return value
 204         static sal_Int32 getFunctionReturnType(const OUString& _sFunctionName, const IParseContext* pContext);
 205
 206         // returns the type for a parameter in a given function name
 207         static sal_Int32 getFunctionParameterType(sal_uInt32 _nTokenId,sal_uInt32 _nPos);
 208
 209         void error(const sal_Char *fmt);
 210         static int SQLlex();
 211 #ifdef YYBISON
 212         void setParseTree(OSQLParseNode * pNewParseTree);
 213
 214         // Is the parse in a special mode?
 215         // Predicate check is used to check a condition for a field
 216         bool inPredicateCheck() const {return m_xField.is();}
 217         const OUString& getFieldName() const {return m_sFieldName;}
 218
 219         static void reduceLiteral(OSQLParseNode*& pLiteral, bool bAppendBlank);
 220          // does not change the pLiteral argument
 221         sal_Int16 buildNode(OSQLParseNode*& pAppend,OSQLParseNode* pCompare,OSQLParseNode* pLiteral,OSQLParseNode* pLiteral2);
 222
 223         sal_Int16 buildComparsionRule(OSQLParseNode*& pAppend,OSQLParseNode* pLiteral);
 224         // pCompre will be deleted if it is not used
 225         sal_Int16 buildPredicateRule(OSQLParseNode*& pAppend,OSQLParseNode* const pLiteral,OSQLParseNode* pCompare,OSQLParseNode* pLiteral2 = nullptr);
 226
 227         sal_Int16 buildLikeRule(OSQLParseNode* pAppend, OSQLParseNode*& pLiteral, const OSQLParseNode* pEscape);
 228         sal_Int16 buildStringNodes(OSQLParseNode*& pLiteral);
 229 #endif
 230     };
 231 }
 232
 233 #endif // INCLUDED_CONNECTIVITY_SQLPARSE_HXX
 234
 235 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */