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File: [Pegasus] / pegasus / src / Pegasus / CQL / CQLExpression.h
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Revision: 1.1.2.7, Tue Sep 7 19:38:52 2004 UTC (19 years, 9 months ago) by humberto Branch: CQL_2_5_BRANCH Changes since 1.1.2.6: +10 -33 lines PEP#: 138 TITLE: CQL updates DESCRIPTION: CQL updates |
#ifndef Pegasus_CQLExpression_h #define Pegasus_CQLExpression_h #include <Pegasus/Common/Config.h> #include <Pegasus/CQL/CQLValue.h> #include <Pegasus/CQL/Linkage.h> #include <Pegasus/CQL/CQLTerm.h> PEGASUS_NAMESPACE_BEGIN class PEGASUS_CQL_LINKAGE CQLFactory; class PEGASUS_CQL_LINKAGE CQLExpressionRep; class PEGASUS_CQL_LINKAGE QueryContext; /** The enum is private, but the definition is public. */ enum TermOpType {plus,minus}; #ifndef PEGASUS_ARRAY_T #define PEGASUS_ARRAY_T TermOpType #include <Pegasus/Common/ArrayInter.h> #undef PEGASUS_ARRAY_T #endif /** The CQLExpression class encapsulates a generic CQL expression to make it easier to break into components and process the expression. A CQL expression is made up of terms and operators. For example, 'A + B' is a CQLExpression, where 'A' and 'B' are terms, and '+' is an operator. There must be exactly one more term than there are operators. */ class PEGASUS_CQL_LINKAGE CQLExpression { public: CQLExpression():_rep(0){} /** constructor takes one CQLTerm object. */ CQLExpression(CQLTerm& theTerm); CQLExpression(const CQLExpression& inExpress); /** the getValue method evaluates the expression and returns the value. Any property that need to be resolved into a value is taken from the CIMInstance. */ ~CQLExpression(); CQLValue resolveValue(CIMInstance CI, QueryContext& QueryCtx); /** The appendOperation is used by Bison. It is invoked 0 or more times for the CQLExpression, and when invoked will always pass in an integer that is the Term operation type and a CQLTerm object. */ void appendOperation(TermOpType theTermOpType, CQLTerm& theTerm); String toString(); Boolean isSimpleValue(); Array<CQLTerm> getTerms(); Array<TermOpType> getOperators(); void applyScopes(Array<CQLScope> inScopes); Boolean operator==(const CQLExpression& expr); Boolean operator!=(const CQLExpression& expr); friend class CQLFactory; private: CQLExpressionRep *_rep; }; #ifndef PEGASUS_ARRAY_T #define PEGASUS_ARRAY_T CQLExpression #include <Pegasus/Common/ArrayInter.h> #undef PEGASUS_ARRAY_T #endif PEGASUS_NAMESPACE_END #endif
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