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 4             // agreements.  Refer to the OpenPegasusNOTICE.txt file distributed with
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28 martin 1.10 //////////////////////////////////////////////////////////////////////////

29 mike   1.2  //
30             //%/////////////////////////////////////////////////////////////////////////////
31             
32             #ifndef Pegasus_WQLPropertySource_h
33             #define Pegasus_WQLPropertySource_h
34             
35             #include <Pegasus/Common/Config.h>

36 kumpf  1.4  #include <Pegasus/Common/CIMName.h>

37 mike   1.2  #include <Pegasus/WQL/Linkage.h>
38             #include <Pegasus/WQL/WQLOperand.h>
39             
40             PEGASUS_NAMESPACE_BEGIN
41             
42             /** This class must be implemented to provide a source of properties for the
43                 WQLSelectStatement::evaluateWhereClause() method which calls methods of
44                 this class to obtain real values for property names used in the where
45                 clause.
46             */
47             class PEGASUS_WQL_LINKAGE WQLPropertySource
48             {
49             public:
50             
51                 /** Virtual destructor.
52                 */
53                 virtual ~WQLPropertySource();
54             
55                 /** Returns the value whose property has the given name. The output

56 karl   1.9      parameter value is populated with the value of that parameter.
57                 Note that only integer, double, and string types are supported
58                 (see the WQLOperand class). The implementer of this method must
59                 perform appropriate conversions to the appropriate type.
60             
61                 @param propertyName name of property to be gotten.
62                 @param value holds the value of the property upon return.
63                 @return true if such a property was found and false otherwise.

64 mike   1.2      */
65                 virtual Boolean getValue(

66 kumpf  1.12     const CIMName& propertyName,

67 karl   1.9      WQLOperand& value) const = 0;

68 mike   1.2  };
69             
70             PEGASUS_NAMESPACE_END
71             
72             #endif /* Pegasus_WQLPropertySource_h */