Example 2: Specifying Search Rules

• Boolean expressions built using operators SE_AND, SE_OR and SE_NOT, and the following set of matching criteria:

  • Object type match. (Abstract or concrete classes are valid.)
  • Exact field value match and field value range match.
  • Hierarchy depth. Matches objects within a given number of levels from the base object.
  • Component object type match.
  • Component exact field value or field value range match.
  • Predicates: application functions “called back” by the user to evaluate the object.

• Implemented as arrays which can be initialized with convenient C Macros.

SE_Search_Rule polygon_rules[] =

{

SE_AND

(

SE_DRM_CLASS_MATCH( POLYGON ),

SE_MAX_SEARCH_DEPTH( 5 )

)

SE_END

};

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