java.lang.Object
org.apache.jena.reasoner.rulesys.builtins.BaseBuiltin
org.apache.jena.reasoner.rulesys.builtins.NoValue
- All Implemented Interfaces:
Builtin
Can be used in two arg form (X, P) or three arg form (X, P, V).
In three arg form it succeeds if the triple (X, P, V) is not
currently present, in two arg form it succeeds if there is not value
for (X, P, *).
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Field Summary
Fields inherited from class org.apache.jena.reasoner.rulesys.builtins.BaseBuiltin
BASE_URI
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionboolean
bodyCall
(Node[] args, int length, RuleContext context) This method is invoked when the builtin is called in a rule body.getName()
Return a name for this builtin, normally this will be the name of the functor that will be used to invoke it.boolean
Flag as non-monotonic so the guard clause will get rerun after deferal as part of a non-trivial conflict set.Methods inherited from class org.apache.jena.reasoner.rulesys.builtins.BaseBuiltin
checkArgs, getArg, getArgLength, getURI, headAction, isSafe
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Constructor Details
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NoValue
public NoValue()
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Method Details
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getName
Return a name for this builtin, normally this will be the name of the functor that will be used to invoke it. -
bodyCall
This method is invoked when the builtin is called in a rule body.- Specified by:
bodyCall
in interfaceBuiltin
- Overrides:
bodyCall
in classBaseBuiltin
- Parameters:
args
- the array of argument values for the builtin, this is an array of Nodes, some of which may be Node_RuleVariables.length
- the length of the argument list, may be less than the length of the args array for some rule enginescontext
- an execution context giving access to other relevant data- Returns:
- return true if the buildin predicate is deemed to have succeeded in the current environment
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isMonotonic
public boolean isMonotonic()Flag as non-monotonic so the guard clause will get rerun after deferal as part of a non-trivial conflict set.- Specified by:
isMonotonic
in interfaceBuiltin
- Overrides:
isMonotonic
in classBaseBuiltin
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