jadex.rules.rulesystem.rete.constraints

Interface IConstraintEvaluator

All Known Implementing Classes:

AndConstraintEvaluator, ConstraintEvaluator, NotConstraintEvaluator, OrConstraintEvaluator

public interface IConstraintEvaluator

Interface for all constraint evaluators. They are used to abstract away the tests nodes have to perform.

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(java.lang.Object right, Tuple left, IOAVState state) Evaluate the constraints given the right object, left tuple (null for alpha nodes) and the state.
AttributeSet	getIndirectAttributes() Get the set of indirect attribute types.
AttributeSet	getRelevantAttributes() Get the set of relevant attribute types.
boolean	isAffected(int tupleindex, OAVAttributeType attr) Test if a constraint evaluator is affected from a change of a certain attribute.

Method Detail

evaluate

boolean evaluate(java.lang.Object right,
                 Tuple left,
                 IOAVState state)

Evaluate the constraints given the right object, left tuple (null for alpha nodes) and the state.

Parameters:

right - The right input object.

left - The left input tuple.

state - The working memory.

isAffected

boolean isAffected(int tupleindex,
                   OAVAttributeType attr)

Test if a constraint evaluator is affected from a change of a certain attribute.

Parameters:

tupleindex - The tuple index.

attr - The attribute.

Returns:

True, if affected.

getRelevantAttributes

AttributeSet getRelevantAttributes()

Get the set of relevant attribute types.

getIndirectAttributes

AttributeSet getIndirectAttributes()

Get the set of indirect attribute types. I.e. attributes of objects, which are not part of an object conditions (e.g. for chained extractors)

Returns:

The relevant attribute types.