org.drools.spi
Interface Condition

All Superinterfaces:

RuleComponent, java.io.Serializable

All Known Implementing Classes:

GroovyCondition, JavaCondition, PojoCondition, PythonCondition

public interface Condition
extends RuleComponent

A Condition that filters facts.

See Also:

Tuple

Method Summary

Declaration[]	getRequiredTupleMembers() Retrieve the array of Declaration s required by this condition to perform its duties.
boolean	isAllowed(Tuple tuple) Determine if the supplied Tuple is allowed by this condition.

Method Detail

getRequiredTupleMembers

Declaration[] getRequiredTupleMembers()

Retrieve the array of Declaration s required by this condition to perform its duties.

Returns:

The array of Declarations expected on incoming Tuples.

isAllowed

boolean isAllowed(Tuple tuple)
                  throws ConditionException

Determine if the supplied Tuple is allowed by this condition.

Parameters:

tuple - The Tuple to test.

Returns:

true if the Tuple passes this condition, else false.

Throws:

ConditionException - if an error occurs during filtering.