Module org.evrete.core

Package org.evrete.api.builders

Interface ConditionManager

public interface ConditionManager

Previously part of the RuleBuilder interface, since version 4.0.0, this interface contains methods for declaring various rule-level conditions and obtaining their references. These references can later be used in the EvaluatorsContext methods to replace existing conditions on the fly or to subscribe to evaluation events.

If you don't need these condition handles, it is better to use the standard where(...) methods of LhsBuilder, which provide the same functionality, and offer a more fluent API compared to this interface.

Method Summary

Modifier and Type	Method	Description
default CompletableFuture<EvaluatorHandle>	addCondition(String expression)	Compiles and adds the provided literal predicate to the current RuleBuilder as a new condition.
CompletableFuture<EvaluatorHandle>	addCondition(String expression, double complexity)	Compiles and adds the provided literal predicate to the current RuleBuilder as a new condition.
EvaluatorHandle	addCondition(Predicate<Object[]> predicate, double complexity, String... references)	Adds the provided predicate to the current RuleBuilder as a new condition.
default EvaluatorHandle	addCondition(Predicate<Object[]> predicate, String... references)	Adds the provided predicate to the current RuleBuilder as a new condition.
EvaluatorHandle	addCondition(ValuesPredicate predicate, double complexity, String... references)	Adds the provided predicate to the current RuleBuilder as a new condition.
default EvaluatorHandle	addCondition(ValuesPredicate predicate, String... references)	Adds the provided predicate to the current RuleBuilder as a new condition.

Method Details

addCondition

EvaluatorHandle addCondition(ValuesPredicate predicate,
 double complexity,
 String... references)

Adds the provided predicate to the current RuleBuilder as a new condition. The resulting EvaluatorHandle can later be provided to the EvaluatorsContext.replacePredicate(EvaluatorHandle, ValuesPredicate) method to replace conditions on the fly or subscribe to evaluation events.

The provided references must be of the same order and type as expected by the predicate argument.

Parameters:

predicate - the condition predicate

complexity - the condition's relative complexity

references - the field references, e.g., ["$a.id", "$b.code.value", "$c"]

Returns:

the evaluator handle

See Also:

• WorkUnit

addCondition

default EvaluatorHandle addCondition(ValuesPredicate predicate,
 String... references)

Adds the provided predicate to the current RuleBuilder as a new condition. The resulting EvaluatorHandle can later be provided to the EvaluatorsContext.replacePredicate(EvaluatorHandle, ValuesPredicate) method to replace conditions on the fly or subscribe to evaluation events.

The provided references must be of the same order and type as expected by the predicate argument.

Parameters:

predicate - the condition predicate

references - the field references, e.g., ["$a.id", "$b.code.value", "$c"]

Returns:

the evaluator handle

See Also:

• addCondition(ValuesPredicate, double, String...)

addCondition

EvaluatorHandle addCondition(Predicate<Object[]> predicate,
 double complexity,
 String... references)

Adds the provided predicate to the current RuleBuilder as a new condition. The resulting EvaluatorHandle can later be provided to the EvaluatorsContext.replacePredicate(EvaluatorHandle, ValuesPredicate) method to replace conditions on the fly or subscribe to evaluation events.

The provided references must be of the same order and type as expected by the predicate argument.

Parameters:

predicate - the condition predicate

complexity - the condition's relative complexity

references - the field references, e.g., ["$a.id", "$b.code.value", "$c"]

Returns:

the evaluator handle

See Also:

• WorkUnit

addCondition

default EvaluatorHandle addCondition(Predicate<Object[]> predicate,
 String... references)

Adds the provided predicate to the current RuleBuilder as a new condition. The resulting EvaluatorHandle can later be provided to the EvaluatorsContext.replacePredicate(EvaluatorHandle, ValuesPredicate) method to replace conditions on the fly or subscribe to evaluation events.

The provided references must be of the same order and type as expected by the predicate argument.

Parameters:

predicate - the condition predicate

references - the field references, e.g., ["$a.id", "$b.code.value", "$c"]

Returns:

the evaluator handle

See Also:

• addCondition(Predicate, double, String...)

addCondition

CompletableFuture<EvaluatorHandle> addCondition(String expression,
 double complexity)

Compiles and adds the provided literal predicate to the current RuleBuilder as a new condition. Unlike other addCondition methods, this method returns a CompletableFuture which will be available after the RuleSetBuilder.build() method is called. The resulting EvaluatorHandle can later be provided to the EvaluatorsContext.replacePredicate(EvaluatorHandle, ValuesPredicate) method to replace conditions on the fly or subscribe to evaluation events.

Parameters:

expression - the literal condition, e.g., $a.value > $c.code.value

complexity - the condition's relative complexity

Returns:

a CompletableFuture representing the EvaluatorHandle that will be available when the current ruleset is built.

See Also:

• WorkUnit

addCondition

default CompletableFuture<EvaluatorHandle> addCondition(String expression)

Compiles and adds the provided literal predicate to the current RuleBuilder as a new condition. Unlike other addCondition methods, this method returns a CompletableFuture which will be available after the RuleSetBuilder.build() method is called. The resulting EvaluatorHandle can later be provided to the EvaluatorsContext.replacePredicate(EvaluatorHandle, ValuesPredicate) method to replace conditions on the fly or subscribe to evaluation events.

Parameters:

expression - the literal condition, e.g., $a.value > $c.code.value

Returns:

a CompletableFuture representing the EvaluatorHandle that will be available when the current ruleset is built.

See Also:

• WorkUnit