org.drools.core.reteoo.builder

Interface ReteooComponentBuilder

All Known Implementing Classes:

AccumulateBuilder, CollectBuilder, ConditionalBranchBuilder, EntryPointBuilder, EvalBuilder, ForallBuilder, FromBuilder, GroupElementBuilder, GroupElementBuilder.AndBuilder, GroupElementBuilder.ExistsBuilder, GroupElementBuilder.NotBuilder, GroupElementBuilder.OrBuilder, NamedConsequenceBuilder, PatternBuilder, QueryElementBuilder, ReactiveFromBuilder, TimerBuilder, WindowReferenceBuilder

public interface ReteooComponentBuilder

An interface for Reteoo Component builders

Method Summary

Methods

Modifier and Type	Method and Description
void	build(BuildContext context, BuildUtils utils, RuleConditionElement rce) Builds and attach if needed the given RuleConditionalElement
boolean	requiresLeftActivation(BuildUtils utils, RuleConditionElement rce) A boolean function that indicates if the builder requires a previous left (tuple) activation in order to corretly build the given component.

Method Detail

build

void build(BuildContext context,
         BuildUtils utils,
         RuleConditionElement rce)

Builds and attach if needed the given RuleConditionalElement

Parameters:

context - current build context

rce -

requiresLeftActivation

boolean requiresLeftActivation(BuildUtils utils,
                             RuleConditionElement rce)

A boolean function that indicates if the builder requires a previous left (tuple) activation in order to corretly build the given component. In other words, if it returns true and no previous TupleSource is already created, an InitialFact pattern must be added with appropriate left input adapter for the network to be correctly built. For instance, NOT / EXISTS / ACCUMULATE are examples of builders that must return true for this method, while PATTERN must return false.

Parameters:

rce - the element to be built

Returns:

true if a tuple source is required, false otherwise.