org.drools.reteoo.builder
Class QueryElementBuilder

java.lang.Object
  org.drools.reteoo.builder.QueryElementBuilder

All Implemented Interfaces:

ReteooComponentBuilder

public class QueryElementBuilder
extends Object
implements ReteooComponentBuilder

Constructor Summary

QueryElementBuilder()

Method Summary

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.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QueryElementBuilder

public QueryElementBuilder()

Method Detail

build

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

Description copied from interface: ReteooComponentBuilder

Builds and attach if needed the given RuleConditionalElement

Specified by:

build in interface ReteooComponentBuilder

Parameters:

context - current build context

requiresLeftActivation

public boolean requiresLeftActivation(BuildUtils utils,
                                      RuleConditionElement rce)

Description copied from interface: ReteooComponentBuilder

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.

Specified by:

requiresLeftActivation in interface ReteooComponentBuilder

rce - the element to be built

Returns:

true if a tuple source is required, false otherwise.