org.requirementsascode.Step Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of requirementsascodecore Show documentation

Enables you to define and run executable use case specifications, in your code.

There is a newer version: 2.0

Show newest version

package org.requirementsascode;

import java.util.Optional;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.Supplier;

/**
 * A step is a part of a use case. The steps define the behavior of the use
 * case.
 *
 * 
 * A step is the core class of requirementsascode, providing all the necessary
 * configuration information to the {@link ModelRunner} to cause the system to
 * react to messages.
 *
 * @author b_muth
 */
public abstract class Step extends ModelElement{
	private UseCase useCase;
	private AbstractActor[] actors;
	private Condition condition;
	private Class messageClass;
	private SystemReaction systemReaction;
	private AbstractActor publishTo;
  private Condition aCase;

	/**
	 * Creates a step with the specified name that belongs to the specified use
	 * case.
	 *
	 * @param useCase   the use case this step belongs to
	 * @param stepName  the name of the step to be created
	 * @param condition
	 */
	Step(String stepName, UseCase useCase, Condition condition) {
		super(stepName, useCase.getModel());
		this.useCase = useCase;
		this.condition = condition;
	}

	public abstract Predicate getPredicate();

	public UseCase getUseCase() {
		return useCase;
	}

	public Optional getCondition() {
		return Optional.ofNullable(condition);
	}
	
  protected Predicate isConditionTrue() {
    Condition conditionOrElseTrue = getCondition().orElse(() -> true);
    Predicate flowCondition = toPredicate(conditionOrElseTrue);
    return flowCondition;
  }

	public AbstractActor[] getActors() {
		return actors;
	}

	public void setActors(AbstractActor[] actors) {
    this.actors = actors;
	}

	public Class getMessageClass() {
		return messageClass;
	}

	public void setMessageClass(Class eventClass) {
		this.messageClass = eventClass;
	}

	public SystemReaction getSystemReaction() {
		return systemReaction;
	}
	
	public void setSystemReaction(Runnable systemReaction) {
		this.systemReaction = new SystemReaction<>(systemReaction);
	}
	
	public  void setSystemReaction(Consumer systemReaction) {
		this.systemReaction = new SystemReaction<>(systemReaction);
	}
	
	public  void setSystemReaction(Function systemReaction) {
		this.systemReaction = new SystemReaction<>(systemReaction);
	}

	public  void setSystemReaction(Supplier systemReaction) {
		this.systemReaction = new SystemReaction<>(systemReaction);
	}

	protected static Predicate toPredicate(Condition condition) {
		return modelRunner -> condition.evaluate();
	}

	public Optional getPublishTo() {
		return Optional.ofNullable(publishTo);
	}

	public void setPublishTo(AbstractActor recipient) {
		this.publishTo = recipient;
	}

  public void setCase(Condition aCase) {
    this.aCase = aCase;
  }
  
  public Optional getCase(){
    return Optional.ofNullable(aCase);
  }
}