org.requirementsascode.builder.FlowPositionPart 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.builder;

import static org.requirementsascode.builder.FlowConditionPart.flowConditionPart;

import java.util.Objects;

import org.requirementsascode.Condition;
import org.requirementsascode.exception.ElementAlreadyInModel;
import org.requirementsascode.flowposition.FlowPosition;

public class FlowPositionPart {
	private FlowPosition optionalFlowPosition;
	private FlowPart flowPart;
	private FlowConditionPart conditionPart;

	private FlowPositionPart(FlowPosition optionalFlowPosition, FlowPart flowPart) {
		this.optionalFlowPosition = optionalFlowPosition;
		this.flowPart = Objects.requireNonNull(flowPart);
	}
	
	static FlowPositionPart flowPositionPart(FlowPosition optionalFlowPosition, FlowPart flowPart) {
		return new FlowPositionPart(optionalFlowPosition, flowPart);
	}

	/**
   * Constrains the flow's condition: only if the specified condition is true as
   * well (beside the flow position), the flow is started.
   *
   * @param condition the condition that constrains when the flow is started
   * @return this condition part, to ease creation of the first step of the flow
   */
  public FlowConditionPart condition(Condition condition) {
    FlowPart flowPart = getFlowPart();
    FlowPosition optionalFlowPosition = getOptionalFlowPosition();
    this.conditionPart = flowConditionPart(condition, flowPart, optionalFlowPosition);
    return conditionPart;
  }

	/**
	 * Creates the first step of this flow. It can be run when the runner is at the
	 * right position.
	 *
	 * @param stepName the name of the step to be created
	 * @return the newly created step part, to ease creation of further steps
	 * @throws ElementAlreadyInModel if a step with the specified name already
	 *                               exists in the use case
	 */
	public StepPart step(String stepName) {
		return condition(null).step(stepName);
	}

	FlowPart getFlowPart() {
		return flowPart;
	}

	FlowPosition getOptionalFlowPosition() {
		return optionalFlowPosition;
	}
}