From 3a98225b068a2330799959a071b61b871dafa2ca Mon Sep 17 00:00:00 2001
From: Bertil Muth <bertilmuth@yahoo.de>
Date: Thu, 11 May 2017 15:19:06 +0200
Subject: [PATCH] Remove FlowPredicate from FlowPart

Preparatory refactor for #2
---
 .../java/org/requirementsascode/FlowPart.java | 48 ++-----------------
 .../requirementsascode/StepSystemPart.java    |  2 +-
 .../java/org/requirementsascode/UseCase.java  | 11 +----
 3 files changed, 6 insertions(+), 55 deletions(-)

diff --git a/requirementsascodecore/src/main/java/org/requirementsascode/FlowPart.java b/requirementsascodecore/src/main/java/org/requirementsascode/FlowPart.java
index ad8804c9..4047f838 100644
--- a/requirementsascodecore/src/main/java/org/requirementsascode/FlowPart.java
+++ b/requirementsascodecore/src/main/java/org/requirementsascode/FlowPart.java
@@ -19,13 +19,11 @@ public class FlowPart {
   private Flow flow;
   private UseCase useCase;
   private UseCasePart useCasePart;
-  private FlowPredicate flowPredicate;
 
   FlowPart(Flow flow, UseCasePart useCasePart) {
     this.flow = flow;
     this.useCasePart = useCasePart;
     this.useCase = useCasePart.useCase();
-    this.flowPredicate = new FlowPredicate();
   }
 
   /**
@@ -37,19 +35,10 @@ public class FlowPart {
    */
   public StepPart step(String stepName) {
     Step useCaseStep =
-        useCasePart.useCase().newStep(stepName, flow, Optional.empty(), getFlowPredicate());
+        useCasePart.useCase().newStep(stepName, flow, Optional.empty());
     return new StepPart(useCaseStep, this);
   }
 
-  /**
-   * Returns the predicate for this flow (that will become the predicate of its first step).
-   *
-   * @return the flow's predicate
-   */
-  Optional<Predicate<UseCaseModelRunner>> getFlowPredicate() {
-    return flowPredicate.get();
-  }
-
   /**
    * Starts the flow after the specified step has been run, in this flow's use case. You should use
    * after to handle exceptions that occured in the specified step.
@@ -60,7 +49,7 @@ Optional<Predicate<UseCaseModelRunner>> getFlowPredicate() {
    */
   public FlowPart after(String stepName) {
     Step step = useCase.findStep(stepName);
-    flowPredicate.setFlowPosition(new After(Optional.of(step)));
+    flow.setFlowPosition(new After(Optional.of(step)));
     return this;
   }
 
@@ -73,7 +62,7 @@ public FlowPart after(String stepName) {
    */
   public FlowPart insteadOf(String stepName) {
     Step step = useCase.findStep(stepName);
-    flowPredicate.setFlowPosition(new InsteadOf(step));
+    flow.setFlowPosition(new InsteadOf(step));
     return this;
   }
 
@@ -87,7 +76,7 @@ public FlowPart insteadOf(String stepName) {
   public FlowPart when(Predicate<UseCaseModelRunner> whenPredicate) {
     Objects.requireNonNull(whenPredicate);
 
-    flowPredicate.setWhen(whenPredicate);
+    flow.setWhen(whenPredicate);
     return this;
   }
 
@@ -102,33 +91,4 @@ UseCasePart getUseCasePart() {
   UseCaseModelBuilder getUseCaseModelBuilder() {
     return useCasePart.useCaseModelBuilder();
   }
-
-  private class FlowPredicate {
-    private Optional<Predicate<UseCaseModelRunner>> predicate;
-
-    private FlowPredicate() {
-      this.predicate = Optional.empty();
-    }
-
-    public void setFlowPosition(Predicate<UseCaseModelRunner> stepPredicate) {
-      flow.setFlowPosition(stepPredicate);
-      predicate = Optional.of(stepPredicate);
-    }
-
-    public void setWhen(Predicate<UseCaseModelRunner> whenPredicate) {
-      flow.setWhen(whenPredicate);
-      predicate = Optional.of(predicate.orElse(r -> true).and(whenPredicate));
-    }
-
-    public Optional<Predicate<UseCaseModelRunner>> get() {
-      return predicate.map(pred -> isRunnerInDifferentFlow().and(pred));
-    }
-
-    private Predicate<UseCaseModelRunner> isRunnerInDifferentFlow() {
-      Predicate<UseCaseModelRunner> isRunnerInDifferentFlow =
-          runner ->
-              runner.getLatestFlow().map(runnerFlow -> !flow.equals(runnerFlow)).orElse(true);
-      return isRunnerInDifferentFlow;
-    }
-  }
 }
diff --git a/requirementsascodecore/src/main/java/org/requirementsascode/StepSystemPart.java b/requirementsascodecore/src/main/java/org/requirementsascode/StepSystemPart.java
index 9eed2f7b..aedb96d6 100644
--- a/requirementsascodecore/src/main/java/org/requirementsascode/StepSystemPart.java
+++ b/requirementsascodecore/src/main/java/org/requirementsascode/StepSystemPart.java
@@ -43,7 +43,7 @@ public StepPart step(String stepName) {
     Step nextUseCaseStepInFlow =
         useCaseFlow
             .getUseCase()
-            .newStep(stepName, useCaseFlow, Optional.of(step), Optional.empty());
+            .newStep(stepName, useCaseFlow, Optional.of(step));
 
     return new StepPart(nextUseCaseStepInFlow, useCaseFlowPart);
   }
diff --git a/requirementsascodecore/src/main/java/org/requirementsascode/UseCase.java b/requirementsascodecore/src/main/java/org/requirementsascode/UseCase.java
index 4030e7c6..eb3f24f3 100644
--- a/requirementsascodecore/src/main/java/org/requirementsascode/UseCase.java
+++ b/requirementsascodecore/src/main/java/org/requirementsascode/UseCase.java
@@ -10,7 +10,6 @@
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Optional;
-import java.util.function.Predicate;
 
 import org.requirementsascode.exception.ElementAlreadyInModel;
 import org.requirementsascode.exception.NoSuchElementInModel;
@@ -99,17 +98,9 @@ Flow newFlow(String flowName) {
    * @param stepName the name of the step
    * @param flow the flow the step shall belong to
    * @param previousStep the previous step in the flow, if there is one
-   * @param optionalPredicate the complete predicate of the step. If empty, the default predicate
-   *     is: after previous step, unless interrupted by other flow with specified condition (e.g
-   *     flow with "insteadOf" condition).
    * @return the newly created step
    */
-  Step newStep(
-      String stepName,
-      Flow flow,
-      Optional<Step> previousStep,
-      Optional<Predicate<UseCaseModelRunner>> optionalPredicate) {
-
+  Step newStep(String stepName, Flow flow, Optional<Step> previousStep) {
     Step step = new Step(stepName, flow, previousStep);
     saveModelElement(step, nameToStepMap);