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JMockit is a Java toolkit for automated developer testing. It contains mocking/faking APIs and a code coverage tool, supporting both JUnit and TestNG. The mocking APIs allow all kinds of Java code, without testability restrictions, to be tested in isolation from selected dependencies.

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/*
 * Copyright (c) 2006 JMockit developers
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.coverage.paths;

import java.util.*;
import javax.annotation.*;

import mockit.coverage.paths.Node.*;

final class PathBuilder
{
   private PathBuilder() {}

   @Nonnull
   static List buildPaths(@Nonnull List nodes) {
      if (nodes.size() == 1) {
         return Collections.emptyList();
      }

      Entry entryNode = (Entry) nodes.get(0);
      Path path = new Path(entryNode);

      ConditionalSuccessor nextNode = entryNode.nextNode;

      if (nextNode == null) {
         nextNode = (ConditionalSuccessor) nodes.get(1);
      }

      nextNode.addToPath(path);

      return getAllPathsFromExitNodes(nodes);
   }

   @Nonnull
   private static List getAllPathsFromExitNodes(@Nonnull List nodes) {
      List paths = new ArrayList<>();

      for (Node node : nodes) {
         if (node instanceof Exit) {
            paths.addAll(((Exit) node).paths);
         }
      }

      return paths;
   }
}