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JMockit Coverage is a code coverage tool with several metrics (line, path, data) capable of generating HTML reports. It is designed with ease of use in mind, avoiding the need for complex configuration. Instead, smart (but overridable) defaults are employed, such as the selection of which classes to consider for coverage, and where to find sources files for report generation.

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/*
 * Copyright (c) 2006-2013 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.coverage.paths;

import java.util.*;

import org.jetbrains.annotations.*;

import mockit.coverage.paths.Node.*;

final class PathBuilder
{
   @NotNull List buildPaths(@NotNull 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);
   }

   @NotNull private List getAllPathsFromExitNodes(@NotNull List nodes)
   {
      List paths = new ArrayList();

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

      return paths;
   }
}