mockit.coverage.reporting.parsing.FileParser Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jmockit-coverage Show documentation

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.

There is a newer version: 1.23

Show newest version

/*
 * Copyright (c) 2006-2015 Rogério Liesenfeld
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.coverage.reporting.parsing;

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

public final class FileParser
{
   private static final class PendingClass
   {
      @Nonnull final String className;
      int braceBalance;
      PendingClass(@Nonnull String className) { this.className = className; }
   }

   @Nonnull public final LineParser lineParser = new LineParser();
   @Nonnull public final List currentClasses = new ArrayList(2);

   @Nullable private PendingClass currentClass;
   private boolean openingBraceForClassFound;
   private int currentBraceBalance;

   public boolean parseCurrentLine(@Nonnull String line)
   {
      if (!lineParser.parse(line)) {
         return false;
      }

      LineElement firstElement = lineParser.getInitialElement();
      LineElement classDeclaration = findClassNameInNewClassDeclaration();

      if (classDeclaration != null) {
         firstElement = classDeclaration;
         registerStartOfClassDeclaration(classDeclaration);
      }

      if (currentClass != null) {
         detectPotentialEndOfClassDeclaration(firstElement);
      }

      return true;
   }

   @Nullable private LineElement findClassNameInNewClassDeclaration()
   {
      LineElement previous = null;

      for (LineElement element : lineParser.getInitialElement()) {
         if (element.isKeyword("class") && (previous == null || !previous.isDotSeparator())) {
            return element.getNextCodeElement();
         }

         previous = element;
      }

      return null;
   }

   private void registerStartOfClassDeclaration(@Nonnull LineElement elementWithClassName)
   {
      String className = elementWithClassName.getText();

      if (currentClass != null) {
         currentClass.braceBalance = currentBraceBalance;
      }

      currentClass = new PendingClass(className);
      currentClasses.add(currentClass);
      currentBraceBalance = 0;
   }

   private void detectPotentialEndOfClassDeclaration(@Nonnull LineElement firstElement)
   {
      // TODO: how to deal with classes defined entirely in one line?
      currentBraceBalance += firstElement.getBraceBalanceUntilEndOfLine();

      if (!openingBraceForClassFound && currentBraceBalance > 0) {
         openingBraceForClassFound = true;
      }
      else if (openingBraceForClassFound && currentBraceBalance == 0) {
         restorePreviousPendingClassIfAny();
      }
   }

   private void restorePreviousPendingClassIfAny()
   {
      currentClasses.remove(currentClass);

      if (currentClasses.isEmpty()) {
         currentClass = null;
      }
      else {
         currentClass = currentClasses.get(currentClasses.size() - 1);
         currentBraceBalance = currentClass.braceBalance;
      }
   }

   @Nullable public String getCurrentlyPendingClass()
   {
      return currentClass == null ? null : currentClass.className;
   }
}