/*
    * Copyright (c) 2006 JMockit developers
    * This file is subject to the terms of the MIT license (see LICENSE.txt).
    */
   package mockit.coverage;
   
   import edu.umd.cs.findbugs.annotations.NonNull;
   
   import java.io.File;
  import java.io.IOException;
  import java.nio.file.Path;
  
  import mockit.coverage.data.CoverageData;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  final class AccretionFile {
  
      /** The logger. */
      private static final Logger logger = LoggerFactory.getLogger(AccretionFile.class);
  
      @NonNull
      private final File outputFile;
      @NonNull
      private final CoverageData newData;
  
      AccretionFile(@NonNull String outputDir, @NonNull CoverageData newData) {
          String parentDir = Configuration.getOrChooseOutputDirectory(outputDir);
          outputFile = Path.of(parentDir, "coverage.ser").toFile();
  
          newData.fillLastModifiedTimesForAllClassFiles();
          this.newData = newData;
      }
  
      void mergeDataFromExistingFileIfAny() throws IOException {
          if (outputFile.exists()) {
              CoverageData previousData = CoverageData.readDataFromFile(outputFile);
              newData.merge(previousData);
          }
      }
  
      void generate() throws IOException {
          newData.writeDataToFile(outputFile);
          logger.info("JMockit: Coverage data written to {}", outputFile.getCanonicalPath());
      }
  }