package org.springframework.beans;
   
   import java.io.File;
   import java.io.FileFilter;
   import java.io.IOException;
   import java.util.ArrayList;
   import java.util.List;
   
   public class ProblemFileDetector {
      public List<File> getProblemFiles(ProblemFileContext context) throws IOException {
          File baseDir = context.getBaseDir();
          FileFilter exclude = context.getExclude();
          FileFilter include = context.getInclude();
          FileFilter problem = context.getProblem();
          List<File> files = getFiles(baseDir, exclude, include);
          System.out.println("Located " + files.size() + " total files");
          List<File> problemFiles = getProblemFiles(files, problem);
          return problemFiles;
      }
  
      protected List<File> getProblemFiles(List<File> files, FileFilter problem) throws IOException {
          List<File> problemFiles = new ArrayList<File>();
          for (File file : files) {
              if (problem.accept(file)) {
                  problemFiles.add(file);
              }
          }
          return problemFiles;
      }
  
      protected List<File> getFiles(File dir, FileFilter exclude, FileFilter include) {
          File[] contents = dir.listFiles();
          List<File> files = new ArrayList<File>();
          for (File file : contents) {
              if (!exclude.accept(file)) {
                  continue;
              }
              if (file.isDirectory()) {
                  files.addAll(getFiles(file, exclude, include));
              } else {
                  if (include.accept(file)) {
                      files.add(file);
                  }
              }
          }
          return files;
      }
  }