Class RmrVisitor

common/src/main/java/pro/tools/path/visit/RmrVisitor.java:18–59

@author SeanDragon Create By 2017-09-01 14:47

 * Create By 2017-09-01 14:47
 */
public class RmrVisitor implements FileVisitor<Path> {

    private static final Logger log = LoggerFactory.getLogger(RmrVisitor.class);

    public static final RmrVisitor INSTANCE = new RmrVisitor();

    @Override
    public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
        return FileVisitResult.CONTINUE;
    }

    @Override
    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
        boolean result = rm(file);
        if (log.isDebugEnabled()) {
            log.debug("删除文件:\t" + file + ",执行结果:\t" + result);
        }
        return FileVisitResult.CONTINUE;
    }

    @Override
    public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException {
        return FileVisitResult.CONTINUE;
    }

    @Override
    public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
        if (exc == null) {
            boolean success = rm(dir);
            if (log.isDebugEnabled()) {
                log.debug("删除文件夹:\t" + dir + ",执行结果:\t" + success);
            }
        } else {
            throw exc;
        }
        return FileVisitResult.CONTINUE;
    }

    private static boolean rm(Path path) throws IOException {
        return Files.deleteIfExists(path);
    }
}