de.codecamp.messages.shared.bundle.NioFileSystemAdapter Maven / Gradle / Ivy

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Messanthropist's shared development and build time utilities.

There is a newer version: 2.2.0

package de.codecamp.messages.shared.bundle;

import static java.util.stream.Collectors.toList;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.NoSuchFileException;
import java.nio.file.NotDirectoryException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.util.Collections;
import java.util.List;
import java.util.stream.Stream;


public class NioFileSystemAdapter
  implements
    FileSystemAdapter
{

  @Override
  public Path getDirectory(String directoryPath)
  {
    return Paths.get(directoryPath);
  }

  @Override
  public List listFiles(Path dir, boolean recursive)
    throws IOException
  {
    try (Stream pathStream = (recursive ? Files.walk(dir) : Files.list(dir)))
    {
      return pathStream.filter(Files::isRegularFile).collect(toList());
    }
    catch (NoSuchFileException | NotDirectoryException ex)
    {
      return Collections.emptyList();
    }
  }

  @Override
  public Path getFile(Path dir, String fileName)
  {
    return dir.resolve(fileName);
  }


  @Override
  public String getFileName(Path file)
  {
    return file.getFileName().toString();
  }

  @Override
  public String getRelativeFilePath(Path dir, Path file)
  {
    return dir.relativize(file).toString();
  }

  @Override
  public String getDisplayPath(Path dir, Path file)
  {
    return dir.relativize(file).toString();
  }

  @Override
  public boolean exists(Path file)
  {
    return Files.exists(file);
  }

  @Override
  public void createParentDirectories(Path file)
    throws IOException
  {
    Path bundleDir = file.getParent();
    Files.createDirectories(bundleDir);
  }

  @Override
  public void deleteIfExists(Path file)
    throws IOException
  {
    Files.deleteIfExists(file);
  }

  @Override
  public InputStream newInputStream(Path file)
    throws IOException
  {
    return Files.newInputStream(file);
  }

  @Override
  public OutputStream newOutputStream(Path file)
    throws IOException
  {
    return Files.newOutputStream(file, StandardOpenOption.CREATE,
        StandardOpenOption.TRUNCATE_EXISTING);
  }

}