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| 1 | +package ru.javawebinar.basejava.storage; |
| 2 | + |
| 3 | +import ru.javawebinar.basejava.exception.StorageException; |
| 4 | +import ru.javawebinar.basejava.model.Resume; |
| 5 | + |
| 6 | +import java.io.*; |
| 7 | +import java.nio.file.Files; |
| 8 | +import java.nio.file.Path; |
| 9 | +import java.nio.file.Paths; |
| 10 | +import java.util.ArrayList; |
| 11 | +import java.util.List; |
| 12 | +import java.util.Objects; |
| 13 | + |
| 14 | +public abstract class AbstractPathStorage extends AbstractStorage<Path> { |
| 15 | + private Path directory; |
| 16 | + |
| 17 | + protected abstract void doWrite(Resume r, OutputStream os) throws IOException; |
| 18 | + |
| 19 | + protected abstract Resume doRead(InputStream is) throws IOException; |
| 20 | + |
| 21 | + protected AbstractPathStorage(String dir) { |
| 22 | + directory = Paths.get(dir); |
| 23 | + Objects.requireNonNull(directory, "directory must not be null"); |
| 24 | + if (!Files.isDirectory(directory) || !Files.isWritable(directory)) { |
| 25 | + throw new IllegalArgumentException(dir + " is not directory or is not writable"); |
| 26 | + } |
| 27 | + } |
| 28 | + |
| 29 | + @Override |
| 30 | + public void clear() { |
| 31 | + try { |
| 32 | + Files.list(directory).forEach(this::doDelete); |
| 33 | + } catch (IOException e) { |
| 34 | + throw new StorageException("Path delete error", null); |
| 35 | + } |
| 36 | + } |
| 37 | + |
| 38 | + @Override |
| 39 | + public int size() { |
| 40 | + String[] list = directory.list(); |
| 41 | + if (list == null) { |
| 42 | + throw new StorageException("Directory read error", null); |
| 43 | + } |
| 44 | + return list.length; |
| 45 | + } |
| 46 | + |
| 47 | + @Override |
| 48 | + protected Path getSearchKey(String uuid) { |
| 49 | + return new Path(directory, uuid); |
| 50 | + } |
| 51 | + |
| 52 | + @Override |
| 53 | + protected void doUpdate(Resume r, Path Path) { |
| 54 | + try { |
| 55 | + doWrite(r, new BufferedOutputStream(new PathOutputStream(Path))); |
| 56 | + } catch (IOException e) { |
| 57 | + throw new StorageException("Path write error", r.getUuid(), e); |
| 58 | + } |
| 59 | + } |
| 60 | + |
| 61 | + @Override |
| 62 | + protected boolean isExist(Path Path) { |
| 63 | + return Path.exists(); |
| 64 | + } |
| 65 | + |
| 66 | + @Override |
| 67 | + protected void doSave(Resume r, Path Path) { |
| 68 | + try { |
| 69 | + Path.createNewPath(); |
| 70 | + } catch (IOException e) { |
| 71 | + throw new StorageException("Couldn't create Path " + Path.getAbsolutePath(), Path.getName(), e); |
| 72 | + } |
| 73 | + doUpdate(r, Path); |
| 74 | + } |
| 75 | + |
| 76 | + @Override |
| 77 | + protected Resume doGet(Path Path) { |
| 78 | + try { |
| 79 | + return doRead(new BufferedInputStream(new PathInputStream(Path))); |
| 80 | + } catch (IOException e) { |
| 81 | + throw new StorageException("Path read error", Path.getName(), e); |
| 82 | + } |
| 83 | + } |
| 84 | + |
| 85 | + @Override |
| 86 | + protected void doDelete(Path Path) { |
| 87 | + if (!Path.delete()) { |
| 88 | + throw new StorageException("Path delete error", Path.getName()); |
| 89 | + } |
| 90 | + } |
| 91 | + |
| 92 | + @Override |
| 93 | + protected List<Resume> doCopyAll() { |
| 94 | + Path[] Paths = directory.listPaths(); |
| 95 | + if (Paths == null) { |
| 96 | + throw new StorageException("Directory read error", null); |
| 97 | + } |
| 98 | + List<Resume> list = new ArrayList<>(Paths.length); |
| 99 | + for (Path Path : Paths) { |
| 100 | + list.add(doGet(Path)); |
| 101 | + } |
| 102 | + return list; |
| 103 | + } |
| 104 | +} |
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