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package com.keuin.kbackupfabric.backup.incremental;
import com.keuin.kbackupfabric.backup.incremental.serializer.IncBackupInfoSerializer;
import com.keuin.kbackupfabric.backup.incremental.serializer.SavedIncrementalBackup;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
/**
* Serialize and deserialize ObjectCollection from/to the disk file.
* Now we want to save additional metadata in incremental backups. So the serializer on pure ObjectCollection is depreciated.
*/
public class ObjectCollectionSerializer {
/**
* This doesn't work with the latest format. Use IncBackupInfoSerializer instead.
*/
@Deprecated
public static ObjectCollection2 fromFile(File file) throws IOException {
throw new RuntimeException("This method has been depreciated.");
// Objects.requireNonNull(file);
// ObjectCollection2 collection;
// try (FileInputStream fileInputStream = new FileInputStream(file)) {
// try (ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream)) {
// collection = (ObjectCollection2) objectInputStream.readObject();
// } catch (ClassNotFoundException ignored) {
// // this should not happen
// return null;
// }
// }
// return collection;
}
/**
* Only used for testing backward-compatibility with legacy backups.
*/
public static void toFile(ObjectCollection2 collection, File file) throws IOException {
Objects.requireNonNull(collection);
Objects.requireNonNull(file);
try (FileOutputStream fileOutputStream = new FileOutputStream(file)) {
try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream)) {
objectOutputStream.writeObject(collection);
}
}
}
public static Iterable<ObjectCollection2> fromDirectory(File directory) throws IOException {
if (!directory.isDirectory()) {
throw new IllegalArgumentException("Given directory is invalid.");
}
List<Path> pathList = new ArrayList<>();
Files.walk(directory.toPath(), 1).filter(p -> {
File f = p.toFile();
return f.isFile() && f.getName().endsWith(".kbi");
}).forEach(pathList::add);
List<ObjectCollection2> objectList = new ArrayList<>();
for (Path path : pathList) {
SavedIncrementalBackup info = IncBackupInfoSerializer.fromFile(path.toFile());
objectList.add(info.getObjectCollection());
}
return Collections.unmodifiableCollection(objectList);
}
}
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