org.smallmind.file.ephemeral.EphemeralDirectoryStream Maven / Gradle / Ivy
/*
* Copyright (c) 2007 through 2024 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* .
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.file.ephemeral;
import java.io.IOException;
import java.nio.channels.SeekableByteChannel;
import java.nio.file.ClosedDirectoryStreamException;
import java.nio.file.DirectoryStream;
import java.nio.file.LinkOption;
import java.nio.file.NoSuchFileException;
import java.nio.file.NotDirectoryException;
import java.nio.file.OpenOption;
import java.nio.file.Path;
import java.nio.file.SecureDirectoryStream;
import java.nio.file.attribute.FileAttribute;
import java.nio.file.attribute.FileAttributeView;
import java.util.Iterator;
import java.util.Set;
import org.smallmind.file.ephemeral.heap.DirectoryNode;
public class EphemeralDirectoryStream implements SecureDirectoryStream {
private final EphemeralFileSystemProvider provider;
private final EphemeralPath streamPath;
private final DirectoryNode directoryNode;
private final DirectoryStream.Filter filter;
private boolean closed = false;
public EphemeralDirectoryStream (EphemeralFileSystemProvider provider, EphemeralPath streamPath, DirectoryNode directoryNode, DirectoryStream.Filter filter) {
this.provider = provider;
this.streamPath = streamPath;
this.directoryNode = directoryNode;
this.filter = filter;
}
@Override
public synchronized void close () {
closed = true;
}
@Override
public synchronized Iterator iterator () {
if (closed) {
throw new ClosedDirectoryStreamException();
} else {
return directoryNode.iterator(streamPath, filter);
}
}
@Override
public synchronized SecureDirectoryStream newDirectoryStream (Path path, LinkOption... options)
throws NoSuchFileException, NotDirectoryException {
if (closed) {
throw new ClosedDirectoryStreamException();
} else {
return provider.newDirectoryStream(path.isAbsolute() ? path : streamPath.resolve(path), null, options);
}
}
@Override
public synchronized SeekableByteChannel newByteChannel (Path path, Set options, FileAttribute... attrs)
throws IOException {
if (closed) {
throw new ClosedDirectoryStreamException();
} else {
return provider.newByteChannel(path.isAbsolute() ? path : streamPath.resolve(path), options, attrs);
}
}
@Override
public synchronized void deleteFile (Path path)
throws IOException {
if (closed) {
throw new ClosedDirectoryStreamException();
} else {
provider.delete(path.isAbsolute() ? path : streamPath.resolve(path));
}
}
@Override
public synchronized void deleteDirectory (Path path)
throws IOException {
if (closed) {
throw new ClosedDirectoryStreamException();
} else {
provider.delete(path.isAbsolute() ? path : streamPath.resolve(path));
}
}
@Override
public synchronized void move (Path src, SecureDirectoryStream target, Path targetpath)
throws IOException {
if (closed) {
throw new ClosedDirectoryStreamException();
} else {
provider.move(src.isAbsolute() ? src : streamPath.resolve(src), targetpath.isAbsolute() ? targetpath : target.iterator().next().resolve(targetpath));
}
}
@Override
public synchronized V getFileAttributeView (Class type) {
if (closed) {
throw new ClosedDirectoryStreamException();
} else {
}
return null;
}
@Override
public synchronized V getFileAttributeView (Path path, Class type, LinkOption... options) {
if (closed) {
throw new ClosedDirectoryStreamException();
} else {
}
return null;
}
}