| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.lucene.mockfile; |
| |
| import java.io.IOException; |
| import java.nio.file.FileStore; |
| import java.nio.file.FileSystem; |
| import java.nio.file.FileSystems; |
| import java.nio.file.Path; |
| import java.nio.file.PathMatcher; |
| import java.nio.file.WatchService; |
| import java.nio.file.attribute.UserPrincipalLookupService; |
| import java.nio.file.spi.FileSystemProvider; |
| import java.util.Iterator; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| /** |
| * A {@code FilterFileSystem} contains another |
| * {@code FileSystem}, which it uses as its basic |
| * source of data, possibly transforming the data along the |
| * way or providing additional functionality. |
| */ |
| public class FilterFileSystem extends FileSystem { |
| |
| /** |
| * FileSystemProvider that created this FilterFileSystem |
| */ |
| protected final FilterFileSystemProvider parent; |
| |
| /** |
| * The underlying {@code FileSystem} instance. |
| */ |
| protected final FileSystem delegate; |
| |
| /** |
| * Construct a {@code FilterFileSystem} based on |
| * the specified base filesystem. |
| * <p> |
| * Note that base filesystem is closed if this filesystem is closed, |
| * however the default filesystem provider will never be closed, it doesn't |
| * support that. |
| * @param delegate specified base channel. |
| */ |
| public FilterFileSystem(FilterFileSystemProvider parent, FileSystem delegate) { |
| this.parent = Objects.requireNonNull(parent); |
| this.delegate = Objects.requireNonNull(delegate); |
| } |
| |
| @Override |
| public FileSystemProvider provider() { |
| return parent; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| if (delegate == FileSystems.getDefault()) { |
| // you can't close the default provider! |
| parent.onClose(); |
| } else { |
| try (FileSystem d = delegate) { |
| assert d != null; // avoid stupid compiler warning |
| parent.onClose(); |
| } |
| } |
| } |
| |
| @Override |
| public boolean isOpen() { |
| return delegate.isOpen(); |
| } |
| |
| @Override |
| public boolean isReadOnly() { |
| return delegate.isReadOnly(); |
| } |
| |
| @Override |
| public String getSeparator() { |
| return delegate.getSeparator(); |
| } |
| |
| @Override |
| public Iterable<Path> getRootDirectories() { |
| final Iterable<Path> roots = delegate.getRootDirectories(); |
| return () -> { |
| final Iterator<Path> iterator = roots.iterator(); |
| return new Iterator<Path>() { |
| @Override |
| public boolean hasNext() { |
| return iterator.hasNext(); |
| } |
| |
| @Override |
| public Path next() { |
| return new FilterPath(iterator.next(), FilterFileSystem.this); |
| } |
| |
| @Override |
| public void remove() { |
| iterator.remove(); |
| } |
| }; |
| }; |
| } |
| |
| @Override |
| public Iterable<FileStore> getFileStores() { |
| final Iterable<FileStore> fileStores = delegate.getFileStores(); |
| return () -> { |
| final Iterator<FileStore> iterator = fileStores.iterator(); |
| return new Iterator<FileStore>() { |
| @Override |
| public boolean hasNext() { |
| return iterator.hasNext(); |
| } |
| |
| @Override |
| public FileStore next() { |
| return new FilterFileStore(iterator.next(), parent.getScheme()) {}; |
| } |
| |
| @Override |
| public void remove() { |
| iterator.remove(); |
| } |
| }; |
| }; |
| } |
| |
| @Override |
| public Set<String> supportedFileAttributeViews() { |
| return delegate.supportedFileAttributeViews(); |
| } |
| |
| @Override |
| public Path getPath(String first, String... more) { |
| return new FilterPath(delegate.getPath(first, more), this); |
| } |
| |
| @Override |
| public PathMatcher getPathMatcher(String syntaxAndPattern) { |
| final PathMatcher matcher = delegate.getPathMatcher(syntaxAndPattern); |
| return path -> { |
| if (path instanceof FilterPath) { |
| return matcher.matches(((FilterPath)path).delegate); |
| } |
| return false; |
| }; |
| } |
| |
| @Override |
| public UserPrincipalLookupService getUserPrincipalLookupService() { |
| return delegate.getUserPrincipalLookupService(); |
| } |
| |
| @Override |
| public WatchService newWatchService() throws IOException { |
| return delegate.newWatchService(); |
| } |
| |
| /** Returns the {@code FileSystem} we wrap. */ |
| public FileSystem getDelegate() { |
| return delegate; |
| } |
| |
| /** Returns the {@code FilterFileSystemProvider} sent to this on init. */ |
| public FileSystemProvider getParent() { |
| return parent; |
| } |
| } |