co.paralleluniverse.common.ZipFS Maven / Gradle / Ivy
/*
* Capsule
* Copyright (c) 2014-2015, Parallel Universe Software Co. All rights reserved.
*
* This program and the accompanying materials are licensed under the terms
* of the Eclipse Public License v1.0, available at
* http://www.eclipse.org/legal/epl-v10.html
*/
package co.paralleluniverse.common;
import static co.paralleluniverse.common.Exceptions.rethrow;
import com.sun.nio.zipfs.ZipFileSystem;
import com.sun.nio.zipfs.ZipFileSystemProvider;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.nio.file.FileSystem;
import java.nio.file.Path;
import java.nio.file.spi.FileSystemProvider;
import java.util.Collections;
import java.util.Map;
/**
* Bypasses the check in ZipFileSystemProvider.newFileSystem that verifies that the given path is in the default FileSystem.
* This is a JDK bug, fixed in JDK 8. See https://bugs.openjdk.java.net/browse/JDK-8004789
*/
public final class ZipFS {
private static final ZipFileSystemProvider ZIP_FILE_SYSTEM_PROVIDER = getZipFileSystemProvider();
private static final Constructor ZIP_FILE_SYSTEM_CONSTRUCTOR;
static {
try {
Constructor c = ZipFileSystem.class.getDeclaredConstructor(ZipFileSystemProvider.class, Path.class, Map.class);
c.setAccessible(true);
ZIP_FILE_SYSTEM_CONSTRUCTOR = c;
} catch (NoSuchMethodException e) {
throw new AssertionError(e);
}
}
private static ZipFileSystemProvider getZipFileSystemProvider() {
for (FileSystemProvider fsr : FileSystemProvider.installedProviders()) {
if (fsr instanceof ZipFileSystemProvider)
return (ZipFileSystemProvider) fsr;
}
throw new AssertionError("Zip file system not installed!");
}
public static FileSystem newZipFileSystem(Path path) throws IOException {
// return FileSystems.newFileSystem(path, null);
if (path.getFileSystem() instanceof ZipFileSystem)
throw new IllegalArgumentException("Can't create a ZIP file system nested in a ZIP file system. (" + path + " is nested in " + path.getFileSystem() + ")");
try {
return (ZipFileSystem) ZIP_FILE_SYSTEM_CONSTRUCTOR.newInstance(ZIP_FILE_SYSTEM_PROVIDER, path, Collections.emptyMap());
} catch (ReflectiveOperationException e) {
throw new AssertionError(e);
} catch(Exception e) {
throw rethrow(e);
}
}
private ZipFS() {
}
}