| /* |
| * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.module; |
| |
| import java.io.File; |
| import java.io.IOError; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.UncheckedIOException; |
| import java.lang.module.ModuleReader; |
| import java.lang.module.ModuleReference; |
| import java.net.URI; |
| import java.nio.ByteBuffer; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.concurrent.locks.Lock; |
| import java.util.concurrent.locks.ReadWriteLock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| import java.util.function.Supplier; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| import java.util.zip.ZipFile; |
| |
| import jdk.internal.jmod.JmodFile; |
| import jdk.internal.misc.JavaLangAccess; |
| import jdk.internal.misc.SharedSecrets; |
| import jdk.internal.module.ModuleHashes.HashSupplier; |
| import jdk.internal.util.jar.VersionedStream; |
| import sun.net.www.ParseUtil; |
| |
| |
| /** |
| * A factory for creating ModuleReference implementations where the modules are |
| * packaged as modular JAR file, JMOD files or where the modules are exploded |
| * on the file system. |
| */ |
| |
| class ModuleReferences { |
| |
| private static final JavaLangAccess JLA = SharedSecrets.getJavaLangAccess(); |
| |
| private ModuleReferences() { } |
| |
| /** |
| * Creates a ModuleReference to a module or to patched module when |
| * creating modules for the boot Layer and --patch-module is specified. |
| */ |
| private static ModuleReference newModule(ModuleInfo.Attributes attrs, |
| URI uri, |
| Supplier<ModuleReader> supplier, |
| HashSupplier hasher) { |
| |
| ModuleReference mref = new ModuleReferenceImpl(attrs.descriptor(), |
| uri, |
| supplier, |
| null, |
| attrs.recordedHashes(), |
| hasher, |
| attrs.moduleResolution()); |
| if (JLA.getBootLayer() == null) |
| mref = ModuleBootstrap.patcher().patchIfNeeded(mref); |
| |
| return mref; |
| } |
| |
| /** |
| * Creates a ModuleReference to a module packaged as a modular JAR. |
| */ |
| static ModuleReference newJarModule(ModuleInfo.Attributes attrs, Path file) { |
| URI uri = file.toUri(); |
| Supplier<ModuleReader> supplier = () -> new JarModuleReader(file, uri); |
| HashSupplier hasher = (a) -> ModuleHashes.computeHash(file, a); |
| return newModule(attrs, uri, supplier, hasher); |
| } |
| |
| /** |
| * Creates a ModuleReference to a module packaged as a JMOD. |
| */ |
| static ModuleReference newJModModule(ModuleInfo.Attributes attrs, Path file) { |
| URI uri = file.toUri(); |
| Supplier<ModuleReader> supplier = () -> new JModModuleReader(file, uri); |
| HashSupplier hasher = (a) -> ModuleHashes.computeHash(file, a); |
| return newModule(attrs, uri, supplier, hasher); |
| } |
| |
| /** |
| * Creates a ModuleReference to an exploded module. |
| */ |
| static ModuleReference newExplodedModule(ModuleInfo.Attributes attrs, Path dir) { |
| Supplier<ModuleReader> supplier = () -> new ExplodedModuleReader(dir); |
| return newModule(attrs, dir.toUri(), supplier, null); |
| } |
| |
| |
| /** |
| * A base module reader that encapsulates machinery required to close the |
| * module reader safely. |
| */ |
| static abstract class SafeCloseModuleReader implements ModuleReader { |
| |
| // RW lock to support safe close |
| private final ReadWriteLock lock = new ReentrantReadWriteLock(); |
| private final Lock readLock = lock.readLock(); |
| private final Lock writeLock = lock.writeLock(); |
| private boolean closed; |
| |
| SafeCloseModuleReader() { } |
| |
| /** |
| * Returns a URL to resource. This method is invoked by the find |
| * method to do the actual work of finding the resource. |
| */ |
| abstract Optional<URI> implFind(String name) throws IOException; |
| |
| /** |
| * Returns an input stream for reading a resource. This method is |
| * invoked by the open method to do the actual work of opening |
| * an input stream to the resource. |
| */ |
| abstract Optional<InputStream> implOpen(String name) throws IOException; |
| |
| /** |
| * Returns a stream of the names of resources in the module. This |
| * method is invoked by the list method to do the actual work of |
| * creating the stream. |
| */ |
| abstract Stream<String> implList() throws IOException; |
| |
| /** |
| * Closes the module reader. This method is invoked by close to do the |
| * actual work of closing the module reader. |
| */ |
| abstract void implClose() throws IOException; |
| |
| @Override |
| public final Optional<URI> find(String name) throws IOException { |
| readLock.lock(); |
| try { |
| if (!closed) { |
| return implFind(name); |
| } else { |
| throw new IOException("ModuleReader is closed"); |
| } |
| } finally { |
| readLock.unlock(); |
| } |
| } |
| |
| |
| @Override |
| public final Optional<InputStream> open(String name) throws IOException { |
| readLock.lock(); |
| try { |
| if (!closed) { |
| return implOpen(name); |
| } else { |
| throw new IOException("ModuleReader is closed"); |
| } |
| } finally { |
| readLock.unlock(); |
| } |
| } |
| |
| @Override |
| public final Stream<String> list() throws IOException { |
| readLock.lock(); |
| try { |
| if (!closed) { |
| return implList(); |
| } else { |
| throw new IOException("ModuleReader is closed"); |
| } |
| } finally { |
| readLock.unlock(); |
| } |
| } |
| |
| @Override |
| public final void close() throws IOException { |
| writeLock.lock(); |
| try { |
| if (!closed) { |
| closed = true; |
| implClose(); |
| } |
| } finally { |
| writeLock.unlock(); |
| } |
| } |
| } |
| |
| |
| /** |
| * A ModuleReader for a modular JAR file. |
| */ |
| static class JarModuleReader extends SafeCloseModuleReader { |
| private final JarFile jf; |
| private final URI uri; |
| |
| static JarFile newJarFile(Path path) { |
| try { |
| return new JarFile(path.toFile(), |
| true, // verify |
| ZipFile.OPEN_READ, |
| JarFile.runtimeVersion()); |
| } catch (IOException ioe) { |
| throw new UncheckedIOException(ioe); |
| } |
| } |
| |
| JarModuleReader(Path path, URI uri) { |
| this.jf = newJarFile(path); |
| this.uri = uri; |
| } |
| |
| private JarEntry getEntry(String name) { |
| return jf.getJarEntry(Objects.requireNonNull(name)); |
| } |
| |
| @Override |
| Optional<URI> implFind(String name) throws IOException { |
| JarEntry je = getEntry(name); |
| if (je != null) { |
| if (jf.isMultiRelease()) |
| name = SharedSecrets.javaUtilJarAccess().getRealName(jf, je); |
| String encodedPath = ParseUtil.encodePath(name, false); |
| String uris = "jar:" + uri + "!/" + encodedPath; |
| return Optional.of(URI.create(uris)); |
| } else { |
| return Optional.empty(); |
| } |
| } |
| |
| @Override |
| Optional<InputStream> implOpen(String name) throws IOException { |
| JarEntry je = getEntry(name); |
| if (je != null) { |
| return Optional.of(jf.getInputStream(je)); |
| } else { |
| return Optional.empty(); |
| } |
| } |
| |
| @Override |
| Stream<String> implList() throws IOException { |
| // take snapshot to avoid async close |
| List<String> names = VersionedStream.stream(jf) |
| .filter(e -> !e.isDirectory()) |
| .map(JarEntry::getName) |
| .collect(Collectors.toList()); |
| return names.stream(); |
| } |
| |
| @Override |
| void implClose() throws IOException { |
| jf.close(); |
| } |
| } |
| |
| |
| /** |
| * A ModuleReader for a JMOD file. |
| */ |
| static class JModModuleReader extends SafeCloseModuleReader { |
| private final JmodFile jf; |
| private final URI uri; |
| |
| static JmodFile newJmodFile(Path path) { |
| try { |
| return new JmodFile(path); |
| } catch (IOException ioe) { |
| throw new UncheckedIOException(ioe); |
| } |
| } |
| |
| JModModuleReader(Path path, URI uri) { |
| this.jf = newJmodFile(path); |
| this.uri = uri; |
| } |
| |
| private JmodFile.Entry getEntry(String name) { |
| Objects.requireNonNull(name); |
| return jf.getEntry(JmodFile.Section.CLASSES, name); |
| } |
| |
| @Override |
| Optional<URI> implFind(String name) { |
| JmodFile.Entry je = getEntry(name); |
| if (je != null) { |
| String encodedPath = ParseUtil.encodePath(name, false); |
| String uris = "jmod:" + uri + "!/" + encodedPath; |
| return Optional.of(URI.create(uris)); |
| } else { |
| return Optional.empty(); |
| } |
| } |
| |
| @Override |
| Optional<InputStream> implOpen(String name) throws IOException { |
| JmodFile.Entry je = getEntry(name); |
| if (je != null) { |
| return Optional.of(jf.getInputStream(je)); |
| } else { |
| return Optional.empty(); |
| } |
| } |
| |
| @Override |
| Stream<String> implList() throws IOException { |
| // take snapshot to avoid async close |
| List<String> names = jf.stream() |
| .filter(e -> e.section() == JmodFile.Section.CLASSES) |
| .map(JmodFile.Entry::name) |
| .collect(Collectors.toList()); |
| return names.stream(); |
| } |
| |
| @Override |
| void implClose() throws IOException { |
| jf.close(); |
| } |
| } |
| |
| |
| /** |
| * A ModuleReader for an exploded module. |
| */ |
| static class ExplodedModuleReader implements ModuleReader { |
| private final Path dir; |
| private volatile boolean closed; |
| |
| ExplodedModuleReader(Path dir) { |
| this.dir = dir; |
| |
| // when running with a security manager then check that the caller |
| // has access to the directory. |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| boolean unused = Files.isDirectory(dir); |
| } |
| } |
| |
| /** |
| * Returns a Path to access to the given resource. |
| */ |
| private Path toPath(String name) { |
| Path path = Paths.get(name.replace('/', File.separatorChar)); |
| if (path.getRoot() == null) { |
| return dir.resolve(path); |
| } else { |
| // drop the root component so that the resource is |
| // located relative to the module directory |
| int n = path.getNameCount(); |
| return (n > 0) ? dir.resolve(path.subpath(0, n)) : null; |
| } |
| } |
| |
| /** |
| * Throws IOException if the module reader is closed; |
| */ |
| private void ensureOpen() throws IOException { |
| if (closed) throw new IOException("ModuleReader is closed"); |
| } |
| |
| @Override |
| public Optional<URI> find(String name) throws IOException { |
| ensureOpen(); |
| Path path = toPath(name); |
| if (path != null && Files.isRegularFile(path)) { |
| try { |
| return Optional.of(path.toUri()); |
| } catch (IOError e) { |
| throw (IOException) e.getCause(); |
| } |
| } else { |
| return Optional.empty(); |
| } |
| } |
| |
| @Override |
| public Optional<InputStream> open(String name) throws IOException { |
| ensureOpen(); |
| Path path = toPath(name); |
| if (path != null && Files.isRegularFile(path)) { |
| return Optional.of(Files.newInputStream(path)); |
| } else { |
| return Optional.empty(); |
| } |
| } |
| |
| @Override |
| public Optional<ByteBuffer> read(String name) throws IOException { |
| ensureOpen(); |
| Path path = toPath(name); |
| if (path != null && Files.isRegularFile(path)) { |
| return Optional.of(ByteBuffer.wrap(Files.readAllBytes(path))); |
| } else { |
| return Optional.empty(); |
| } |
| } |
| |
| @Override |
| public Stream<String> list() throws IOException { |
| ensureOpen(); |
| // sym links not followed |
| return Files.find(dir, Integer.MAX_VALUE, |
| (path, attrs) -> attrs.isRegularFile()) |
| .map(f -> dir.relativize(f) |
| .toString() |
| .replace(File.separatorChar, '/')); |
| } |
| |
| @Override |
| public void close() { |
| closed = true; |
| } |
| } |
| |
| } |