author | alanb |
Fri, 17 Jun 2016 08:41:39 +0100 | |
changeset 39050 | 9de41b79ec7e |
parent 37779 | 7c84df693837 |
child 39646 | 2bf99fe5023b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.lang.module; |
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import java.io.BufferedInputStream; |
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import java.io.BufferedReader; |
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import java.io.File; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.InputStreamReader; |
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import java.io.UncheckedIOException; |
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import java.lang.module.ModuleDescriptor.Requires; |
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import java.nio.file.DirectoryStream; |
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import java.nio.file.Files; |
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import java.nio.file.NoSuchFileException; |
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import java.nio.file.Path; |
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import java.nio.file.attribute.BasicFileAttributes; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.LinkedHashSet; |
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import java.util.Map; |
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import java.util.Objects; |
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import java.util.Optional; |
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import java.util.Set; |
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import java.util.jar.Attributes; |
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import java.util.jar.JarEntry; |
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import java.util.jar.JarFile; |
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import java.util.jar.Manifest; |
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import java.util.regex.Matcher; |
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import java.util.regex.Pattern; |
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import java.util.stream.Collectors; |
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import java.util.zip.ZipEntry; |
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import java.util.zip.ZipFile; |
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import jdk.internal.module.ConfigurableModuleFinder; |
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import jdk.internal.perf.PerfCounter; |
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/** |
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* A {@code ModuleFinder} that locates modules on the file system by searching |
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* a sequence of directories or packaged modules. |
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* |
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* The {@code ModuleFinder} can be configured to work in either the run-time |
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* or link-time phases. In both cases it locates modular JAR and exploded |
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* modules. When configured for link-time then it additionally locates |
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* modules in JMOD files. |
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*/ |
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class ModulePath implements ConfigurableModuleFinder { |
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private static final String MODULE_INFO = "module-info.class"; |
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// the entries on this module path |
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private final Path[] entries; |
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private int next; |
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// true if in the link phase |
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private boolean isLinkPhase; |
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// map of module name to module reference map for modules already located |
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private final Map<String, ModuleReference> cachedModules = new HashMap<>(); |
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ModulePath(Path... entries) { |
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this.entries = entries.clone(); |
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for (Path entry : this.entries) { |
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Objects.requireNonNull(entry); |
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} |
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} |
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@Override |
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public void configurePhase(Phase phase) { |
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isLinkPhase = (phase == Phase.LINK_TIME); |
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} |
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@Override |
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public Optional<ModuleReference> find(String name) { |
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Objects.requireNonNull(name); |
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// try cached modules |
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ModuleReference m = cachedModules.get(name); |
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if (m != null) |
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return Optional.of(m); |
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// the module may not have been encountered yet |
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while (hasNextEntry()) { |
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scanNextEntry(); |
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m = cachedModules.get(name); |
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if (m != null) |
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return Optional.of(m); |
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} |
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return Optional.empty(); |
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} |
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@Override |
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public Set<ModuleReference> findAll() { |
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// need to ensure that all entries have been scanned |
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while (hasNextEntry()) { |
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scanNextEntry(); |
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} |
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return cachedModules.values().stream().collect(Collectors.toSet()); |
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} |
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/** |
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* Returns {@code true} if there are additional entries to scan |
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*/ |
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private boolean hasNextEntry() { |
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return next < entries.length; |
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} |
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/** |
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* Scans the next entry on the module path. A no-op if all entries have |
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* already been scanned. |
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* |
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* @throws FindException if an error occurs scanning the next entry |
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*/ |
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private void scanNextEntry() { |
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if (hasNextEntry()) { |
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long t0 = System.nanoTime(); |
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Path entry = entries[next]; |
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Map<String, ModuleReference> modules = scan(entry); |
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next++; |
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// update cache, ignoring duplicates |
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int initialSize = cachedModules.size(); |
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for (Map.Entry<String, ModuleReference> e : modules.entrySet()) { |
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cachedModules.putIfAbsent(e.getKey(), e.getValue()); |
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} |
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// update counters |
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int added = cachedModules.size() - initialSize; |
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moduleCount.add(added); |
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scanTime.addElapsedTimeFrom(t0); |
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} |
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} |
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/** |
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* Scan the given module path entry. If the entry is a directory then it is |
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* a directory of modules or an exploded module. If the entry is a regular |
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* file then it is assumed to be a packaged module. |
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* |
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* @throws FindException if an error occurs scanning the entry |
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*/ |
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private Map<String, ModuleReference> scan(Path entry) { |
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BasicFileAttributes attrs; |
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try { |
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attrs = Files.readAttributes(entry, BasicFileAttributes.class); |
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} catch (NoSuchFileException e) { |
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return Collections.emptyMap(); |
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} catch (IOException ioe) { |
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throw new FindException(ioe); |
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} |
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try { |
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if (attrs.isDirectory()) { |
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Path mi = entry.resolve(MODULE_INFO); |
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if (!Files.exists(mi)) { |
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// does not exist or unable to determine so assume a |
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// directory of modules |
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return scanDirectory(entry); |
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} |
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} |
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// packaged or exploded module |
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ModuleReference mref = readModule(entry, attrs); |
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if (mref != null) { |
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String name = mref.descriptor().name(); |
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return Collections.singletonMap(name, mref); |
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} else { |
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// skipped |
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return Collections.emptyMap(); |
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} |
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} catch (IOException ioe) { |
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throw new FindException(ioe); |
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} |
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} |
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/** |
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* Scans the given directory for packaged or exploded modules. |
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* |
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* @return a map of module name to ModuleReference for the modules found |
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* in the directory |
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* |
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* @throws IOException if an I/O error occurs |
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* @throws FindException if an error occurs scanning the entry or the |
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* directory contains two or more modules with the same name |
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*/ |
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private Map<String, ModuleReference> scanDirectory(Path dir) |
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throws IOException |
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{ |
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// The map of name -> mref of modules found in this directory. |
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Map<String, ModuleReference> nameToReference = new HashMap<>(); |
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try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) { |
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for (Path entry : stream) { |
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BasicFileAttributes attrs; |
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try { |
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attrs = Files.readAttributes(entry, BasicFileAttributes.class); |
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} catch (NoSuchFileException ignore) { |
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// file has been removed or moved, ignore for now |
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continue; |
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} |
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ModuleReference mref = readModule(entry, attrs); |
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// module found |
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if (mref != null) { |
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// can have at most one version of a module in the directory |
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String name = mref.descriptor().name(); |
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if (nameToReference.put(name, mref) != null) { |
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throw new FindException("Two versions of module " |
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+ name + " found in " + dir); |
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} |
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} |
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} |
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} |
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return nameToReference; |
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} |
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250 |
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/** |
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* Locates a packaged or exploded module, returning a {@code ModuleReference} |
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* to the module. Returns {@code null} if the entry is skipped because it is |
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* to a directory that does not contain a module-info.class or it's a hidden |
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* file. |
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* |
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* @throws IOException if an I/O error occurs |
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* @throws FindException if the file is not recognized as a module or an |
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* error occurs parsing its module descriptor |
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*/ |
261 |
private ModuleReference readModule(Path entry, BasicFileAttributes attrs) |
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throws IOException |
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{ |
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try { |
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266 |
if (attrs.isDirectory()) { |
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return readExplodedModule(entry); // may return null |
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} |
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String fn = entry.getFileName().toString(); |
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if (attrs.isRegularFile()) { |
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if (fn.endsWith(".jar")) { |
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return readJar(entry); |
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} else if (fn.endsWith(".jmod")) { |
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if (isLinkPhase) |
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return readJMod(entry); |
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throw new FindException("JMOD files not supported: " + entry); |
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} |
279 |
} |
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// skip hidden files |
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if (fn.startsWith(".") || Files.isHidden(entry)) { |
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return null; |
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} else { |
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throw new FindException("Unrecognized module: " + entry); |
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} |
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288 |
} catch (InvalidModuleDescriptorException e) { |
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throw new FindException("Error reading module: " + entry, e); |
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290 |
} |
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291 |
} |
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292 |
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293 |
||
294 |
// -- jmod files -- |
|
295 |
||
296 |
private Set<String> jmodPackages(ZipFile zf) { |
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297 |
return zf.stream() |
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298 |
.filter(e -> e.getName().startsWith("classes/") && |
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299 |
e.getName().endsWith(".class")) |
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.map(e -> toPackageName(e.getName().substring(8))) |
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.filter(pkg -> pkg.length() > 0) // module-info |
302 |
.collect(Collectors.toSet()); |
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303 |
} |
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304 |
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305 |
/** |
|
306 |
* Returns a {@code ModuleReference} to a module in jmod file on the |
|
307 |
* file system. |
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* |
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* @throws IOException |
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* @throws InvalidModuleDescriptorException |
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*/ |
312 |
private ModuleReference readJMod(Path file) throws IOException { |
|
313 |
try (ZipFile zf = new ZipFile(file.toString())) { |
|
314 |
ZipEntry ze = zf.getEntry("classes/" + MODULE_INFO); |
|
315 |
if (ze == null) { |
|
316 |
throw new IOException(MODULE_INFO + " is missing: " + file); |
|
317 |
} |
|
318 |
ModuleDescriptor md; |
|
319 |
try (InputStream in = zf.getInputStream(ze)) { |
|
320 |
md = ModuleDescriptor.read(in, () -> jmodPackages(zf)); |
|
321 |
} |
|
322 |
return ModuleReferences.newJModModule(md, file); |
|
323 |
} |
|
324 |
} |
|
325 |
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326 |
||
327 |
// -- JAR files -- |
|
328 |
||
329 |
private static final String SERVICES_PREFIX = "META-INF/services/"; |
|
330 |
||
331 |
/** |
|
332 |
* Returns a container with the service type corresponding to the name of |
|
333 |
* a services configuration file. |
|
334 |
* |
|
335 |
* For example, if called with "META-INF/services/p.S" then this method |
|
336 |
* returns a container with the value "p.S". |
|
337 |
*/ |
|
338 |
private Optional<String> toServiceName(String cf) { |
|
339 |
assert cf.startsWith(SERVICES_PREFIX); |
|
340 |
int index = cf.lastIndexOf("/") + 1; |
|
341 |
if (index < cf.length()) { |
|
342 |
String prefix = cf.substring(0, index); |
|
343 |
if (prefix.equals(SERVICES_PREFIX)) { |
|
344 |
String sn = cf.substring(index); |
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return Optional.of(sn); |
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} |
347 |
} |
|
348 |
return Optional.empty(); |
|
349 |
} |
|
350 |
||
351 |
/** |
|
352 |
* Reads the next line from the given reader and trims it of comments and |
|
353 |
* leading/trailing white space. |
|
354 |
* |
|
355 |
* Returns null if the reader is at EOF. |
|
356 |
*/ |
|
357 |
private String nextLine(BufferedReader reader) throws IOException { |
|
358 |
String ln = reader.readLine(); |
|
359 |
if (ln != null) { |
|
360 |
int ci = ln.indexOf('#'); |
|
361 |
if (ci >= 0) |
|
362 |
ln = ln.substring(0, ci); |
|
363 |
ln = ln.trim(); |
|
364 |
} |
|
365 |
return ln; |
|
366 |
} |
|
367 |
||
368 |
/** |
|
369 |
* Treat the given JAR file as a module as follows: |
|
370 |
* |
|
371 |
* 1. The module name (and optionally the version) is derived from the file |
|
372 |
* name of the JAR file |
|
373 |
* 2. The packages of all .class files in the JAR file are exported |
|
374 |
* 3. It has no module-private/concealed packages |
|
375 |
* 4. The contents of any META-INF/services configuration files are mapped |
|
376 |
* to "provides" declarations |
|
377 |
* 5. The Main-Class attribute in the main attributes of the JAR manifest |
|
378 |
* is mapped to the module descriptor mainClass |
|
379 |
*/ |
|
380 |
private ModuleDescriptor deriveModuleDescriptor(JarFile jf) |
|
381 |
throws IOException |
|
382 |
{ |
|
383 |
// Derive module name and version from JAR file name |
|
384 |
||
385 |
String fn = jf.getName(); |
|
386 |
int i = fn.lastIndexOf(File.separator); |
|
387 |
if (i != -1) |
|
388 |
fn = fn.substring(i+1); |
|
389 |
||
390 |
// drop .jar |
|
391 |
String mn = fn.substring(0, fn.length()-4); |
|
392 |
String vs = null; |
|
393 |
||
394 |
// find first occurrence of -${NUMBER}. or -${NUMBER}$ |
|
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|
395 |
Matcher matcher = Patterns.DASH_VERSION.matcher(mn); |
36511 | 396 |
if (matcher.find()) { |
397 |
int start = matcher.start(); |
|
398 |
||
399 |
// attempt to parse the tail as a version string |
|
400 |
try { |
|
401 |
String tail = mn.substring(start+1); |
|
402 |
ModuleDescriptor.Version.parse(tail); |
|
403 |
vs = tail; |
|
404 |
} catch (IllegalArgumentException ignore) { } |
|
405 |
||
406 |
mn = mn.substring(0, start); |
|
407 |
} |
|
408 |
||
409 |
// finally clean up the module name |
|
39050
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|
410 |
mn = cleanModuleName(mn); |
36511 | 411 |
|
412 |
// Builder throws IAE if module name is empty or invalid |
|
413 |
ModuleDescriptor.Builder builder |
|
39050
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|
414 |
= new ModuleDescriptor.Builder(mn) |
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|
415 |
.automatic() |
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|
416 |
.requires(Set.of(Requires.Modifier.MANDATED), "java.base"); |
36511 | 417 |
if (vs != null) |
418 |
builder.version(vs); |
|
419 |
||
420 |
// scan the entries in the JAR file to locate the .class and service |
|
421 |
// configuration file |
|
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|
422 |
Map<Boolean, Set<String>> map = |
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|
423 |
jf.stream() |
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|
424 |
.map(JarEntry::getName) |
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|
425 |
.filter(s -> (s.endsWith(".class") ^ s.startsWith(SERVICES_PREFIX))) |
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changeset
|
426 |
.collect(Collectors.partitioningBy(s -> s.endsWith(".class"), |
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changeset
|
427 |
Collectors.toSet())); |
36511 | 428 |
Set<String> classFiles = map.get(Boolean.TRUE); |
429 |
Set<String> configFiles = map.get(Boolean.FALSE); |
|
430 |
||
431 |
// all packages are exported |
|
432 |
classFiles.stream() |
|
433 |
.map(c -> toPackageName(c)) |
|
434 |
.distinct() |
|
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|
435 |
.forEach(builder::exports); |
36511 | 436 |
|
437 |
// map names of service configuration files to service names |
|
438 |
Set<String> serviceNames = configFiles.stream() |
|
439 |
.map(this::toServiceName) |
|
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|
440 |
.flatMap(Optional::stream) |
36511 | 441 |
.collect(Collectors.toSet()); |
442 |
||
443 |
// parse each service configuration file |
|
444 |
for (String sn : serviceNames) { |
|
445 |
JarEntry entry = jf.getJarEntry(SERVICES_PREFIX + sn); |
|
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|
446 |
Set<String> providerClasses = new LinkedHashSet<>(); |
36511 | 447 |
try (InputStream in = jf.getInputStream(entry)) { |
448 |
BufferedReader reader |
|
449 |
= new BufferedReader(new InputStreamReader(in, "UTF-8")); |
|
450 |
String cn; |
|
451 |
while ((cn = nextLine(reader)) != null) { |
|
39050
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|
452 |
if (cn.length() > 0) { |
36511 | 453 |
providerClasses.add(cn); |
454 |
} |
|
455 |
} |
|
456 |
} |
|
457 |
if (!providerClasses.isEmpty()) |
|
458 |
builder.provides(sn, providerClasses); |
|
459 |
} |
|
460 |
||
461 |
// Main-Class attribute if it exists |
|
462 |
Manifest man = jf.getManifest(); |
|
463 |
if (man != null) { |
|
464 |
Attributes attrs = man.getMainAttributes(); |
|
465 |
String mainClass = attrs.getValue(Attributes.Name.MAIN_CLASS); |
|
466 |
if (mainClass != null) |
|
467 |
builder.mainClass(mainClass); |
|
468 |
} |
|
469 |
||
470 |
return builder.build(); |
|
471 |
} |
|
472 |
||
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|
473 |
/** |
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diff
changeset
|
474 |
* Patterns used to derive the module name from a JAR file name. |
9de41b79ec7e
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changeset
|
475 |
*/ |
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|
476 |
private static class Patterns { |
9de41b79ec7e
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diff
changeset
|
477 |
static final Pattern DASH_VERSION = Pattern.compile("-(\\d+(\\.|$))"); |
9de41b79ec7e
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|
478 |
static final Pattern NON_ALPHANUM = Pattern.compile("[^A-Za-z0-9]"); |
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changeset
|
479 |
static final Pattern REPEATING_DOTS = Pattern.compile("(\\.)(\\1)+"); |
9de41b79ec7e
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changeset
|
480 |
static final Pattern LEADING_DOTS = Pattern.compile("^\\."); |
9de41b79ec7e
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changeset
|
481 |
static final Pattern TRAILING_DOTS = Pattern.compile("\\.$"); |
9de41b79ec7e
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parents:
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diff
changeset
|
482 |
} |
9de41b79ec7e
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parents:
37779
diff
changeset
|
483 |
|
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
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parents:
37779
diff
changeset
|
484 |
/** |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
485 |
* Clean up candidate module name derived from a JAR file name. |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
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parents:
37779
diff
changeset
|
486 |
*/ |
9de41b79ec7e
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changeset
|
487 |
private static String cleanModuleName(String mn) { |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
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parents:
37779
diff
changeset
|
488 |
// replace non-alphanumeric |
9de41b79ec7e
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parents:
37779
diff
changeset
|
489 |
mn = Patterns.NON_ALPHANUM.matcher(mn).replaceAll("."); |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
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parents:
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diff
changeset
|
490 |
|
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
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parents:
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diff
changeset
|
491 |
// collapse repeating dots |
9de41b79ec7e
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diff
changeset
|
492 |
mn = Patterns.REPEATING_DOTS.matcher(mn).replaceAll("."); |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
493 |
|
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
494 |
// drop leading dots |
9de41b79ec7e
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parents:
37779
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changeset
|
495 |
if (mn.length() > 0 && mn.charAt(0) == '.') |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
496 |
mn = Patterns.LEADING_DOTS.matcher(mn).replaceAll(""); |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
497 |
|
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
498 |
// drop trailing dots |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
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parents:
37779
diff
changeset
|
499 |
int len = mn.length(); |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
500 |
if (len > 0 && mn.charAt(len-1) == '.') |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
501 |
mn = Patterns.TRAILING_DOTS.matcher(mn).replaceAll(""); |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
502 |
|
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
503 |
return mn; |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
504 |
} |
9de41b79ec7e
8158456: ModuleDescriptor.read does not verify dependence on java.base in module-info.class
alanb
parents:
37779
diff
changeset
|
505 |
|
36511 | 506 |
private Set<String> jarPackages(JarFile jf) { |
507 |
return jf.stream() |
|
508 |
.filter(e -> e.getName().endsWith(".class")) |
|
37779
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
509 |
.map(e -> toPackageName(e.getName())) |
36511 | 510 |
.filter(pkg -> pkg.length() > 0) // module-info |
511 |
.collect(Collectors.toSet()); |
|
512 |
} |
|
513 |
||
514 |
/** |
|
515 |
* Returns a {@code ModuleReference} to a module in modular JAR file on |
|
516 |
* the file system. |
|
37779
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
517 |
* |
7c84df693837
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alanb
parents:
36511
diff
changeset
|
518 |
* @throws IOException |
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
519 |
* @throws FindException |
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
520 |
* @throws InvalidModuleDescriptorException |
36511 | 521 |
*/ |
522 |
private ModuleReference readJar(Path file) throws IOException { |
|
37779
7c84df693837
8154956: Module system implementation refresh (4/2016)
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parents:
36511
diff
changeset
|
523 |
try (JarFile jf = new JarFile(file.toFile(), |
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
524 |
true, // verify |
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
525 |
ZipFile.OPEN_READ, |
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
526 |
JarFile.Release.RUNTIME)) |
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
527 |
{ |
36511 | 528 |
ModuleDescriptor md; |
529 |
JarEntry entry = jf.getJarEntry(MODULE_INFO); |
|
530 |
if (entry == null) { |
|
531 |
||
532 |
// no module-info.class so treat it as automatic module |
|
533 |
try { |
|
534 |
md = deriveModuleDescriptor(jf); |
|
535 |
} catch (IllegalArgumentException iae) { |
|
536 |
throw new FindException( |
|
537 |
"Unable to derive module descriptor for: " |
|
538 |
+ jf.getName(), iae); |
|
539 |
} |
|
540 |
||
541 |
} else { |
|
542 |
md = ModuleDescriptor.read(jf.getInputStream(entry), |
|
543 |
() -> jarPackages(jf)); |
|
544 |
} |
|
545 |
||
546 |
return ModuleReferences.newJarModule(md, file); |
|
547 |
} |
|
548 |
} |
|
549 |
||
550 |
||
551 |
// -- exploded directories -- |
|
552 |
||
553 |
private Set<String> explodedPackages(Path dir) { |
|
554 |
try { |
|
555 |
return Files.find(dir, Integer.MAX_VALUE, |
|
556 |
((path, attrs) -> attrs.isRegularFile() && |
|
557 |
path.toString().endsWith(".class"))) |
|
558 |
.map(path -> toPackageName(dir.relativize(path))) |
|
559 |
.filter(pkg -> pkg.length() > 0) // module-info |
|
560 |
.collect(Collectors.toSet()); |
|
561 |
} catch (IOException x) { |
|
562 |
throw new UncheckedIOException(x); |
|
563 |
} |
|
564 |
} |
|
565 |
||
566 |
/** |
|
567 |
* Returns a {@code ModuleReference} to an exploded module on the file |
|
568 |
* system or {@code null} if {@code module-info.class} not found. |
|
37779
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
569 |
* |
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
570 |
* @throws IOException |
7c84df693837
8154956: Module system implementation refresh (4/2016)
alanb
parents:
36511
diff
changeset
|
571 |
* @throws InvalidModuleDescriptorException |
36511 | 572 |
*/ |
573 |
private ModuleReference readExplodedModule(Path dir) throws IOException { |
|
574 |
Path mi = dir.resolve(MODULE_INFO); |
|
575 |
ModuleDescriptor md; |
|
576 |
try (InputStream in = Files.newInputStream(mi)) { |
|
577 |
md = ModuleDescriptor.read(new BufferedInputStream(in), |
|
578 |
() -> explodedPackages(dir)); |
|
579 |
} catch (NoSuchFileException e) { |
|
580 |
// for now |
|
581 |
return null; |
|
582 |
} |
|
583 |
return ModuleReferences.newExplodedModule(md, dir); |
|
584 |
} |
|
585 |
||
586 |
||
587 |
// |
|
588 |
||
589 |
// p/q/T.class => p.q |
|
590 |
private String toPackageName(String cn) { |
|
591 |
assert cn.endsWith(".class"); |
|
592 |
int start = 0; |
|
593 |
int index = cn.lastIndexOf("/"); |
|
594 |
if (index > start) { |
|
595 |
return cn.substring(start, index).replace('/', '.'); |
|
596 |
} else { |
|
597 |
return ""; |
|
598 |
} |
|
599 |
} |
|
600 |
||
601 |
private String toPackageName(Path path) { |
|
602 |
String name = path.toString(); |
|
603 |
assert name.endsWith(".class"); |
|
604 |
int index = name.lastIndexOf(File.separatorChar); |
|
605 |
if (index != -1) { |
|
606 |
return name.substring(0, index).replace(File.separatorChar, '.'); |
|
607 |
} else { |
|
608 |
return ""; |
|
609 |
} |
|
610 |
} |
|
611 |
||
612 |
private static final PerfCounter scanTime |
|
613 |
= PerfCounter.newPerfCounter("jdk.module.finder.modulepath.scanTime"); |
|
614 |
private static final PerfCounter moduleCount |
|
615 |
= PerfCounter.newPerfCounter("jdk.module.finder.modulepath.modules"); |
|
616 |
} |