| /* |
| * Copyright (c) 2014, 2017, 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.BufferedInputStream; |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.UncheckedIOException; |
| import java.lang.module.FindException; |
| import java.lang.module.InvalidModuleDescriptorException; |
| import java.lang.module.ModuleDescriptor; |
| import java.lang.module.ModuleDescriptor.Builder; |
| import java.lang.module.ModuleFinder; |
| import java.lang.module.ModuleReference; |
| import java.net.URI; |
| import java.nio.file.DirectoryStream; |
| import java.nio.file.Files; |
| import java.nio.file.NoSuchFileException; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.nio.file.attribute.BasicFileAttributes; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.jar.Attributes; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| import java.util.jar.Manifest; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import java.util.stream.Collectors; |
| import java.util.zip.ZipException; |
| import java.util.zip.ZipFile; |
| |
| import jdk.internal.jmod.JmodFile; |
| import jdk.internal.jmod.JmodFile.Section; |
| import jdk.internal.perf.PerfCounter; |
| import jdk.internal.util.jar.VersionedStream; |
| |
| |
| /** |
| * A {@code ModuleFinder} that locates modules on the file system by searching |
| * a sequence of directories or packaged modules. The ModuleFinder can be |
| * created to work in either the run-time or link-time phases. In both cases it |
| * locates modular JAR and exploded modules. When created for link-time then it |
| * additionally locates modules in JMOD files. The ModuleFinder can also |
| * optionally patch any modules that it locates with a ModulePatcher. |
| */ |
| |
| public class ModulePath implements ModuleFinder { |
| private static final String MODULE_INFO = "module-info.class"; |
| |
| // the version to use for multi-release modular JARs |
| private final Runtime.Version releaseVersion; |
| |
| // true for the link phase (supports modules packaged in JMOD format) |
| private final boolean isLinkPhase; |
| |
| // for patching modules, can be null |
| private final ModulePatcher patcher; |
| |
| // the entries on this module path |
| private final Path[] entries; |
| private int next; |
| |
| // map of module name to module reference map for modules already located |
| private final Map<String, ModuleReference> cachedModules = new HashMap<>(); |
| |
| |
| private ModulePath(Runtime.Version version, |
| boolean isLinkPhase, |
| ModulePatcher patcher, |
| Path... entries) { |
| this.releaseVersion = version; |
| this.isLinkPhase = isLinkPhase; |
| this.patcher = patcher; |
| this.entries = entries.clone(); |
| for (Path entry : this.entries) { |
| Objects.requireNonNull(entry); |
| } |
| } |
| |
| /** |
| * Returns a ModuleFinder that that locates modules on the file system by |
| * searching a sequence of directories and/or packaged modules. The modules |
| * may be patched by the given ModulePatcher. |
| */ |
| public static ModuleFinder of(ModulePatcher patcher, Path... entries) { |
| return new ModulePath(JarFile.runtimeVersion(), false, patcher, entries); |
| } |
| |
| /** |
| * Returns a ModuleFinder that that locates modules on the file system by |
| * searching a sequence of directories and/or packaged modules. |
| */ |
| public static ModuleFinder of(Path... entries) { |
| return of((ModulePatcher)null, entries); |
| } |
| |
| /** |
| * Returns a ModuleFinder that that locates modules on the file system by |
| * searching a sequence of directories and/or packaged modules. |
| * |
| * @param version The release version to use for multi-release JAR files |
| * @param isLinkPhase {@code true} if the link phase to locate JMOD files |
| */ |
| public static ModuleFinder of(Runtime.Version version, |
| boolean isLinkPhase, |
| Path... entries) { |
| return new ModulePath(version, isLinkPhase, null, entries); |
| } |
| |
| |
| @Override |
| public Optional<ModuleReference> find(String name) { |
| Objects.requireNonNull(name); |
| |
| // try cached modules |
| ModuleReference m = cachedModules.get(name); |
| if (m != null) |
| return Optional.of(m); |
| |
| // the module may not have been encountered yet |
| while (hasNextEntry()) { |
| scanNextEntry(); |
| m = cachedModules.get(name); |
| if (m != null) |
| return Optional.of(m); |
| } |
| return Optional.empty(); |
| } |
| |
| @Override |
| public Set<ModuleReference> findAll() { |
| // need to ensure that all entries have been scanned |
| while (hasNextEntry()) { |
| scanNextEntry(); |
| } |
| return cachedModules.values().stream().collect(Collectors.toSet()); |
| } |
| |
| /** |
| * Returns {@code true} if there are additional entries to scan |
| */ |
| private boolean hasNextEntry() { |
| return next < entries.length; |
| } |
| |
| /** |
| * Scans the next entry on the module path. A no-op if all entries have |
| * already been scanned. |
| * |
| * @throws FindException if an error occurs scanning the next entry |
| */ |
| private void scanNextEntry() { |
| if (hasNextEntry()) { |
| |
| long t0 = System.nanoTime(); |
| |
| Path entry = entries[next]; |
| Map<String, ModuleReference> modules = scan(entry); |
| next++; |
| |
| // update cache, ignoring duplicates |
| int initialSize = cachedModules.size(); |
| for (Map.Entry<String, ModuleReference> e : modules.entrySet()) { |
| cachedModules.putIfAbsent(e.getKey(), e.getValue()); |
| } |
| |
| // update counters |
| int added = cachedModules.size() - initialSize; |
| moduleCount.add(added); |
| |
| scanTime.addElapsedTimeFrom(t0); |
| } |
| } |
| |
| |
| /** |
| * Scan the given module path entry. If the entry is a directory then it is |
| * a directory of modules or an exploded module. If the entry is a regular |
| * file then it is assumed to be a packaged module. |
| * |
| * @throws FindException if an error occurs scanning the entry |
| */ |
| private Map<String, ModuleReference> scan(Path entry) { |
| |
| BasicFileAttributes attrs; |
| try { |
| attrs = Files.readAttributes(entry, BasicFileAttributes.class); |
| } catch (NoSuchFileException e) { |
| return Collections.emptyMap(); |
| } catch (IOException ioe) { |
| throw new FindException(ioe); |
| } |
| |
| try { |
| |
| if (attrs.isDirectory()) { |
| Path mi = entry.resolve(MODULE_INFO); |
| if (!Files.exists(mi)) { |
| // assume a directory of modules |
| return scanDirectory(entry); |
| } |
| } |
| |
| // packaged or exploded module |
| ModuleReference mref = readModule(entry, attrs); |
| if (mref != null) { |
| String name = mref.descriptor().name(); |
| return Collections.singletonMap(name, mref); |
| } |
| |
| // not recognized |
| String msg; |
| if (!isLinkPhase && entry.toString().endsWith(".jmod")) { |
| msg = "JMOD format not supported at execution time"; |
| } else { |
| msg = "Module format not recognized"; |
| } |
| throw new FindException(msg + ": " + entry); |
| |
| } catch (IOException ioe) { |
| throw new FindException(ioe); |
| } |
| } |
| |
| |
| /** |
| * Scans the given directory for packaged or exploded modules. |
| * |
| * @return a map of module name to ModuleReference for the modules found |
| * in the directory |
| * |
| * @throws IOException if an I/O error occurs |
| * @throws FindException if an error occurs scanning the entry or the |
| * directory contains two or more modules with the same name |
| */ |
| private Map<String, ModuleReference> scanDirectory(Path dir) |
| throws IOException |
| { |
| // The map of name -> mref of modules found in this directory. |
| Map<String, ModuleReference> nameToReference = new HashMap<>(); |
| |
| try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) { |
| for (Path entry : stream) { |
| BasicFileAttributes attrs; |
| try { |
| attrs = Files.readAttributes(entry, BasicFileAttributes.class); |
| } catch (NoSuchFileException ignore) { |
| // file has been removed or moved, ignore for now |
| continue; |
| } |
| |
| ModuleReference mref = readModule(entry, attrs); |
| |
| // module found |
| if (mref != null) { |
| // can have at most one version of a module in the directory |
| String name = mref.descriptor().name(); |
| ModuleReference previous = nameToReference.put(name, mref); |
| if (previous != null) { |
| String fn1 = fileName(mref); |
| String fn2 = fileName(previous); |
| throw new FindException("Two versions of module " |
| + name + " found in " + dir |
| + " (" + fn1 + " and " + fn2 + ")"); |
| } |
| } |
| } |
| } |
| |
| return nameToReference; |
| } |
| |
| |
| /** |
| * Reads a packaged or exploded module, returning a {@code ModuleReference} |
| * to the module. Returns {@code null} if the entry is not recognized. |
| * |
| * @throws IOException if an I/O error occurs |
| * @throws FindException if an error occurs parsing its module descriptor |
| */ |
| private ModuleReference readModule(Path entry, BasicFileAttributes attrs) |
| throws IOException |
| { |
| try { |
| |
| // exploded module |
| if (attrs.isDirectory()) { |
| return readExplodedModule(entry); // may return null |
| } |
| |
| // JAR or JMOD file |
| if (attrs.isRegularFile()) { |
| String fn = entry.getFileName().toString(); |
| boolean isDefaultFileSystem = isDefaultFileSystem(entry); |
| |
| // JAR file |
| if (fn.endsWith(".jar")) { |
| if (isDefaultFileSystem) { |
| return readJar(entry); |
| } else { |
| // the JAR file is in a custom file system so |
| // need to copy it to the local file system |
| Path tmpdir = Files.createTempDirectory("mlib"); |
| Path target = Files.copy(entry, tmpdir.resolve(fn)); |
| return readJar(target); |
| } |
| } |
| |
| // JMOD file |
| if (isDefaultFileSystem && isLinkPhase && fn.endsWith(".jmod")) { |
| return readJMod(entry); |
| } |
| } |
| |
| return null; |
| |
| } catch (InvalidModuleDescriptorException e) { |
| throw new FindException("Error reading module: " + entry, e); |
| } |
| } |
| |
| /** |
| * Returns a string with the file name of the module if possible. |
| * If the module location is not a file URI then return the URI |
| * as a string. |
| */ |
| private String fileName(ModuleReference mref) { |
| URI uri = mref.location().orElse(null); |
| if (uri != null) { |
| if (uri.getScheme().equalsIgnoreCase("file")) { |
| Path file = Paths.get(uri); |
| return file.getFileName().toString(); |
| } else { |
| return uri.toString(); |
| } |
| } else { |
| return "<unknown>"; |
| } |
| } |
| |
| // -- JMOD files -- |
| |
| private Set<String> jmodPackages(JmodFile jf) { |
| return jf.stream() |
| .filter(e -> e.section() == Section.CLASSES) |
| .map(JmodFile.Entry::name) |
| .map(this::toPackageName) |
| .flatMap(Optional::stream) |
| .collect(Collectors.toSet()); |
| } |
| |
| /** |
| * Returns a {@code ModuleReference} to a module in JMOD file on the |
| * file system. |
| * |
| * @throws IOException |
| * @throws InvalidModuleDescriptorException |
| */ |
| private ModuleReference readJMod(Path file) throws IOException { |
| try (JmodFile jf = new JmodFile(file)) { |
| ModuleInfo.Attributes attrs; |
| try (InputStream in = jf.getInputStream(Section.CLASSES, MODULE_INFO)) { |
| attrs = ModuleInfo.read(in, () -> jmodPackages(jf)); |
| } |
| return ModuleReferences.newJModModule(attrs, file); |
| } |
| } |
| |
| |
| // -- JAR files -- |
| |
| private static final String SERVICES_PREFIX = "META-INF/services/"; |
| |
| private static final Attributes.Name AUTOMATIC_MODULE_NAME |
| = new Attributes.Name("Automatic-Module-Name"); |
| |
| /** |
| * Returns the service type corresponding to the name of a services |
| * configuration file if it is a legal type name. |
| * |
| * For example, if called with "META-INF/services/p.S" then this method |
| * returns a container with the value "p.S". |
| */ |
| private Optional<String> toServiceName(String cf) { |
| assert cf.startsWith(SERVICES_PREFIX); |
| int index = cf.lastIndexOf("/") + 1; |
| if (index < cf.length()) { |
| String prefix = cf.substring(0, index); |
| if (prefix.equals(SERVICES_PREFIX)) { |
| String sn = cf.substring(index); |
| if (Checks.isClassName(sn)) |
| return Optional.of(sn); |
| } |
| } |
| return Optional.empty(); |
| } |
| |
| /** |
| * Reads the next line from the given reader and trims it of comments and |
| * leading/trailing white space. |
| * |
| * Returns null if the reader is at EOF. |
| */ |
| private String nextLine(BufferedReader reader) throws IOException { |
| String ln = reader.readLine(); |
| if (ln != null) { |
| int ci = ln.indexOf('#'); |
| if (ci >= 0) |
| ln = ln.substring(0, ci); |
| ln = ln.trim(); |
| } |
| return ln; |
| } |
| |
| /** |
| * Treat the given JAR file as a module as follows: |
| * |
| * 1. The value of the Automatic-Module-Name attribute is the module name |
| * 2. The version, and the module name when the Automatic-Module-Name |
| * attribute is not present, is derived from the file ame of the JAR file |
| * 3. All packages are derived from the .class files in the JAR file |
| * 4. The contents of any META-INF/services configuration files are mapped |
| * to "provides" declarations |
| * 5. The Main-Class attribute in the main attributes of the JAR manifest |
| * is mapped to the module descriptor mainClass if possible |
| */ |
| private ModuleDescriptor deriveModuleDescriptor(JarFile jf) |
| throws IOException |
| { |
| // Read Automatic-Module-Name attribute if present |
| Manifest man = jf.getManifest(); |
| Attributes attrs = null; |
| String moduleName = null; |
| if (man != null) { |
| attrs = man.getMainAttributes(); |
| if (attrs != null) { |
| moduleName = attrs.getValue(AUTOMATIC_MODULE_NAME); |
| } |
| } |
| |
| // Derive the version, and the module name if needed, from JAR file name |
| String fn = jf.getName(); |
| int i = fn.lastIndexOf(File.separator); |
| if (i != -1) |
| fn = fn.substring(i + 1); |
| |
| // drop ".jar" |
| String name = fn.substring(0, fn.length() - 4); |
| String vs = null; |
| |
| // find first occurrence of -${NUMBER}. or -${NUMBER}$ |
| Matcher matcher = Patterns.DASH_VERSION.matcher(name); |
| if (matcher.find()) { |
| int start = matcher.start(); |
| |
| // attempt to parse the tail as a version string |
| try { |
| String tail = name.substring(start + 1); |
| ModuleDescriptor.Version.parse(tail); |
| vs = tail; |
| } catch (IllegalArgumentException ignore) { } |
| |
| name = name.substring(0, start); |
| } |
| |
| // Create builder, using the name derived from file name when |
| // Automatic-Module-Name not present |
| Builder builder; |
| if (moduleName != null) { |
| try { |
| builder = ModuleDescriptor.newAutomaticModule(moduleName); |
| } catch (IllegalArgumentException e) { |
| throw new FindException(AUTOMATIC_MODULE_NAME + ": " + e.getMessage()); |
| } |
| } else { |
| builder = ModuleDescriptor.newAutomaticModule(cleanModuleName(name)); |
| } |
| |
| // module version if present |
| if (vs != null) |
| builder.version(vs); |
| |
| // scan the names of the entries in the JAR file |
| Map<Boolean, Set<String>> map = VersionedStream.stream(jf) |
| .filter(e -> !e.isDirectory()) |
| .map(JarEntry::getName) |
| .filter(e -> (e.endsWith(".class") ^ e.startsWith(SERVICES_PREFIX))) |
| .collect(Collectors.partitioningBy(e -> e.startsWith(SERVICES_PREFIX), |
| Collectors.toSet())); |
| |
| Set<String> classFiles = map.get(Boolean.FALSE); |
| Set<String> configFiles = map.get(Boolean.TRUE); |
| |
| // the packages containing class files |
| Set<String> packages = classFiles.stream() |
| .map(this::toPackageName) |
| .flatMap(Optional::stream) |
| .distinct() |
| .collect(Collectors.toSet()); |
| |
| // all packages are exported and open |
| builder.packages(packages); |
| |
| // map names of service configuration files to service names |
| Set<String> serviceNames = configFiles.stream() |
| .map(this::toServiceName) |
| .flatMap(Optional::stream) |
| .collect(Collectors.toSet()); |
| |
| // parse each service configuration file |
| for (String sn : serviceNames) { |
| JarEntry entry = jf.getJarEntry(SERVICES_PREFIX + sn); |
| List<String> providerClasses = new ArrayList<>(); |
| try (InputStream in = jf.getInputStream(entry)) { |
| BufferedReader reader |
| = new BufferedReader(new InputStreamReader(in, "UTF-8")); |
| String cn; |
| while ((cn = nextLine(reader)) != null) { |
| if (cn.length() > 0) { |
| String pn = packageName(cn); |
| if (!packages.contains(pn)) { |
| String msg = "Provider class " + cn + " not in module"; |
| throw new InvalidModuleDescriptorException(msg); |
| } |
| providerClasses.add(cn); |
| } |
| } |
| } |
| if (!providerClasses.isEmpty()) |
| builder.provides(sn, providerClasses); |
| } |
| |
| // Main-Class attribute if it exists |
| if (attrs != null) { |
| String mainClass = attrs.getValue(Attributes.Name.MAIN_CLASS); |
| if (mainClass != null) { |
| mainClass = mainClass.replace("/", "."); |
| if (Checks.isClassName(mainClass)) { |
| String pn = packageName(mainClass); |
| if (packages.contains(pn)) { |
| builder.mainClass(mainClass); |
| } |
| } |
| } |
| } |
| |
| return builder.build(); |
| } |
| |
| /** |
| * Patterns used to derive the module name from a JAR file name. |
| */ |
| private static class Patterns { |
| static final Pattern DASH_VERSION = Pattern.compile("-(\\d+(\\.|$))"); |
| static final Pattern NON_ALPHANUM = Pattern.compile("[^A-Za-z0-9]"); |
| static final Pattern REPEATING_DOTS = Pattern.compile("(\\.)(\\1)+"); |
| static final Pattern LEADING_DOTS = Pattern.compile("^\\."); |
| static final Pattern TRAILING_DOTS = Pattern.compile("\\.$"); |
| } |
| |
| /** |
| * Clean up candidate module name derived from a JAR file name. |
| */ |
| private static String cleanModuleName(String mn) { |
| // replace non-alphanumeric |
| mn = Patterns.NON_ALPHANUM.matcher(mn).replaceAll("."); |
| |
| // collapse repeating dots |
| mn = Patterns.REPEATING_DOTS.matcher(mn).replaceAll("."); |
| |
| // drop leading dots |
| if (mn.length() > 0 && mn.charAt(0) == '.') |
| mn = Patterns.LEADING_DOTS.matcher(mn).replaceAll(""); |
| |
| // drop trailing dots |
| int len = mn.length(); |
| if (len > 0 && mn.charAt(len-1) == '.') |
| mn = Patterns.TRAILING_DOTS.matcher(mn).replaceAll(""); |
| |
| return mn; |
| } |
| |
| private Set<String> jarPackages(JarFile jf) { |
| return VersionedStream.stream(jf) |
| .filter(e -> !e.isDirectory()) |
| .map(JarEntry::getName) |
| .map(this::toPackageName) |
| .flatMap(Optional::stream) |
| .collect(Collectors.toSet()); |
| } |
| |
| /** |
| * Returns a {@code ModuleReference} to a module in modular JAR file on |
| * the file system. |
| * |
| * @throws IOException |
| * @throws FindException |
| * @throws InvalidModuleDescriptorException |
| */ |
| private ModuleReference readJar(Path file) throws IOException { |
| try (JarFile jf = new JarFile(file.toFile(), |
| true, // verify |
| ZipFile.OPEN_READ, |
| releaseVersion)) |
| { |
| ModuleInfo.Attributes attrs; |
| JarEntry entry = jf.getJarEntry(MODULE_INFO); |
| if (entry == null) { |
| |
| // no module-info.class so treat it as automatic module |
| try { |
| ModuleDescriptor md = deriveModuleDescriptor(jf); |
| attrs = new ModuleInfo.Attributes(md, null, null, null); |
| } catch (RuntimeException e) { |
| throw new FindException("Unable to derive module descriptor for " |
| + jf.getName(), e); |
| } |
| |
| } else { |
| attrs = ModuleInfo.read(jf.getInputStream(entry), |
| () -> jarPackages(jf)); |
| } |
| |
| return ModuleReferences.newJarModule(attrs, patcher, file); |
| } catch (ZipException e) { |
| throw new FindException("Error reading " + file, e); |
| } |
| } |
| |
| |
| // -- exploded directories -- |
| |
| private Set<String> explodedPackages(Path dir) { |
| try { |
| return Files.find(dir, Integer.MAX_VALUE, |
| ((path, attrs) -> attrs.isRegularFile() && !isHidden(path))) |
| .map(path -> dir.relativize(path)) |
| .map(this::toPackageName) |
| .flatMap(Optional::stream) |
| .collect(Collectors.toSet()); |
| } catch (IOException x) { |
| throw new UncheckedIOException(x); |
| } |
| } |
| |
| /** |
| * Returns a {@code ModuleReference} to an exploded module on the file |
| * system or {@code null} if {@code module-info.class} not found. |
| * |
| * @throws IOException |
| * @throws InvalidModuleDescriptorException |
| */ |
| private ModuleReference readExplodedModule(Path dir) throws IOException { |
| Path mi = dir.resolve(MODULE_INFO); |
| ModuleInfo.Attributes attrs; |
| try (InputStream in = Files.newInputStream(mi)) { |
| attrs = ModuleInfo.read(new BufferedInputStream(in), |
| () -> explodedPackages(dir)); |
| } catch (NoSuchFileException e) { |
| // for now |
| return null; |
| } |
| return ModuleReferences.newExplodedModule(attrs, patcher, dir); |
| } |
| |
| /** |
| * Maps a type name to its package name. |
| */ |
| private static String packageName(String cn) { |
| int index = cn.lastIndexOf('.'); |
| return (index == -1) ? "" : cn.substring(0, index); |
| } |
| |
| /** |
| * Maps the name of an entry in a JAR or ZIP file to a package name. |
| * |
| * @throws InvalidModuleDescriptorException if the name is a class file in |
| * the top-level directory of the JAR/ZIP file (and it's not |
| * module-info.class) |
| */ |
| private Optional<String> toPackageName(String name) { |
| assert !name.endsWith("/"); |
| int index = name.lastIndexOf("/"); |
| if (index == -1) { |
| if (name.endsWith(".class") && !name.equals(MODULE_INFO)) { |
| String msg = name + " found in top-level directory" |
| + " (unnamed package not allowed in module)"; |
| throw new InvalidModuleDescriptorException(msg); |
| } |
| return Optional.empty(); |
| } |
| |
| String pn = name.substring(0, index).replace('/', '.'); |
| if (Checks.isPackageName(pn)) { |
| return Optional.of(pn); |
| } else { |
| // not a valid package name |
| return Optional.empty(); |
| } |
| } |
| |
| /** |
| * Maps the relative path of an entry in an exploded module to a package |
| * name. |
| * |
| * @throws InvalidModuleDescriptorException if the name is a class file in |
| * the top-level directory (and it's not module-info.class) |
| */ |
| private Optional<String> toPackageName(Path file) { |
| assert file.getRoot() == null; |
| |
| Path parent = file.getParent(); |
| if (parent == null) { |
| String name = file.toString(); |
| if (name.endsWith(".class") && !name.equals(MODULE_INFO)) { |
| String msg = name + " found in top-level directory" |
| + " (unnamed package not allowed in module)"; |
| throw new InvalidModuleDescriptorException(msg); |
| } |
| return Optional.empty(); |
| } |
| |
| String pn = parent.toString().replace(File.separatorChar, '.'); |
| if (Checks.isPackageName(pn)) { |
| return Optional.of(pn); |
| } else { |
| // not a valid package name |
| return Optional.empty(); |
| } |
| } |
| |
| /** |
| * Returns true if the given file exists and is a hidden file |
| */ |
| private boolean isHidden(Path file) { |
| try { |
| return Files.isHidden(file); |
| } catch (IOException ioe) { |
| return false; |
| } |
| } |
| |
| |
| /** |
| * Return true if a path locates a path in the default file system |
| */ |
| private boolean isDefaultFileSystem(Path path) { |
| return path.getFileSystem().provider() |
| .getScheme().equalsIgnoreCase("file"); |
| } |
| |
| |
| private static final PerfCounter scanTime |
| = PerfCounter.newPerfCounter("jdk.module.finder.modulepath.scanTime"); |
| private static final PerfCounter moduleCount |
| = PerfCounter.newPerfCounter("jdk.module.finder.modulepath.modules"); |
| } |