jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/nio/JavacPathFileManager.java@d830d28fc72e

     1 /*

     2  * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.tools.javac.nio;

    28 import java.io.File;

    29 import java.io.IOException;

    30 import java.net.MalformedURLException;

    31 import java.net.URL;

    32 import java.nio.charset.Charset;

    33 import java.nio.file.Files;

    34 import java.nio.file.FileSystem;

    35 import java.nio.file.FileSystems;

    36 import java.nio.file.FileVisitOption;

    37 import java.nio.file.FileVisitResult;

    38 import java.nio.file.Path;

    39 import java.nio.file.SimpleFileVisitor;

    40 import java.nio.file.attribute.BasicFileAttributes;

    41 import java.util.ArrayList;

    42 import java.util.Arrays;

    43 import java.util.Collection;

    44 import java.util.Collections;

    45 import java.util.EnumSet;

    46 import java.util.HashMap;

    47 import java.util.Iterator;

    48 import java.util.LinkedHashSet;

    49 import java.util.Map;

    50 import java.util.Set;

    51 import javax.lang.model.SourceVersion;

    52 import javax.tools.FileObject;

    53 import javax.tools.JavaFileManager;

    54 import javax.tools.JavaFileObject;

    55 import javax.tools.JavaFileObject.Kind;

    56 import javax.tools.StandardLocation;

    58 import static java.nio.file.FileVisitOption.*;

    59 import static javax.tools.StandardLocation.*;

    61 import com.sun.tools.javac.util.BaseFileManager;

    62 import com.sun.tools.javac.util.Context;

    63 import com.sun.tools.javac.util.List;

    64 import com.sun.tools.javac.util.ListBuffer;

    66 import static com.sun.tools.javac.main.OptionName.*;

    69 // NOTE the imports carefully for this compilation unit.

    70 //

    71 // Path:  java.nio.file.Path -- the new NIO type for which this file manager exists

    72 //

    73 // Paths: com.sun.tools.javac.file.Paths -- legacy javac type for handling path options

    74 //      The other Paths (java.nio.file.Paths) is not used

    76 // NOTE this and related classes depend on new API in JDK 7.

    77 // This requires special handling while bootstrapping the JDK build,

    78 // when these classes might not yet have been compiled. To workaround

    79 // this, the build arranges to make stubs of these classes available

    80 // when compiling this and related classes. The set of stub files

    81 // is specified in make/build.properties.

    83 /**

    84  *  Implementation of PathFileManager: a JavaFileManager based on the use

    85  *  of java.nio.file.Path.

    86  *

    87  *  <p>Just as a Path is somewhat analagous to a File, so too is this

    88  *  JavacPathFileManager analogous to JavacFileManager, as it relates to the

    89  *  support of FileObjects based on File objects (i.e. just RegularFileObject,

    90  *  not ZipFileObject and its variants.)

    91  *

    92  *  <p>The default values for the standard locations supported by this file

    93  *  manager are the same as the default values provided by JavacFileManager --

    94  *  i.e. as determined by the javac.file.Paths class. To override these values,

    95  *  call {@link #setLocation}.

    96  *

    97  *  <p>To reduce confusion with Path objects, the locations such as "class path",

    98  *  "source path", etc, are generically referred to here as "search paths".

    99  *

   100  *  <p><b>This is NOT part of any supported API.

   101  *  If you write code that depends on this, you do so at your own risk.

   102  *  This code and its internal interfaces are subject to change or

   103  *  deletion without notice.</b>

   104  */

   105 public class JavacPathFileManager extends BaseFileManager implements PathFileManager {

   106     protected FileSystem defaultFileSystem;

   108     /**

   109      * Create a JavacPathFileManager using a given context, optionally registering

   110      * it as the JavaFileManager for that context.

   111      */

   112     public JavacPathFileManager(Context context, boolean register, Charset charset) {

   113         super(charset);

   114         if (register)

   115             context.put(JavaFileManager.class, this);

   116         pathsForLocation = new HashMap<Location, PathsForLocation>();

   117         fileSystems = new HashMap<Path,FileSystem>();

   118         setContext(context);

   119     }

   121     /**

   122      * Set the context for JavacPathFileManager.

   123      */

   124     @Override

   125     public void setContext(Context context) {

   126         super.setContext(context);

   127     }

   129     @Override

   130     public FileSystem getDefaultFileSystem() {

   131         if (defaultFileSystem == null)

   132             defaultFileSystem = FileSystems.getDefault();

   133         return defaultFileSystem;

   134     }

   136     @Override

   137     public void setDefaultFileSystem(FileSystem fs) {

   138         defaultFileSystem = fs;

   139     }

   141     @Override

   142     public void flush() throws IOException {

   143         contentCache.clear();

   144     }

   146     @Override

   147     public void close() throws IOException {

   148         for (FileSystem fs: fileSystems.values())

   149             fs.close();

   150     }

   152     @Override

   153     public ClassLoader getClassLoader(Location location) {

   154         nullCheck(location);

   155         Iterable<? extends Path> path = getLocation(location);

   156         if (path == null)

   157             return null;

   158         ListBuffer<URL> lb = new ListBuffer<URL>();

   159         for (Path p: path) {

   160             try {

   161                 lb.append(p.toUri().toURL());

   162             } catch (MalformedURLException e) {

   163                 throw new AssertionError(e);

   164             }

   165         }

   167         return getClassLoader(lb.toArray(new URL[lb.size()]));

   168     }

   170     @Override

   171     public boolean isDefaultBootClassPath() {

   172         return locations.isDefaultBootClassPath();

   173     }

   175     // <editor-fold defaultstate="collapsed" desc="Location handling">

   177     public boolean hasLocation(Location location) {

   178         return (getLocation(location) != null);

   179     }

   181     public Iterable<? extends Path> getLocation(Location location) {

   182         nullCheck(location);

   183         lazyInitSearchPaths();

   184         PathsForLocation path = pathsForLocation.get(location);

   185         if (path == null && !pathsForLocation.containsKey(location)) {

   186             setDefaultForLocation(location);

   187             path = pathsForLocation.get(location);

   188         }

   189         return path;

   190     }

   192     private Path getOutputLocation(Location location) {

   193         Iterable<? extends Path> paths = getLocation(location);

   194         return (paths == null ? null : paths.iterator().next());

   195     }

   197     public void setLocation(Location location, Iterable<? extends Path> searchPath)

   198             throws IOException

   199     {

   200         nullCheck(location);

   201         lazyInitSearchPaths();

   202         if (searchPath == null) {

   203             setDefaultForLocation(location);

   204         } else {

   205             if (location.isOutputLocation())

   206                 checkOutputPath(searchPath);

   207             PathsForLocation pl = new PathsForLocation();

   208             for (Path p: searchPath)

   209                 pl.add(p);  // TODO -Xlint:path warn if path not found

   210             pathsForLocation.put(location, pl);

   211         }

   212     }

   214     private void checkOutputPath(Iterable<? extends Path> searchPath) throws IOException {

   215         Iterator<? extends Path> pathIter = searchPath.iterator();

   216         if (!pathIter.hasNext())

   217             throw new IllegalArgumentException("empty path for directory");

   218         Path path = pathIter.next();

   219         if (pathIter.hasNext())

   220             throw new IllegalArgumentException("path too long for directory");

   221         if (!isDirectory(path))

   222             throw new IOException(path + ": not a directory");

   223     }

   225     private void setDefaultForLocation(Location locn) {

   226         Collection<File> files = null;

   227         if (locn instanceof StandardLocation) {

   228             switch ((StandardLocation) locn) {

   229                 case CLASS_PATH:

   230                     files = locations.userClassPath();

   231                     break;

   232                 case PLATFORM_CLASS_PATH:

   233                     files = locations.bootClassPath();

   234                     break;

   235                 case SOURCE_PATH:

   236                     files = locations.sourcePath();

   237                     break;

   238                 case CLASS_OUTPUT: {

   239                     String arg = options.get(D);

   240                     files = (arg == null ? null : Collections.singleton(new File(arg)));

   241                     break;

   242                 }

   243                 case SOURCE_OUTPUT: {

   244                     String arg = options.get(S);

   245                     files = (arg == null ? null : Collections.singleton(new File(arg)));

   246                     break;

   247                 }

   248             }

   249         }

   251         PathsForLocation pl = new PathsForLocation();

   252         if (files != null) {

   253             for (File f: files)

   254                 pl.add(f.toPath());

   255         }

   256         pathsForLocation.put(locn, pl);

   257     }

   259     private void lazyInitSearchPaths() {

   260         if (!inited) {

   261             setDefaultForLocation(PLATFORM_CLASS_PATH);

   262             setDefaultForLocation(CLASS_PATH);

   263             setDefaultForLocation(SOURCE_PATH);

   264             inited = true;

   265         }

   266     }

   267     // where

   268         private boolean inited = false;

   270     private Map<Location, PathsForLocation> pathsForLocation;

   272     private static class PathsForLocation extends LinkedHashSet<Path> {

   273         private static final long serialVersionUID = 6788510222394486733L;

   274     }

   276     // </editor-fold>

   278     // <editor-fold defaultstate="collapsed" desc="FileObject handling">

   280     @Override

   281     public Path getPath(FileObject fo) {

   282         nullCheck(fo);

   283         if (!(fo instanceof PathFileObject))

   284             throw new IllegalArgumentException();

   285         return ((PathFileObject) fo).getPath();

   286     }

   288     @Override

   289     public boolean isSameFile(FileObject a, FileObject b) {

   290         nullCheck(a);

   291         nullCheck(b);

   292         if (!(a instanceof PathFileObject))

   293             throw new IllegalArgumentException("Not supported: " + a);

   294         if (!(b instanceof PathFileObject))

   295             throw new IllegalArgumentException("Not supported: " + b);

   296         return ((PathFileObject) a).isSameFile((PathFileObject) b);

   297     }

   299     @Override

   300     public Iterable<JavaFileObject> list(Location location,

   301             String packageName, Set<Kind> kinds, boolean recurse)

   302             throws IOException {

   303         // validatePackageName(packageName);

   304         nullCheck(packageName);

   305         nullCheck(kinds);

   307         Iterable<? extends Path> paths = getLocation(location);

   308         if (paths == null)

   309             return List.nil();

   310         ListBuffer<JavaFileObject> results = new ListBuffer<JavaFileObject>();

   312         for (Path path : paths)

   313             list(path, packageName, kinds, recurse, results);

   315         return results.toList();

   316     }

   318     private void list(Path path, String packageName, final Set<Kind> kinds,

   319             boolean recurse, final ListBuffer<JavaFileObject> results)

   320             throws IOException {

   321         if (!Files.exists(path))

   322             return;

   324         final Path pathDir;

   325         if (isDirectory(path))

   326             pathDir = path;

   327         else {

   328             FileSystem fs = getFileSystem(path);

   329             if (fs == null)

   330                 return;

   331             pathDir = fs.getRootDirectories().iterator().next();

   332         }

   333         String sep = path.getFileSystem().getSeparator();

   334         Path packageDir = packageName.isEmpty() ? pathDir

   335                 : pathDir.resolve(packageName.replace(".", sep));

   336         if (!Files.exists(packageDir))

   337             return;

   339 /* Alternate impl of list, superceded by use of Files.walkFileTree */

   340 //        Deque<Path> queue = new LinkedList<Path>();

   341 //        queue.add(packageDir);

   342 //

   343 //        Path dir;

   344 //        while ((dir = queue.poll()) != null) {

   345 //            DirectoryStream<Path> ds = dir.newDirectoryStream();

   346 //            try {

   347 //                for (Path p: ds) {

   348 //                    String name = p.getFileName().toString();

   349 //                    if (isDirectory(p)) {

   350 //                        if (recurse && SourceVersion.isIdentifier(name)) {

   351 //                            queue.add(p);

   352 //                        }

   353 //                    } else {

   354 //                        if (kinds.contains(getKind(name))) {

   355 //                            JavaFileObject fe =

   356 //                                PathFileObject.createDirectoryPathFileObject(this, p, pathDir);

   357 //                            results.append(fe);

   358 //                        }

   359 //                    }

   360 //                }

   361 //            } finally {

   362 //                ds.close();

   363 //            }

   364 //        }

   365         int maxDepth = (recurse ? Integer.MAX_VALUE : 1);

   366         Set<FileVisitOption> opts = EnumSet.of(FOLLOW_LINKS);

   367         Files.walkFileTree(packageDir, opts, maxDepth,

   368                 new SimpleFileVisitor<Path>() {

   369             @Override

   370             public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) {

   371                 Path name = dir.getFileName();

   372                 if (name == null || SourceVersion.isIdentifier(name.toString())) // JSR 292?

   373                     return FileVisitResult.CONTINUE;

   374                 else

   375                     return FileVisitResult.SKIP_SUBTREE;

   376             }

   378             @Override

   379             public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {

   380                 if (attrs.isRegularFile() && kinds.contains(getKind(file.getFileName().toString()))) {

   381                     JavaFileObject fe =

   382                         PathFileObject.createDirectoryPathFileObject(

   383                             JavacPathFileManager.this, file, pathDir);

   384                     results.append(fe);

   385                 }

   386                 return FileVisitResult.CONTINUE;

   387             }

   388         });

   389     }

   391     @Override

   392     public Iterable<? extends JavaFileObject> getJavaFileObjectsFromPaths(

   393         Iterable<? extends Path> paths) {

   394         ArrayList<PathFileObject> result;

   395         if (paths instanceof Collection<?>)

   396             result = new ArrayList<PathFileObject>(((Collection<?>)paths).size());

   397         else

   398             result = new ArrayList<PathFileObject>();

   399         for (Path p: paths)

   400             result.add(PathFileObject.createSimplePathFileObject(this, nullCheck(p)));

   401         return result;

   402     }

   404     @Override

   405     public Iterable<? extends JavaFileObject> getJavaFileObjects(Path... paths) {

   406         return getJavaFileObjectsFromPaths(Arrays.asList(nullCheck(paths)));

   407     }

   409     @Override

   410     public JavaFileObject getJavaFileForInput(Location location,

   411             String className, Kind kind) throws IOException {

   412         return getFileForInput(location, getRelativePath(className, kind));

   413     }

   415     @Override

   416     public FileObject getFileForInput(Location location,

   417             String packageName, String relativeName) throws IOException {

   418         return getFileForInput(location, getRelativePath(packageName, relativeName));

   419     }

   421     private JavaFileObject getFileForInput(Location location, String relativePath)

   422             throws IOException {

   423         for (Path p: getLocation(location)) {

   424             if (isDirectory(p)) {

   425                 Path f = resolve(p, relativePath);

   426                 if (Files.exists(f))

   427                     return PathFileObject.createDirectoryPathFileObject(this, f, p);

   428             } else {

   429                 FileSystem fs = getFileSystem(p);

   430                 if (fs != null) {

   431                     Path file = getPath(fs, relativePath);

   432                     if (Files.exists(file))

   433                         return PathFileObject.createJarPathFileObject(this, file);

   434                 }

   435             }

   436         }

   437         return null;

   438     }

   440     @Override

   441     public JavaFileObject getJavaFileForOutput(Location location,

   442             String className, Kind kind, FileObject sibling) throws IOException {

   443         return getFileForOutput(location, getRelativePath(className, kind), sibling);

   444     }

   446     @Override

   447     public FileObject getFileForOutput(Location location, String packageName,

   448             String relativeName, FileObject sibling)

   449             throws IOException {

   450         return getFileForOutput(location, getRelativePath(packageName, relativeName), sibling);

   451     }

   453     private JavaFileObject getFileForOutput(Location location,

   454             String relativePath, FileObject sibling) {

   455         Path dir = getOutputLocation(location);

   456         if (dir == null) {

   457             if (location == CLASS_OUTPUT) {

   458                 Path siblingDir = null;

   459                 if (sibling != null && sibling instanceof PathFileObject) {

   460                     siblingDir = ((PathFileObject) sibling).getPath().getParent();

   461                 }

   462                 return PathFileObject.createSiblingPathFileObject(this,

   463                         siblingDir.resolve(getBaseName(relativePath)),

   464                         relativePath);

   465             } else if (location == SOURCE_OUTPUT) {

   466                 dir = getOutputLocation(CLASS_OUTPUT);

   467             }

   468         }

   470         Path file;

   471         if (dir != null) {

   472             file = resolve(dir, relativePath);

   473             return PathFileObject.createDirectoryPathFileObject(this, file, dir);

   474         } else {

   475             file = getPath(getDefaultFileSystem(), relativePath);

   476             return PathFileObject.createSimplePathFileObject(this, file);

   477         }

   479     }

   481     @Override

   482     public String inferBinaryName(Location location, JavaFileObject fo) {

   483         nullCheck(fo);

   484         // Need to match the path semantics of list(location, ...)

   485         Iterable<? extends Path> paths = getLocation(location);

   486         if (paths == null) {

   487             return null;

   488         }

   490         if (!(fo instanceof PathFileObject))

   491             throw new IllegalArgumentException(fo.getClass().getName());

   493         return ((PathFileObject) fo).inferBinaryName(paths);

   494     }

   496     private FileSystem getFileSystem(Path p) throws IOException {

   497         FileSystem fs = fileSystems.get(p);

   498         if (fs == null) {

   499             fs = FileSystems.newFileSystem(p, null);

   500             fileSystems.put(p, fs);

   501         }

   502         return fs;

   503     }

   505     private Map<Path,FileSystem> fileSystems;

   507     // </editor-fold>

   509     // <editor-fold defaultstate="collapsed" desc="Utility methods">

   511     private static String getRelativePath(String className, Kind kind) {

   512         return className.replace(".", "/") + kind.extension;

   513     }

   515     private static String getRelativePath(String packageName, String relativeName) {

   516         return packageName.replace(".", "/") + relativeName;

   517     }

   519     private static String getBaseName(String relativePath) {

   520         int lastSep = relativePath.lastIndexOf("/");

   521         return relativePath.substring(lastSep + 1); // safe if "/" not found

   522     }

   524     private static boolean isDirectory(Path path) throws IOException {

   525         BasicFileAttributes attrs = Files.readAttributes(path, BasicFileAttributes.class);

   526         return attrs.isDirectory();

   527     }

   529     private static Path getPath(FileSystem fs, String relativePath) {

   530         return fs.getPath(relativePath.replace("/", fs.getSeparator()));

   531     }

   533     private static Path resolve(Path base, String relativePath) {

   534         FileSystem fs = base.getFileSystem();

   535         Path rp = fs.getPath(relativePath.replace("/", fs.getSeparator()));

   536         return base.resolve(rp);

   537     }

   539     // </editor-fold>

   541 }

Mercurial > jdk8-mips64-public > langtools / file revision

src/share/classes/com/sun/tools/javac/nio/JavacPathFileManager.java@d830d28fc72e

src/share/classes/com/sun/tools/javac/nio/JavacPathFileManager.java