jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/nio/JavacPathFileManager.java@e63b1f8341ce

     1 /*

     2  * Copyright (c) 2009, 2010, 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;

    29 import java.io.File;

    30 import java.io.FileNotFoundException;

    31 import java.io.IOException;

    32 import java.net.MalformedURLException;

    33 import java.net.URL;

    34 import java.nio.charset.Charset;

    35 import java.nio.file.Files;

    36 import java.nio.file.FileSystem;

    37 import java.nio.file.FileSystems;

    38 import java.nio.file.FileVisitOption;

    39 import java.nio.file.FileVisitResult;

    40 import java.nio.file.Path;

    41 import java.nio.file.SimpleFileVisitor;

    42 import java.nio.file.attribute.Attributes;

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

    44 import java.util.ArrayList;

    45 import java.util.Arrays;

    46 import java.util.Collection;

    47 import java.util.Collections;

    48 import java.util.EnumSet;

    49 import java.util.HashMap;

    50 import java.util.Iterator;

    51 import java.util.LinkedHashSet;

    52 import java.util.Map;

    53 import java.util.Set;

    54 import javax.lang.model.SourceVersion;

    55 import javax.tools.FileObject;

    56 import javax.tools.JavaFileManager;

    57 import javax.tools.JavaFileObject;

    58 import javax.tools.JavaFileObject.Kind;

    59 import javax.tools.StandardLocation;

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

    62 import static javax.tools.StandardLocation.*;

    64 import com.sun.tools.javac.file.Paths;

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

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

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

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

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

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

    74 //

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

    76 //

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

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

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

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

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

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

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

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

    87 /**

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

    89  *  of java.nio.file.Path.

    90  *

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

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

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

    94  *  not ZipFileObject and its variants.)

    95  *

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

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

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

    99  *  call {@link #setLocation}.

   100  *

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

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

   103  *

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

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

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

   107  *  deletion without notice.</b>

   108  */

   109 public class JavacPathFileManager extends BaseFileManager implements PathFileManager {

   110     protected FileSystem defaultFileSystem;

   112     /**

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

   114      * it as the JavaFileManager for that context.

   115      */

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

   117         super(charset);

   118         if (register)

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

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

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

   122         setContext(context);

   123     }

   125     /**

   126      * Set the context for JavacPathFileManager.

   127      */

   128     @Override

   129     protected void setContext(Context context) {

   130         super.setContext(context);

   131         searchPaths = Paths.instance(context);

   132     }

   134     @Override

   135     public FileSystem getDefaultFileSystem() {

   136         if (defaultFileSystem == null)

   137             defaultFileSystem = FileSystems.getDefault();

   138         return defaultFileSystem;

   139     }

   141     @Override

   142     public void setDefaultFileSystem(FileSystem fs) {

   143         defaultFileSystem = fs;

   144     }

   146     @Override

   147     public void flush() throws IOException {

   148         contentCache.clear();

   149     }

   151     @Override

   152     public void close() throws IOException {

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

   154             fs.close();

   155     }

   157     @Override

   158     public ClassLoader getClassLoader(Location location) {

   159         nullCheck(location);

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

   161         if (path == null)

   162             return null;

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

   164         for (Path p: path) {

   165             try {

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

   167             } catch (MalformedURLException e) {

   168                 throw new AssertionError(e);

   169             }

   170         }

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

   173     }

   175     @Override

   176     public boolean isDefaultBootClassPath() {

   177         return searchPaths.isDefaultBootClassPath();

   178     }

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

   182     public boolean hasLocation(Location location) {

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

   184     }

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

   187         nullCheck(location);

   188         lazyInitSearchPaths();

   189         PathsForLocation path = pathsForLocation.get(location);

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

   191             setDefaultForLocation(location);

   192             path = pathsForLocation.get(location);

   193         }

   194         return path;

   195     }

   197     private Path getOutputLocation(Location location) {

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

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

   200     }

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

   203             throws IOException

   204     {

   205         nullCheck(location);

   206         lazyInitSearchPaths();

   207         if (searchPath == null) {

   208             setDefaultForLocation(location);

   209         } else {

   210             if (location.isOutputLocation())

   211                 checkOutputPath(searchPath);

   212             PathsForLocation pl = new PathsForLocation();

   213             for (Path p: searchPath)

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

   215             pathsForLocation.put(location, pl);

   216         }

   217     }

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

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

   221         if (!pathIter.hasNext())

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

   223         Path path = pathIter.next();

   224         if (pathIter.hasNext())

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

   226         if (!path.exists())

   227             throw new FileNotFoundException(path + ": does not exist");

   228         else if (!isDirectory(path))

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

   230     }

   232     private void setDefaultForLocation(Location locn) {

   233         Collection<File> files = null;

   234         if (locn instanceof StandardLocation) {

   235             switch ((StandardLocation) locn) {

   236                 case CLASS_PATH:

   237                     files = searchPaths.userClassPath();

   238                     break;

   239                 case PLATFORM_CLASS_PATH:

   240                     files = searchPaths.bootClassPath();

   241                     break;

   242                 case SOURCE_PATH:

   243                     files = searchPaths.sourcePath();

   244                     break;

   245                 case CLASS_OUTPUT: {

   246                     String arg = options.get(D);

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

   248                     break;

   249                 }

   250                 case SOURCE_OUTPUT: {

   251                     String arg = options.get(S);

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

   253                     break;

   254                 }

   255             }

   256         }

   258         PathsForLocation pl = new PathsForLocation();

   259         if (files != null) {

   260             for (File f: files)

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

   262         }

   263         pathsForLocation.put(locn, pl);

   264     }

   266     private void lazyInitSearchPaths() {

   267         if (!inited) {

   268             setDefaultForLocation(PLATFORM_CLASS_PATH);

   269             setDefaultForLocation(CLASS_PATH);

   270             setDefaultForLocation(SOURCE_PATH);

   271             inited = true;

   272         }

   273     }

   274     // where

   275         private boolean inited = false;

   277     private Map<Location, PathsForLocation> pathsForLocation;

   278     private Paths searchPaths;

   280     private static class PathsForLocation extends LinkedHashSet<Path> {

   281         private static final long serialVersionUID = 6788510222394486733L;

   282     }

   284     // </editor-fold>

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

   288     @Override

   289     public Path getPath(FileObject fo) {

   290         nullCheck(fo);

   291         if (!(fo instanceof PathFileObject))

   292             throw new IllegalArgumentException();

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

   294     }

   296     @Override

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

   298         nullCheck(a);

   299         nullCheck(b);

   300         if (!(a instanceof PathFileObject))

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

   302         if (!(b instanceof PathFileObject))

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

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

   305     }

   307     @Override

   308     public Iterable<JavaFileObject> list(Location location,

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

   310             throws IOException {

   311         // validatePackageName(packageName);

   312         nullCheck(packageName);

   313         nullCheck(kinds);

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

   316         if (paths == null)

   317             return List.nil();

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

   320         for (Path path : paths)

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

   323         return results.toList();

   324     }

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

   327             boolean recurse, final ListBuffer<JavaFileObject> results)

   328             throws IOException {

   329         if (!path.exists())

   330             return;

   332         final Path pathDir;

   333         if (isDirectory(path))

   334             pathDir = path;

   335         else {

   336             FileSystem fs = getFileSystem(path);

   337             if (fs == null)

   338                 return;

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

   340         }

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

   342         Path packageDir = packageName.isEmpty() ? pathDir

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

   344         if (!packageDir.exists())

   345             return;

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

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

   349 //        queue.add(packageDir);

   350 //

   351 //        Path dir;

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

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

   354 //            try {

   355 //                for (Path p: ds) {

   356 //                    String name = p.getName().toString();

   357 //                    if (isDirectory(p)) {

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

   359 //                            queue.add(p);

   360 //                        }

   361 //                    } else {

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

   363 //                            JavaFileObject fe =

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

   365 //                            results.append(fe);

   366 //                        }

   367 //                    }

   368 //                }

   369 //            } finally {

   370 //                ds.close();

   371 //            }

   372 //        }

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

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

   375         Files.walkFileTree(packageDir, opts, maxDepth,

   376                 new SimpleFileVisitor<Path>() {

   377             @Override

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

   379                 Path name = dir.getName();

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

   381                     return FileVisitResult.CONTINUE;

   382                 else

   383                     return FileVisitResult.SKIP_SUBTREE;

   384             }

   386             @Override

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

   388                 if (attrs.isRegularFile() && kinds.contains(getKind(file.getName().toString()))) {

   389                     JavaFileObject fe =

   390                         PathFileObject.createDirectoryPathFileObject(

   391                             JavacPathFileManager.this, file, pathDir);

   392                     results.append(fe);

   393                 }

   394                 return FileVisitResult.CONTINUE;

   395             }

   396         });

   397     }

   399     @Override

   400     public Iterable<? extends JavaFileObject> getJavaFileObjectsFromPaths(

   401         Iterable<? extends Path> paths) {

   402         ArrayList<PathFileObject> result;

   403         if (paths instanceof Collection<?>)

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

   405         else

   406             result = new ArrayList<PathFileObject>();

   407         for (Path p: paths)

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

   409         return result;

   410     }

   412     @Override

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

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

   415     }

   417     @Override

   418     public JavaFileObject getJavaFileForInput(Location location,

   419             String className, Kind kind) throws IOException {

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

   421     }

   423     @Override

   424     public FileObject getFileForInput(Location location,

   425             String packageName, String relativeName) throws IOException {

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

   427     }

   429     private JavaFileObject getFileForInput(Location location, String relativePath)

   430             throws IOException {

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

   432             if (isDirectory(p)) {

   433                 Path f = resolve(p, relativePath);

   434                 if (f.exists())

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

   436             } else {

   437                 FileSystem fs = getFileSystem(p);

   438                 if (fs != null) {

   439                     Path file = getPath(fs, relativePath);

   440                     if (file.exists())

   441                         return PathFileObject.createJarPathFileObject(this, file);

   442                 }

   443             }

   444         }

   445         return null;

   446     }

   448     @Override

   449     public JavaFileObject getJavaFileForOutput(Location location,

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

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

   452     }

   454     @Override

   455     public FileObject getFileForOutput(Location location, String packageName,

   456             String relativeName, FileObject sibling)

   457             throws IOException {

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

   459     }

   461     private JavaFileObject getFileForOutput(Location location,

   462             String relativePath, FileObject sibling) {

   463         Path dir = getOutputLocation(location);

   464         if (dir == null) {

   465             if (location == CLASS_OUTPUT) {

   466                 Path siblingDir = null;

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

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

   469                 }

   470                 return PathFileObject.createSiblingPathFileObject(this,

   471                         siblingDir.resolve(getBaseName(relativePath)),

   472                         relativePath);

   473             } else if (location == SOURCE_OUTPUT) {

   474                 dir = getOutputLocation(CLASS_OUTPUT);

   475             }

   476         }

   478         Path file;

   479         if (dir != null) {

   480             file = resolve(dir, relativePath);

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

   482         } else {

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

   484             return PathFileObject.createSimplePathFileObject(this, file);

   485         }

   487     }

   489     @Override

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

   491         nullCheck(fo);

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

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

   494         if (paths == null) {

   495             return null;

   496         }

   498         if (!(fo instanceof PathFileObject))

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

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

   502     }

   504     private FileSystem getFileSystem(Path p) throws IOException {

   505         FileSystem fs = fileSystems.get(p);

   506         if (fs == null) {

   507             fs = FileSystems.newFileSystem(p, Collections.<String,Void>emptyMap(), null);

   508             fileSystems.put(p, fs);

   509         }

   510         return fs;

   511     }

   513     private Map<Path,FileSystem> fileSystems;

   515     // </editor-fold>

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

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

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

   521     }

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

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

   525     }

   527     private static String getBaseName(String relativePath) {

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

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

   530     }

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

   533         BasicFileAttributes attrs = Attributes.readBasicFileAttributes(path);

   534         return attrs.isDirectory();

   535     }

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

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

   539     }

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

   542         FileSystem fs = base.getFileSystem();

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

   544         return base.resolve(rp);

   545     }

   547     // </editor-fold>

   549 }

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

src/share/classes/com/sun/tools/javac/nio/JavacPathFileManager.java@e63b1f8341ce

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