jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/nio/JavacPathFileManager.java@0ff2bbd38f10

7033660: Update copyright year to 2011 on any files changed in 2011
Reviewed-by: dholmes

     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;

    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.BasicFileAttributes;

    43 import java.util.ArrayList;

    44 import java.util.Arrays;

    45 import java.util.Collection;

    46 import java.util.Collections;

    47 import java.util.EnumSet;

    48 import java.util.HashMap;

    49 import java.util.Iterator;

    50 import java.util.LinkedHashSet;

    51 import java.util.Map;

    52 import java.util.Set;

    53 import javax.lang.model.SourceVersion;

    54 import javax.tools.FileObject;

    55 import javax.tools.JavaFileManager;

    56 import javax.tools.JavaFileObject;

    57 import javax.tools.JavaFileObject.Kind;

    58 import javax.tools.StandardLocation;

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

    61 import static javax.tools.StandardLocation.*;

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

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

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

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

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

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

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

    73 //

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

    75 //

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

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

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

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

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

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

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

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

    86 /**

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

    88  *  of java.nio.file.Path.

    89  *

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

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

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

    93  *  not ZipFileObject and its variants.)

    94  *

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

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

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

    98  *  call {@link #setLocation}.

    99  *

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

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

   102  *

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

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

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

   106  *  deletion without notice.</b>

   107  */

   108 public class JavacPathFileManager extends BaseFileManager implements PathFileManager {

   109     protected FileSystem defaultFileSystem;

   111     /**

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

   113      * it as the JavaFileManager for that context.

   114      */

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

   116         super(charset);

   117         if (register)

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

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

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

   121         setContext(context);

   122     }

   124     /**

   125      * Set the context for JavacPathFileManager.

   126      */

   127     @Override

   128     protected void setContext(Context context) {

   129         super.setContext(context);

   130         searchPaths = Paths.instance(context);

   131     }

   133     @Override

   134     public FileSystem getDefaultFileSystem() {

   135         if (defaultFileSystem == null)

   136             defaultFileSystem = FileSystems.getDefault();

   137         return defaultFileSystem;

   138     }

   140     @Override

   141     public void setDefaultFileSystem(FileSystem fs) {

   142         defaultFileSystem = fs;

   143     }

   145     @Override

   146     public void flush() throws IOException {

   147         contentCache.clear();

   148     }

   150     @Override

   151     public void close() throws IOException {

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

   153             fs.close();

   154     }

   156     @Override

   157     public ClassLoader getClassLoader(Location location) {

   158         nullCheck(location);

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

   160         if (path == null)

   161             return null;

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

   163         for (Path p: path) {

   164             try {

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

   166             } catch (MalformedURLException e) {

   167                 throw new AssertionError(e);

   168             }

   169         }

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

   172     }

   174     @Override

   175     public boolean isDefaultBootClassPath() {

   176         return searchPaths.isDefaultBootClassPath();

   177     }

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

   181     public boolean hasLocation(Location location) {

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

   183     }

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

   186         nullCheck(location);

   187         lazyInitSearchPaths();

   188         PathsForLocation path = pathsForLocation.get(location);

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

   190             setDefaultForLocation(location);

   191             path = pathsForLocation.get(location);

   192         }

   193         return path;

   194     }

   196     private Path getOutputLocation(Location location) {

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

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

   199     }

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

   202             throws IOException

   203     {

   204         nullCheck(location);

   205         lazyInitSearchPaths();

   206         if (searchPath == null) {

   207             setDefaultForLocation(location);

   208         } else {

   209             if (location.isOutputLocation())

   210                 checkOutputPath(searchPath);

   211             PathsForLocation pl = new PathsForLocation();

   212             for (Path p: searchPath)

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

   214             pathsForLocation.put(location, pl);

   215         }

   216     }

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

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

   220         if (!pathIter.hasNext())

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

   222         Path path = pathIter.next();

   223         if (pathIter.hasNext())

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

   225         if (!isDirectory(path))

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

   227     }

   229     private void setDefaultForLocation(Location locn) {

   230         Collection<File> files = null;

   231         if (locn instanceof StandardLocation) {

   232             switch ((StandardLocation) locn) {

   233                 case CLASS_PATH:

   234                     files = searchPaths.userClassPath();

   235                     break;

   236                 case PLATFORM_CLASS_PATH:

   237                     files = searchPaths.bootClassPath();

   238                     break;

   239                 case SOURCE_PATH:

   240                     files = searchPaths.sourcePath();

   241                     break;

   242                 case CLASS_OUTPUT: {

   243                     String arg = options.get(D);

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

   245                     break;

   246                 }

   247                 case SOURCE_OUTPUT: {

   248                     String arg = options.get(S);

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

   250                     break;

   251                 }

   252             }

   253         }

   255         PathsForLocation pl = new PathsForLocation();

   256         if (files != null) {

   257             for (File f: files)

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

   259         }

   260         pathsForLocation.put(locn, pl);

   261     }

   263     private void lazyInitSearchPaths() {

   264         if (!inited) {

   265             setDefaultForLocation(PLATFORM_CLASS_PATH);

   266             setDefaultForLocation(CLASS_PATH);

   267             setDefaultForLocation(SOURCE_PATH);

   268             inited = true;

   269         }

   270     }

   271     // where

   272         private boolean inited = false;

   274     private Map<Location, PathsForLocation> pathsForLocation;

   275     private Paths searchPaths;

   277     private static class PathsForLocation extends LinkedHashSet<Path> {

   278         private static final long serialVersionUID = 6788510222394486733L;

   279     }

   281     // </editor-fold>

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

   285     @Override

   286     public Path getPath(FileObject fo) {

   287         nullCheck(fo);

   288         if (!(fo instanceof PathFileObject))

   289             throw new IllegalArgumentException();

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

   291     }

   293     @Override

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

   295         nullCheck(a);

   296         nullCheck(b);

   297         if (!(a instanceof PathFileObject))

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

   299         if (!(b instanceof PathFileObject))

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

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

   302     }

   304     @Override

   305     public Iterable<JavaFileObject> list(Location location,

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

   307             throws IOException {

   308         // validatePackageName(packageName);

   309         nullCheck(packageName);

   310         nullCheck(kinds);

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

   313         if (paths == null)

   314             return List.nil();

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

   317         for (Path path : paths)

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

   320         return results.toList();

   321     }

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

   324             boolean recurse, final ListBuffer<JavaFileObject> results)

   325             throws IOException {

   326         if (!Files.exists(path))

   327             return;

   329         final Path pathDir;

   330         if (isDirectory(path))

   331             pathDir = path;

   332         else {

   333             FileSystem fs = getFileSystem(path);

   334             if (fs == null)

   335                 return;

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

   337         }

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

   339         Path packageDir = packageName.isEmpty() ? pathDir

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

   341         if (!Files.exists(packageDir))

   342             return;

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

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

   346 //        queue.add(packageDir);

   347 //

   348 //        Path dir;

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

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

   351 //            try {

   352 //                for (Path p: ds) {

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

   354 //                    if (isDirectory(p)) {

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

   356 //                            queue.add(p);

   357 //                        }

   358 //                    } else {

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

   360 //                            JavaFileObject fe =

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

   362 //                            results.append(fe);

   363 //                        }

   364 //                    }

   365 //                }

   366 //            } finally {

   367 //                ds.close();

   368 //            }

   369 //        }

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

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

   372         Files.walkFileTree(packageDir, opts, maxDepth,

   373                 new SimpleFileVisitor<Path>() {

   374             @Override

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

   376                 Path name = dir.getFileName();

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

   378                     return FileVisitResult.CONTINUE;

   379                 else

   380                     return FileVisitResult.SKIP_SUBTREE;

   381             }

   383             @Override

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

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

   386                     JavaFileObject fe =

   387                         PathFileObject.createDirectoryPathFileObject(

   388                             JavacPathFileManager.this, file, pathDir);

   389                     results.append(fe);

   390                 }

   391                 return FileVisitResult.CONTINUE;

   392             }

   393         });

   394     }

   396     @Override

   397     public Iterable<? extends JavaFileObject> getJavaFileObjectsFromPaths(

   398         Iterable<? extends Path> paths) {

   399         ArrayList<PathFileObject> result;

   400         if (paths instanceof Collection<?>)

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

   402         else

   403             result = new ArrayList<PathFileObject>();

   404         for (Path p: paths)

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

   406         return result;

   407     }

   409     @Override

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

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

   412     }

   414     @Override

   415     public JavaFileObject getJavaFileForInput(Location location,

   416             String className, Kind kind) throws IOException {

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

   418     }

   420     @Override

   421     public FileObject getFileForInput(Location location,

   422             String packageName, String relativeName) throws IOException {

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

   424     }

   426     private JavaFileObject getFileForInput(Location location, String relativePath)

   427             throws IOException {

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

   429             if (isDirectory(p)) {

   430                 Path f = resolve(p, relativePath);

   431                 if (Files.exists(f))

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

   433             } else {

   434                 FileSystem fs = getFileSystem(p);

   435                 if (fs != null) {

   436                     Path file = getPath(fs, relativePath);

   437                     if (Files.exists(file))

   438                         return PathFileObject.createJarPathFileObject(this, file);

   439                 }

   440             }

   441         }

   442         return null;

   443     }

   445     @Override

   446     public JavaFileObject getJavaFileForOutput(Location location,

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

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

   449     }

   451     @Override

   452     public FileObject getFileForOutput(Location location, String packageName,

   453             String relativeName, FileObject sibling)

   454             throws IOException {

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

   456     }

   458     private JavaFileObject getFileForOutput(Location location,

   459             String relativePath, FileObject sibling) {

   460         Path dir = getOutputLocation(location);

   461         if (dir == null) {

   462             if (location == CLASS_OUTPUT) {

   463                 Path siblingDir = null;

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

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

   466                 }

   467                 return PathFileObject.createSiblingPathFileObject(this,

   468                         siblingDir.resolve(getBaseName(relativePath)),

   469                         relativePath);

   470             } else if (location == SOURCE_OUTPUT) {

   471                 dir = getOutputLocation(CLASS_OUTPUT);

   472             }

   473         }

   475         Path file;

   476         if (dir != null) {

   477             file = resolve(dir, relativePath);

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

   479         } else {

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

   481             return PathFileObject.createSimplePathFileObject(this, file);

   482         }

   484     }

   486     @Override

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

   488         nullCheck(fo);

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

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

   491         if (paths == null) {

   492             return null;

   493         }

   495         if (!(fo instanceof PathFileObject))

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

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

   499     }

   501     private FileSystem getFileSystem(Path p) throws IOException {

   502         FileSystem fs = fileSystems.get(p);

   503         if (fs == null) {

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

   505             fileSystems.put(p, fs);

   506         }

   507         return fs;

   508     }

   510     private Map<Path,FileSystem> fileSystems;

   512     // </editor-fold>

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

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

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

   518     }

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

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

   522     }

   524     private static String getBaseName(String relativePath) {

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

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

   527     }

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

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

   531         return attrs.isDirectory();

   532     }

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

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

   536     }

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

   539         FileSystem fs = base.getFileSystem();

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

   541         return base.resolve(rp);

   542     }

   544     // </editor-fold>

   546 }

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

src/share/classes/com/sun/tools/javac/nio/JavacPathFileManager.java@0ff2bbd38f10

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