jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/file/JavacFileManager.java@6970d9fb8e02 (annotated)

src/share/classes/com/sun/tools/javac/file/JavacFileManager.java@6970d9fb8e02 (annotated)

src/share/classes/com/sun/tools/javac/file/JavacFileManager.java

Mon, 07 Mar 2011 17:39:42 -0800

author: ksrini
date: Mon, 07 Mar 2011 17:39:42 -0800
changeset 923: 6970d9fb8e02
parent 893: 8f0dcb9499db
child 1111: d2cbb77469ed
permissions: -rw-r--r--

7021927: javac: regression in performance
Reviewed-by: jjg

 /*
  * Copyright (c) 2005, 2011, 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 com.sun.tools.javac.file;
 import java.util.Comparator;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
 import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.nio.CharBuffer;
 import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.EnumSet;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Set;
 import java.util.zip.ZipFile;
 import javax.lang.model.SourceVersion;
 import javax.tools.FileObject;
 import javax.tools.JavaFileManager;
 import javax.tools.JavaFileObject;
 import javax.tools.StandardJavaFileManager;
 import com.sun.tools.javac.file.RelativePath.RelativeFile;
 import com.sun.tools.javac.file.RelativePath.RelativeDirectory;
 import com.sun.tools.javac.main.OptionName;
 import com.sun.tools.javac.util.BaseFileManager;
 import com.sun.tools.javac.util.Context;
 import com.sun.tools.javac.util.List;
 import com.sun.tools.javac.util.ListBuffer;
 import static javax.tools.StandardLocation.*;
 import static com.sun.tools.javac.main.OptionName.*;
 /**
  * This class provides access to the source, class and other files
  * used by the compiler and related tools.
  *
  * <p><b>This is NOT part of any supported API.
  * If you write code that depends on this, you do so at your own risk.
  * This code and its internal interfaces are subject to change or
  * deletion without notice.</b>
  */
 public class JavacFileManager extends BaseFileManager implements StandardJavaFileManager {
     public static char[] toArray(CharBuffer buffer) {
         if (buffer.hasArray())
             return ((CharBuffer)buffer.compact().flip()).array();
         else
             return buffer.toString().toCharArray();
     }
     /** Encapsulates knowledge of paths
      */
     private Paths paths;
     private FSInfo fsInfo;
     private boolean contextUseOptimizedZip;
     private ZipFileIndexCache zipFileIndexCache;
     private final File uninited = new File("U N I N I T E D");
     private final Set<JavaFileObject.Kind> sourceOrClass =
         EnumSet.of(JavaFileObject.Kind.SOURCE, JavaFileObject.Kind.CLASS);
     /** The standard output directory, primarily used for classes.
      *  Initialized by the "-d" option.
      *  If classOutDir = null, files are written into same directory as the sources
      *  they were generated from.
      */
     private File classOutDir = uninited;
     /** The output directory, used when generating sources while processing annotations.
      *  Initialized by the "-s" option.
      */
     private File sourceOutDir = uninited;
     protected boolean mmappedIO;
     protected boolean ignoreSymbolFile;
     protected enum SortFiles implements Comparator<File> {
         FORWARD {
             public int compare(File f1, File f2) {
                 return f1.getName().compareTo(f2.getName());
             }
         },
         REVERSE {
             public int compare(File f1, File f2) {
                 return -f1.getName().compareTo(f2.getName());
             }
         };
     };
     protected SortFiles sortFiles;
     /**
      * Register a Context.Factory to create a JavacFileManager.
      */
     public static void preRegister(Context context) {
         context.put(JavaFileManager.class, new Context.Factory<JavaFileManager>() {
             public JavaFileManager make(Context c) {
                 return new JavacFileManager(c, true, null);
             }
         });
     }
     /**
      * Create a JavacFileManager using a given context, optionally registering
      * it as the JavaFileManager for that context.
      */
     public JavacFileManager(Context context, boolean register, Charset charset) {
         super(charset);
         if (register)
             context.put(JavaFileManager.class, this);
         setContext(context);
     }
     /**
      * Set the context for JavacFileManager.
      */
     @Override
     public void setContext(Context context) {
         super.setContext(context);
         if (paths == null) {
             paths = Paths.instance(context);
         } else {
             // Reuse the Paths object as it stores the locations that
             // have been set with setLocation, etc.
             paths.setContext(context);
         }
         fsInfo = FSInfo.instance(context);
         contextUseOptimizedZip = options.getBoolean("useOptimizedZip", true);
         if (contextUseOptimizedZip)
             zipFileIndexCache = ZipFileIndexCache.getSharedInstance();
         mmappedIO = options.isSet("mmappedIO");
         ignoreSymbolFile = options.isSet("ignore.symbol.file");
         String sf = options.get("sortFiles");
         if (sf != null) {
             sortFiles = (sf.equals("reverse") ? SortFiles.REVERSE : SortFiles.FORWARD);
         }
     }
     @Override
     public boolean isDefaultBootClassPath() {
         return paths.isDefaultBootClassPath();
     }
     public JavaFileObject getFileForInput(String name) {
         return getRegularFile(new File(name));
     }
     public JavaFileObject getRegularFile(File file) {
         return new RegularFileObject(this, file);
     }
     public JavaFileObject getFileForOutput(String classname,
                                            JavaFileObject.Kind kind,
                                            JavaFileObject sibling)
         throws IOException
     {
         return getJavaFileForOutput(CLASS_OUTPUT, classname, kind, sibling);
     }
     public Iterable<? extends JavaFileObject> getJavaFileObjectsFromStrings(Iterable<String> names) {
         ListBuffer<File> files = new ListBuffer<File>();
         for (String name : names)
             files.append(new File(nullCheck(name)));
         return getJavaFileObjectsFromFiles(files.toList());
     }
     public Iterable<? extends JavaFileObject> getJavaFileObjects(String... names) {
         return getJavaFileObjectsFromStrings(Arrays.asList(nullCheck(names)));
     }
     private static boolean isValidName(String name) {
         // Arguably, isValidName should reject keywords (such as in SourceVersion.isName() ),
         // but the set of keywords depends on the source level, and we don't want
         // impls of JavaFileManager to have to be dependent on the source level.
         // Therefore we simply check that the argument is a sequence of identifiers
         // separated by ".".
         for (String s : name.split("\\.", -1)) {
             if (!SourceVersion.isIdentifier(s))
                 return false;
         }
         return true;
     }
     private static void validateClassName(String className) {
         if (!isValidName(className))
             throw new IllegalArgumentException("Invalid class name: " + className);
     }
     private static void validatePackageName(String packageName) {
         if (packageName.length() > 0 && !isValidName(packageName))
             throw new IllegalArgumentException("Invalid packageName name: " + packageName);
     }
     public static void testName(String name,
                                 boolean isValidPackageName,
                                 boolean isValidClassName)
     {
         try {
             validatePackageName(name);
             if (!isValidPackageName)
                 throw new AssertionError("Invalid package name accepted: " + name);
             printAscii("Valid package name: \"%s\"", name);
         } catch (IllegalArgumentException e) {
             if (isValidPackageName)
                 throw new AssertionError("Valid package name rejected: " + name);
             printAscii("Invalid package name: \"%s\"", name);
         }
         try {
             validateClassName(name);
             if (!isValidClassName)
                 throw new AssertionError("Invalid class name accepted: " + name);
             printAscii("Valid class name: \"%s\"", name);
         } catch (IllegalArgumentException e) {
             if (isValidClassName)
                 throw new AssertionError("Valid class name rejected: " + name);
             printAscii("Invalid class name: \"%s\"", name);
         }
     }
     private static void printAscii(String format, Object... args) {
         String message;
         try {
             final String ascii = "US-ASCII";
             message = new String(String.format(null, format, args).getBytes(ascii), ascii);
         } catch (java.io.UnsupportedEncodingException ex) {
             throw new AssertionError(ex);
         }
         System.out.println(message);
     }
     /**
      * Insert all files in subdirectory subdirectory of directory directory
      * which match fileKinds into resultList
      */
     private void listDirectory(File directory,
                                RelativeDirectory subdirectory,
                                Set<JavaFileObject.Kind> fileKinds,
                                boolean recurse,
                                ListBuffer<JavaFileObject> resultList) {
         File d = subdirectory.getFile(directory);
         if (!caseMapCheck(d, subdirectory))
             return;
         File[] files = d.listFiles();
         if (files == null)
             return;
         if (sortFiles != null)
             Arrays.sort(files, sortFiles);
         for (File f: files) {
             String fname = f.getName();
             if (f.isDirectory()) {
                 if (recurse && SourceVersion.isIdentifier(fname)) {
                     listDirectory(directory,
                                   new RelativeDirectory(subdirectory, fname),
                                   fileKinds,
                                   recurse,
                                   resultList);
                 }
             } else {
                 if (isValidFile(fname, fileKinds)) {
                     JavaFileObject fe =
                         new RegularFileObject(this, fname, new File(d, fname));
                     resultList.append(fe);
                 }
             }
         }
     }
     /**
      * Insert all files in subdirectory subdirectory of archive archive
      * which match fileKinds into resultList
      */
     private void listArchive(Archive archive,
                                RelativeDirectory subdirectory,
                                Set<JavaFileObject.Kind> fileKinds,
                                boolean recurse,
                                ListBuffer<JavaFileObject> resultList) {
         // Get the files directly in the subdir
         List<String> files = archive.getFiles(subdirectory);
         if (files != null) {
             for (; !files.isEmpty(); files = files.tail) {
                 String file = files.head;
                 if (isValidFile(file, fileKinds)) {
                     resultList.append(archive.getFileObject(subdirectory, file));
                 }
             }
         }
         if (recurse) {
             for (RelativeDirectory s: archive.getSubdirectories()) {
                 if (subdirectory.contains(s)) {
                     // Because the archive map is a flat list of directories,
                     // the enclosing loop will pick up all child subdirectories.
                     // Therefore, there is no need to recurse deeper.
                     listArchive(archive, s, fileKinds, false, resultList);
                 }
             }
         }
     }
     /**
      * container is a directory, a zip file, or a non-existant path.
      * Insert all files in subdirectory subdirectory of container which
      * match fileKinds into resultList
      */
     private void listContainer(File container,
                                RelativeDirectory subdirectory,
                                Set<JavaFileObject.Kind> fileKinds,
                                boolean recurse,
                                ListBuffer<JavaFileObject> resultList) {
         Archive archive = archives.get(container);
         if (archive == null) {
             // archives are not created for directories.
             if  (fsInfo.isDirectory(container)) {
                 listDirectory(container,
                               subdirectory,
                               fileKinds,
                               recurse,
                               resultList);
                 return;
             }
             // Not a directory; either a file or non-existant, create the archive
             try {
                 archive = openArchive(container);
             } catch (IOException ex) {
                 log.error("error.reading.file",
                           container, getMessage(ex));
                 return;
             }
         }
         listArchive(archive,
                     subdirectory,
                     fileKinds,
                     recurse,
                     resultList);
     }
     private boolean isValidFile(String s, Set<JavaFileObject.Kind> fileKinds) {
         JavaFileObject.Kind kind = getKind(s);
         return fileKinds.contains(kind);
     }
     private static final boolean fileSystemIsCaseSensitive =
         File.separatorChar == '/';
     /** Hack to make Windows case sensitive. Test whether given path
      *  ends in a string of characters with the same case as given name.
      *  Ignore file separators in both path and name.
      */
     private boolean caseMapCheck(File f, RelativePath name) {
         if (fileSystemIsCaseSensitive) return true;
         // Note that getCanonicalPath() returns the case-sensitive
         // spelled file name.
         String path;
         try {
             path = f.getCanonicalPath();
         } catch (IOException ex) {
             return false;
         }
         char[] pcs = path.toCharArray();
         char[] ncs = name.path.toCharArray();
         int i = pcs.length - 1;
         int j = ncs.length - 1;
         while (i >= 0 && j >= 0) {
             while (i >= 0 && pcs[i] == File.separatorChar) i--;
             while (j >= 0 && ncs[j] == '/') j--;
             if (i >= 0 && j >= 0) {
                 if (pcs[i] != ncs[j]) return false;
                 i--;
                 j--;
             }
         }
         return j < 0;
     }
     /**
      * An archive provides a flat directory structure of a ZipFile by
      * mapping directory names to lists of files (basenames).
      */
     public interface Archive {
         void close() throws IOException;
         boolean contains(RelativePath name);
         JavaFileObject getFileObject(RelativeDirectory subdirectory, String file);
         List<String> getFiles(RelativeDirectory subdirectory);
         Set<RelativeDirectory> getSubdirectories();
     }
     public class MissingArchive implements Archive {
         final File zipFileName;
         public MissingArchive(File name) {
             zipFileName = name;
         }
         public boolean contains(RelativePath name) {
             return false;
         }
         public void close() {
         }
         public JavaFileObject getFileObject(RelativeDirectory subdirectory, String file) {
             return null;
         }
         public List<String> getFiles(RelativeDirectory subdirectory) {
             return List.nil();
         }
         public Set<RelativeDirectory> getSubdirectories() {
             return Collections.emptySet();
         }
         @Override
         public String toString() {
             return "MissingArchive[" + zipFileName + "]";
         }
     }
     /** A directory of zip files already opened.
      */
     Map<File, Archive> archives = new HashMap<File,Archive>();
     private static final String[] symbolFileLocation = { "lib", "ct.sym" };
     private static final RelativeDirectory symbolFilePrefix
             = new RelativeDirectory("META-INF/sym/rt.jar/");
     /*
      * This method looks for a ZipFormatException and takes appropriate
      * evasive action. If there is a failure in the fast mode then we
      * fail over to the platform zip, and allow it to deal with a potentially
      * non compliant zip file.
      */
     protected Archive openArchive(File zipFilename) throws IOException {
         try {
             return openArchive(zipFilename, contextUseOptimizedZip);
         } catch (IOException ioe) {
             if (ioe instanceof ZipFileIndex.ZipFormatException) {
                 return openArchive(zipFilename, false);
             } else {
                 throw ioe;
             }
         }
     }
     /** Open a new zip file directory, and cache it.
      */
     private Archive openArchive(File zipFileName, boolean useOptimizedZip) throws IOException {
         File origZipFileName = zipFileName;
         if (!ignoreSymbolFile && paths.isDefaultBootClassPathRtJar(zipFileName)) {
             File file = zipFileName.getParentFile().getParentFile(); // ${java.home}
             if (new File(file.getName()).equals(new File("jre")))
                 file = file.getParentFile();
             // file == ${jdk.home}
             for (String name : symbolFileLocation)
                 file = new File(file, name);
             // file == ${jdk.home}/lib/ct.sym
             if (file.exists())
                 zipFileName = file;
         }
         Archive archive;
         try {
             ZipFile zdir = null;
             boolean usePreindexedCache = false;
             String preindexCacheLocation = null;
             if (!useOptimizedZip) {
                 zdir = new ZipFile(zipFileName);
             } else {
                 usePreindexedCache = options.isSet("usezipindex");
                 preindexCacheLocation = options.get("java.io.tmpdir");
                 String optCacheLoc = options.get("cachezipindexdir");
                 if (optCacheLoc != null && optCacheLoc.length() != 0) {
                     if (optCacheLoc.startsWith("\"")) {
                         if (optCacheLoc.endsWith("\"")) {
                             optCacheLoc = optCacheLoc.substring(1, optCacheLoc.length() - 1);
                         }
                         else {
                             optCacheLoc = optCacheLoc.substring(1);
                         }
                     }
                     File cacheDir = new File(optCacheLoc);
                     if (cacheDir.exists() && cacheDir.canWrite()) {
                         preindexCacheLocation = optCacheLoc;
                         if (!preindexCacheLocation.endsWith("/") &&
                             !preindexCacheLocation.endsWith(File.separator)) {
                             preindexCacheLocation += File.separator;
                         }
                     }
                 }
             }
             if (origZipFileName == zipFileName) {
                 if (!useOptimizedZip) {
                     archive = new ZipArchive(this, zdir);
                 } else {
                     archive = new ZipFileIndexArchive(this,
                                     zipFileIndexCache.getZipFileIndex(zipFileName,
                                     null,
                                     usePreindexedCache,
                                     preindexCacheLocation,
                                     options.isSet("writezipindexfiles")));
                 }
             } else {
                 if (!useOptimizedZip) {
                     archive = new SymbolArchive(this, origZipFileName, zdir, symbolFilePrefix);
                 } else {
                     archive = new ZipFileIndexArchive(this,
                                     zipFileIndexCache.getZipFileIndex(zipFileName,
                                     symbolFilePrefix,
                                     usePreindexedCache,
                                     preindexCacheLocation,
                                     options.isSet("writezipindexfiles")));
                 }
             }
         } catch (FileNotFoundException ex) {
             archive = new MissingArchive(zipFileName);
         } catch (ZipFileIndex.ZipFormatException zfe) {
             throw zfe;
         } catch (IOException ex) {
             if (zipFileName.exists())
                 log.error("error.reading.file", zipFileName, getMessage(ex));
             archive = new MissingArchive(zipFileName);
         }
         archives.put(origZipFileName, archive);
         return archive;
     }
     /** Flush any output resources.
      */
     public void flush() {
         contentCache.clear();
     }
     /**
      * Close the JavaFileManager, releasing resources.
      */
     public void close() {
         for (Iterator<Archive> i = archives.values().iterator(); i.hasNext(); ) {
             Archive a = i.next();
             i.remove();
             try {
                 a.close();
             } catch (IOException e) {
             }
         }
     }
     private String defaultEncodingName;
     private String getDefaultEncodingName() {
         if (defaultEncodingName == null) {
             defaultEncodingName =
                 new OutputStreamWriter(new ByteArrayOutputStream()).getEncoding();
         }
         return defaultEncodingName;
     }
     public ClassLoader getClassLoader(Location location) {
         nullCheck(location);
         Iterable<? extends File> path = getLocation(location);
         if (path == null)
             return null;
         ListBuffer<URL> lb = new ListBuffer<URL>();
         for (File f: path) {
             try {
                 lb.append(f.toURI().toURL());
             } catch (MalformedURLException e) {
                 throw new AssertionError(e);
             }
         }
         return getClassLoader(lb.toArray(new URL[lb.size()]));
     }
     public Iterable<JavaFileObject> list(Location location,
                                          String packageName,
                                          Set<JavaFileObject.Kind> kinds,
                                          boolean recurse)
         throws IOException
     {
         // validatePackageName(packageName);
         nullCheck(packageName);
         nullCheck(kinds);
         Iterable<? extends File> path = getLocation(location);
         if (path == null)
             return List.nil();
         RelativeDirectory subdirectory = RelativeDirectory.forPackage(packageName);
         ListBuffer<JavaFileObject> results = new ListBuffer<JavaFileObject>();
         for (File directory : path)
             listContainer(directory, subdirectory, kinds, recurse, results);
         return results.toList();
     }
     public String inferBinaryName(Location location, JavaFileObject file) {
         file.getClass(); // null check
         location.getClass(); // null check
         // Need to match the path semantics of list(location, ...)
         Iterable<? extends File> path = getLocation(location);
         if (path == null) {
             return null;
         }
         if (file instanceof BaseFileObject) {
             return ((BaseFileObject) file).inferBinaryName(path);
         } else
             throw new IllegalArgumentException(file.getClass().getName());
     }
     public boolean isSameFile(FileObject a, FileObject b) {
         nullCheck(a);
         nullCheck(b);
         if (!(a instanceof BaseFileObject))
             throw new IllegalArgumentException("Not supported: " + a);
         if (!(b instanceof BaseFileObject))
             throw new IllegalArgumentException("Not supported: " + b);
         return a.equals(b);
     }
     public boolean hasLocation(Location location) {
         return getLocation(location) != null;
     }
     public JavaFileObject getJavaFileForInput(Location location,
                                               String className,
                                               JavaFileObject.Kind kind)
         throws IOException
     {
         nullCheck(location);
         // validateClassName(className);
         nullCheck(className);
         nullCheck(kind);
         if (!sourceOrClass.contains(kind))
             throw new IllegalArgumentException("Invalid kind: " + kind);
         return getFileForInput(location, RelativeFile.forClass(className, kind));
     }
     public FileObject getFileForInput(Location location,
                                       String packageName,
                                       String relativeName)
         throws IOException
     {
         nullCheck(location);
         // validatePackageName(packageName);
         nullCheck(packageName);
         if (!isRelativeUri(relativeName))
             throw new IllegalArgumentException("Invalid relative name: " + relativeName);
         RelativeFile name = packageName.length() == 0
             ? new RelativeFile(relativeName)
             : new RelativeFile(RelativeDirectory.forPackage(packageName), relativeName);
         return getFileForInput(location, name);
     }
     private JavaFileObject getFileForInput(Location location, RelativeFile name) throws IOException {
         Iterable<? extends File> path = getLocation(location);
         if (path == null)
             return null;
         for (File dir: path) {
             Archive a = archives.get(dir);
             if (a == null) {
                 if (fsInfo.isDirectory(dir)) {
                     File f = name.getFile(dir);
                     if (f.exists())
                         return new RegularFileObject(this, f);
                     continue;
                 }
                 // Not a directory, create the archive
                 a = openArchive(dir);
             }
             // Process the archive
             if (a.contains(name)) {
                 return a.getFileObject(name.dirname(), name.basename());
             }
         }
         return null;
     }
     public JavaFileObject getJavaFileForOutput(Location location,
                                                String className,
                                                JavaFileObject.Kind kind,
                                                FileObject sibling)
         throws IOException
     {
         nullCheck(location);
         // validateClassName(className);
         nullCheck(className);
         nullCheck(kind);
         if (!sourceOrClass.contains(kind))
             throw new IllegalArgumentException("Invalid kind: " + kind);
         return getFileForOutput(location, RelativeFile.forClass(className, kind), sibling);
     }
     public FileObject getFileForOutput(Location location,
                                        String packageName,
                                        String relativeName,
                                        FileObject sibling)
         throws IOException
     {
         nullCheck(location);
         // validatePackageName(packageName);
         nullCheck(packageName);
         if (!isRelativeUri(relativeName))
             throw new IllegalArgumentException("Invalid relative name: " + relativeName);
         RelativeFile name = packageName.length() == 0
             ? new RelativeFile(relativeName)
             : new RelativeFile(RelativeDirectory.forPackage(packageName), relativeName);
         return getFileForOutput(location, name, sibling);
     }
     private JavaFileObject getFileForOutput(Location location,
                                             RelativeFile fileName,
                                             FileObject sibling)
         throws IOException
     {
         File dir;
         if (location == CLASS_OUTPUT) {
             if (getClassOutDir() != null) {
                 dir = getClassOutDir();
             } else {
                 File siblingDir = null;
                 if (sibling != null && sibling instanceof RegularFileObject) {
                     siblingDir = ((RegularFileObject)sibling).file.getParentFile();
                 }
                 return new RegularFileObject(this, new File(siblingDir, fileName.basename()));
             }
         } else if (location == SOURCE_OUTPUT) {
             dir = (getSourceOutDir() != null ? getSourceOutDir() : getClassOutDir());
         } else {
             Iterable<? extends File> path = paths.getPathForLocation(location);
             dir = null;
             for (File f: path) {
                 dir = f;
                 break;
             }
         }
         File file = fileName.getFile(dir); // null-safe
         return new RegularFileObject(this, file);
     }
     public Iterable<? extends JavaFileObject> getJavaFileObjectsFromFiles(
         Iterable<? extends File> files)
     {
         ArrayList<RegularFileObject> result;
         if (files instanceof Collection<?>)
             result = new ArrayList<RegularFileObject>(((Collection<?>)files).size());
         else
             result = new ArrayList<RegularFileObject>();
         for (File f: files)
             result.add(new RegularFileObject(this, nullCheck(f)));
         return result;
     }
     public Iterable<? extends JavaFileObject> getJavaFileObjects(File... files) {
         return getJavaFileObjectsFromFiles(Arrays.asList(nullCheck(files)));
     }
     public void setLocation(Location location,
                             Iterable<? extends File> path)
         throws IOException
     {
         nullCheck(location);
         paths.lazy();
         final File dir = location.isOutputLocation() ? getOutputDirectory(path) : null;
         if (location == CLASS_OUTPUT)
             classOutDir = getOutputLocation(dir, D);
         else if (location == SOURCE_OUTPUT)
             sourceOutDir = getOutputLocation(dir, S);
         else
             paths.setPathForLocation(location, path);
     }
     // where
         private File getOutputDirectory(Iterable<? extends File> path) throws IOException {
             if (path == null)
                 return null;
             Iterator<? extends File> pathIter = path.iterator();
             if (!pathIter.hasNext())
                 throw new IllegalArgumentException("empty path for directory");
             File dir = pathIter.next();
             if (pathIter.hasNext())
                 throw new IllegalArgumentException("path too long for directory");
             if (!dir.exists())
                 throw new FileNotFoundException(dir + ": does not exist");
             else if (!dir.isDirectory())
                 throw new IOException(dir + ": not a directory");
             return dir;
         }
     private File getOutputLocation(File dir, OptionName defaultOptionName) {
         if (dir != null)
             return dir;
         String arg = options.get(defaultOptionName);
         if (arg == null)
             return null;
         return new File(arg);
     }
     public Iterable<? extends File> getLocation(Location location) {
         nullCheck(location);
         paths.lazy();
         if (location == CLASS_OUTPUT) {
             return (getClassOutDir() == null ? null : List.of(getClassOutDir()));
         } else if (location == SOURCE_OUTPUT) {
             return (getSourceOutDir() == null ? null : List.of(getSourceOutDir()));
         } else
             return paths.getPathForLocation(location);
     }
     private File getClassOutDir() {
         if (classOutDir == uninited)
             classOutDir = getOutputLocation(null, D);
         return classOutDir;
     }
     private File getSourceOutDir() {
         if (sourceOutDir == uninited)
             sourceOutDir = getOutputLocation(null, S);
         return sourceOutDir;
     }
     /**
      * Enforces the specification of a "relative" URI as used in
      * {@linkplain #getFileForInput(Location,String,URI)
      * getFileForInput}.  This method must follow the rules defined in
      * that method, do not make any changes without consulting the
      * specification.
      */
     protected static boolean isRelativeUri(URI uri) {
         if (uri.isAbsolute())
             return false;
         String path = uri.normalize().getPath();
         if (path.length() == 0 /* isEmpty() is mustang API */)
             return false;
         if (!path.equals(uri.getPath())) // implicitly checks for embedded . and ..
             return false;
         if (path.startsWith("/") || path.startsWith("./") || path.startsWith("../"))
             return false;
         return true;
     }
     // Convenience method
     protected static boolean isRelativeUri(String u) {
         try {
             return isRelativeUri(new URI(u));
         } catch (URISyntaxException e) {
             return false;
         }
     }
     /**
      * Converts a relative file name to a relative URI.  This is
      * different from File.toURI as this method does not canonicalize
      * the file before creating the URI.  Furthermore, no schema is
      * used.
      * @param file a relative file name
      * @return a relative URI
      * @throws IllegalArgumentException if the file name is not
      * relative according to the definition given in {@link
      * javax.tools.JavaFileManager#getFileForInput}
      */
     public static String getRelativeName(File file) {
         if (!file.isAbsolute()) {
             String result = file.getPath().replace(File.separatorChar, '/');
             if (isRelativeUri(result))
                 return result;
         }
         throw new IllegalArgumentException("Invalid relative path: " + file);
     }
     /**
      * Get a detail message from an IOException.
      * Most, but not all, instances of IOException provide a non-null result
      * for getLocalizedMessage().  But some instances return null: in these
      * cases, fallover to getMessage(), and if even that is null, return the
      * name of the exception itself.
      * @param e an IOException
      * @return a string to include in a compiler diagnostic
      */
     public static String getMessage(IOException e) {
         String s = e.getLocalizedMessage();
         if (s != null)
             return s;
         s = e.getMessage();
         if (s != null)
             return s;
         return e.toString();
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/file/JavacFileManager.java@6970d9fb8e02 (annotated)

src/share/classes/com/sun/tools/javac/file/JavacFileManager.java