jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/file/Locations.java@0e5899f09dab (annotated)

src/share/classes/com/sun/tools/javac/file/Locations.java@0e5899f09dab (annotated)

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

Tue, 25 Sep 2012 13:06:58 -0700

author: jjg
date: Tue, 25 Sep 2012 13:06:58 -0700
changeset 1339: 0e5899f09dab
parent 1230: b14d9583ce92
child 1358: fc123bdeddb8
permissions: -rw-r--r--

7193657: provide internal ArrayUtils class to simplify common usage of arrays in javac
Reviewed-by: mcimadamore, jjg
Contributed-by: vicenterz@yahoo.es

 /*
  * Copyright (c) 2003, 2012, 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.io.FileNotFoundException;
 import java.util.Iterator;
 import java.io.File;
 import java.io.IOException;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.EnumMap;
 import java.util.EnumSet;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.Map;
 import java.util.Set;
 import java.util.StringTokenizer;
 import java.util.zip.ZipFile;
 import javax.tools.JavaFileManager.Location;
 import javax.tools.StandardLocation;
 import com.sun.tools.javac.code.Lint;
 import com.sun.tools.javac.main.Option;
 import com.sun.tools.javac.util.ListBuffer;
 import com.sun.tools.javac.util.Log;
 import com.sun.tools.javac.util.Options;
 import javax.tools.JavaFileManager;
 import static javax.tools.StandardLocation.*;
 import static com.sun.tools.javac.main.Option.*;
 /** This class converts command line arguments, environment variables
  *  and system properties (in File.pathSeparator-separated String form)
  *  into a boot class path, user class path, and source path (in
  *  Collection<String> form).
  *
  *  <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 Locations {
     /** The log to use for warning output */
     private Log log;
     /** Collection of command-line options */
     private Options options;
     /** Handler for -Xlint options */
     private Lint lint;
     /** Access to (possibly cached) file info */
     private FSInfo fsInfo;
     /** Whether to warn about non-existent path elements */
     private boolean warn;
     // TODO: remove need for this
     private boolean inited = false; // TODO? caching bad?
     public Locations() {
         initHandlers();
     }
     public void update(Log log, Options options, Lint lint, FSInfo fsInfo) {
         this.log = log;
         this.options = options;
         this.lint = lint;
         this.fsInfo = fsInfo;
     }
     public Collection<File> bootClassPath() {
         return getLocation(PLATFORM_CLASS_PATH);
     }
     public boolean isDefaultBootClassPath() {
         BootClassPathLocationHandler h =
                 (BootClassPathLocationHandler) getHandler(PLATFORM_CLASS_PATH);
         return h.isDefault();
     }
     boolean isDefaultBootClassPathRtJar(File file) {
         BootClassPathLocationHandler h =
                 (BootClassPathLocationHandler) getHandler(PLATFORM_CLASS_PATH);
         return h.isDefaultRtJar(file);
     }
     public Collection<File> userClassPath() {
         return getLocation(CLASS_PATH);
     }
     public Collection<File> sourcePath() {
         Collection<File> p = getLocation(SOURCE_PATH);
         // TODO: this should be handled by the LocationHandler
         return p == null || p.isEmpty() ? null : p;
     }
     /**
      * Split a path into its elements. Empty path elements will be ignored.
      * @param path The path to be split
      * @return The elements of the path
      */
     private static Iterable<File> getPathEntries(String path) {
         return getPathEntries(path, null);
     }
     /**
      * Split a path into its elements. If emptyPathDefault is not null, all
      * empty elements in the path, including empty elements at either end of
      * the path, will be replaced with the value of emptyPathDefault.
      * @param path The path to be split
      * @param emptyPathDefault The value to substitute for empty path elements,
      *  or null, to ignore empty path elements
      * @return The elements of the path
      */
     private static Iterable<File> getPathEntries(String path, File emptyPathDefault) {
         ListBuffer<File> entries = new ListBuffer<File>();
         int start = 0;
         while (start <= path.length()) {
             int sep = path.indexOf(File.pathSeparatorChar, start);
             if (sep == -1)
                 sep = path.length();
             if (start < sep)
                 entries.add(new File(path.substring(start, sep)));
             else if (emptyPathDefault != null)
                 entries.add(emptyPathDefault);
             start = sep + 1;
         }
         return entries;
     }
     /**
      * Utility class to help evaluate a path option.
      * Duplicate entries are ignored, jar class paths can be expanded.
      */
     private class Path extends LinkedHashSet<File> {
         private static final long serialVersionUID = 0;
         private boolean expandJarClassPaths = false;
         private Set<File> canonicalValues = new HashSet<File>();
         public Path expandJarClassPaths(boolean x) {
             expandJarClassPaths = x;
             return this;
         }
         /** What to use when path element is the empty string */
         private File emptyPathDefault = null;
         public Path emptyPathDefault(File x) {
             emptyPathDefault = x;
             return this;
         }
         public Path() { super(); }
         public Path addDirectories(String dirs, boolean warn) {
             boolean prev = expandJarClassPaths;
             expandJarClassPaths = true;
             try {
                 if (dirs != null)
                     for (File dir : getPathEntries(dirs))
                         addDirectory(dir, warn);
                 return this;
             } finally {
                 expandJarClassPaths = prev;
             }
         }
         public Path addDirectories(String dirs) {
             return addDirectories(dirs, warn);
         }
         private void addDirectory(File dir, boolean warn) {
             if (!dir.isDirectory()) {
                 if (warn)
                     log.warning(Lint.LintCategory.PATH,
                             "dir.path.element.not.found", dir);
                 return;
             }
             File[] files = dir.listFiles();
             if (files == null)
                 return;
             for (File direntry : files) {
                 if (isArchive(direntry))
                     addFile(direntry, warn);
             }
         }
         public Path addFiles(String files, boolean warn) {
             if (files != null) {
                 addFiles(getPathEntries(files, emptyPathDefault), warn);
             }
             return this;
         }
         public Path addFiles(String files) {
             return addFiles(files, warn);
         }
         public Path addFiles(Iterable<? extends File> files, boolean warn) {
             if (files != null) {
                 for (File file: files)
                     addFile(file, warn);
             }
             return this;
         }
         public Path addFiles(Iterable<? extends File> files) {
             return addFiles(files, warn);
         }
         public void addFile(File file, boolean warn) {
             if (contains(file)) {
                 // discard duplicates
                 return;
             }
             if (! fsInfo.exists(file)) {
                 /* No such file or directory exists */
                 if (warn) {
                     log.warning(Lint.LintCategory.PATH,
                             "path.element.not.found", file);
                 }
                 super.add(file);
                 return;
             }
             File canonFile = fsInfo.getCanonicalFile(file);
             if (canonicalValues.contains(canonFile)) {
                 /* Discard duplicates and avoid infinite recursion */
                 return;
             }
             if (fsInfo.isFile(file)) {
                 /* File is an ordinary file. */
                 if (!isArchive(file)) {
                     /* Not a recognized extension; open it to see if
                      it looks like a valid zip file. */
                     try {
                         ZipFile z = new ZipFile(file);
                         z.close();
                         if (warn) {
                             log.warning(Lint.LintCategory.PATH,
                                     "unexpected.archive.file", file);
                         }
                     } catch (IOException e) {
                         // FIXME: include e.getLocalizedMessage in warning
                         if (warn) {
                             log.warning(Lint.LintCategory.PATH,
                                     "invalid.archive.file", file);
                         }
                         return;
                     }
                 }
             }
             /* Now what we have left is either a directory or a file name
                conforming to archive naming convention */
             super.add(file);
             canonicalValues.add(canonFile);
             if (expandJarClassPaths && fsInfo.isFile(file))
                 addJarClassPath(file, warn);
         }
         // Adds referenced classpath elements from a jar's Class-Path
         // Manifest entry.  In some future release, we may want to
         // update this code to recognize URLs rather than simple
         // filenames, but if we do, we should redo all path-related code.
         private void addJarClassPath(File jarFile, boolean warn) {
             try {
                 for (File f: fsInfo.getJarClassPath(jarFile)) {
                     addFile(f, warn);
                 }
             } catch (IOException e) {
                 log.error("error.reading.file", jarFile, JavacFileManager.getMessage(e));
             }
         }
     }
     /**
      * Base class for handling support for the representation of Locations.
      * Implementations are responsible for handling the interactions between
      * the command line options for a location, and API access via setLocation.
      * @see #initHandlers
      * @see #getHandler
      */
     protected abstract class LocationHandler {
         final Location location;
         final Set<Option> options;
         /**
          * Create a handler. The location and options provide a way to map
          * from a location or an option to the corresponding handler.
          * @see #initHandlers
          */
         protected LocationHandler(Location location, Option... options) {
             this.location = location;
             this.options = options.length == 0 ?
                 EnumSet.noneOf(Option.class):
                 EnumSet.copyOf(Arrays.asList(options));
         }
         // TODO: TEMPORARY, while Options still used for command line options
         void update(Options optionTable) {
             for (Option o: options) {
                 String v = optionTable.get(o);
                 if (v != null) {
                     handleOption(o, v);
                 }
             }
         }
         /** @see JavaFileManager#handleOption. */
         abstract boolean handleOption(Option option, String value);
         /** @see JavaFileManager#getLocation. */
         abstract Collection<File> getLocation();
         /** @see JavaFileManager#setLocation. */
         abstract void setLocation(Iterable<? extends File> files) throws IOException;
     }
     /**
      * General purpose implementation for output locations,
      * such as -d/CLASS_OUTPUT and -s/SOURCE_OUTPUT.
      * All options are treated as equivalent (i.e. aliases.)
      * The value is a single file, possibly null.
      */
     private class OutputLocationHandler extends LocationHandler {
         private File outputDir;
         OutputLocationHandler(Location location, Option... options) {
             super(location, options);
         }
         @Override
         boolean handleOption(Option option, String value) {
             if (!options.contains(option))
                 return false;
             // TODO: could/should validate outputDir exists and is a directory
             // need to decide how best to report issue for benefit of
             // direct API call on JavaFileManager.handleOption(specifies IAE)
             // vs. command line decoding.
             outputDir = new File(value);
             return true;
         }
         @Override
         Collection<File> getLocation() {
             return (outputDir == null) ? null : Collections.singleton(outputDir);
         }
         @Override
         void setLocation(Iterable<? extends File> files) throws IOException {
             if (files == null) {
                 outputDir = null;
             } else {
                 Iterator<? extends File> pathIter = files.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");
                 outputDir = dir;
             }
         }
     }
     /**
      * General purpose implementation for search path locations,
      * such as -sourcepath/SOURCE_PATH and -processorPath/ANNOTATION_PROCESS_PATH.
      * All options are treated as equivalent (i.e. aliases.)
      * The value is an ordered set of files and/or directories.
      */
     private class SimpleLocationHandler extends LocationHandler {
         protected Collection<File> searchPath;
         SimpleLocationHandler(Location location, Option... options) {
             super(location, options);
         }
         @Override
         boolean handleOption(Option option, String value) {
             if (!options.contains(option))
                 return false;
             searchPath = value == null ? null :
                     Collections.unmodifiableCollection(computePath(value));
             return true;
         }
         protected Path computePath(String value) {
             return new Path().addFiles(value);
         }
         @Override
         Collection<File> getLocation() {
             return searchPath;
         }
         @Override
         void setLocation(Iterable<? extends File> files) {
             Path p;
             if (files == null) {
                 p = computePath(null);
             } else {
                 p = new Path().addFiles(files);
             }
             searchPath = Collections.unmodifiableCollection(p);
         }
     }
     /**
      * Subtype of SimpleLocationHandler for -classpath/CLASS_PATH.
      * If no value is given, a default is provided, based on system properties
      * and other values.
      */
     private class ClassPathLocationHandler extends SimpleLocationHandler {
         ClassPathLocationHandler() {
             super(StandardLocation.CLASS_PATH,
                     Option.CLASSPATH, Option.CP);
         }
         @Override
         Collection<File> getLocation() {
             lazy();
             return searchPath;
         }
         @Override
         protected Path computePath(String value) {
             String cp = value;
             // CLASSPATH environment variable when run from `javac'.
             if (cp == null) cp = System.getProperty("env.class.path");
             // If invoked via a java VM (not the javac launcher), use the
             // platform class path
             if (cp == null && System.getProperty("application.home") == null)
                 cp = System.getProperty("java.class.path");
             // Default to current working directory.
             if (cp == null) cp = ".";
             return new Path()
                 .expandJarClassPaths(true)        // Only search user jars for Class-Paths
                 .emptyPathDefault(new File("."))  // Empty path elt ==> current directory
                 .addFiles(cp);
             }
         private void lazy() {
             if (searchPath == null)
                 setLocation(null);
         }
     }
     /**
      * Custom subtype of LocationHandler for PLATFORM_CLASS_PATH.
      * Various options are supported for different components of the
      * platform class path.
      * Setting a value with setLocation overrides all existing option values.
      * Setting any option overrides any value set with setLocation, and reverts
      * to using default values for options that have not been set.
      * Setting -bootclasspath or -Xbootclasspath overrides any existing
      * value for -Xbootclasspath/p: and -Xbootclasspath/a:.
      */
     private class BootClassPathLocationHandler extends LocationHandler {
         private Collection<File> searchPath;
         final Map<Option, String> optionValues = new EnumMap<Option,String>(Option.class);
         /**
          * rt.jar as found on the default bootclasspath.
          * If the user specified a bootclasspath, null is used.
          */
         private File defaultBootClassPathRtJar = null;
         /**
          *  Is bootclasspath the default?
          */
         private boolean isDefaultBootClassPath;
         BootClassPathLocationHandler() {
             super(StandardLocation.PLATFORM_CLASS_PATH,
                     Option.BOOTCLASSPATH, Option.XBOOTCLASSPATH,
                     Option.XBOOTCLASSPATH_PREPEND,
                     Option.XBOOTCLASSPATH_APPEND,
                     Option.ENDORSEDDIRS, Option.DJAVA_ENDORSED_DIRS,
                     Option.EXTDIRS, Option.DJAVA_EXT_DIRS);
         }
         boolean isDefault() {
             lazy();
             return isDefaultBootClassPath;
         }
         boolean isDefaultRtJar(File file) {
             lazy();
             return file.equals(defaultBootClassPathRtJar);
         }
         @Override
         boolean handleOption(Option option, String value) {
             if (!options.contains(option))
                 return false;
             option = canonicalize(option);
             optionValues.put(option, value);
             if (option == BOOTCLASSPATH) {
                 optionValues.remove(XBOOTCLASSPATH_PREPEND);
                 optionValues.remove(XBOOTCLASSPATH_APPEND);
             }
             searchPath = null;  // reset to "uninitialized"
             return true;
         }
         // where
             // TODO: would be better if option aliasing was handled at a higher
             // level
             private Option canonicalize(Option option) {
                 switch (option) {
                     case XBOOTCLASSPATH:
                         return Option.BOOTCLASSPATH;
                     case DJAVA_ENDORSED_DIRS:
                         return Option.ENDORSEDDIRS;
                     case DJAVA_EXT_DIRS:
                         return Option.EXTDIRS;
                     default:
                         return option;
                 }
             }
         @Override
         Collection<File> getLocation() {
             lazy();
             return searchPath;
         }
         @Override
         void setLocation(Iterable<? extends File> files) {
             if (files == null) {
                 searchPath = null;  // reset to "uninitialized"
             } else {
                 defaultBootClassPathRtJar = null;
                 isDefaultBootClassPath = false;
                 Path p = new Path().addFiles(files, false);
                 searchPath = Collections.unmodifiableCollection(p);
                 optionValues.clear();
             }
         }
         Path computePath() {
             defaultBootClassPathRtJar = null;
             Path path = new Path();
             String bootclasspathOpt = optionValues.get(BOOTCLASSPATH);
             String endorseddirsOpt = optionValues.get(ENDORSEDDIRS);
             String extdirsOpt = optionValues.get(EXTDIRS);
             String xbootclasspathPrependOpt = optionValues.get(XBOOTCLASSPATH_PREPEND);
             String xbootclasspathAppendOpt = optionValues.get(XBOOTCLASSPATH_APPEND);
             path.addFiles(xbootclasspathPrependOpt);
             if (endorseddirsOpt != null)
                 path.addDirectories(endorseddirsOpt);
             else
                 path.addDirectories(System.getProperty("java.endorsed.dirs"), false);
             if (bootclasspathOpt != null) {
                 path.addFiles(bootclasspathOpt);
             } else {
                 // Standard system classes for this compiler's release.
                 String files = System.getProperty("sun.boot.class.path");
                 path.addFiles(files, false);
                 File rt_jar = new File("rt.jar");
                 for (File file : getPathEntries(files)) {
                     if (new File(file.getName()).equals(rt_jar))
                         defaultBootClassPathRtJar = file;
                 }
             }
             path.addFiles(xbootclasspathAppendOpt);
             // Strictly speaking, standard extensions are not bootstrap
             // classes, but we treat them identically, so we'll pretend
             // that they are.
             if (extdirsOpt != null)
                 path.addDirectories(extdirsOpt);
             else
                 path.addDirectories(System.getProperty("java.ext.dirs"), false);
             isDefaultBootClassPath =
                     (xbootclasspathPrependOpt == null) &&
                     (bootclasspathOpt == null) &&
                     (xbootclasspathAppendOpt == null);
             return path;
         }
         private void lazy() {
             if (searchPath == null)
                 searchPath = Collections.unmodifiableCollection(computePath());
         }
     }
     Map<Location, LocationHandler> handlersForLocation;
     Map<Option, LocationHandler> handlersForOption;
     void initHandlers() {
         handlersForLocation = new HashMap<Location, LocationHandler>();
         handlersForOption = new EnumMap<Option, LocationHandler>(Option.class);
         LocationHandler[] handlers = {
             new BootClassPathLocationHandler(),
             new ClassPathLocationHandler(),
             new SimpleLocationHandler(StandardLocation.SOURCE_PATH, Option.SOURCEPATH),
             new SimpleLocationHandler(StandardLocation.ANNOTATION_PROCESSOR_PATH, Option.PROCESSORPATH),
             new OutputLocationHandler((StandardLocation.CLASS_OUTPUT), Option.D),
             new OutputLocationHandler((StandardLocation.SOURCE_OUTPUT), Option.S),
             new OutputLocationHandler((StandardLocation.NATIVE_HEADER_OUTPUT), Option.H)
         };
         for (LocationHandler h: handlers) {
             handlersForLocation.put(h.location, h);
             for (Option o: h.options)
                 handlersForOption.put(o, h);
         }
     }
     boolean handleOption(Option option, String value) {
         LocationHandler h = handlersForOption.get(option);
         return (h == null ? false : h.handleOption(option, value));
     }
     Collection<File> getLocation(Location location) {
         LocationHandler h = getHandler(location);
         return (h == null ? null : h.getLocation());
     }
     File getOutputLocation(Location location) {
         if (!location.isOutputLocation())
             throw new IllegalArgumentException();
         LocationHandler h = getHandler(location);
         return ((OutputLocationHandler) h).outputDir;
     }
     void setLocation(Location location, Iterable<? extends File> files) throws IOException {
         LocationHandler h = getHandler(location);
         if (h == null) {
             if (location.isOutputLocation())
                 h = new OutputLocationHandler(location);
             else
                 h = new SimpleLocationHandler(location);
             handlersForLocation.put(location, h);
         }
         h.setLocation(files);
     }
     protected LocationHandler getHandler(Location location) {
         location.getClass(); // null check
         lazy();
         return handlersForLocation.get(location);
     }
 // TOGO
     protected void lazy() {
         if (!inited) {
             warn = lint.isEnabled(Lint.LintCategory.PATH);
             for (LocationHandler h: handlersForLocation.values()) {
                 h.update(options);
             }
             inited = true;
         }
     }
     /** Is this the name of an archive file? */
     private boolean isArchive(File file) {
         String n = file.getName().toLowerCase();
         return fsInfo.isFile(file)
             && (n.endsWith(".jar") || n.endsWith(".zip"));
     }
     /**
      * Utility method for converting a search path string to an array
      * of directory and JAR file URLs.
      *
      * Note that this method is called by apt and the DocletInvoker.
      *
      * @param path the search path string
      * @return the resulting array of directory and JAR file URLs
      */
     public static URL[] pathToURLs(String path) {
         StringTokenizer st = new StringTokenizer(path, File.pathSeparator);
         URL[] urls = new URL[st.countTokens()];
         int count = 0;
         while (st.hasMoreTokens()) {
             URL url = fileToURL(new File(st.nextToken()));
             if (url != null) {
                 urls[count++] = url;
             }
         }
         urls = Arrays.copyOf(urls, count);
         return urls;
     }
     /**
      * Returns the directory or JAR file URL corresponding to the specified
      * local file name.
      *
      * @param file the File object
      * @return the resulting directory or JAR file URL, or null if unknown
      */
     private static URL fileToURL(File file) {
         String name;
         try {
             name = file.getCanonicalPath();
         } catch (IOException e) {
             name = file.getAbsolutePath();
         }
         name = name.replace(File.separatorChar, '/');
         if (!name.startsWith("/")) {
             name = "/" + name;
         }
         // If the file does not exist, then assume that it's a directory
         if (!file.isFile()) {
             name = name + "/";
         }
         try {
             return new URL("file", "", name);
         } catch (MalformedURLException e) {
             throw new IllegalArgumentException(file.toString());
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/file/Locations.java@0e5899f09dab (annotated)

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