--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/file/JavacFileManager.java Sun Aug 17 15:52:32 2014 +0100
@@ -0,0 +1,868 @@
+/*
+ * Copyright (c) 2005, 2014, 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.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.Comparator;
+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.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.*;
+
+/**
+ * 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();
+ }
+
+ private FSInfo fsInfo;
+
+ private boolean contextUseOptimizedZip;
+ private ZipFileIndexCache zipFileIndexCache;
+
+ private final Set<JavaFileObject.Kind> sourceOrClass =
+ EnumSet.of(JavaFileObject.Kind.SOURCE, JavaFileObject.Kind.CLASS);
+
+ protected boolean mmappedIO;
+ protected boolean symbolFileEnabled;
+
+ 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);
+
+ fsInfo = FSInfo.instance(context);
+
+ contextUseOptimizedZip = options.getBoolean("useOptimizedZip", true);
+ if (contextUseOptimizedZip)
+ zipFileIndexCache = ZipFileIndexCache.getSharedInstance();
+
+ mmappedIO = options.isSet("mmappedIO");
+ symbolFileEnabled = !options.isSet("ignore.symbol.file");
+
+ String sf = options.get("sortFiles");
+ if (sf != null) {
+ sortFiles = (sf.equals("reverse") ? SortFiles.REVERSE : SortFiles.FORWARD);
+ }
+ }
+
+ /**
+ * Set whether or not to use ct.sym as an alternate to rt.jar.
+ */
+ public void setSymbolFileEnabled(boolean b) {
+ symbolFileEnabled = b;
+ }
+
+ 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<>();
+ 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<>();
+
+ 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 (symbolFileEnabled && locations.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) {
+ }
+ }
+ }
+
+ public ClassLoader getClassLoader(Location location) {
+ nullCheck(location);
+ Iterable<? extends File> path = getLocation(location);
+ if (path == null)
+ return null;
+ ListBuffer<URL> lb = new ListBuffer<>();
+ 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<>();
+
+ 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 = locations.getLocation(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<>(((Collection<?>)files).size());
+ else
+ result = new ArrayList<>();
+ 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);
+ locations.setLocation(location, path);
+ }
+
+ public Iterable<? extends File> getLocation(Location location) {
+ nullCheck(location);
+ return locations.getLocation(location);
+ }
+
+ private File getClassOutDir() {
+ return locations.getOutputLocation(CLASS_OUTPUT);
+ }
+
+ private File getSourceOutDir() {
+ return locations.getOutputLocation(SOURCE_OUTPUT);
+ }
+
+ /**
+ * Enforces the specification of a "relative" name as used in
+ * {@linkplain #getFileForInput(Location,String,String)
+ * 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();
+ }
+}