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-/* VMFile.java -- Class for methods natively accessing files
- Copyright (C) 2004, 2006 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath 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 for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package java.io;
-
-import gnu.classpath.Configuration;
-import gnu.java.io.PlatformHelper;
-
-
-/**
- * @author Michael Koch (konqueror@gmx.de)
- */
-final class VMFile
-{
- // FIXME: We support only case sensitive filesystems currently.
- static final boolean IS_CASE_SENSITIVE = true;
- static final boolean IS_DOS_8_3 = false;
-
- static
- {
- if (Configuration.INIT_LOAD_LIBRARY)
- {
- System.loadLibrary("javaio");
- }
- }
-
- /*
- * This native method does the actual work of getting the last file
- * modification time. It also does the existence check to avoid the
- * overhead of a call to exists()
- */
- static native long lastModified(String path);
-
- /*
- * This native method sets the permissions to make the file read only.
- */
- static native boolean setReadOnly(String path);
-
- /**
- * This method is used to create a temporary file
- */
- static native boolean create(String path) throws IOException;
-
- /*
- * This native function actually produces the list of file in this
- * directory
- */
- static native String[] list(String dirpath);
-
- /*
- * This native method actually performs the rename.
- */
- static native boolean renameTo(String targetpath, String destpath);
-
- /*
- * This native method actually determines the length of the file and
- * handles the existence check
- */
- static native long length(String path);
-
- /*
- * This native method does the actual checking of file existence.
- */
- static native boolean exists(String path);
-
- /*
- * This native method handles the actual deleting of the file
- */
- static native boolean delete(String path);
-
- /*
- * This method does the actual setting of the modification time.
- */
- static native boolean setLastModified(String path, long time);
-
- /*
- * This native method actually creates the directory
- */
- static native boolean mkdir(String dirpath);
-
- /*
- * This native method does the actual check of whether or not a file
- * is a plain file or not. It also handles the existence check to
- * eliminate the overhead of a call to exists()
- */
- static native boolean isFile(String path);
-
- /**
- * This native method checks file permissions for writing
- */
- static synchronized native boolean canWrite(String path);
-
- /**
- * This methods checks if a directory can be written to.
- */
- static boolean canWriteDirectory(File dir)
- {
- try
- {
- String filename = IS_DOS_8_3 ? "tst" : "test-dir-write";
- File test = File.createTempFile(filename, null, dir);
- return (test != null && test.delete());
- }
- catch (IOException ioe)
- {
- return false;
- }
- }
-
- /**
- * This native method checks file permissions for reading
- */
- static synchronized native boolean canRead(String path);
-
- /*
- * This method does the actual check of whether or not a file is a
- * directory or not. It also handle the existence check to eliminate
- * the overhead of a call to exists()
- */
- static native boolean isDirectory(String dirpath);
-
- /**
- * This method returns an array of filesystem roots. Some operating systems
- * have volume oriented filesystem. This method provides a mechanism for
- * determining which volumes exist. GNU systems use a single hierarchical
- * filesystem, so will have only one "/" filesystem root.
- *
- * @return An array of <code>File</code> objects for each filesystem root
- * available.
- *
- * @since 1.2
- */
- static File[] listRoots()
- {
- File[] roots = new File[1];
- roots[0] = new File("/");
- return roots;
- }
-
- /**
- * This method tests whether or not this file represents a "hidden" file.
- * On GNU systems, a file is hidden if its name begins with a "."
- * character. Files with these names are traditionally not shown with
- * directory listing tools.
- *
- * @return <code>true</code> if the file is hidden, <code>false</code>
- * otherwise.
- *
- * @since 1.2
- */
- static boolean isHidden(String path)
- {
- // FIXME: this only works on UNIX
- return getName(path).startsWith(".");
- }
-
- /**
- * This method returns the name of the file. This is everything in the
- * complete path of the file after the last instance of the separator
- * string.
- *
- * @return The file name
- */
- static String getName(String path)
- {
- int pos = PlatformHelper.lastIndexOfSeparator(path);
- if (pos == -1)
- return path;
-
- if (PlatformHelper.endWithSeparator(path))
- return "";
-
- return path.substring(pos + File.separator.length());
- }
-
- /**
- * This method returns a canonical representation of the pathname of
- * this file. The actual form of the canonical representation is
- * system-dependent. On the GNU system, conversion to canonical
- * form involves the removal of redundant separators, references to
- * "." and "..", and symbolic links.
- * <p>
- * Note that this method, unlike the other methods which return path
- * names, can throw an IOException. This is because native method
- * might be required in order to resolve the canonical path
- *
- * @exception IOException If an error occurs
- */
- public static native String toCanonicalForm(String path) throws IOException;
-}