From ffde862e033a0825e1e9972a89c0f1f80b261a8e Mon Sep 17 00:00:00 2001 From: mark Date: Mon, 14 Aug 2006 23:12:35 +0000 Subject: 2006-08-14 Mark Wielaard Imported GNU Classpath 0.92 * HACKING: Add more importing hints. Update automake version requirement. * configure.ac (gconf-peer): New enable AC argument. Add --disable-gconf-peer and --enable-default-preferences-peer to classpath configure when gconf is disabled. * scripts/makemake.tcl: Set gnu/java/util/prefs/gconf and gnu/java/awt/dnd/peer/gtk to bc. Classify gnu/java/security/Configuration.java as generated source file. * gnu/java/lang/management/VMGarbageCollectorMXBeanImpl.java, gnu/java/lang/management/VMMemoryPoolMXBeanImpl.java, gnu/java/lang/management/VMClassLoadingMXBeanImpl.java, gnu/java/lang/management/VMRuntimeMXBeanImpl.java, gnu/java/lang/management/VMMemoryManagerMXBeanImpl.java, gnu/java/lang/management/VMThreadMXBeanImpl.java, gnu/java/lang/management/VMMemoryMXBeanImpl.java, gnu/java/lang/management/VMCompilationMXBeanImpl.java: New VM stub classes. * java/lang/management/VMManagementFactory.java: Likewise. * java/net/VMURLConnection.java: Likewise. * gnu/java/nio/VMChannel.java: Likewise. * java/lang/Thread.java (getState): Add stub implementation. * java/lang/Class.java (isEnum): Likewise. * java/lang/Class.h (isEnum): Likewise. * gnu/awt/xlib/XToolkit.java (getClasspathTextLayoutPeer): Removed. * javax/naming/spi/NamingManager.java: New override for StackWalker functionality. * configure, sources.am, Makefile.in, gcj/Makefile.in, include/Makefile.in, testsuite/Makefile.in: Regenerated. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@116139 138bc75d-0d04-0410-961f-82ee72b054a4 --- .../gnu/java/net/loader/FileURLLoader.java | 145 +++++++++++++++++++++ 1 file changed, 145 insertions(+) create mode 100644 libjava/classpath/gnu/java/net/loader/FileURLLoader.java (limited to 'libjava/classpath/gnu/java/net/loader/FileURLLoader.java') diff --git a/libjava/classpath/gnu/java/net/loader/FileURLLoader.java b/libjava/classpath/gnu/java/net/loader/FileURLLoader.java new file mode 100644 index 00000000000..39d33a4e4be --- /dev/null +++ b/libjava/classpath/gnu/java/net/loader/FileURLLoader.java @@ -0,0 +1,145 @@ +/* FileURLLoader.java -- a URLLoader for file URLs + Copyright (C) 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 gnu.java.net.loader; + + +import java.io.File; +import java.io.IOException; +import java.net.URL; +import java.net.URLClassLoader; +import java.net.URLStreamHandlerFactory; +import java.util.StringTokenizer; + +/** + * A FileURLLoader is a type of URLLoader + * only loading from file url. + */ +public final class FileURLLoader extends URLLoader +{ + File dir; //the file for this file url + + public FileURLLoader(URLClassLoader classloader, + URLStreamHandlerCache cache, + URLStreamHandlerFactory factory, + URL url, URL absoluteUrl) + { + super(classloader, cache, factory, url, absoluteUrl); + dir = new File(absoluteUrl.getFile()); + } + + /** get resource with the name "name" in the file url */ + public Resource getResource(String name) + { + try + { + // Make sure that all components in name are valid by walking through + // them + File file = walkPathComponents(name); + + if (file == null) + return null; + + return new FileResource(this, file); + } + catch (IOException e) + { + // Fall through... + } + return null; + } + + /** + * Walk all path tokens and check them for validity. At no moment, we are + * allowed to reach a directory located "above" the root directory, stored + * in "dir" property. We are also not allowed to enter a non existing + * directory or a non directory component (plain file, symbolic link, ...). + * An empty or null path is valid. Pathnames components are separated by + * File.separatorChar + * + * @param resourceFileName the name to be checked for validity. + * @return the canonical file pointed by the resourceFileName or null if the + * walking failed + * @throws IOException in case of issue when creating the canonical + * resulting file + * @see File#separatorChar + */ + private File walkPathComponents(String resourceFileName) throws IOException + { + StringTokenizer stringTokenizer = new StringTokenizer(resourceFileName, File.separator); + File currentFile = dir; + int tokenCount = stringTokenizer.countTokens(); + + for (int i = 0; i < tokenCount - 1; i++) + { + String currentToken = stringTokenizer.nextToken(); + + // If we are at the root directory and trying to go up, the walking is + // finished with an error + if ("..".equals(currentToken) && currentFile.equals(dir)) + return null; + + currentFile = new File(currentFile, currentToken); + + // If the current file doesn't exist or is not a directory, the walking is + // finished with an error + if (! (currentFile.exists() && currentFile.isDirectory())) + return null; + + } + + // Treat the last token differently, if it exists, because it does not need + // to be a directory + if (tokenCount > 0) + { + String currentToken = stringTokenizer.nextToken(); + + if ("..".equals(currentToken) && currentFile.equals(dir)) + return null; + + currentFile = new File(currentFile, currentToken); + + // If the current file doesn't exist, the walking is + // finished with an error + if (! currentFile.exists()) + return null; + } + + return currentFile.getCanonicalFile(); + } +} \ No newline at end of file -- cgit v1.2.3