[libbluray-devel] Add support for relative paths to File.exists()
hpi1
git at videolan.org
Mon Jan 20 14:39:41 CET 2014
libbluray | branch: master | hpi1 <hpi1 at anonymous.org> | Mon Jan 20 15:04:19 2014 +0200| [11c40410cb4dbf0505dff826e748e2b7c13ea4eb] | committer: hpi1
Add support for relative paths to File.exists()
(files inside Xlet-specific home directory).
> http://git.videolan.org/gitweb.cgi/libbluray.git/?a=commit;h=11c40410cb4dbf0505dff826e748e2b7c13ea4eb
---
.../bdj/java-j2me/java/io/BDFileSystemImpl.java | 36 ++++
.../bdj/java-j2se/java/io/BDFileSystemImpl.java | 41 +++++
src/libbluray/bdj/java/java/io/BDFileSystem.java | 190 ++++++++++++++++++++
.../bdj/java/org/videolan/BDJClassLoader.java | 12 ++
4 files changed, 279 insertions(+)
diff --git a/src/libbluray/bdj/java-j2me/java/io/BDFileSystemImpl.java b/src/libbluray/bdj/java-j2me/java/io/BDFileSystemImpl.java
new file mode 100644
index 0000000..e0b19d2
--- /dev/null
+++ b/src/libbluray/bdj/java-j2me/java/io/BDFileSystemImpl.java
@@ -0,0 +1,36 @@
+/*
+ * This file is part of libbluray
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+package java.io;
+
+class BDFileSystemImpl extends BDFileSystem {
+
+ public BDFileSystemImpl(FileSystem fs) {
+ super(fs);
+ }
+
+ /* Different in SE */
+ public boolean checkAccess(File f, boolean write) {
+ return fs.checkAccess(f, write);
+ }
+
+ /* Not in SE */
+ public boolean deleteOnExit(File f) {
+ return fs.deleteOnExit(f);
+ }
+}
diff --git a/src/libbluray/bdj/java-j2se/java/io/BDFileSystemImpl.java b/src/libbluray/bdj/java-j2se/java/io/BDFileSystemImpl.java
new file mode 100644
index 0000000..2ea362f
--- /dev/null
+++ b/src/libbluray/bdj/java-j2se/java/io/BDFileSystemImpl.java
@@ -0,0 +1,41 @@
+/*
+ * This file is part of libbluray
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+package java.io;
+
+class BDFileSystemImpl extends BDFileSystem {
+
+ public BDFileSystemImpl(FileSystem fs) {
+ super(fs);
+ }
+
+ /* different in ME */
+ public boolean checkAccess(File f, int access) {
+ return fs.checkAccess(f, access);
+ }
+
+ /* Not in ME */
+ public boolean setPermission(File f, int access, boolean enable, boolean owneronly) {
+ return fs.setPermission(f, access, enable, owneronly);
+ }
+
+ /* Not in ME */
+ public long getSpace(File f, int t) {
+ return fs.getSpace(f, t);
+ }
+}
diff --git a/src/libbluray/bdj/java/java/io/BDFileSystem.java b/src/libbluray/bdj/java/java/io/BDFileSystem.java
new file mode 100644
index 0000000..2cac57f
--- /dev/null
+++ b/src/libbluray/bdj/java/java/io/BDFileSystem.java
@@ -0,0 +1,190 @@
+/*
+ * This file is part of libbluray
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Wrapper for java.io.FileSystem class.
+ *
+ * - replace getBooleanAttributes() for relative paths.
+ * Pretend files exist, if those are in xlet home directory (inside .jar).
+ * No other relative paths are allowed.
+ */
+
+package java.io;
+
+import java.lang.reflect.Field;
+import java.net.URL;
+
+import org.videolan.BDJXletContext;
+
+public abstract class BDFileSystem extends FileSystem {
+
+ protected final FileSystem fs;
+
+ public static void init(Class c) {
+ Field filesystem;
+ try {
+ filesystem = c.getDeclaredField("fs");
+ filesystem.setAccessible(true);
+
+ FileSystem fs = (FileSystem)filesystem.get(null);
+ if (fs instanceof BDFileSystemImpl) {
+ //System.err.print("FileSystem already wrapped");
+ } else {
+ filesystem.set(null, new BDFileSystemImpl(fs));
+ }
+ } catch (Throwable t) {
+ System.err.print("Hooking FileSystem class failed: " + t);
+ }
+ }
+
+ public BDFileSystem(FileSystem fs) {
+ this.fs = fs;
+ }
+
+ public char getSeparator() {
+ return fs.getSeparator();
+ }
+
+ public char getPathSeparator() {
+ return fs.getPathSeparator();
+ }
+
+ public String normalize(String pathname) {
+ return fs.normalize(pathname);
+ }
+
+ public int prefixLength(String pathname) {
+ return fs.prefixLength(pathname);
+ }
+
+ public String resolve(String parent, String child) {
+ return fs.resolve(parent, child);
+ }
+
+ public String getDefaultParent() {
+ return fs.getDefaultParent();
+ }
+
+ public String fromURIPath(String path) {
+ return fs.fromURIPath(path);
+ }
+
+ public boolean isAbsolute(File f) {
+ return fs.isAbsolute(f);
+ }
+
+ public String resolve(File f) {
+ if (!f.isAbsolute()) {
+ System.err.println("***** resolve " + f);
+ }
+ return fs.resolve(f);
+ }
+
+ public String canonicalize(String path) throws IOException {
+ return fs.canonicalize(path);
+ }
+
+ public int getBooleanAttributes(File f) {
+ if (f.isAbsolute()) {
+ return fs.getBooleanAttributes(f);
+ }
+
+ /* try to locate file in Xlet home directory (inside JAR file) */
+ URL url = BDJXletContext.getCurrentResource(f.getPath());
+ if (url == null) {
+ return 0;
+ }
+
+ org.videolan.Logger.getLogger("BDFileSystem").info("Relative path " + f.getPath() + " translated to " + url);
+
+ return FileSystem.BA_EXISTS; //|BA_REGULAR
+ }
+
+ /*
+ ME: public abstract boolean checkAccess(File f, boolean write);
+ SE: public abstract boolean checkAccess(File f, int access);
+ */
+
+ public long getLastModifiedTime(File f) {
+ return fs.getLastModifiedTime(f);
+ }
+
+ public long getLength(File f) {
+ return fs.getLength(f);
+ }
+
+ /*
+ SE only
+ public abstract boolean setPermission(File f, int access, boolean enable, boolean owneronly);
+ */
+
+ public boolean createFileExclusively(String path) throws IOException {
+ return fs.createFileExclusively(path);
+ }
+
+ /*
+ ME only
+ public abstract boolean deleteOnExit(File f);
+ */
+
+ /*
+ SE only
+ public abstract long getSpace(File f, int t);
+ */
+
+ public boolean delete(File f) {
+ return fs.delete(f);
+ }
+
+ public String[] list(File f) {
+ return fs.list(f);
+ }
+
+ public boolean createDirectory(File f) {
+ return fs.createDirectory(f);
+ }
+
+ public boolean rename(File f1, File f2) {
+ return fs.rename(f1, f2);
+ }
+
+ public boolean setLastModifiedTime(File f, long time) {
+ return fs.setLastModifiedTime(f, time);
+ }
+
+ public boolean setReadOnly(File f) {
+ return fs.setReadOnly(f);
+ }
+
+ public File[] listRoots() {
+ return fs.listRoots();
+ }
+
+ /*
+ SE only
+ public abstract long getSpace(File f, int t);
+ */
+
+ public int compare(File f1, File f2) {
+ return fs.compare(f1, f2);
+ }
+
+ public int hashCode(File f) {
+ return fs.hashCode(f);
+ }
+}
diff --git a/src/libbluray/bdj/java/org/videolan/BDJClassLoader.java b/src/libbluray/bdj/java/org/videolan/BDJClassLoader.java
index f898cb9..e7385aa 100644
--- a/src/libbluray/bdj/java/org/videolan/BDJClassLoader.java
+++ b/src/libbluray/bdj/java/org/videolan/BDJClassLoader.java
@@ -110,5 +110,17 @@ public class BDJClassLoader extends URLClassLoader {
this.xletClass = xletClass;
}
+ public Class loadClass(String name) throws java.lang.ClassNotFoundException {
+ /* hook FileSystem in java.io.File */
+ if (name.equals("java.io.File")) {
+ Class c = super.loadClass(name);
+ if (c != null) {
+ java.io.BDFileSystem.init(c);
+ }
+ return c;
+ }
+ return super.loadClass(name);
+ }
+
private String xletClass;
}
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