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+/* DeleteFileHelper.java -- Helper class to delete files on VM exit
+ Copyright (C) 2004 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 java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.ArrayList;
+import java.util.Iterator;
+
+/**
+ * @author Guilhem Lavaux (guilhem@kaffe.org)
+ * @author Jeroen Frijters (jeroen@sumatra.nl)
+ * @author Michael Koch (konqueror@gmx.de)
+ */
+final class DeleteFileHelper extends Thread
+{
+ private static ArrayList filesToDelete;
+
+ static synchronized void add(File file)
+ {
+ if (filesToDelete == null)
+ {
+ filesToDelete = new ArrayList();
+
+ AccessController.doPrivileged(new PrivilegedAction()
+ {
+ public Object run()
+ {
+ try
+ {
+ Runtime.getRuntime().addShutdownHook(new DeleteFileHelper());
+ }
+ catch (IllegalStateException e)
+ {
+ // Shutdown is already in progress, so we can't
+ // register ours.
+ }
+
+ return null;
+ }
+ });
+ }
+
+ filesToDelete.add(file);
+ }
+
+ private static synchronized void deleteFiles()
+ {
+ Iterator it = filesToDelete.iterator();
+
+ while (it.hasNext())
+ {
+ try
+ {
+ File file = (File) it.next();
+ file.delete();
+ }
+ catch (Exception e)
+ {
+ // Do nothing here.
+ }
+ }
+ }
+
+ // Package-private to avoid a trampoline constructor.
+ DeleteFileHelper()
+ {
+ }
+
+ public void run()
+ {
+ deleteFiles();
+ }
+}