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Java example source code file (TempFileHelper.java)
The TempFileHelper.java Java example source code/* * Copyright (c) 2009, 2013, 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 java.nio.file; import java.util.Set; import java.util.EnumSet; import java.security.SecureRandom; import static java.security.AccessController.*; import java.io.IOException; import java.nio.file.attribute.FileAttribute; import java.nio.file.attribute.PosixFilePermission; import java.nio.file.attribute.PosixFilePermissions; import static java.nio.file.attribute.PosixFilePermission.*; import sun.security.action.GetPropertyAction; /** * Helper class to support creation of temporary files and directories with * initial attributes. */ class TempFileHelper { private TempFileHelper() { } // temporary directory location private static final Path tmpdir = Paths.get(doPrivileged(new GetPropertyAction("java.io.tmpdir"))); private static final boolean isPosix = FileSystems.getDefault().supportedFileAttributeViews().contains("posix"); // file name generation, same as java.io.File for now private static final SecureRandom random = new SecureRandom(); private static Path generatePath(String prefix, String suffix, Path dir) { long n = random.nextLong(); n = (n == Long.MIN_VALUE) ? 0 : Math.abs(n); Path name = dir.getFileSystem().getPath(prefix + Long.toString(n) + suffix); // the generated name should be a simple file name if (name.getParent() != null) throw new IllegalArgumentException("Invalid prefix or suffix"); return dir.resolve(name); } // default file and directory permissions (lazily initialized) private static class PosixPermissions { static final FileAttribute<Set Other Java examples (source code examples)Here is a short list of links related to this Java TempFileHelper.java source code file: |
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