| /* |
| * Copyright (c) 2007, 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 |
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| */ |
| |
| /** |
| * Defines interfaces and classes for the Java virtual machine to access files, |
| * file attributes, and file systems. |
| * |
| * <p> The java.nio.file package defines classes to access files and file |
| * systems. The API to access file and file system attributes is defined in the |
| * {@link java.nio.file.attribute} package. The {@link java.nio.file.spi} |
| * package is used by service provider implementors wishing to extend the |
| * platform default provider, or to construct other provider implementations. </p> |
| * |
| * <h3><a name="links">Symbolic Links</a></h3> |
| * <p> Many operating systems and file systems support for <em>symbolic links</em>. |
| * A symbolic link is a special file that serves as a reference to another file. |
| * For the most part, symbolic links are transparent to applications and |
| * operations on symbolic links are automatically redirected to the <em>target</em> |
| * of the link. Exceptions to this are when a symbolic link is deleted or |
| * renamed/moved in which case the link is deleted or removed rather than the |
| * target of the link. This package includes support for symbolic links where |
| * implementations provide these semantics. File systems may support other types |
| * that are semantically close but support for these other types of links is |
| * not included in this package. </p> |
| * |
| * <h3><a name="interop">Interoperability</a></h3> |
| * <p> The {@link java.io.File} class defines the {@link java.io.File#toPath |
| * toPath} method to construct a {@link java.nio.file.Path} by converting |
| * the abstract path represented by the {@code java.io.File} object. The resulting |
| * {@code Path} can be used to operate on the same file as the {@code File} |
| * object. The {@code Path} specification provides further information |
| * on the <a href="Path.html#interop">interoperability</a> between {@code Path} |
| * and {@code java.io.File} objects. </p> |
| * |
| * <h3>Visibility</h3> |
| * <p> The view of the files and file system provided by classes in this package are |
| * guaranteed to be consistent with other views provided by other instances in the |
| * same Java virtual machine. The view may or may not, however, be consistent with |
| * the view of the file system as seen by other concurrently running programs due |
| * to caching performed by the underlying operating system and delays induced by |
| * network-filesystem protocols. This is true regardless of the language in which |
| * these other programs are written, and whether they are running on the same machine |
| * or on some other machine. The exact nature of any such inconsistencies are |
| * system-dependent and are therefore unspecified. </p> |
| * |
| * <h3><a name="integrity">Synchronized I/O File Integrity</a></h3> |
| * <p> The {@link java.nio.file.StandardOpenOption#SYNC SYNC} and {@link |
| * java.nio.file.StandardOpenOption#DSYNC DSYNC} options are used when opening a file |
| * to require that updates to the file are written synchronously to the underlying |
| * storage device. In the case of the default provider, and the file resides on |
| * a local storage device, and the {@link java.nio.channels.SeekableByteChannel |
| * seekable} channel is connected to a file that was opened with one of these |
| * options, then an invocation of the {@link |
| * java.nio.channels.WritableByteChannel#write(java.nio.ByteBuffer) write} |
| * method is only guaranteed to return when all changes made to the file |
| * by that invocation have been written to the device. These options are useful |
| * for ensuring that critical information is not lost in the event of a system |
| * crash. If the file does not reside on a local device then no such guarantee |
| * is made. Whether this guarantee is possible with other {@link |
| * java.nio.file.spi.FileSystemProvider provider} implementations is provider |
| * specific. </p> |
| * |
| * <h3>General Exceptions</h3> |
| * <p> Unless otherwise noted, passing a {@code null} argument to a constructor |
| * or method of any class or interface in this package will cause a {@link |
| * java.lang.NullPointerException NullPointerException} to be thrown. Additionally, |
| * invoking a method with an array or collection containing a {@code null} element |
| * will cause a {@code NullPointerException}, unless otherwise specified. </p> |
| * |
| * <p> Unless otherwise noted, methods that attempt to access the file system |
| * will throw {@link java.nio.file.ClosedFileSystemException} when invoked on |
| * objects associated with a {@link java.nio.file.FileSystem} that has been |
| * {@link java.nio.file.FileSystem#close closed}. Additionally, any methods |
| * that attempt write access to a file system will throw {@link |
| * java.nio.file.ReadOnlyFileSystemException} when invoked on an object associated |
| * with a {@link java.nio.file.FileSystem} that only provides read-only |
| * access. </p> |
| * |
| * <p> Unless otherwise noted, invoking a method of any class or interface in |
| * this package created by one {@link java.nio.file.spi.FileSystemProvider |
| * provider} with a parameter that is an object created by another provider, |
| * will throw {@link java.nio.file.ProviderMismatchException}. </p> |
| * |
| * <h3>Optional Specific Exceptions</h3> |
| * Most of the methods defined by classes in this package that access the |
| * file system specify that {@link java.io.IOException} be thrown when an I/O |
| * error occurs. In some cases, these methods define specific I/O exceptions |
| * for common cases. These exceptions, noted as <i>optional specific exceptions</i>, |
| * are thrown by the implementation where it can detect the specific error. |
| * Where the specific error cannot be detected then the more general {@code |
| * IOException} is thrown. |
| * |
| * @since 1.7 |
| */ |
| package java.nio.file; |
