* <td> {@link FileTime}
* </tr>
* <tr>
* <td> "lastAccessTime"
* <td> {@link FileTime}
* </tr>
* <tr>
* <td> "creationTime"
* <td> {@link FileTime}
* </tr>
* <tr>
* <td> "size"
* <td> {@link Long}
* </tr>
* <tr>
* <td> "isRegularFile"
* <td> {@link Boolean}
* </tr>
* <tr>
* <td> "isDirectory"
* <td> {@link Boolean}
* </tr>
* <tr>
* <td> "isSymbolicLink"
* <td> {@link Boolean}
* </tr>
* <tr>
* <td> "isOther"
* <td> {@link Boolean}
* </tr>
* <tr>
* <td> "fileKey"
* <td> {@link Object}
* </tr>
* </table>
* </blockquote>
*
* <p> The {@link java.nio.file.Files#getAttribute getAttribute} method may be
* used to read any of these attributes as if by invoking the {@link
* #readAttributes() readAttributes()} method.
*
* <p> The {@link java.nio.file.Files#setAttribute setAttribute} method may be
* used to update the file's last modified time, last access time or create time
* attributes as if by invoking the {@link #setTimes setTimes} method.
*
* @since 1.7
*/
public interface BasicFileAttributeView
extends FileAttributeView
{
/**
* Returns the name of the attribute view. Attribute views of this type
* have the name {@code "basic"}.
*/
@Override
String name();
/**
* Reads the basic file attributes as a bulk operation.
*
* <p> It is implementation specific if all file attributes are read as an
* atomic operation with respect to other file system operations.
*
* @return the file attributes
*
* @throws IOException
* if an I/O error occurs
* @throws SecurityException
* In the case of the default provider, a security manager is
* installed, its {@link SecurityManager#checkRead(String) checkRead}
* method is invoked to check read access to the file
*/
BasicFileAttributes readAttributes() throws IOException;
/**
* Updates any or all of the file's last modified time, last access time,
* and create time attributes.
*
* <p> This method updates the file's timestamp attributes. The values are
* converted to the epoch and precision supported by the file system.
* Converting from finer to coarser granularities result in precision loss.
* The behavior of this method when attempting to set a timestamp that is
* not supported or to a value that is outside the range supported by the
* underlying file store is not defined. It may or not fail by throwing an
* {@code IOException}.
*
* <p> If any of the {@code lastModifiedTime}, {@code lastAccessTime},
* or {@code createTime} parameters has the value {@code null} then the
* corresponding timestamp is not changed. An implementation may require to
* read the existing values of the file attributes when only some, but not
* all, of the timestamp attributes are updated. Consequently, this method
* may not be an atomic operation with respect to other file system
* operations. Reading and re-writing existing values may also result in
* precision loss. If all of the {@code lastModifiedTime}, {@code
* lastAccessTime} and {@code createTime} parameters are {@code null} then
* this method has no effect.
*
* <p>
Usage Example:
* Suppose we want to change a file's last access time.
* <pre>
* Path path = ...
* FileTime time = ...
* Files.getFileAttributeView(path, BasicFileAttributeView.class).setTimes(null, time, null);
* </pre>
*
* @param lastModifiedTime
* the new last modified time, or {@code null} to not change the
* value
* @param lastAccessTime
* the last access time, or {@code null} to not change the value
* @param createTime
* the file's create time, or {@code null} to not change the value
*
* @throws IOException
* if an I/O error occurs
* @throws SecurityException
* In the case of the default provider, a security manager is
* installed, its {@link SecurityManager#checkWrite(String) checkWrite}
* method is invoked to check write access to the file
*
* @see java.nio.file.Files#setLastModifiedTime
*/
void setTimes(FileTime lastModifiedTime,
FileTime lastAccessTime,
FileTime createTime) throws IOException;
}
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The BasicFileAttributeView.java Java example source code
/*
* 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.nio.file.attribute;
import java.io.IOException;
/**
* A file attribute view that provides a view of a <em>basic set of file
* attributes common to many file systems. The basic set of file attributes
* consist of <em>mandatory and optional file attributes as
* defined by the {@link BasicFileAttributes} interface.
* <p> The file attributes are retrieved from the file system as a bulk
* operation</em> by invoking the {@link #readAttributes() readAttributes} method.
* This class also defines the {@link #setTimes setTimes} method to update the
* file's time attributes.
*
* <p> Where dynamic access to file attributes is required, the attributes
* supported by this attribute view have the following names and types:
* <blockquote>
* <table border="1" cellpadding="8" summary="Supported attributes">
* <tr>
* <th> Name
* <th> Type
* </tr>
* <tr>
* <td> "lastModifiedTime" |
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