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111 lines
5.1 KiB
111 lines
5.1 KiB
/*
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* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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/**
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* Interfaces and classes providing access to file and file system attributes.
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*
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* <blockquote><table cellspacing=1 cellpadding=0 summary="Attribute views">
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* <tr><th align="left">Attribute views</th><th align="left">Description</th></tr>
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* <tr><td valign=top><tt><i>{@link java.nio.file.attribute.AttributeView}</i></tt></td>
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* <td>Can read or update non-opaque values associated with objects in a file system</td></tr>
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* <tr><td valign=top><tt> <i>{@link java.nio.file.attribute.FileAttributeView}</i></tt></td>
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* <td>Can read or update file attributes</td></tr>
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* <tr><td valign=top><tt> <i>{@link java.nio.file.attribute.BasicFileAttributeView} </i></tt></td>
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* <td>Can read or update a basic set of file attributes</td></tr>
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* <tr><td valign=top><tt> <i>{@link java.nio.file.attribute.PosixFileAttributeView} </i></tt></td>
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* <td>Can read or update POSIX defined file attributes</td></tr>
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* <tr><td valign=top><tt> <i>{@link java.nio.file.attribute.DosFileAttributeView} </i></tt></td>
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* <td>Can read or update FAT file attributes</td></tr>
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* <tr><td valign=top><tt> <i>{@link java.nio.file.attribute.FileOwnerAttributeView} </i></tt></td>
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* <td>Can read or update the owner of a file</td></tr>
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* <tr><td valign=top><tt> <i>{@link java.nio.file.attribute.AclFileAttributeView} </i></tt></td>
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* <td>Can read or update Access Control Lists</td></tr>
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* <tr><td valign=top><tt> <i>{@link java.nio.file.attribute.UserDefinedFileAttributeView} </i></tt></td>
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* <td>Can read or update user-defined file attributes</td></tr>
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* <tr><td valign=top><tt> <i>{@link java.nio.file.attribute.FileStoreAttributeView}</i></tt></td>
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* <td>Can read or update file system attributes</td></tr>
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* </table></blockquote>
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*
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* <p> An attribute view provides a read-only or updatable view of the non-opaque
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* values, or <em>metadata</em>, associated with objects in a file system.
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* The {@link java.nio.file.attribute.FileAttributeView} interface is
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* extended by several other interfaces that that views to specific sets of file
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* attributes. {@code FileAttributeViews} are selected by invoking the {@link
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* java.nio.file.Files#getFileAttributeView} method with a
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* <em>type-token</em> to identify the required view. Views can also be identified
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* by name. The {@link java.nio.file.attribute.FileStoreAttributeView} interface
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* provides access to file store attributes. A {@code FileStoreAttributeView} of
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* a given type is obtained by invoking the {@link
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* java.nio.file.FileStore#getFileStoreAttributeView} method.
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*
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* <p> The {@link java.nio.file.attribute.BasicFileAttributeView}
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* class defines methods to read and update a <em>basic</em> set of file
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* attributes that are common to many file systems.
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*
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* <p> The {@link java.nio.file.attribute.PosixFileAttributeView}
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* interface extends {@code BasicFileAttributeView} by defining methods
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* to access the file attributes commonly used by file systems and operating systems
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* that implement the Portable Operating System Interface (POSIX) family of
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* standards.
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*
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* <p> The {@link java.nio.file.attribute.DosFileAttributeView}
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* class extends {@code BasicFileAttributeView} by defining methods to
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* access the legacy "DOS" file attributes supported on file systems such as File
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* Allocation Tabl (FAT), commonly used in consumer devices.
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*
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* <p> The {@link java.nio.file.attribute.AclFileAttributeView}
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* class defines methods to read and write the Access Control List (ACL)
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* file attribute. The ACL model used by this file attribute view is based
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* on the model defined by <a href="http://www.ietf.org/rfc/rfc3530.txt">
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* <i>RFC 3530: Network File System (NFS) version 4 Protocol</i></a>.
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*
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* <p> In addition to attribute views, this package also defines classes and
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* interfaces that are used when accessing attributes:
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*
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* <ul>
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*
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* <li> The {@link java.nio.file.attribute.UserPrincipal} and
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* {@link java.nio.file.attribute.GroupPrincipal} interfaces represent an
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* identity or group identity. </li>
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*
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* <li> The {@link java.nio.file.attribute.UserPrincipalLookupService}
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* interface defines methods to lookup user or group principals. </li>
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*
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* <li> The {@link java.nio.file.attribute.FileAttribute} interface
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* represents the value of an attribute for cases where the attribute value is
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* required to be set atomically when creating an object in the file system. </li>
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*
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* </ul>
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*
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*
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* <p> Unless otherwise noted, passing a <tt>null</tt> argument to a constructor
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* or method in any class or interface in this package will cause a {@link
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* java.lang.NullPointerException NullPointerException} to be thrown.
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*
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* @since 1.7
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*/
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package java.nio.file.attribute;
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