PosixFileAttributes.java

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 * accompanied this code).
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package java.nio.file.attribute;

import java.util.Set;

/**
 * File attributes associated with files on file systems used by operating systems
 * that implement the Portable Operating System Interface (POSIX) family of
 * standards.
 *
 * <p> The POSIX attributes of a file are retrieved using a {@link
 * PosixFileAttributeView} by invoking its {@link
 * PosixFileAttributeView#readAttributes readAttributes} method.
 *
 * @since 1.7
 */
/*
 * 基于POSIX标准的操作系统平台中的文件属性
 *
 * windows平台上没有实现该接口，而linux/mac系统上实现了该接口。
 */
public interface PosixFileAttributes extends BasicFileAttributes {
    
    /**
     * Returns the owner of the file.
     *
     * @return the file owner
     *
     * @see PosixFileAttributeView#setOwner
     */
    // 返回文件的所有者信息
    UserPrincipal owner();
    
    /**
     * Returns the group owner of the file.
     *
     * @return the file group owner
     *
     * @see PosixFileAttributeView#setGroup
     */
    // 返回文件的用户组信息
    GroupPrincipal group();
    
    /**
     * Returns the permissions of the file. The file permissions are returned
     * as a set of {@link PosixFilePermission} elements. The returned set is a
     * copy of the file permissions and is modifiable. This allows the result
     * to be modified and passed to the {@link PosixFileAttributeView#setPermissions
     * setPermissions} method to update the file's permissions.
     *
     * @return the file permissions
     *
     * @see PosixFileAttributeView#setPermissions
     */
    // 返回文件的权限信息
    Set<PosixFilePermission> permissions();
    
}