author | ohair |
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/* |
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* Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.nio.file.attribute; |
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import java.io.IOException; |
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/** |
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* A file attribute view that supports reading or updating the owner of a file. |
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* This file attribute view is intended for file system implementations that |
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* support a file attribute that represents an identity that is the owner of |
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* the file. Often the owner of a file is the identity of the entity that |
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* created the file. |
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* |
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* <p> The {@link #getOwner getOwner} or {@link #setOwner setOwner} methods may |
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* be used to read or update the owner of the file. |
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* |
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* <p> The {@link java.nio.file.Files#getAttribute getAttribute} and |
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* {@link java.nio.file.Files#setAttribute setAttribute} methods may also be |
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* used to read or update the owner. In that case, the owner attribute is |
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* identified by the name {@code "owner"}, and the value of the attribute is |
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* a {@link UserPrincipal}. |
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* |
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* @since 1.7 |
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*/ |
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public interface FileOwnerAttributeView |
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extends FileAttributeView |
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{ |
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/** |
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* Returns the name of the attribute view. Attribute views of this type |
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* have the name {@code "owner"}. |
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*/ |
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@Override |
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String name(); |
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/** |
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* Read the file owner. |
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* |
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* <p> It it implementation specific if the file owner can be a {@link |
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* GroupPrincipal group}. |
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* |
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* @return the file owner |
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* |
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* @throws IOException |
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* if an I/O error occurs |
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* @throws SecurityException |
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* In the case of the default provider, a security manager is |
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* installed, and it denies {@link |
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* RuntimePermission}<tt>("accessUserInformation")</tt> or its |
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* {@link SecurityManager#checkRead(String) checkRead} method |
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* denies read access to the file. |
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*/ |
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UserPrincipal getOwner() throws IOException; |
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/** |
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* Updates the file owner. |
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* |
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* <p> It it implementation specific if the file owner can be a {@link |
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* GroupPrincipal group}. To ensure consistent and correct behavior |
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* across platforms it is recommended that this method should only be used |
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* to set the file owner to a user principal that is not a group. |
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* |
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* @param owner |
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* the new file owner |
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* |
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* @throws IOException |
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* if an I/O error occurs, or the {@code owner} parameter is a |
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* group and this implementation does not support setting the owner |
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* to a group |
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* @throws SecurityException |
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* In the case of the default provider, a security manager is |
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* installed, and it denies {@link |
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* RuntimePermission}<tt>("accessUserInformation")</tt> or its |
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* {@link SecurityManager#checkWrite(String) checkWrite} method |
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* denies write access to the file. |
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*/ |
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void setOwner(UserPrincipal owner) throws IOException; |
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} |