| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * https://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package org.apache.tools.ant.types.selectors; |
| |
| import org.apache.tools.ant.BuildException; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.LinkOption; |
| import java.nio.file.attribute.GroupPrincipal; |
| import java.nio.file.attribute.PosixFileAttributes; |
| |
| /** |
| * A selector that selects files based on their POSIX group. |
| * |
| * <p>Group is defined in terms of {@link java.nio.file.Files#readAttributes} |
| * group attribute as provided by {@link java.nio.file.attribute.PosixFileAttributes}, |
| * this means the selector will accept any file that exists and has the given |
| * group attribute.</p> |
| * |
| * @since Ant 1.10.4 |
| */ |
| public class PosixGroupSelector implements FileSelector { |
| |
| private String group; |
| |
| private boolean followSymlinks = true; |
| |
| /** |
| * Sets the group name to look for. |
| * @param group the group name |
| */ |
| public void setGroup(String group) { |
| this.group = group; |
| } |
| |
| /** |
| * Sets the "follow symbolic links" option. |
| * @param followSymlinks whether or not symbolic links should be followed. |
| */ |
| public void setFollowSymlinks(boolean followSymlinks) { |
| this.followSymlinks = followSymlinks; |
| } |
| |
| @Override |
| public boolean isSelected(File basedir, String filename, File file) { |
| if (group == null) { |
| throw new BuildException("the group attribute is required"); |
| } |
| try { |
| GroupPrincipal actualGroup = followSymlinks ? Files.readAttributes(file.toPath(), |
| PosixFileAttributes.class).group() : Files.readAttributes(file.toPath(), |
| PosixFileAttributes.class, LinkOption.NOFOLLOW_LINKS).group(); |
| return actualGroup != null && actualGroup.getName().equals(group); |
| } catch (IOException e) { |
| // => not the expected group |
| } |
| return false; |
| } |
| } |