5021N/A * Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved. 893N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 893N/A * This code is free software; you can redistribute it and/or modify it 893N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 893N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 893N/A * This code is distributed in the hope that it will be useful, but WITHOUT 893N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 893N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 893N/A * version 2 for more details (a copy is included in the LICENSE file that 893N/A * accompanied this code). 893N/A * You should have received a copy of the GNU General Public License version 893N/A * 2 along with this work; if not, write to the Free Software Foundation, 893N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2362N/A * or visit www.oracle.com if you need additional information or have any 893N/A * Simple file tree walker that works in a similar manner to nftw(3C). 893N/A * @see Files#walkFileTree 2826N/A // will throw NPE if options contains null 893N/A * Walk file tree starting at the given file 907N/A * the directory to visit 893N/A * use when cycle detection is enabled 907N/A // if attributes are cached then use them if possible 893N/A // attempt to get attributes of file. If fails and we are following 893N/A // links then a link target might not exist so get attributes of link 1658N/A // If access to starting file is denied then SecurityException 1658N/A // is thrown, otherwise the file is ignored. 893N/A // unable to get attributes of file 2826N/A // at maximum depth or file is not a directory 2826N/A // check for cycles when following links 893N/A // if this directory and ancestor has a file key then we compare 893N/A // them; otherwise we use less efficient isSameFile test. 893N/A // the exception notified to the postVisitDirectory method 893N/A // invoke preVisitDirectory and then visit each entry 893N/A // returning null will cause NPE to be thrown 893N/A // skip remaining siblings in this directory 2826N/A // IOException will be notified to postVisitDirectory 3471N/A // IOException will be notified to postVisitDirectory 893N/A // invoke postVisitDirectory last 893N/A // remove key from trail if doing cycle detection