| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package jdk.internal.jrtfs; |
| |
| import java.nio.file.DirectoryStream; |
| import java.nio.file.ClosedDirectoryStreamException; |
| import java.nio.file.DirectoryIteratorException; |
| import java.nio.file.NotDirectoryException; |
| import java.nio.file.Path; |
| import java.util.Iterator; |
| import java.util.Objects; |
| import java.util.NoSuchElementException; |
| import java.io.IOException; |
| |
| /** |
| * DirectoryStream implementation for jrt file system implementations. |
| * |
| * @implNote This class needs to maintain JDK 8 source compatibility. |
| * |
| * It is used internally in the JDK to implement jimage/jrtfs access, |
| * but also compiled and delivered as part of the jrtfs.jar to support access |
| * to the jimage file provided by the shipped JDK by tools running on JDK 8. |
| */ |
| final class JrtDirectoryStream implements DirectoryStream<Path> { |
| |
| private final JrtPath dir; |
| private final DirectoryStream.Filter<? super Path> filter; |
| private boolean isClosed; |
| private Iterator<Path> itr; |
| |
| JrtDirectoryStream(JrtPath dir, |
| DirectoryStream.Filter<? super java.nio.file.Path> filter) |
| throws IOException |
| { |
| this.dir = dir; |
| if (!dir.jrtfs.isDirectory(dir, true)) { // sanity check |
| throw new NotDirectoryException(dir.toString()); |
| } |
| this.filter = filter; |
| } |
| |
| @Override |
| public synchronized Iterator<Path> iterator() { |
| if (isClosed) |
| throw new ClosedDirectoryStreamException(); |
| if (itr != null) |
| throw new IllegalStateException("Iterator has already been returned"); |
| try { |
| itr = dir.jrtfs.iteratorOf(dir, filter); |
| } catch (IOException e) { |
| throw new IllegalStateException(e); |
| } |
| return new Iterator<Path>() { |
| @Override |
| public boolean hasNext() { |
| synchronized (JrtDirectoryStream.this) { |
| if (isClosed) |
| return false; |
| return itr.hasNext(); |
| } |
| } |
| |
| @Override |
| public Path next() { |
| synchronized (JrtDirectoryStream.this) { |
| if (isClosed) |
| throw new NoSuchElementException(); |
| return itr.next(); |
| } |
| } |
| }; |
| } |
| |
| @Override |
| public synchronized void close() throws IOException { |
| isClosed = true; |
| } |
| } |