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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
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 * 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).
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package jdk.nio.zipfs;

import java.io.IOException;
import java.nio.file.ClosedDirectoryStreamException;
import java.nio.file.DirectoryStream;
import java.nio.file.NotDirectoryException;
import java.nio.file.Path;
import java.util.Iterator;
import java.util.NoSuchElementException;

Author:Xueming Shen, Rajendra Gutupalli, Jaya Hangal
/** * * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal */
class ZipDirectoryStream implements DirectoryStream<Path> { private final ZipFileSystem zipfs; private final ZipPath dir; private final DirectoryStream.Filter<? super Path> filter; private volatile boolean isClosed; private volatile Iterator<Path> itr; ZipDirectoryStream(ZipPath dir, DirectoryStream.Filter<? super java.nio.file.Path> filter) throws IOException { this.zipfs = dir.getFileSystem(); this.dir = dir; this.filter = filter; // sanity check if (!zipfs.isDirectory(dir.getResolvedPath())) throw new NotDirectoryException(dir.toString()); } @Override public synchronized Iterator<Path> iterator() { if (isClosed) throw new ClosedDirectoryStreamException(); if (itr != null) throw new IllegalStateException("Iterator has already been returned"); try { itr = zipfs.iteratorOf(dir, filter); } catch (IOException e) { throw new IllegalStateException(e); } return new Iterator<Path>() { @Override public boolean hasNext() { if (isClosed) return false; return itr.hasNext(); } @Override public synchronized Path next() { if (isClosed) throw new NoSuchElementException(); return itr.next(); } @Override public void remove() { throw new UnsupportedOperationException(); } }; } @Override public synchronized void close() throws IOException { isClosed = true; } }