jdk/src/share/classes/jdk/nio/zipfs/ZipDirectoryStream.java
changeset 23925 0d5f2d863262
parent 10292 ed7db6a12c2a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/jdk/nio/zipfs/ZipDirectoryStream.java	Tue Apr 15 13:17:05 2014 -0700
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2009, 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.nio.zipfs;
+
+import java.nio.file.DirectoryStream;
+import java.nio.file.ClosedDirectoryStreamException;
+import java.nio.file.NotDirectoryException;
+import java.nio.file.Path;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+import java.io.IOException;
+
+/**
+ *
+ * @author  Xueming Shen, Rajendra Gutupalli, Jaya Hangal
+ */
+
+class ZipDirectoryStream implements DirectoryStream<Path> {
+
+    private final ZipFileSystem zipfs;
+    private final byte[] path;
+    private final DirectoryStream.Filter<? super Path> filter;
+    private volatile boolean isClosed;
+    private volatile Iterator<Path> itr;
+
+    ZipDirectoryStream(ZipPath zipPath,
+                       DirectoryStream.Filter<? super java.nio.file.Path> filter)
+        throws IOException
+    {
+        this.zipfs = zipPath.getFileSystem();
+        this.path = zipPath.getResolvedPath();
+        this.filter = filter;
+        // sanity check
+        if (!zipfs.isDirectory(path))
+            throw new NotDirectoryException(zipPath.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(path, filter);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+        return new Iterator<Path>() {
+            private Path next;
+            @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;
+    }
+
+
+}