# HG changeset patch
# User bpb
# Date 1422651372 28800
# Node ID a75be4abe9cff2db06d54fbe8030c00d62ea262e
# Parent af951d0d26070c98cae0abf4b27b48052bef105a
6880737: (fs) FileLock constructors don't throw NPE if the channel argument is null
Summary: Throw IllegalArgumentException if the channel parameter is null
Reviewed-by: alanb
diff -r af951d0d2607 -r a75be4abe9cf jdk/src/java.base/share/classes/java/nio/channels/FileLock.java
--- a/jdk/src/java.base/share/classes/java/nio/channels/FileLock.java Fri Jan 30 10:23:45 2015 -0800
+++ b/jdk/src/java.base/share/classes/java/nio/channels/FileLock.java Fri Jan 30 12:56:12 2015 -0800
@@ -26,6 +26,7 @@
package java.nio.channels;
import java.io.IOException;
+import java.util.Objects;
/**
* A token representing a lock on a region of a file.
@@ -147,6 +148,7 @@
protected FileLock(FileChannel channel,
long position, long size, boolean shared)
{
+ Objects.requireNonNull(channel, "Null channel");
if (position < 0)
throw new IllegalArgumentException("Negative position");
if (size < 0)
@@ -185,6 +187,7 @@
protected FileLock(AsynchronousFileChannel channel,
long position, long size, boolean shared)
{
+ Objects.requireNonNull(channel, "Null channel");
if (position < 0)
throw new IllegalArgumentException("Negative position");
if (size < 0)
diff -r af951d0d2607 -r a75be4abe9cf jdk/test/java/nio/channels/FileLock/FileLockConstructor.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/nio/channels/FileLock/FileLockConstructor.java Fri Jan 30 12:56:12 2015 -0800
@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ * 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.
+ */
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.channels.AsynchronousFileChannel;
+import java.nio.channels.FileChannel;
+import java.nio.channels.FileLock;
+import java.nio.file.StandardOpenOption;
+
+/*
+ * @test
+ * @bug 6880737
+ * @summary Test FileLock constructor parameter validation.
+ */
+public class FileLockConstructor {
+ public static void main(String[] args) throws IOException {
+ FileLock fileLock = null;
+ int failures = 0;
+
+ // null FileChannel
+ boolean exceptionThrown = false;
+ try {
+ fileLock = new FileLockSub((FileChannel)null, 0, 0, false);
+ } catch (NullPointerException npe) {
+ exceptionThrown = true;
+ }
+ if (!exceptionThrown) {
+ System.err.println("FileLock constructor did not throw NPE for null FileChannel");
+ failures++;
+ }
+
+ // null AsynchronousFileChannel
+ exceptionThrown = false;
+ try {
+ fileLock = new FileLockSub((AsynchronousFileChannel)null, 0, 0, true);
+ } catch (NullPointerException npe) {
+ exceptionThrown = true;
+ }
+ if (!exceptionThrown) {
+ System.err.println("FileLock constructor did not throw NPE for null AsynchronousFileChannel");
+ failures++;
+ }
+
+ // create temporary file
+ File tmpFile = File.createTempFile("FileLock", "tmp");
+ tmpFile.deleteOnExit();
+
+ // position and size preconditions
+ long[][] posAndSize = new long[][] {
+ {0, 42}, // valid
+ {-1, 42}, // invalid: position < 0
+ {0, -1}, // invalid: size < 0
+ {Long.MAX_VALUE, 1} // invalid: position + size < 0
+ };
+
+ // test position and size preconditions for FileChannel case
+ try (FileChannel syncChannel = FileChannel.open(tmpFile.toPath(),
+ StandardOpenOption.READ, StandardOpenOption.WRITE)) {
+
+ for (int i = 0; i < posAndSize.length; i++) {
+ boolean preconditionsHold = i == 0;
+ exceptionThrown = false;
+ try {
+ fileLock = new FileLockSub(syncChannel, posAndSize[i][0],
+ posAndSize[i][1], true);
+ } catch (IllegalArgumentException iae) {
+ exceptionThrown = true;
+ } catch (Exception e) {
+ System.err.println("Unexpected exception \"" + e + "\" caught"
+ + " for position " + posAndSize[i][0] + " and size "
+ + posAndSize[i][1] + " for FileChannel variant");
+ failures++;
+ continue;
+ }
+ if (preconditionsHold && exceptionThrown) {
+ System.err.println("FileLock constructor incorrectly threw IAE"
+ + " for position " + posAndSize[i][0] + " and size "
+ + posAndSize[i][1] + " for FileChannel variant");
+ failures++;
+ } else if (!preconditionsHold && !exceptionThrown) {
+ System.err.println("FileLock constructor did not throw IAE"
+ + " for position " + posAndSize[i][0] + " and size "
+ + posAndSize[i][1] + " for FileChannel variant");
+ failures++;
+ }
+ }
+ }
+
+ // test position and size preconditions for AsynchronousFileChannel case
+ try (AsynchronousFileChannel asyncChannel
+ = AsynchronousFileChannel.open(tmpFile.toPath(),
+ StandardOpenOption.READ, StandardOpenOption.WRITE)) {
+ for (int i = 0; i < posAndSize.length; i++) {
+ boolean preconditionsHold = i == 0;
+ exceptionThrown = false;
+ try {
+ fileLock = new FileLockSub(asyncChannel, posAndSize[i][0],
+ posAndSize[i][1], true);
+ } catch (IllegalArgumentException iae) {
+ exceptionThrown = true;
+ } catch (Exception e) {
+ System.err.println("Unexpected exception \"" + e + "\" caught"
+ + " for position " + posAndSize[i][0] + " and size "
+ + posAndSize[i][1] + " for AsynchronousFileChannel variant");
+ failures++;
+ continue;
+ }
+ if (preconditionsHold && exceptionThrown) {
+ System.err.println("FileLock constructor incorrectly threw IAE"
+ + " for position " + posAndSize[i][0] + " and size "
+ + posAndSize[i][1] + " for AsynchronousFileChannel variant");
+ failures++;
+ } else if (!preconditionsHold && !exceptionThrown) {
+ System.err.println("FileLock constructor did not throw IAE"
+ + " for position " + posAndSize[i][0] + " and size "
+ + posAndSize[i][1] + " for AsynchronousFileChannel variant");
+ failures++;
+ }
+ }
+ }
+
+ if (failures > 0) {
+ throw new RuntimeException("Incurred " + failures +
+ " failures while testing FileLock.");
+ }
+ }
+}
+
+class FileLockSub extends FileLock {
+ FileLockSub(FileChannel channel, long position, long size, boolean shared) {
+ super(channel, position, size, shared);
+ }
+
+ FileLockSub(AsynchronousFileChannel channel, long position, long size,
+ boolean shared) {
+ super(channel, position, size, shared);
+ }
+
+ @Override
+ public boolean isValid() {
+ return false;
+ }
+
+ @Override
+ public void release() throws IOException {
+ // do nothing
+ }
+}