8067870: Fix java.io.ObjectInputStream.PeekInputStream#skip
Reviewed-by: rriggs, alanb
--- a/jdk/src/java.base/share/classes/java/io/ObjectInputStream.java Wed Dec 17 13:41:49 2014 -0800
+++ b/jdk/src/java.base/share/classes/java/io/ObjectInputStream.java Thu Dec 18 16:44:32 2014 +0000
@@ -2345,7 +2345,7 @@
skipped++;
n--;
}
- return skipped + skip(n);
+ return skipped + in.skip(n);
}
public int available() throws IOException {
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/io/ObjectInputStream/PeekInputStreamTest.java Thu Dec 18 16:44:32 2014 +0000
@@ -0,0 +1,91 @@
+/*
+ * 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.
+ *
+ * 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.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+
+/*
+ * @test
+ * @bug 8067870
+ * @summary verifies java.io.ObjectInputStream.PeekInputStream.skip works
+ * as intended
+ */
+public class PeekInputStreamTest {
+
+ public static void main(String[] args) throws ReflectiveOperationException,
+ IOException {
+
+ InputStream pin = createPeekInputStream(
+ new ByteArrayInputStream(new byte[]{1, 2, 3, 4}));
+ peek(pin);
+ if (pin.skip(1) != 1 || pin.read() != 2)
+ throw new AssertionError();
+
+ InputStream pin1 = createPeekInputStream(
+ new ByteArrayInputStream(new byte[]{1, 2, 3, 4}));
+ if (pin1.skip(1) != 1 || pin1.read() != 2)
+ throw new AssertionError();
+
+ InputStream pin2 = createPeekInputStream(
+ new ByteArrayInputStream(new byte[]{1, 2, 3, 4}));
+ if (pin2.skip(0) != 0 || pin2.read() != 1)
+ throw new AssertionError();
+
+ InputStream pin3 = createPeekInputStream(
+ new ByteArrayInputStream(new byte[]{1, 2, 3, 4}));
+ if (pin3.skip(2) != 2 || pin3.read() != 3)
+ throw new AssertionError();
+
+ InputStream pin4 = createPeekInputStream(
+ new ByteArrayInputStream(new byte[]{1, 2, 3, 4}));
+ if (pin4.skip(3) != 3 || pin4.read() != 4)
+ throw new AssertionError();
+
+ InputStream pin5 = createPeekInputStream(
+ new ByteArrayInputStream(new byte[]{1, 2, 3, 4}));
+ if (pin5.skip(16) != 4 || pin5.read() != -1)
+ throw new AssertionError();
+ }
+
+ private static InputStream createPeekInputStream(InputStream underlying)
+ throws ReflectiveOperationException {
+ Class<? extends InputStream> clazz =
+ Class.forName("java.io.ObjectInputStream$PeekInputStream")
+ .asSubclass(InputStream.class);
+
+ Constructor<? extends InputStream> ctr =
+ clazz.getDeclaredConstructor(InputStream.class);
+ ctr.setAccessible(true);
+ return ctr.newInstance(underlying);
+ }
+
+ private static void peek(InputStream pin)
+ throws ReflectiveOperationException {
+ Method p = pin.getClass().getDeclaredMethod("peek");
+ p.setAccessible(true);
+ p.invoke(pin);
+ }
+}