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/*
* Copyright (c) 2019, 2020, 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.
*/
/*
* @test
* @bug 8246774
* @summary Checks that the appropriate default value is given to the canonical ctr
* @run testng AbsentStreamValuesTest
* @run testng/othervm/java.security.policy=empty_security.policy AbsentStreamValuesTest
*/
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import static java.io.ObjectStreamConstants.*;
import static java.lang.System.out;
import static org.testng.Assert.*;
/**
* Basic test to check that default primitive / reference values are presented
* to the record's canonical constructor, for fields not in the stream.
*/
public class AbsentStreamValuesTest {
record R01(boolean x) implements Serializable { }
record R02(byte x) implements Serializable { }
record R03(short x) implements Serializable { }
record R04(char x) implements Serializable { }
record R05(int x) implements Serializable { }
record R06(long x) implements Serializable { }
record R07(float x) implements Serializable { }
record R08(double x) implements Serializable { }
record R09(Object x) implements Serializable { }
record R10(String x) implements Serializable { }
record R11(int[] x) implements Serializable { }
record R12(Object[] x) implements Serializable { }
record R13(R12 x) implements Serializable { }
record R14(R13[] x) implements Serializable { }
@DataProvider(name = "recordTypeAndExpectedValue")
public Object[][] recordTypeAndExpectedValue() {
return new Object[][] {
new Object[] { R01.class, false },
new Object[] { R02.class, (byte)0 },
new Object[] { R03.class, (short)0 },
new Object[] { R04.class, '\u0000' },
new Object[] { R05.class, 0 },
new Object[] { R06.class, 0L },
new Object[] { R07.class, 0.0f },
new Object[] { R08.class, 0.0d },
new Object[] { R09.class, null },
new Object[] { R10.class, null },
new Object[] { R11.class, null },
new Object[] { R12.class, null },
new Object[] { R13.class, null },
new Object[] { R14.class, null },
};
}
@Test(dataProvider = "recordTypeAndExpectedValue")
public void testWithDifferentTypes(Class<?> clazz, Object expectedXValue)
throws Exception
{
out.println("\n---");
assert clazz.isRecord();
byte[] bytes = minimalByteStreamFor(clazz.getName());
Object obj = deserialize(bytes);
out.println("deserialized: " + obj);
Object actualXValue = clazz.getDeclaredMethod("x").invoke(obj);
assertEquals(actualXValue, expectedXValue);
}
// --- all together
record R15(boolean a, byte b, short c, char d, int e, long f, float g, double h, Object i, String j, long[] k, Object[] l)
implements Serializable { }
@Test
public void testWithAllTogether() throws Exception {
out.println("\n---");
byte[] bytes = minimalByteStreamFor(R15.class.getName());
R15 obj = (R15)deserialize(bytes);
out.println("deserialized: " + obj);
assertEquals(obj.a, false);
assertEquals(obj.b, 0);
assertEquals(obj.c, 0);
assertEquals(obj.d, '\u0000');
assertEquals(obj.e, 0);
assertEquals(obj.f, 0l);
assertEquals(obj.g, 0f);
assertEquals(obj.h, 0d);
assertEquals(obj.i, null);
assertEquals(obj.j, null);
assertEquals(obj.k, null);
assertEquals(obj.l, null);
}
// --- generic type
record R16<T, U>(T t, U u) implements Serializable { }
@Test
public void testGenericType() throws Exception {
out.println("\n---");
byte[] bytes = minimalByteStreamFor(R16.class.getName());
R16 obj = (R16)deserialize(bytes);
out.println("deserialized: " + obj);
assertEquals(obj.t, null);
assertEquals(obj.u, null);
}
// --- infra
/**
* Returns the serial bytes for the given class name. The stream
* will have no stream field values.
*/
static byte[] minimalByteStreamFor(String className) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(baos);
dos.writeShort(STREAM_MAGIC);
dos.writeShort(STREAM_VERSION);
dos.writeByte(TC_OBJECT);
dos.writeByte(TC_CLASSDESC);
dos.writeUTF(className);
dos.writeLong(0L);
dos.writeByte(SC_SERIALIZABLE);
dos.writeShort(0); // number of fields
dos.writeByte(TC_ENDBLOCKDATA); // no annotations
dos.writeByte(TC_NULL); // no superclasses
dos.close();
return baos.toByteArray();
}
@SuppressWarnings("unchecked")
static <T> T deserialize(byte[] streamBytes)
throws IOException, ClassNotFoundException
{
ByteArrayInputStream bais = new ByteArrayInputStream(streamBytes);
ObjectInputStream ois = new ObjectInputStream(bais);
return (T) ois.readObject();
}
}
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