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// Tags: JDK1.1
// Copyright (C) 2005 Daniel Bonniot <bonniot@users.sf.net>
// This file is part of Mauve.
// Mauve is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// Mauve 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 for more details.
// You should have received a copy of the GNU General Public License
// along with Mauve; see the file COPYING. If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA. */
package gnu.testlet.java.io.Serializable;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
* Check when a parent readResolve() method should be used for subclasses.
*
* Here is the rationale for this test, based on Sun's javadoc for
* java.io.Serializable:
*
* First, readResolve must be declared with:
* ANY-ACCESS-MODIFIER Object readResolve() throws ObjectStreamException;
* Thus, a non-private readResolve is OK.
*
* Second, the rules for invoking readResolve (as for writeReplace) are that
* it must be called if it would be accessible from the class of the object
* being deserialized. So, a non-private readSolve method in the parent must
* be called, but a private one should not be.
*/
public class ParentReadResolve implements Testlet {
public void test(TestHarness harness)
{
try {
ByteArrayOutputStream outb = new ByteArrayOutputStream();
ObjectOutputStream outs = new ObjectOutputStream(outb);
outs.writeObject(MySingleton.instance);
outs.writeObject(new MyFoo());
byte[] store = outb.toByteArray();
ByteArrayInputStream inb = new ByteArrayInputStream(store);
ObjectInputStream ins = new ObjectInputStream(inb);
MySingleton x = (MySingleton) ins.readObject();
harness.check(x == MySingleton.instance);
MyFoo foo = (MyFoo) ins.readObject();
harness.check(! foo.resolved);
}
catch (Throwable e) {
harness.debug(e);
}
}
//// Singleton/MySingleton with a non-private readResolve ////
static abstract class Singleton implements java.io.Serializable
{
abstract Singleton getInstance();
/** NOTE: this readResolve is not private.
*/
Object readResolve() {
return getInstance();
}
}
static class MySingleton extends Singleton
{
static final MySingleton instance = new MySingleton();
Singleton getInstance() { return instance; }
}
//// Foo/MyFoo with a private readResolve ////
static abstract class Foo implements java.io.Serializable
{
boolean resolved = false;
/** NOTE: this readResolve is private.
*/
private Object readResolve() {
resolved = true;
return this;
}
}
static class MyFoo extends Foo
{
}
}
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