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// Tags: JDK1.2
// Copyright (C) 2005 Free Software Foundation
// 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.ObjectInputStream;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.io.*;
import java.lang.reflect.*;
/**
* This test checks that ObjectInputStream.readObject() resolves objects
* in the stream using the correct ClassLoader, based on the context it is
* called from.
*/
public class ClassLoaderTest implements Testlet
{
static class MyClassLoader extends ClassLoader
{
public Class defineClass(InputStream is, String name)
throws ClassNotFoundException, IOException
{
ByteArrayOutputStream os = new ByteArrayOutputStream();
byte[] buf = new byte[512];
int len, written;
while (true)
{
len = is.read(buf, 0, buf.length);
if (len == -1)
break;
written = 0;
while (written < len)
{
os.write(buf, written, len - written);
written += len;
}
}
byte[] classData = os.toByteArray();
return defineClass(name, classData, 0, classData.length);
}
}
public static class MyClass implements Serializable
{
int i = 555;
public static Object deserialize(byte[] serData)
throws IOException, ClassNotFoundException
{
ByteArrayInputStream bis = new ByteArrayInputStream(serData);
ObjectInputStream ois = new ObjectInputStream(bis);
Object obj = ois.readObject();
ois.close();
return obj;
}
}
/**
* Runs the test using the specified harness.
*
* @param harness the test harness (<code>null</code> not permitted).
*/
public void test(TestHarness harness)
{
MyClassLoader loader = new MyClassLoader();
ClassLoader sysLoader = getClass().getClassLoader();
Class cl;
harness.checkPoint("read the file");
try {
cl = loader.defineClass(getClass()
.getResourceAsStream("ClassLoaderTest$MyClass.class"),
"gnu.testlet.java.io.ObjectInputStream.ClassLoaderTest$MyClass");
harness.check(true);
} catch(Exception e) {
harness.debug(e);
harness.check(false);
return;
}
harness.check(cl.getClassLoader() == loader, "Class has correct classloader");
// Now the fun part. Pipe an instance of MyClass through an Object
// stream. Depending on which class-context we deserialize it in, the
// resulting instance should have a different ClassLoader (and class).
harness.checkPoint ("Deserialized objects have correct ClassLoader");
final byte[] serData;
final Object obj;
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(cl.newInstance());
oos.close();
serData = bos.toByteArray();
obj = MyClass.deserialize(serData);
harness.check(obj.getClass().getClassLoader() == sysLoader);
} catch(Exception e) {
harness.debug(e);
harness.check(false);
return;
}
//System.out.println (obj.getClass().getClassLoader() == loader);
harness.checkPoint("Class equality (==)");
try {
Method m = cl.getMethod("deserialize", new Class[] {byte[].class});
Object obj2 = m.invoke(null, new Object[] {serData});
harness.check(obj2.getClass().getClassLoader() == loader);
//System.out.println (obj2.getClass().getClassLoader() == loader);
harness.check (obj.getClass() != obj2.getClass());
} catch(Exception e) {
harness.debug(e);
harness.check(false);
}
}
}
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