It’s a problem one year before… refer to: http://lyo.blogsome.com/2007/03/24/javautiltimer-diffs-in-j2me-j2se/
Today,I meet the problem again!After hours testing & coding, it was done!so exciting!^_^
Powerful ASM lib ( http://asm.objectweb.org/ )
==========
We need to replace 2 classes: java.util.Timer & java.util.TimerTask ( they must in the same package:( )
1. get both classes’ source codes from MIDP implement.
2. adapter user’s classes
// deal with the super class
public void visit(final int version, final int access, final String name,
final String signature, final String superName, final String[] interfaces)
{
if(superName.equals("java/util/TimerTask"))
{
super.visit(version, access, name, signature, "xxx/xxx/xxx/SubTimerTask", interfaces);
return;
}
else if(superName.equals("java/util/Timer"))
{
super.visit(version, access, name, signature, "xxx/xxx/xxx/Timer", interfaces);
return;
}
super.visit(version, access, name, signature, superName, interfaces);
}
// deal with class members
public FieldVisitor visitField(int access, String name,
String desc, String signature, Object value)
{
if(desc.equals("Ljava/util/Timer;"))
desc = "Lxxx/xxx/xxx/Timer;";
return cv.visitField(access, name, desc, signature, value);
}
3. adapter new Timer()
public void visitTypeInsn(final int opcode, final String desc)
{
……….
if(desc.equals("java/util/Timer"))
{
super.visitTypeInsn(opcode, "xxx/xxx/xxx/Timer");
return;
}
……….
}
4. adapter method calls
public void visitMethodInsn(int opcode, String owner, String name, String desc)
{
……….
if(owner.equals("java/util/Timer"))
{
if(desc.indexOf("java/util/TimerTask") != -1)
desc = desc.replaceAll("java/util/TimerTask", "xxx/xxx/xxx/SubTimerTask");
super.visitMethodInsn(opcode, "xxx/xxx/xxx/Timer", name, desc);
return;
}
else if(owner.equals("java/util/TimerTask"))
{
super.visitMethodInsn(opcode, "xxx/xxx/xxx/SubTimerTask", name, desc);
return;
}
……….
}
=========
This will be included in next version of KEmulator…