When I try to overwrite the get function of a class, amazing thing
happens.
public class Counter extends ScriptableObject{
public Counter(){
System.out.println(this);
}
...........
private String id;
public void setId(String id){
this.id = id;
}
public void jsSet_id(String id){
this.id = id;
}
public String jsGet_id(){
return this.id;
}
public Object get(String name, Scriptable start){
System.out.println("Counter get "+name);
Object obj = super.get(name, start);
if(obj!=Scriptable.NOT_FOUND)
return super.get(name, start);
System.out.println("this "+this);
System.out.println("start "+start);
}
.............
}
The test code like this:
Object[] arg = { new Integer(7) };
Scriptable myCounter = cx.newObject(scope, "Counter",arg);
scope.put("c", scope, myCounter);
Counter counter = (Counter)myCounter;
counter.jsSet_id("id1");
The js code is very simple ,just like this:
c.id;
After running it, I get the following results:
" [EMAIL PROTECTED]
[EMAIL PROTECTED]
Counter get id
this [EMAIL PROTECTED]
start [EMAIL PROTECTED]
Counter get id "!
Now I want to know why the "
Counter get id " appears twice? I think It only appear once!
When I write the js code as this
c.id1
The result is like this
" [EMAIL PROTECTED]
[EMAIL PROTECTED]
Counter get id1
this [EMAIL PROTECTED]
start [EMAIL PROTECTED]
Counter get id1
this [EMAIL PROTECTED]
start [EMAIL PROTECTED]
"
Why there exist two objects, [EMAIL PROTECTED] object just keep
the class level attribute? Can you explain this simply for me?
Thank you!
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