Hi,
I'm trying to build up a class to read NikePlus xml and store it.
I get this error if i try to run it "XMLElement is Undefined "; I guess it is connected with PApplet location but i don't know what to use instead of "this" and why.
Can you explain me what to do to make it working?
Thanks.

Code:

/*=====================================
 *Nike Plus Importer v.0.1
 *===================================*/
 

class NikePlusImporter{
  
  /*====================================
   *XML storing variables
   *==================================*/
  XMLElement NikePlus; //entire XML
  XMLElement [ ] RunList; //run List array
  String url = "nikeplus.nike.com/nikeplus/v1/services/widget/get_public_run_list.jsp?userID=";
  
  
  /*======================================
   *Constructor
   *load XML;
   *string RunnerID,
   ======================================*/
  NikePlusImporter(String Id){
    String UrlNike =(url + Id);

    NikePlus = new XMLElement(this, UrlNike);
    RunList = NikePlus.getChildren("runList/run");
    int numRun = RunList.length;
    println(numRun);
  }

}
 

I had problems with some xml loading in Processing because of the usual xml header (and I can't remember if it was this error, maybe).

Removing the first 3 characters of the xml file made it running, but I don't know how to make it at runtime instead of editing the xml file... ?
A fix for the library might be nice too.

("<?xml version="1.0" encoding="utf-8"?>" -> see the 3 first characters "" ).

that was so obvious .. tja.

"this" in your case referrs to an instance of "NikePlusImporter" (from where you call it) but XMLElement needs a "PApplet" (your sketch). There are several way to fix it: you can put a global function to pass back the PApplet, like:

PApplet getParent ()
{
    return this;
}

then you can do:

NikePlus = new XMLElement( getParent(), UrlNike);

... another way to do it is to pass your sketch into the constructor of the NikePlusImporter class.

F

no error means that's solved. are you sure that the xml is available to be read? i'd try to println the contents first .. and add "http://" to the url.

here's "this" in the processing ref:
http://processing.org/reference/this.html

F

ah, i see. that was my fault .. getParent was a bad choice for the function name and caused a stack overflow. here's the working code:

Code:

String RunnerId = "751872695";    //ID of Nike+ Runner
NikePlusImporter nike;

void setup(){
 size(200,200); 
 //noLoop();   
  
  nike = new NikePlusImporter(RunnerId);
}

void draw()   {
  
  
  
}

PApplet getPapplet ()
{
    return this;
}



class NikePlusImporter{
  
  /*====================================
   *XML storing variables
   *==================================*/
  XMLElement NikePlus; //entire XML
  XMLElement [ ] RunList; //run List array
  String url = "http://nikeplus.nike.com/nikeplus/v1/services/widget/get_public_run_list.jsp?userID=";
  
  
  /*======================================
   *Constructor
   *load XML;
   *string RunnerID,
   ======================================*/
  NikePlusImporter(String Id){
    String UrlNike =(url + Id);

    NikePlus = new XMLElement(getPapplet(), UrlNike);
    RunList = NikePlus.getChildren("runList/run");
    int numRun = RunList.length;
    println(numRun);
  }

} 

F

WeberFederico wrote on Apr 11^th, 2009, 4:53pm:

I think you cannot: you give "this" to XMLElement class to let it access to PApplet fields and methods.
If you put your class in an independent file (.java), you have to pass the PApplet instance to your class, usually in the constructor, or by using a setter.
Something like:

NikePlusImporter npi = new NikePlusImporter(this, id);

on the sketch's side, and:

NikePlusImporter(PApplet pa, String Id){
   String UrlNike =(url + Id);
   NikePlus = new XMLElement(pa, UrlNike);
   // You can put 'pa' in a field of NikePlusImporter if you need it later

in your class.