Solved: PI 7.1 - Java Mapping Compilation Error

Former Member · ‎09-01-2012

Hi Experts,

Need your help in Java Mapping code compliation in PI 7.1.

Requirement is to PARSE input xml (attached file - input_file and desried as output xml - output_file.

We have written java code based on SAX Parser [Attached file - Java_code].

Intersting is :-

Now, when we are compling this java code in Eclipse , everything is working fine and it is giving proper output.

Coming to PI, when we are following the same code and steps as per PI . It is not parsing the file and creating only blank file.

What could be the problem ?

Please comment !

anupam_ghosh2 · ‎09-02-2012

Hi Anshul,

The code you have uploaded is not indented. I tried to go through each line of code but soon lost my patience to check the error. Indented code helps in better maintainance of the project. you can see more from this link http://en.wikipedia.org/wiki/Indent_style . Now what I can see is you are trying to code for PI 7.1 where you should be using

public class Demo extends  AbstractTransformation
{
   ----------
}

and not

public class Demo extends DefaultHandler implements StreamTransformation{
}

which is not supported by PI 7.1 .

In java you cannot inherit multiple classes. As you are alo trying to extend the class DefaultHandler this is not possible under the class Demo. Thus you should have Second class Which extends DefaultHandler within your code. When you import the code into PI server both the class files would get imported although from operation mapping you are going to call Demo.class.

The structure of the second class should be something like this

class Handling extends DefaultHandler
{

      public void startDocument() throws SAXException
      {
               --------
       }
      public void endDocument() throws SAXException
      {
            ----
      }

      public void startElement()     {
           ____________________ 
      }
            //other methods etc.

}

you can call methods of class Handling by instanciating an object of class Handling within execute method of class Demo. Moreover execute method cannot be called in PI 7.1 directly thus you need to add the method

public void transform(TransformationInput arg0, TransformationOutput arg1)
  throws StreamTransformationException {
  this.execute(arg0.getInputPayload().getInputStream(), arg1.getOutputPayload().getOutputStream());
}

inside the class Demo. Lot of changes are required in the code to make the code work in PI 7.1 .

As you have used @SuppressWarnings in your code compiler is not showing you any warnings .

When I tried to make it work for PI 7.1 it is producing blank XML file. I could have tried to re write the code but if a code is not well indented my thinking stops there. Please go thorugh each line of this link which clearly shows how to use SAX parser in Pi 7.1. Still if you have difficulty , you can come back to the forum. In eclipse the code works fine but once you try to deploy this in PI 7.1 it will produce blank XML. Finally one last point, the target XML you have uploaded does not have any namespace information or the target message root node information. Say for example I was expecting some output like this

<?xml version="1.0" encoding="UTF-8"?>
<ns0:MT_Customer xmlns:ns0="urn:newapi-javamapping">
-      <ORDER>
           <current_date>2012-08-29 15:50:23</current_date> 
           <action>issue</action> 
           <order_number>P0101158</order_number> 
           <order_type>PURCHASE</order_type> 
           <location_code>ADD/FAK/ET-ANL/DOCK</location_code> 
           <terms_conditions>A10</terms_conditions> 
-      <ITEMS>
           <line_number>1</line_number> 
           <line_description>Boeing 787</line_description> 
           <part_number>787</part_number> 
           <order_quantity>1 EA</order_quantity> 
           <unit_standard_price>10000</unit_standard_price> 
           <promised_by_dt>2012-09-18 15:50:21</promised_by_dt> 
           <type>FIXASSET</type> 
           <t_code>CMP1-1110003</t_code> 
    </ITEMS>
</ORDER>
</ns0:MT_Customer>

But your code is producing

<ORDER>  
           <current_date>2012-08-29 15:50:23</current_date> 
           <action>issue</action> 
           <order_number>P0101158</order_number> 
           <order_type>PURCHASE</order_type> 
           <location_code>ADD/FAK/ET-ANL/DOCK</location_code> 
           <terms_conditions>A10</terms_conditions> 
-      <ITEMS>
           <line_number>1</line_number> 
           <line_description>Boeing 787</line_description> 
           <part_number>787</part_number> 
           <order_quantity>1 EA</order_quantity> 
           <unit_standard_price>10000</unit_standard_price> 
           <promised_by_dt>2012-09-18 15:50:21</promised_by_dt> 
           <type>FIXASSET</type> 
           <t_code>CMP1-1110003</t_code> 
    </ITEMS>
</ORDER>

which is another reason where you can expect a blank XML in PI server.

Regards

Anupam

former_member181985 · ‎09-02-2012

Hi,

I checked your code and it works in PI as well without any modification.

Your thread subject line indicates compilation error, but I don't see any error description in your question. You only mentioned blank file which not an error.

former_member181985 · ‎09-01-2012

Hi,

You might need my blogs collectively for help:

http://scn.sap.com/community/pi-and-soa-middleware/blog/2012/08/05/coding-java-mapping-points-to-pon...

http://scn.sap.com/community/pi-and-soa-middleware/blog/2012/07/08/can-we-test-binary-files-in-inter...

- Praveen Gujjeti

PI 7.1 - Java Mapping Compilation Error

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