cannot import this code as UDF in mapping

[former_member440449]

Hi All,

I have this Java code working as expected in my eclipse and I need to import it into my PI mapping as UDF trying to avoid a Java Mapping.

The code is next one:

package XMLToFlat;

import java.io.BufferedReader;

import java.io.ByteArrayInputStream;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import java.io.ByteArrayOutputStream;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.Collection;

import java.util.Iterator;

import java.util.Map;

import com.sap.aii.mapping.api.AbstractTrace;

import com.sap.aii.mapping.api.AbstractTransformation;

import com.sap.aii.mapping.api.Attachment;

import com.sap.aii.mapping.api.DynamicConfiguration;

import com.sap.aii.mapping.api.DynamicConfigurationKey;

import com.sap.aii.mapping.api.InputAttachments;

import com.sap.aii.mapping.api.OutputAttachments;

import com.sap.aii.mapping.api.StreamTransformation;

import com.sap.aii.mapping.api.StreamTransformationConstants;

import com.sap.aii.mapping.api.StreamTransformationException;

import com.sap.aii.mapping.api.TransformationInput;

import com.sap.aii.mapping.api.TransformationOutput;

public class XMLToFlat extends AbstractTransformation {

    InputAttachments inputAttachments = null; 

    OutputAttachments outputAttachments = null; 

    DynamicConfiguration conf = null; 

    /**

     * @param args the command line arguments

     */

    public static void main(String[] args) throws FileNotFoundException, IOException {

        String xml = "PCFbQ0RBVEFbPD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz48Y2ZkaTpDb21w cm9iYW50ZSB4bWxuczpjZmRpPSJodHRwOi8vd3d3LnNhdC5nb2IubXgvY2ZkLzMiIHhtbG5zOnhz aT0iaHR0cDovL3d3dy53My5vcmcvMjAwMS9YTUxTY2hlbWEtaW5zdGFuY2UiIEx1Z2FyRXhwZWRp Y2lvbj0iWmFtb3JhIE1pY2hvYWPDg8KhbiIgTnVtQ3RhUGFnbz0iTm8gaWRlbnRpZmljYWRvIiBj ZXJ0aWZpY2Fkbz0iTUlJRWtEQ0NBM2lnQXdJQkFnSVVNREF3TURFd01EQXdNREF5TURJek5EazFN akF3RFFZSktvWklodmNOQVFFRkJRQXdnZ0dWTVRnd05nWURWUVFEREM5QkxrTXVJR1JsYkNCVFpY SjJhV05wYnlCa1pTQkJaRzFwYm1semRISmhZMm5EczI0Z1ZISnBZblYwWVhKcFlURXZNQzBHQTFV RUNnd21VMlZ5ZG1samFXOGdaR1VnUVdSdGFXNXBjM1J5WVdOcHc3TnVJRlJ5YVdKMWRHRnlhV0V4 T0RBMkJnTlZCQXNNTDBGa2JXbHVhWE4wY21GamFjT3piaUJrWlNCVFpXZDFjbWxrWVdRZ1pHVWdi R0VnU1c1bWIzSnRZV05wdzdOdU1TRXdId1lKS29aSWh2Y05BUWtCRmhKaGMybHpibVYwUUhOaGRD NW5iMkl1YlhneEpqQWtCZ05WQkFrTUhVRjJMaUJJYVdSaGJHZHZJRGMzTENCRGIyd3VJRWQxWlhK eVpYSnZNUTR3REFZRFZRUVJEQVV3TmpNd01ERUxNQWtHQTFVRUJoTUNUVmd4R1RBWEJnTlZCQWdN 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        try {

            xml = "";

            BufferedReader br = new BufferedReader(new FileReader(new File("C://XMLFileTest.txt")));

            String line = null;

            while ((line = br.readLine()) != null) {

                xml += line;

            }

            System.out.println(fromXML2TXT(xml, "|", "\n", "UTF-8"));

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    public void transform(TransformationInput tf_in, TransformationOutput tf_out) 

    throws StreamTransformationException { 

inputAttachments = tf_in.getInputAttachments(); 

outputAttachments = tf_out.getOutputAttachments(); 

conf = tf_in.getDynamicConfiguration(); 

this.execute(tf_in.getInputPayload().getInputStream(), tf_out 

        .getOutputPayload().getOutputStream()); 

} 

    /*

     * Method to recover the content from xml file and put it in a string

     */

    public void execute(InputStream in, OutputStream out) throws StreamTransformationException

    {

    }

    public static String fromXML2TXT(String xml, String fieldSeparator,

            String segmentSeparator, String encoding) {

        DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();

        StringBuilder sbText = new StringBuilder();

        StringBuilder sbSubline = new StringBuilder();

        try {

            DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();

            Document doc = docBuilder.parse(new ByteArrayInputStream(xml.getBytes(encoding)));

            Node rootNode = doc.getChildNodes().item(0);

            NodeList nlSegment = rootNode.getChildNodes();/*Also It includes new lines*/

            String line = "";

            String subline = "";

            //for segments

            for (int i = 0; i < nlSegment.getLength(); i++) {

                line = "";

                NodeList nlField = nlSegment.item(i).getChildNodes();

                if (nlSegment.item(i).getNodeType() == 1) /*only fields*/ {

                    for (int j = 0; j < nlField.getLength(); j++) {

                        if (nlField.item(j).getNodeType() == 1) /*only fields*/ {

                            if (nlField.item(j).getChildNodes().getLength() <= 1) {

                                line = line + nlField.item(j).getTextContent() + fieldSeparator;

                            } else {/*for nodes at thrird level*/

                                //new subsegment

                                subline = "";

                                sbSubline.append(segmentSeparator);

                                for (int k = 0; k < nlField.item(j).getChildNodes().getLength(); k++) {

                                    if (nlField.item(j).getChildNodes().item(k).getNodeType() == 1) {

                                        subline = subline + nlField.item(j).getChildNodes().item(k).getTextContent() + fieldSeparator;

                                    }

                                }

                                sbSubline.append(subline.substring(0, subline.length() - 1));

                            }

                        }

                    }

                    //Add line content removing last "fieldSeparator";

                    sbText.append(line.substring(0, line.length() - 1));

                    //add sublines

                    sbText.append(sbSubline);

                    sbSubline = new StringBuilder();

                    //Add segmentSeparator except for the last line

                    if (i < nlSegment.getLength() - 1) {

                        sbText.append(segmentSeparator);

                    }

                }

            }

        } catch (Exception e) {

            e.printStackTrace();

            throw new RuntimeException("Error during generating Flat format "

                    + e.getMessage());

        }

        return sbText.toString();

    }

}

I just want to receive as XML the whole mapping (var1 as string) and send it to a single field as FLAT.

How should I be doing this in the UDF? It is throwing me an exception but I don't get details on the same.

[smavachee · Accepted solution]

I guess this can be done using the standard graphical mapping if you are on SAP PI 7.1, isnt.! 

Jyothi has been demonstrated it with more better way here...also use of copyXML feature significantly reduce all coding efforts.

*. Sorry Cloudio, eventually its not a resolution afer all or what you are looking for but an alternative I have suggested.

Hope it helps.!

Regards,

Sunil

[former_member440449 · Accepted solution]

Sunil,

yes, it's not the solution that I am looking for but I appreciate your help anyway.

Per my poor Java abilities I am trying just to import that code as an UDF

hopefully someone else can help me on that.

[Former Member · Accepted solution]

Hi Claudio,

Not sure but you may import the class as jar file in imported archive and then add import statement for the class in UDF or function library.

Then call the method of class in UDF.

Please check this link:

http://scn.sap.com/thread/3289295

Regards,

Beena

[former_member440449 · Accepted solution]

Hi Beena,

Thanks for the response.

Actually doesn't seem to be a class issue.

I got this error while testing:

"Problem when Displaying Queue"

"Exception:[java.lang.RuntimeException: Error during generating Flat format ] in class com.sap.xi.tf._MessageMapping_ method XMLToString"

Any other suggestions? Has anyone tried to code it in a message mapping?

[nabendu_sen · Accepted solution]

Hi Claudio,

Can you check the below blog:

http://scn.sap.com/community/pi-and-soa-middleware/blog/2013/03/13/write-java-mapping-directly-in-es...

[former_member440449 · Accepted solution]

Thanks Nabendu, that's a good blog that I add to FF.

Finally I got solved the issue:

Issue is due to the code line

Document doc = docBuilder.parse(new ByteArrayInputStream(payloadXML.getBytes(encoding)));

Corrected code line is

Document  doc = docBuilder.parse(new InputSource(new StringReader(payloadXML)));

Its going to the exception block at his line only. Because you have used payloadXML.getBytes(encoding), actually here payloadXML is a string , not an XML.  So first we need to convert that string to an xml.

Thanks all for providing some help!