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.