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h3. Introduction

package za.co.company.xi.storeconnectivity;

/**

  • This mapping program will convert GMTLog record types (XML) from the Extended Amount record types

  • to simple record types.

*

*/

import java.io.*;

import java.util.Map;

import org.xml.sax.*;

import org.xml.sax.helpers.DefaultHandler;

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

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.value.api.XIVMService;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.parsers.SAXParserFactory;

import javax.xml.parsers.SAXParser;

public class GMTLogExtendedFields2GMTLog extends DefaultHandler implements StreamTransformation {

      private Writer writer;

      private MappingTrace trace;  

      private boolean atTransactionType = false;

      public void setParameter(Map map) {

            trace = (MappingTrace) map.get(StreamTransformationConstants.MAPPING_TRACE);

      }

      public Writer getWriter() {

            return writer;

      }

      public void setWriter(Writer out) {

            this.writer = out;

      }

      public void startDocument() throws SAXException {

            emit(“<?xml version=’1.0′ encoding=’UTF-8′?>”);

      }

      public void endDocument() throws SAXException {

            try {

                  writer.flush();

            } catch (IOException e) {

                  throw new SAXException(“I/O error”, e);

            }

      }

      public void startElement(String namespaceURI,

                  String lName, // local name

                  String qName, // qualified name

                  Attributes attrs) throws SAXException {

            // Perform transaction type translation.

            if (lName.startsWith(“GMTLogTransaction”)) {

                  String[] typeSource = lName.split(“GMTLogTransaction”);

                  String typeTarget;

                  if (typeSource.length > 1) {

                        // Lookup record type conversion

                        typeTarget = XIVMService.executeMapping(“GMTLogExtendedField”, “GMTLogExtendedFieldSchema”, typeSource[1], “GMTLogExtendedFieldValue”, “GMTLogExtendedFieldValueSchema”);

                        if (typeTarget==null) {

                              logInfo(“No mapping configured for type: ” + typeSource[1]);

                              typeTarget = typeSource[1];

                        }

                        logInfo(“Using type: “+ typeTarget+ ” for record type: “+typeSource[1]);

                  } else {

                        typeTarget = “”;

                  }

                  // Construct new element name

                  String eName;

                  eName = “GMTLogTransaction” + typeTarget; // element name

                  emit(“<” + eName + “>”);

            // Catch TransactionType element

            } else if (lName.equals(“TransactionType”)) {

                  atTransactionType = true;

                  String eName = lName; // element name

                  emit(“<” + eName + “>”);

            } else {

                  String eName = lName; // element name

                  emit(“<” + eName + “>”);

            }

      }

      public void endElement(String namespaceURI,

                  String lName, // simple name

                  String qName // qualified name

      ) throws SAXException {

            if (lName.startsWith(“GMTLogTransaction”)) {

                  // Perform transaction type translation.

                  String[] typeSource = lName.split(“GMTLogTransaction”);

                  String typeTarget = new String();

                  if (typeSource.length > 1) {

                        // Lookup record type conversion

                        typeTarget = XIVMService.executeMapping(“GMTLogExtendedField”, “GMTLogExtendedFieldSchema”, typeSource[1], “GMTLogExtendedFieldValue”, “GMTLogExtendedFieldValueSchema”);

                        if (typeTarget==null) {

                              typeTarget = typeSource[1];

                        }

                  } else {

                        typeTarget = “”;

                  }

                  String eName;

                  eName = “GMTLogTransaction” + typeTarget; // element name

                  emit(“</” + eName + “>”);

            } else if (lName.equals(“TransactionType”)) {

                  // Release TransactionType tag

                  atTransactionType = false;

                  emit(“</” + lName + “>”);

            } else {

                  emit(“</” + lName + “>”);

            }

      }

      public void characters(char buf[], int offset, int len) throws SAXException {

            if (atTransactionType) {

                  String s = new String(buf, offset, len);

                  String t = s;

                  // Lookup record type conversion

                  t = XIVMService.executeMapping(“GMTLogExtendedField”, “GMTLogExtendedFieldSchema”, s, “GMTLogExtendedFieldValue”, “GMTLogExtendedFieldValueSchema”);

                  if (t==null) {

                        t = s;

                  }

                  // encode XML!

                  emit(encodeHTML(t));

            } else {

                  String s = new String(buf, offset, len);

                  // encode XML!

                  emit(encodeHTML(s));

            }

      }

      // Utility Methods …

      private String encodeHTML(String s) {

          StringBuffer out = new StringBuffer();

          for(int i=0; i<s.length(); i++) {

              char c = s.charAt(i);

              if(c > 127 || c==’&’ || c=='”‘ || c=='<‘ || c==’>’) {

                 out.append(“&#”(int)c“;”);

              } else {

                  out.append(c);

              }

          }

          return out.toString();

      }

      private void logInfo(String message) {

            if (trace != null)

                  trace.addInfo(message);

            else

                  System.out.println(message);

      }

      // Wrap I/O exceptions in SAX exceptions, to

      // suit handler signature requirements

      private void emit(String s) throws SAXException {

            try {

                  writer.write(s);

                  writer.flush();

            } catch (IOException e) {

                  throw new SAXException(“I/O error”, e);

            }

      }

      public void execute(InputStream in, OutputStream out)

                  throws StreamTransformationException {

            long start = System.currentTimeMillis();

            logInfo(“GMTLogExtendedFields2GMTLog mapping starting…”);

            OutputStreamWriter writer = new OutputStreamWriter(out);

            this.setWriter(writer);

            // Use the default (non-validating) parser

            SAXParserFactory factory = SAXParserFactory.newInstance();

            try {

                  // Parse the input

                  SAXParser saxParser = factory.newSAXParser();

                  saxParser.parse(in, this);

            } catch (SAXException se) {

                  throw new StreamTransformationException(se.getMessage());

            } catch (ParserConfigurationException pce) {

                  throw new StreamTransformationException(pce.getMessage());

            } catch (IOException ioe) {

                  throw new StreamTransformationException(ioe.getMessage());

            } finally {

                  long end = System.currentTimeMillis();

                  logInfo(“GMTLogExtendedFields2GMTLog mapping completed in ” + (end – start) + ” milliseconds.”);

            }

      }

}

All that is left to do in the Repository is to upload the new Java mapping as an Imported Archive and adding it to the Interface Mapping as the first step as shown in the picture below.

!https://weblogs.sdn.sap.com/weblogs/images/251795501/100305-MapExtFields-REP-IFD-modified.png|height=158|alt=Modified Interface Mapping in the Repository|width=696|src=https://weblogs.sdn.sap.com/weblogs/images/251795501/100305-MapExtFields-REP-IFD-modified.png|border=0!</body>

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