Code for the blog - XML XSD Validation - An Alternative for SAP PI

// Java Mapping Code


package test.jaxbpimapping;import generated.Book;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import javax.xml.bind.JAXBContext;

import javax.xml.bind.JAXBException;

import javax.xml.bind.Unmarshaller;

import javax.xml.validation.Schema;

import javax.xml.validation.SchemaFactory;

import org.xml.sax.SAXException;

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

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

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

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

public class XSDValidationUsingJAXB extends AbstractTransformation {

private Boolean success = true;

public void transform(TransformationInput arg0, TransformationOutput arg1)

throws StreamTransformationException {

getTrace().addInfo("JAVA Mapping XSDValidationUsingJAXB is Initiated");

JAXBContext jaxbContext = null;

Unmarshaller unMarshaller = null;

Schema schema = null;

String outputPayload = null;

InputStream in = arg0.getInputPayload().getInputStream();

try {

jaxbContext = JAXBContext.newInstance(Book.class);

unMarshaller = jaxbContext.createUnmarshaller();

SchemaFactory schemaFactory = SchemaFactory

.newInstance("http://www.w3.org/2001/XMLSchema");

schema = schemaFactory.newSchema(new File(

"/MyFolder/BookXSDXNode.xsd")); //This can be any folder on the PI file server which <SID>adm has access to

unMarshaller.setSchema(schema);

Book b = (Book) unMarshaller.unmarshal(in);

int i = b.getDetails().size();

getTrace().addInfo("Number of occurrence of Details node is :" + i);

try {

outputPayload = "<?xml version=\"1.0\"?><validation><Status>success</Status><Description></Description></validation>";

arg1.getOutputPayload().getOutputStream().write(

outputPayload.getBytes("UTF-8"));

} catch (IOException e) {

getTrace().addWarning("IOException: " + e.toString());

}

} catch (JAXBException e) {

success = false;

getTrace().addInfo("Success (JAXBException) " + success.toString());

getTrace().addWarning("JAXBException: " + e.toString());

try {

outputPayload = "<?xml version=\"1.0\"?><validation><Status>failed</Status><Description>"

+ e.toString() + "</Description></validation>";

arg1.getOutputPayload().getOutputStream().write(

outputPayload.getBytes("UTF-8"));

} catch (IOException IOe) {

getTrace().addWarning("IOException: " + IOe.toString());

}

} catch (SAXException e) {

success = false;

getTrace().addInfo("Success (SAXException) " + success.toString());

getTrace().addWarning("SAXException: " + e.toString());

try {

outputPayload = "<?xml version=\"1.0\"?><validation><Status>failed</Status><Description>"

+ e.toString() + "</Description></validation>";

arg1.getOutputPayload().getOutputStream().write(

outputPayload.getBytes("UTF-8"));

} catch (IOException IOe) {

getTrace().addWarning("IOException: " + IOe.toString());

}

}

}

<?xml version="1.0" encoding="UTF-8" ?>

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="AdditionalInfo">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="journalTitle" />
        <xs:element ref="publisher" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:element name="author">
    <xs:complexType mixed="true" />
  </xs:element>

  <xs:element name="Book">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="Details" maxOccurs="unbounded" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:element name="Details">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="title" />
        <xs:element ref="author" />
        <xs:element ref="edition" />
        <xs:element ref="AdditionalInfo" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:element name="edition" type="xs:integer">
    
  </xs:element>

  <xs:element name="journalTitle">
    <xs:complexType mixed="true" />
  </xs:element>

  <xs:element name="publisher">
    <xs:complexType mixed="true" />
  </xs:element>

  <xs:element name="title">
    <xs:complexType mixed="true" />
  </xs:element>

</xs:schema>