The following example shows a sample Java callout class:

package qa.as11tests.javacallout;
 
import com.collaxa.cube.persistence.dto.XmlDocument;
 
import com.oracle.bpel.client.NormalizedMessage;
 
import java.util.logging.Logger;
import java.util.Map;
import java.util.Iterator;
 
import oracle.tip.mediator.common.api.CalloutMediatorMessage;
import oracle.tip.mediator.common.api.ExternalMediatorMessage;
import oracle.tip.mediator.common.api.IJavaCallout;
import oracle.tip.mediator.common.api.MediatorCalloutException;
import oracle.tip.mediator.metadata.CaseType;
import oracle.tip.mediator.utils.XmlUtils;
 
import oracle.tip.pc.services.functions.ExtFunc;
 
import oracle.xml.parser.v2.XMLDocument;
 
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
 
public class JavaCalloutSanity implements IJavaCallout {
    Logger logger = Logger.getLogger("Callout");
    public JavaCalloutSanity() {    }    
    
    public void initialize(Logger logger) throws MediatorCalloutException {
        this.logger = logger;
        this.logger.info("Initializing...");
    }
    public boolean preRouting(CalloutMediatorMessage calloutMediatorMessage) {
        System.out.println("Pre routing...");
        String sPayload = "null";
        String sPayload_org = "null";        
        for (Iterator msgIt = calloutMediatorMessage.getPayload().entrySet().iterator();
             msgIt.hasNext(); ) {
            Map.Entry msgEntry = (Map.Entry)msgIt.next();
            Object msgKey = msgEntry.getKey();
            Object msgValue = msgEntry.getValue();
            if (msgKey.equals("request"))
                sPayload = XmlUtils.convertDomNodeToString((Node)msgValue);           
       }
        sPayload_org = sPayload;
        String tobeReplaced = "CHANGE_THIS";
        String replaceWith = "JAVA_CALLOUT_||_PRE_ROUTING";
        int start = sPayload.indexOf(tobeReplaced);
        StringBuffer sb = new StringBuffer();
        sb.append(sPayload.substring(0, start));
        sb.append(replaceWith);
        sb.append(sPayload.substring(start + tobeReplaced.length()));
        String changedPayload = sb.toString();        
        String uid;
        try {
            uid = ExtFunc.generateGuid();            
        } catch (Exception e) {
        }
              XMLDocument changedoc;        
        try {
            changedoc = XmlUtils.getXmlDocument(changedPayload);
            String mykey = "request";
            calloutMediatorMessage.addPayload(mykey,
                                              changedoc.getDocumentElement());
            //calloutMediatorMessage.getPayload().put(mykey, changedoc);
        } catch (Exception e) {
        }
        System.out.println("Changed from : \n"+sPayload_org+"\nTo\n"+changedPayload);
        System.out.println("End Pre routing...\n\n");
        return false;
    }
    public boolean postRouting(CalloutMediatorMessage calloutMediatorMessage,
                               CalloutMediatorMessage calloutMediatorMessage1,
                               Throwable throwable) throws MediatorCalloutException {
        System.out.println("Start Post routing...");
        String sPayload = "null";
        String sPayload_org = "null";        
        for (Iterator msgIt = calloutMediatorMessage1.getPayload().entrySet().iterator();
             msgIt.hasNext(); ) {
            Map.Entry msgEntry = (Map.Entry)msgIt.next();
            Object msgKey = msgEntry.getKey();
            Object msgValue = msgEntry.getValue();
            if(msgKey.equals("reply"))
                sPayload = XmlUtils.convertDomNodeToString((Node)msgValue);          
        }
        
        sPayload_org = sPayload;        
        String tobeReplaced = "POST_ROUTING_RULE_REQUEST_REPLY";
        String replaceWith = "POST_ROUTING_RULE_REQUEST_REPLY_||_POSTROUTING_||_JAVA_CALLOUT_WORKING";
        int start = sPayload.indexOf(tobeReplaced);
        StringBuffer sb = new StringBuffer();
        sb.append(sPayload.substring(0, start));
        sb.append(replaceWith);
        sb.append(sPayload.substring(start + tobeReplaced.length()));
        String changedPayload = sb.toString();
        XMLDocument changedoc;
        try {
            changedoc = XmlUtils.getXmlDocument(changedPayload);
            String mykey = "reply";
            calloutMediatorMessage1.addPayload(mykey,changedoc.getDocumentElement());
            // calloutMediatorMessage1.getPayload().put(mykey, changedoc.getDocumentElement());
        } catch (Exception f) {
        }
        System.out.println("Changed from : \n"+sPayload_org+"\nTo\n"+
                changedPayload);
        System.out.println("End Post routing...\n\n");
        return false;
    }
    public boolean preRoutingRule(CaseType caseType,
                                  CalloutMediatorMessage calloutMediatorMessage) {
        System.out.println("\nStart PreRoutingRule.\n");
        String sPayload = "null";
        String sPayload_org = "null";
        for (Iterator msgIt =
             calloutMediatorMessage.getPayload().entrySet().iterator();
             msgIt.hasNext(); ) {
 
            Map.Entry msgEntry = (Map.Entry)msgIt.next();
            Object msgKey = msgEntry.getKey();
            Object msgValue = msgEntry.getValue();
            if(msgKey.equals("request"))
                sPayload = XmlUtils.convertDomNodeToString((Node)msgValue);            
        }        
        sPayload_org = sPayload;
        String tobeReplaced = "PRE_ROUTING";
        String replaceWith = "PRE_ROUTING_||_PRE_ROUTING_RULE";
        int start = sPayload.indexOf(tobeReplaced);
        StringBuffer sb = new StringBuffer();
        sb.append(sPayload.substring(0, start));
        sb.append(replaceWith);
        sb.append(sPayload.substring(start + tobeReplaced.length()));
        String changedPayload = sb.toString();
        XMLDocument changedoc;
        try {
            changedoc = XmlUtils.getXmlDocument(changedPayload);
            String mykey = "request";
            calloutMediatorMessage.addPayload(mykey,
                                              changedoc.getDocumentElement());
            // calloutMediatorMessage.getPayload().put(mykey, changedoc);
        } catch (Exception e) {
        }
        System.out.println("Changed from : \n"+sPayload_org+"\nTo\n"+changedPayload);
        System.out.println("End PreRoutingRule.\n\n");
        return true;
    }
    public boolean postRoutingRule(CaseType caseType,
                                   CalloutMediatorMessage calloutMediatorMessage,
                                   CalloutMediatorMessage calloutMediatorMessage1,
                                   Throwable throwable) {
        System.out.println("Start PostRoutingRule.");
        String req_sPayload = "null";
        String req_sPayload_org = "null";
        String rep_sPayload = "null";
        String rep_sPayload_org = "null";
        for (Iterator msgIt =
             calloutMediatorMessage.getPayload().entrySet().iterator();
             msgIt.hasNext(); ) {
            Map.Entry msgEntry = (Map.Entry)msgIt.next();
            Object msgKey = msgEntry.getKey();
            Object msgValue = msgEntry.getValue();
            if(msgKey.equals("request"))
                req_sPayload = XmlUtils.convertDomNodeToString((Node)msgValue);            
        }
        req_sPayload_org = req_sPayload;
        String tobeReplaced = "PRE_ROUTING_RULE";
        String replaceWith = "PRE_ROUTING_RULE_||_POST_ROUTING_RULE_REQUEST";
        int start = req_sPayload.indexOf(tobeReplaced);
        StringBuffer sb = new StringBuffer();
        sb.append(req_sPayload.substring(0, start));
        sb.append(replaceWith);
        sb.append(req_sPayload.substring(start + tobeReplaced.length()));
        String changedPayload = sb.toString();
        XMLDocument changedoc;
        try {
            changedoc = XmlUtils.getXmlDocument(changedPayload);
            String mykey = "request";
            calloutMediatorMessage.addPayload(mykey,
                                              changedoc.getDocumentElement());
            // calloutMediatorMessage.getPayload().put(mykey, changedoc);
        } catch (Exception e) {
        }
        for (Iterator msgIt =
             calloutMediatorMessage1.getPayload().entrySet().iterator();
             msgIt.hasNext(); ) {
            Map.Entry msgEntry = (Map.Entry)msgIt.next();
            Object msgKey = msgEntry.getKey();
            Object msgValue = msgEntry.getValue();
            if(msgKey.equals("reply"))
                rep_sPayload = XmlUtils.convertDomNodeToString((Node)msgValue);            
        }
        rep_sPayload_org = rep_sPayload;        
        tobeReplaced = "PRE_ROUTING_RULE";
        replaceWith = "PRE_ROUTING_RULE_||_POST_ROUTING_RULE_REQUEST_REPLY";
        start = rep_sPayload.indexOf(tobeReplaced);
        sb = new StringBuffer();
        sb.append(rep_sPayload.substring(0, start));
        sb.append(replaceWith);
        sb.append(rep_sPayload.substring(start + tobeReplaced.length()));
        changedPayload = sb.toString();
        try {
            changedoc = XmlUtils.getXmlDocument(changedPayload);
            String mykey = "reply";
            calloutMediatorMessage1.addPayload(mykey,changedoc.getDocumentElement());
            // calloutMediatorMessage1.getPayload().put(mykey, changedoc.getDocumentElement());
        } catch (Exception e) {
        }
        System.out.println("Changed from : \n"+req_sPayload_org+"\nTo\n"+changedPayload);
        System.out.println("End postRoutingRule\n\n");
        return true;
    }
}