Step 5: Add a Script for XML Mapping

In the previous step, you added an XML map to your web service, but one part of the map was left unfinished. The <us_percentile> element, which gives the applicant's percentile ranking, currently displays a default value of 50% in all cases.

<applicant id="222222222">    
   <name_last>Smith</name_last>
   <name_first>John</name_first>
   <bankrupt>false</bankrupt>
   <balance_remaining>2000</balance_remaining>
   <risk_estimate>Applicant is a high risk.</risk_estimate>
   <score_info>
      <credit_score>560</credit_score>
      <us_percentile>50</us_percentile>
   </score_info>
   <message>Credit Report complete.</message>
</applicant>

In the following step you will finish the XML map by calculating a value for the <us_percentile> element. To do this, you will write a function in ECMAScript (also known as JavaScript), and then refer to the function from the XML map.

The tasks in this step are:

To Add a Script File for Use with Mapping

Right-click the investigateJWS folder and select New-->Other File Types.
The New File dialog opens.
Enter values as shown in the following illustration:
Click Create. This adds a JSX file called PercentileScript.jsx. WebLogic Workshop displays the new file in Source View.

Paste the following code into PercentileScript.jsx. Overwrite all of the code already in the file.

/* A function to calculate the applicant's credit score percentile. */
function calcPercentile (score) {
    var percentile = 0;
    var scoreLowEnd = 300;
    var number = 3162.5;
    percentile = Math.ceil((Math.pow(score, 2) - Math.pow(scoreLowEnd, 2))/(2 * number));
    return percentile;
}

Press Ctrl+S to save your work. Press Ctrl+F4 to close close PercentileScript.jsx.

To Edit the XQuery Map to Call Script

In this task you will edit the XQuery map to use PercentileScript.jsx to fill in the value of the <us_percentile> element.

public interface Callback extends com.bea.control.ServiceControl { /** * @common:message-buffer enable="true" * @jws:conversation phase="finish" * @jws:parameter-xml schema-element="ns0:applicant" xquery:: * declare namespace ns0 = "http://www.openuri.org/" * declare namespace ns1 = "http://openuri.org/bea/samples/workshop" * * <ns1:applicant id = "{ xs:int( data($input/ns0:applicant/ns0:taxID) ) }"> * <ns1:balance_remaining>{ xs:short( data($input/ns0:applicant/ns0:availableCCCredit) ) }</ns1:balance_remaining> * <ns1:bankrupt>{ data($input/ns0:applicant/ns0:currentlyBankrupt) }</ns1:bankrupt> * { * for $message in $input/ns0:applicant/ns0:message * return * <ns1:message>{ data($message) }</ns1:message> * } * { * for $firstName in $input/ns0:applicant/ns0:firstName * return * <ns1:name_first>{ data($firstName) }</ns1:name_first> * } * { * for $lastName in $input/ns0:applicant/ns0:lastName * return * <ns1:name_last>{ data($lastName) }</ns1:name_last> * } * { * for $approvalLevel in $input/ns0:applicant/ns0:approvalLevel * return * <ns1:risk_estimate>{ data($approvalLevel) }</ns1:risk_estimate> * } * <ns1:score_info> * <ns1:credit_score>{ xs:short( data($input/ns0:applicant/ns0:creditScore) ) }</ns1:credit_score> * <ns1:us_percentile> {investigateJWS.PercentileScript.calcPercentile(data($input/ns0:applicant/ns0:creditScore))} </ns1:us_percentile> * </ns1:score_info> * </ns1:applicant> * :: */ void onCreditReportDone(investigateJCS.Applicant applicant); }