Question

I have returned the following String strFees720

which equals :

<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Fees720>
        <errorNode>
            <errorCode>0</errorCode>
            <errorMsg/>
            <errorSev/>
        </errorNode>
        <forwardScroll>       0093101200001117                0</forwardScroll>
        <backwardScroll>                                        </backwardScroll>
        <Field name="ACCID"><Value>93101200001034</Value></Field>
        <Field name="FPERIOD"><Value>2C</Value></Field>
        <Field name="STDATE"><Value>13 DEC 2012</Value></Field>
        <Field name="ENDATE"><Value>13 DEC 2012</Value></Field>
        <Field name="ADVDATE"><Value>19 DEC 2012</Value></Field>
        <Field name="DBDATE"><Value> F40LA1C   </Value></Field>
        <Field name="SNAME"><Value>N SINGLETON JG</Value></Field>
        <Field name="ACDESC"><Value>OVERDRAFT AAA</Value></Field>
        <Field name="TOTFEES"><Value>0</Value></Field>
        <Field name="DISCOUNT"><Value>0</Value></Field>
        <Field name="NETFEES"><Value>0</Value></Field>
        <Field name="CLRD_BAL"><Value>93101200001034</Value></Field>
        <Field name="ALLOW_RTE"><Value>0</Value></Field>
        <Field name="DISC_RTE"><Value>0</Value></Field>
        <Field name="ALLOW_TOT"><Value>0</Value></Field>
        <Field name="PCODE"><Value>0000000</Value></Field>
        <Field name="DRILLNSC"><Value>0</Value></Field>
        <Field name="DIALOG"><Value>9</Value></Field>
        <Field name="NUMLINES"><Value>1</Value></Field>
        <Field name="TOTLINES"><Value>0</Value></Field>
        <Field name="BPCUST"><Value>P</Value></Field>
        <Field name="NFEE_EXPDTE"><Value></Value></Field>
        <FEEDATA>
            <Field name="FCODE"><Value></Value></Field>
            <Field name="FEEDETS"><Value></Value></Field>
            <Field name="CHRG_TYPE"><Value></Value></Field>
            <Field name="DCODE"><Value></Value></Field>
            <Field name="VOLUME"><Value>0</Value></Field>
            <Field name="RATE"><Value>0</Value></Field>
            <Field name="TOTAL"><Value>0</Value></Field>
            <Field name="DRILL"><Value></Value></Field>
        </FEEDATA>
        <GROSSNETFEES>
            <Field name="FQUARTER"><Value>06 DEC 12    12 DEC 12</Value></Field>
            <Field name="GRSFEE"><Value>611960</Value></Field>
            <Field name="NFEE"><Value>611960</Value></Field>
            <Field name="FEEDISC"><Value>0</Value></Field>
        </GROSSNETFEES>
        <GROSSNETFEES>
            <Field name="FQUARTER"><Value>01 DEC 12    05 DEC 12</Value></Field>
            <Field name="GRSFEE"><Value>64850</Value></Field>
            <Field name="NFEE"><Value>64850</Value></Field>
            <Field name="FEEDISC"><Value>0</Value></Field>
        </GROSSNETFEES>
        <GROSSNETFEES>
            <Field name="FQUARTER"><Value>08 NOV 12    30 NOV 12</Value></Field>
            <Field name="GRSFEE"><Value>15866</Value></Field>
            <Field name="NFEE"><Value>15866</Value></Field>
            <Field name="FEEDISC"><Value>0</Value></Field>
        </GROSSNETFEES>
        <GROSSNETFEES>
            <Field name="FQUARTER"><Value>01 NOV 12    07 NOV 12</Value></Field>
            <Field name="GRSFEE"><Value>636</Value></Field>
            <Field name="NFEE"><Value>616</Value></Field>
            <Field name="FEEDISC"><Value>20</Value></Field>
        </GROSSNETFEES>
        <Field name="TOTGRSFEE"><Value>693312</Value></Field>
        <Field name="TOTNETFEE"><Value>693292</Value></Field>
    </Fees720>
</Response>

I would like to transform this xml string response into a new xml string

as follows:

    <?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Fees720>
        <errorNode>
            <errorCode>0</errorCode>
            <errorMsg/>
            <errorSev/>
        </errorNode>
        <forwardScroll>       0093101200001117                0</forwardScroll>
        <backwardScroll>                                        </backwardScroll>
        <accid>93101200001034</accid>
        <fperiod>2C</fperiod>
        <stdate>13 DEC 2012</stdate>
        <endate>13 DEC 2012</endate>
        <advdate>19 DEC 2012</advdate>
        <dbdate> F40LA1C   </dbdate>
        <sname>N SINGLETON JG</sname>
        <acdesc>OVERDRAFT AAA</acdesc>
        <totfees>0</totfees>
        <discount>0</discount>
        <netfees>0</netfees>
        <clrdbal>93101200001034</clrdbal>
        <allowrte>0</allowrte>
        <discrte>0</discrte>
        <allowtot>0</allowtot>
        <pcode>0000000</pcode>
        <drillnsc>0</drillnsc>
        <dialog>9</dialog>
        <numlines>1</numlines>
        <totlines>0</totlines>
        <bpcust>P</bpcust>
        <nfeeexpdte></nfeeexpdte>
        <feedata>
            <fcode></fcode>
            <feedets></feedets>
            <chrgtype></chrgtype>
            <dcode></dcode>
            <volume>0</volume>
            <rate>0</rate>
            <total>0</total>
            <drill></drill>
        </feedata>
        <grossnetfees>
            <fquarter>06 DEC 12    12 DEC 12</fquarter>
            <grsfee>611960</grsfee>
            <nfee>611960</nfee>
            <feedisc>0</feedisc>
        </grossnetfees>
        <grossnetfees>
            <fquarter>01 DEC 12    05 DEC 12</fquarter>
            <grsfee>64850</grsfee>
            <nfee>64850</nfee>
            <feedisc>0</feedisc>
        </grossnetfees>
        <grossnetfees>
            <fquarter>08 NOV 12    30 NOV 12</fquarter>
            <grsfee>15866</grsfee>
            <nfee>15866</nfee>
            <feedisc>0</feedisc>
        </grossnetfees>
        <grossnetfees>
            <fquarter>01 NOV 12    07 NOV 12</fquarter>
            <grsfee>636</grsfee>
            <nfee>616</nfee>
            <feedisc>20</feedisc>
        </grossnetfees>
        <totgrsfee>693312</totgrsfee>
        <totnetfee>693292</totnetfee>
    </Fees720>
</Response>

I’m thinking I need to do something along the lines of:

strFees720Transform = XSLTransformer.transform("mynewxsl.xsl", strFees720);

and transform the original xml into the new xml. Any advice on best way to do this please. Thanks

updated with method

    private String getServiceValue(String strXMLResponse, String strNode, String strService) throws ServletException{

    String strNodeValue = null;

    try{
        builder = new SAXBuilder(false);
        Document doc = builder.build(new InputSource(new StringReader(strXMLResponse)));

        Element root = doc.getRootElement();  
        Element rootchild = root.getChild(strService); 
        List rootchildren = rootchild.getChildren();

        for (int i=0;i <= rootchildren.size() -1;i++)  
        {  
            Element el = (Element) rootchildren.get(i);  

            if(el.getName().equalsIgnoreCase(strNode)){
                strNodeValue = el.getText();
            }
        }  

    } catch (Exception err) {
        logger.error(err.getMessage(), err);
        throw new ServletException(err.getMessage());
    }

    return strNodeValue;
}

Answer 1

The usual advice for “I want to make a few changes to my XML but keep most of it the same” questions is: start with an identity template (which copies the input to output verbatim), then add specific templates for the things you want to change. The identity template looks like

<xsl:template match="@*|node()">
  <xsl:copy>
    <xsl:apply-templates select="@*|node()" />
  </xsl:copy>
</xsl:template>

Now to handle the <Field> elements you want to create a new element whose name is derived from an attribute of the original Field

<xsl:template match="Field">
  <xsl:element name="{translate(@name, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_', 'abcdefghijklmnopqrstuvwxyz')}">
    <xsl:apply-templates select="Value/node()" />
  </xsl:element>
</xsl:template>

The translate function here will replace all upper-case letters with the equivalent lower-case, and also remove any underscores completely.

Finally for the FEEDATA and GROSSNETFEES you just need two simple templates

<xsl:template match="FEEDATA">
  <feedata>
    <xsl:apply-templates select="@*|node()"/>
  </feedata>
</xsl:template>
<!-- and likewise for GROSSNETFEES -->

You could combine these two templates into one using the same translate trick if you prefer.

As for the actual mechanics of doing the transformation, you need to look at the javax.xml.transform package. Seeing as you have code already to parse an XML string into a JDOM tree and extract the element of interest, I would do the XSL transformation in there. Create a single Templates instance at initialization time and store the reference somewhere

TransformerFactory tf = TransformerFactory.newInstance();
Source xslSource = new StreamSource(new File(....));
templates = tf.newTemplates(xslSource);

Now each time you need to do the transformation you can use this templates

try{
    builder = new SAXBuilder(false);
    Document doc = builder.build(new InputSource(new StringReader(strXMLResponse)));

    Element root = doc.getRootElement();  
    Element rootchild = root.getChild(strService); 
    List rootchildren = rootchild.getChildren();

    for (int i=0;i <= rootchildren.size() -1;i++)  
    {  
        Element el = (Element) rootchildren.get(i);  

        if(el.getName().equalsIgnoreCase(strNode)){
            // do the transformation
            Source s = new JDOMSource(el);
            StringWriter resultWriter = new StringWriter();
            Result r = new StreamResult(resultWriter);
            templates.newTransformer().transform(s, r);
            return resultWriter.toString();
        }