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How to simplify a groovy script that reads a WS because the result being sent back is simpler

Posted on 2016-11-10
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Last Modified: 2016-11-12
I want to take the output of a web service from webserviceX and assign it to a local variable in an application.

Currently this is done by using groovy script to read the output of the Weather Service WS.  The script is shown below:-

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;

// Clean response xml document
responseDocumentBody.normalizeDocument();
// Get result node
NodeList resultList = responseDocumentBody.getElementsByTagName("GetWeatherResult");
Element resultElement = (Element) resultList.item(0);
String weatherDataAsXML = resultElement.getTextContent();

// Check for empty result
if ("Data Not Found".equalsIgnoreCase(weatherDataAsXML))
    return null;

// Parse embedded XML of result
DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
InputSource inputSource = new InputSource();
inputSource.setCharacterStream(new StringReader(weatherDataAsXML));
Document weatherDataDocument = documentBuilder.parse(inputSource);
Node weatherNode = weatherDataDocument.getDocumentElement();

// Save weather data
Map<String,String> data = new HashMap<String,String>();
NodeList childNodes = weatherNode.getChildNodes();
for (int i=0; i<childNodes.getLength(); i++)
{
        Node node = childNodes.item(i);
        if (node.getNodeType() == Node.ELEMENT_NODE)
        {
                String key = node.getNodeName();
                String value = node.getTextContent();
                data.put(key, value);
        }
}
return data;

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The weather service ws returns a bunch of data in a string which is then parsed out into an array.

I would like to try this with a different web service from the WebserviceX site, specifically the Length/Distance Convertor WS (located here).

However, the script needs to change so that it isn't reading a big string which it then parses but just a double

HTTP/1.1 200 OK
Content-Type: application/soap+xml; charset=utf-8
Content-Length: length

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <ChangeLengthUnitResponse xmlns="http://www.webserviceX.NET/">
      <ChangeLengthUnitResult>[b]double[/b]</ChangeLengthUnitResult>
    </ChangeLengthUnitResponse>
  </soap12:Body>
</soap12:Envelope>

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so what changes need to be made to the script so that it just reads the double that is sent back from the web service and not a load of key pairs that are sent back from the get weather WS.

TIA
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Question by:Anthony Horner
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1 Comment
 
LVL 36

Accepted Solution

by:
mccarl earned 2000 total points
ID: 41883915
It should be as simple as this...

// Clean response xml document
responseDocumentBody.normalizeDocument();
// Get result node
NodeList resultList = responseDocumentBody.getElementsByTagName("ChangeLengthUnitResult");
Element resultElement = (Element) resultList.item(0);
Double value = Double.valueOf(resultElement.getTextContent());

return value;

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