Developing Data Services

How to Set Up the XML Parser

You have now created the networking and XML generation code for the application. The CrnpClient constructor calls a setupXmlProcessing method. This method creates a DocumentBuilderFactory object and sets various parsing properties on that object. The JAXP documentation describes this method in more detail. See https://docs.oracle.com/javase/9/.

• Create the Java code that implements the preceding logic.

  private void setupXmlProcessing() throws Exception
  {
  dbf = DocumentBuilderFactory.newInstance();
  
  // We don't need to bother validating
  dbf.setValidating(false);
  dbf.setExpandEntityReferences(false);
  
  // We want to ignore comments and whitespace
  dbf.setIgnoringComments(true);
  dbf.setIgnoringElementContentWhitespace(true);
  
  // Coalesce CDATA sections into TEXT nodes.
  dbf.setCoalescing(true);
  }