injecting params into xml #mad

XmlParseTest.java

@Test
public class XmlParseTest {

    public void testXmlEntity() throws Exception{
        
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = null;
        try {
          
          db = dbf.newDocumentBuilder();
        }
        catch (Exception se) {
          throw new Exception("XML Parser configuration error", se);
        }
        org.w3c.dom.Document doc = null;
        try {
            db.setEntityResolver(new EntityResolver() {
                
                @Override
                public InputSource resolveEntity(String publicId, String systemId)
                        throws SAXException, IOException {
                    return new InputSource(new StringReader("<!ENTITY foo \"bar\">"));
                }
            });
          doc = db.parse(new InputSource(new StringReader(
                  "<!DOCTYPE zz SYSTEM \"params-hook\">"+
                  "<rootElem>"+
                  "<tag>&foo;</tag>"+
                  "</rootElem>"
                  )));
          
          Assert.assertEquals("bar", doc.getElementsByTagName("tag").item(0).getTextContent());
        }
        catch (Exception se) {
          throw new Exception("Error parsing XML stream:" + se, se);
        }
    }
}