@Override
protected final void startElement(Attributes attrs) {
children = declareChildren();
if (children != null) {
for (ElementHandler child : children.values()) {
child.setParent(this);
}
}
startSelf(attrs);
}
@SuppressWarnings({"rawtypes", "unchecked"})
public ParserContext(ConfigurationBuilder builder) {
List<ElementHandler> loadedHandlers =
Iterators.asList(ServiceLoader.load(ElementHandler.class));
for (ElementHandler handler : loadedHandlers) {
NamespaceElementHandler annotation =
Annotations.getAnnotation(handler.getClass(), NamespaceElementHandler.class);
if (annotation != null) {
handlers.put(new HandlerId(annotation.namespace(), annotation.elementName()), handler);
}
}
this.builder = builder;
}
@SuppressWarnings("unchecked")
public <T> T processElement(Element element) throws ConfigurationException {
String namespace = $(element).namespaceURI();
String tagName = $(element).tag();
ElementHandler<?> handler = handlers.get(new HandlerId(namespace, tagName));
if (handler != null) {
Object o = handler.processElement(this, element);
return (T) o;
}
throw new ConfigurationException(
"No Handler registered for element named ["
+ tagName
+ "] in namespace: ["
+ namespace
+ "]");
}
/**
* Parses attributes of the element. The following attributes are supported:
*
* <dl>
* <dt>idref
* <dd>the identifier to refer to the variable
* <dt>id
* <dd>the identifier of the variable that is intended to store the result
* </dl>
*
* @param name the attribute name
* @param value the attribute value
*/
@Override
public void addAttribute(String name, String value) {
if (name.equals("idref")) { // NON-NLS: the attribute name
this.value = ValueObjectImpl.create(getVariable(value));
} else {
super.addAttribute(name, value);
}
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes)
throws SAXException {
String elem = localName;
if (elem.isEmpty()) {
elem = qName;
}
elemStack.addFirst(elem);
ElementHandler contextHandler = handlerStack.getFirst();
ElementHandler elemHandler = contextHandler.getHandler(elem);
if (elemHandler == null) {
throw new IllegalStateException(
String.format(
"Context handler %s have not returned handler for elem %s",
contextHandler, elemStack));
}
handlerStack.addFirst(elemHandler);
elemHandler.startElement(attributes);
}
public static int handleElements(NodeList nodeList, ElementHandler handler) throws Exception {
int count = 0;
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
if (node instanceof Element) {
Element element = (Element) node;
handler.handleElement(element);
++count;
}
}
return count;
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
String elem = localName;
if (elem.isEmpty()) {
elem = qName;
}
// check doc structure sanity
if (!elemStack.getFirst().equals(elem)) {
throw new IllegalStateException(
String.format("Elem ending expected: %s, but was: %s", elemStack.getFirst(), elem));
}
ElementHandler elemHandler = handlerStack.removeFirst();
if (sb != null) {
String txt = sb.toString();
// !
txt.trim();
elemHandler.characters(txt);
sb = null;
}
elemHandler.endElement();
elemStack.removeFirst();
}
