/** Receive notification of the start of an element. */
@Override
public void startElement(String uri, String l, String q, Attributes a) {
/*
* 1. Load a class that matches the element name.
* 2. If no class found, assume the element maps to a String.
* 3. Otherwise, construct a new object of the class with element attributes.
*/
_logger.fine(
S.fine(_logger)
? "Consider element " + l + "\n uri " + uri + "\n q " + q
: null);
ElementInfo info = new ElementInfo();
// Record java packages defined on this element as xmlns
for (int i = 0; i < a.getLength(); ++i) {
_logger.fine(
S.fine(_logger)
? " attr "
+ a.getQName(i)
+ "="
+ a.getValue(i)
+ "\n "
+ a.getQName(i)
+ ":"
+ a.getURI(i)
: null);
if (a.getQName(i).startsWith("xmlns:") && a.getValue(i).startsWith("java://")) {
info.pkgs.put(a.getQName(i).substring(6), a.getValue(i).substring(7));
}
}
// Resolve the package name of this element, which could be empty (default package)
int colon = q.indexOf(':');
if (colon > 0) {
String xmlns = q.substring(0, colon);
// is it defined right here?
info.jpkg = info.pkgs.get(xmlns);
// find a matching namespace from ancesters
if (info.jpkg == null && !_stack.isEmpty()) {
for (int i = _stack.size() - 1; i >= 0; --i) {
info.jpkg = _stack.get(i).pkgs.get(xmlns);
if (info.jpkg != null) {
break;
}
}
}
} else if (isPrimitiveType(q)) {
info.jpkg = "java.lang";
} else if (!_stack.isEmpty()) {
info.jpkg = _stack.get(_stack.size() - 1).jpkg;
} else {
info.jpkg = _jpkg;
}
_logger.fine("to create element with package = " + info.jpkg);
try {
info.name =
(info.jpkg != null) ? info.jpkg + '.' + Strings.toCamelCase(l) : Strings.toCamelCase(l);
try {
if (info.name.endsWith("...")) {
// Array construction
info.type = Class.forName(info.name.substring(0, info.name.length() - 3));
info.data = new ArrayList<Object>();
} else {
// Non-array construction
int size = a.getLength();
TypedValueGroup arguments = new TypedValueGroup();
for (int i = 0; i < size; ++i) {
if (!a.getQName(i).startsWith("xmlns:") && !a.getQName(i).equals("xmlns")) {
arguments.add(guessUntypedValue(a.getQName(i), a.getValue(i)));
}
}
arguments.complete();
_logger.fine(S.fine(_logger) ? "arguments=" + arguments : null);
if (arguments.size() > 0) {
if (arguments.size() == 1 && "java.lang".equals(info.jpkg)) {
info.inst.put(
"@as",
Strings.toCamelCase(
arguments.get(0).name, '-', false)); // respect original spelling
info.data = arguments.get(0).get(0).data;
info.type = arguments.get(0).get(0).type;
} else {
Exception last = null;
Object[] args = new Object[arguments.size()];
while (arguments.load(args, 0)) {
try {
_logger.fine(
S.fine(_logger)
? "to create " + info.name + " with args: " + args.length + args(args)
: null);
info.data = _factory.create(info.name, args);
info.type = info.data.getClass();
break;
} catch (InvocationTargetException x) {
throw x;
} catch (Exception x) {
last = x;
_logger.fine(
"failure in creating " + info.name + ": probing for other constructors");
}
}
if (info.data == null) {
throw last;
}
}
} else {
_logger.fine("Create " + info.name + " with the default constructor");
info.data = _factory.create(info.name);
info.type = info.data.getClass();
}
}
} catch (ClassNotFoundException x) {
// no class by the element name is found, assumed String
if (!_lenient) {
throw new BeanAssemblyException("No class associated with element " + q);
} else {
_logger.log(Level.WARNING, "can't find class " + info.name, x);
}
}
_stack.add(info);
// _logger.fine(">>ElementInfo: " + info.type.getName() + " in " + info);
// all other exceptions indicate mismatches between the beans and the XML schema
} catch (Exception x) {
if (!_lenient) {
throw new BeanAssemblyException("Failed to assemble bean from element " + q, x);
} else {
_logger.log(Level.SEVERE, "can't create object for this element", x);
}
}
}