private void writeState(XmlSerializer serializer, Node<?> node) throws IOException {
Entity parent = node.getParent();
if (parent != null) {
State s = parent.getChildState(node.getName());
int state = s.intValue();
if (state > 0) {
serializer.attribute(null, STATE_ATTRIBUTE, Integer.toString(state));
}
}
}
private Object extractNonEmptyChildren(String propertyName, Entity entity) {
List<Node<?>> list = new ArrayList<Node<?>>();
for (Node<?> childNode : entity.getAll(propertyName)) {
if (childNode instanceof Entity || (!childNode.isEmpty())) {
list.add(childNode);
}
}
if (list.isEmpty()) {
return null;
}
return Collections.unmodifiableList(list);
}
private Object evaluateExpression(Node<?> context, Node<?> thisNode, String expr)
throws InvalidExpressionException {
ExpressionFactory expressionFactory =
context.getRecord().getSurveyContext().getExpressionFactory();
DefaultValueExpression expression = expressionFactory.createDefaultValueExpression(expr);
Object object = expression.evaluate(context, thisNode);
return object;
}