/**
* Returns a new {@code XMLConfig} with no entries.
*
* @return a new {@code XMLConfig} with no entries
*/
static XMLConfig empty() {
XMLConfig rv = naked();
Document xmlDoc;
try {
xmlDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
} catch (ParserConfigurationException ex) {
throw new ConfigException(ex);
}
Element rootElement = xmlDoc.createElement(ROOT_PREFIX);
Element numberElements = xmlDoc.createElement(Repository.NUMBER.getName());
rootElement.appendChild(numberElements);
Element stringElements = xmlDoc.createElement(Repository.STRING.getName());
rootElement.appendChild(stringElements);
Element booleanElements = xmlDoc.createElement(Repository.BOOLEAN.getName());
rootElement.appendChild(booleanElements);
xmlDoc.appendChild(rootElement);
xmlDoc.setXmlStandalone(true);
rv.stringElements = stringElements;
rv.numberElements = numberElements;
rv.booleanElements = booleanElements;
rv.xmlDoc = xmlDoc;
return rv;
}
/**
* Sets up the document for use.
*
* @param rv the {@code XMLConfig} to set up
* @param xmlDoc
* @return
*/
static XMLConfig readAndSetupEntriesImpl(final XMLConfig rv, final Document xmlDoc) {
try {
xmlDoc.setXmlStandalone(true);
rv.xmlDoc = xmlDoc;
Element root = xmlDoc.getDocumentElement();
if (root == null) {
throw new ConfigException("missing root element");
}
NodeList nodeList;
Element repoElement;
Node repoNode;
NodeList elementNodes;
int len;
for (Repository repository : Repository.values()) {
nodeList = root.getElementsByTagName(repository.getName());
len = nodeList.getLength();
if (len == 0) {
throw Configs.newMissingRepoException(repository);
} else if (len > 1) {
throw Configs.newDuplicateRepoException(repository);
}
repoNode = nodeList.item(0);
if (!(repoNode instanceof Element)) {
throw newInvalidNodeClassException(Element.class);
}
repoElement = (Element) repoNode;
switch (repository) {
case NUMBER:
rv.numberElements = repoElement;
break;
case BOOLEAN:
rv.booleanElements = repoElement;
break;
case STRING:
rv.stringElements = repoElement;
break;
}
elementNodes = repoElement.getElementsByTagName(ENTRY_FLAG);
len = elementNodes.getLength();
for (int j = 0; j < len; ++j) {
Node n = elementNodes.item(j);
if (n instanceof Element) {
Element e = (Element) n;
Attr nameAttr = e.getAttributeNode(KEY_FLAG);
if (nameAttr == null) {
throw newMalformedKeyAttrException(repository);
}
String key = nameAttr.getValue();
Attr valueAttr = e.getAttributeNode(VALUE_FLAG);
if (valueAttr == null) {
throw newMalformedValueAttrException(key, repository);
}
String value = valueAttr.getValue();
// Number uses a different format
if (repository == Repository.NUMBER) {
Attr typeAttr = e.getAttributeNode(TYPE_FLAG);
if (typeAttr == null) {
throw newMalformedValueAttrException(key, repository);
}
rv.flushedNumberElements.put(
key,
Configs.parseNumberFromType(
value, Configs.numberTypeValueOf(typeAttr.getValue())));
continue;
}
if (repository == Repository.BOOLEAN) {
rv.flushedBooleanElements.put(key, Configs.parseBoolean(value));
} else {
rv.flushedStringElements.put(key, value);
}
}
}
}
} catch (Configs.BooleanParsingException ex) {
throw new ConfigException(ex);
} catch (NumberFormatException ex) {
throw new ConfigException(ex);
} catch (DOMException ex) {
throw new ConfigException(ex);
}
return rv;
}