private Properties getConnectionPropertiesFromDataNucleusConfiguration() {
final String persistenceXmlPath =
projectOperations
.getPathResolver()
.getFocusedIdentifier(Path.SRC_MAIN_RESOURCES, "META-INF/persistence.xml");
if (!fileManager.exists(persistenceXmlPath)) {
throw new IllegalStateException("Failed to find " + persistenceXmlPath);
}
final FileDetails fileDetails = fileManager.readFile(persistenceXmlPath);
Document document = null;
try {
final InputStream is = new BufferedInputStream(new FileInputStream(fileDetails.getFile()));
final DocumentBuilder builder = XmlUtils.getDocumentBuilder();
builder.setErrorHandler(null);
document = builder.parse(is);
} catch (final Exception e) {
throw new IllegalStateException(e);
}
final List<Element> propertyElements =
XmlUtils.findElements(
"/persistence/persistence-unit/properties/property", document.getDocumentElement());
Validate.notEmpty(
propertyElements, "Failed to find property elements in " + persistenceXmlPath);
final Properties properties = new Properties();
for (final Element propertyElement : propertyElements) {
final String key = propertyElement.getAttribute("name");
final String value = propertyElement.getAttribute("value");
if ("datanucleus.ConnectionDriverName".equals(key)) {
properties.put("database.driverClassName", value);
}
if ("datanucleus.ConnectionURL".equals(key)) {
properties.put("database.url", value);
}
if ("datanucleus.ConnectionUserName".equals(key)) {
properties.put("database.username", value);
}
if ("datanucleus.ConnectionPassword".equals(key)) {
properties.put("database.password", value);
}
if (properties.size() == 4) {
// All required properties have been found so ignore rest of
// elements
break;
}
}
return properties;
}
