/**
* Create PVItem from XML document
*
* @param model Model to which this item will belong (but doesn't, yet)
* @param node XML node with item configuration
* @return PVItem
* @throws Exception on error
*/
public static PVItem fromDocument(final Model model, final Element node) throws Exception {
final String name = DOMHelper.getSubelementString(node, Model.TAG_NAME);
final double period = DOMHelper.getSubelementDouble(node, Model.TAG_SCAN_PERIOD, 0.0);
final PVItem item = new PVItem(name, period);
final int buffer_size =
DOMHelper.getSubelementInt(
node, Model.TAG_LIVE_SAMPLE_BUFFER_SIZE, Preferences.getLiveSampleBufferSize());
item.setLiveCapacity(buffer_size);
final String req_txt =
DOMHelper.getSubelementString(node, Model.TAG_REQUEST, RequestType.OPTIMIZED.name());
try {
final RequestType request = RequestType.valueOf(req_txt);
item.setRequestType(request);
} catch (Throwable ex) {
// Ignore
}
item.configureFromDocument(model, node);
// Load archives from saved configuration
boolean have_imported_data = false;
Element archive = DOMHelper.findFirstElementNode(node.getFirstChild(), Model.TAG_ARCHIVE);
while (archive != null) {
final String url = DOMHelper.getSubelementString(archive, Model.TAG_URL);
final int key = DOMHelper.getSubelementInt(archive, Model.TAG_KEY);
final String arch = DOMHelper.getSubelementString(archive, Model.TAG_NAME);
if (url.startsWith(ImportArchiveReaderFactory.PREFIX)) have_imported_data = true;
item.addArchiveDataSource(new ArchiveDataSource(url, key, arch));
archive = DOMHelper.findNextElementNode(archive, Model.TAG_ARCHIVE);
}
// When requested, use default archive sources for 'real' archives (RDB, ...)
// Do not clobber an imported archive data source, a specific file which was
// probably not meant to be replaced by a default.
if (Preferences.useDefaultArchives() && !have_imported_data)
item.useDefaultArchiveDataSources();
return item;
}
public RequestType getRequestType() {
return RequestType.valueOf(driver.getTitle());
}
public RequestType findValueByNumber(int number) {
return RequestType.valueOf(number);
}
