private IndexingFilter[] indexingFilters;
public IndexingFilters(Configuration conf) {
/* Get indexingfilter.order property */
String order = conf.get(INDEXINGFILTER_ORDER);
ObjectCache objectCache = ObjectCache.get(conf);
this.indexingFilters = (IndexingFilter[]) objectCache
.getObject(IndexingFilter.class.getName());
if (this.indexingFilters == null) {
/*
* If ordered filters are required, prepare array of filters based on
* property
*/
String[] orderedFilters = null;
if (order != null && !order.trim().equals("")) {
orderedFilters = order.split("\\s+");
}
try {
ExtensionPoint point = PluginRepository.get(conf).getExtensionPoint(
IndexingFilter.X_POINT_ID);
if (point == null)
throw new RuntimeException(IndexingFilter.X_POINT_ID + " not found.");
Extension[] extensions = point.getExtensions();
HashMap<String, IndexingFilter> filterMap =
new HashMap<String, IndexingFilter>();
for (int i = 0; i < extensions.length; i++) {
Extension extension = extensions[i];
IndexingFilter filter = (IndexingFilter) extension
.getExtensionInstance();
LOG.info("Adding " + filter.getClass().getName());
if (!filterMap.containsKey(filter.getClass().getName())) {
filterMap.put(filter.getClass().getName(), filter);
}
}
/*
* If no ordered filters required, just get the filters in an
* indeterminate order
*/
if (orderedFilters == null) {
objectCache.setObject(IndexingFilter.class.getName(),
filterMap.values().toArray(
new IndexingFilter[0]));
/* Otherwise run the filters in the required order */
} else {
ArrayList<IndexingFilter> filters = new ArrayList<IndexingFilter>();
for (int i = 0; i < orderedFilters.length; i++) {
IndexingFilter filter = filterMap
.get(orderedFilters[i]);
if (filter != null) {
filters.add(filter);
}
}
objectCache.setObject(IndexingFilter.class.getName(), filters
.toArray(new IndexingFilter[filters.size()]));
}
} catch (PluginRuntimeException e) {
throw new RuntimeException(e);
}
this.indexingFilters = (IndexingFilter[]) objectCache
.getObject(IndexingFilter.class.getName());
}
}