@Override
public Query rewrite(IndexReader reader) throws IOException {
SolrRequestInfo info = SolrRequestInfo.getRequestInfo();
CoreContainer container = info.getReq().getCore().getCoreDescriptor().getCoreContainer();
final SolrCore fromCore = container.getCore(fromIndex);
if (fromCore == null) {
throw new SolrException(
SolrException.ErrorCode.BAD_REQUEST, "Cross-core join: no such core " + fromIndex);
}
RefCounted<SolrIndexSearcher> fromHolder = null;
fromHolder = fromCore.getRegisteredSearcher();
final Query joinQuery;
try {
joinQuery =
JoinUtil.createJoinQuery(
fromField, true, toField, fromQuery, fromHolder.get(), scoreMode);
} finally {
fromCore.close();
fromHolder.decref();
}
return joinQuery.rewrite(reader);
}
