java - Apache Lucene createWeight() for wildcard query -


i'm using apache lucene 6.6.0 , i'm trying extract terms search query. current version of code looks this:

query parsedquery = new analyzingqueryparser("", analyzer).parse(query); weight weight = parsedquery.createweight(searcher, false); set<term> terms = new hashset<>(); weight.extractterms(terms);

it works pretty fine, noticed doesn't support queries wildcards (i.e. * sign). if query contains wildcard(s), exception:

java.lang.unsupportedoperationexception: query id:123*456 not implement createweight @ org.apache.lucene.search.query.createweight(query.java:66) @ org.apache.lucene.search.indexsearcher.createweight(indexsearcher.java:751) @ org.apache.lucene.search.booleanweight.(booleanweight.java:60) @ org.apache.lucene.search.booleanquery.createweight(booleanquery.java:225)

so there way use createweight() wildcarded queries? or maybe there's way extract search terms query without createweight()?

long story short, necessary rewrite query, example, follows:

final analyzingqueryparser analyzingqueryparser = new analyzingqueryparser("", analyzer);  // todo: rewrite method can overridden. // analyzingqueryparser.setmultitermrewritemethod(multitermquery.constant_score_boolean_rewrite);  query parsedquery = analyzingqueryparser.parse(query); // here parsedquery instance of org.apache.lucene.search.wildcardquery class.  parsedquery = parsedquery.rewrite(reader); // here parsedquery instance of org.apache.lucene.search.multitermqueryconstantscorewrapper class.  final weight weight = parsedquery.createweight(searcher, false); final set<term> terms = new hashset<>(); weight.extractterms(terms);

please refer thread:

for further details.

it seems mentioned stack overflow question one: how matches wildcard query in lucene 6.2.


Comments

Post a Comment

Popular posts from this blog

PHP and MySQL WP -

i trying accomplish 2 things here code. writing php directly wp page using insert php plugin. 1) query mysql database , return results 1 column 4 columns. 2) make each result own hyperlink directs user new wp page runs new query on page. i able query show results , turn results dynamic hyperlink, cannot formatting down. right returns result 1 column. here have: [insert_php] $servername = "localhost"; $username = "login"; //edited privacy $password = "password"; //edited privacy $database = "database"; //edited privacy // create connection $conn = new mysqli($servername, $username, $password, $database); // check connection if ($conn->connect_error) { die("connection failed: " . $conn->connect_error); } echo "connected successfully"; //get results database $result = mysqli_query($conn,"select mine mines order mine"); $all_property = array(); //declare array saving property //showing proper...
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

go - golang pprof for c library code -

i have been trying profile golang application pprof, seems details of c code(linked static library) missed in output result. flame graph from frame graph can see c code time consuming reported within "runtime._externalcode", no details @ all. , sure static library compiled debug enable. so there way make pprof details(like stack trace) of 3rd party c code? or there other golang profiling tool this?
Read more