Hi everyone,
I'm modifying a existing custom request handler for an open source project, and
am looking for some help with a compile error around an anonymous
SimpleCollector. The build failure message from ant and the source of the
specific method are below. I am compiling on a Mac with Java 1.8 and Solr
6.4.2. There are two things I do not understand.
First:
[javac]
/Users/tod/src/vufind-browse-handler/browse-handler/java/org/vufind/solr/handler/BrowseRequestHandler.java:445:
error: <anonymous org.vufind.solr.handler.BibDB$1> is not abstract and does
not override abstract method setNextReader(AtomicReaderContext) in Collector
[javac] db.search(q, new SimpleCollector() {
Based on the javadoc, neither SimpleCollector nor Collector define a
setNextReader(AtomicReaderContext) method. Grepping through the Lucene 6.4.2
source reveals neither a setNextReader method (though maybe a couple archaic
comments), nor an AtomicReaderContext class or interface.
Second:
[javac] method IndexSearcher.search(Query,Collector) is not applicable
[javac] (argument mismatch; <anonymous SimpleCollector> cannot be
converted to Collector)
How is it that SimpleCollector cannot be converted to Collector? Perhaps this
is just a consequence of the first error.
Any help getting past this compile problem would be most welcome!
-Tod
Build failure message:
build-handler:
[mkdir] Created dir:
/Users/tod/src/vufind-browse-handler/build/browse-handler
[javac] Compiling 1 source file to
/Users/tod/src/vufind-browse-handler/build/browse-handler
[javac]
/Users/tod/src/vufind-browse-handler/browse-handler/java/org/vufind/solr/handler/BrowseRequestHandler.java:445:
error: <anonymous org.vufind.solr.handler.BibDB$1> is not abstract and does
not override abstract method setNextReader(AtomicReaderContext) in Collector
[javac] db.search(q, new SimpleCollector() {
[javac] ^
[javac]
/Users/tod/src/vufind-browse-handler/browse-handler/java/org/vufind/solr/handler/BrowseRequestHandler.java:445:
error: no suitable method found for search(TermQuery,<anonymous
SimpleCollector>)
[javac] db.search(q, new SimpleCollector() {
[javac] ^
[javac] method IndexSearcher.search(Query,int) is not applicable
[javac] (argument mismatch; <anonymous SimpleCollector> cannot be
converted to int)
[javac] method IndexSearcher.search(Query,Filter,int) is not applicable
[javac] (actual and formal argument lists differ in length)
[javac] method IndexSearcher.search(Query,Filter,Collector) is not
applicable
[javac] (actual and formal argument lists differ in length)
[javac] method IndexSearcher.search(Query,Collector) is not applicable
[javac] (argument mismatch; <anonymous SimpleCollector> cannot be
converted to Collector)
[javac] method IndexSearcher.search(Query,Filter,int,Sort) is not
applicable
[javac] (actual and formal argument lists differ in length)
[javac] method
IndexSearcher.search(Query,Filter,int,Sort,boolean,boolean) is not applicable
[javac] (actual and formal argument lists differ in length)
[javac] method IndexSearcher.search(Query,int,Sort) is not applicable
[javac] (actual and formal argument lists differ in length)
[javac] method IndexSearcher.search(Weight,ScoreDoc,int) is not
applicable
[javac] (actual and formal argument lists differ in length)
[javac] method
IndexSearcher.search(List<AtomicReaderContext>,Weight,ScoreDoc,int) is not
applicable
[javac] (actual and formal argument lists differ in length)
[javac] method IndexSearcher.search(Weight,int,Sort,boolean,boolean) is
not applicable
[javac] (actual and formal argument lists differ in length)
[javac] method
IndexSearcher.search(Weight,FieldDoc,int,Sort,boolean,boolean,boolean) is not
applicable
[javac] (actual and formal argument lists differ in length)
[javac] method
IndexSearcher.search(List<AtomicReaderContext>,Weight,FieldDoc,int,Sort,boolean,boolean,boolean)
is not applicable
[javac] (actual and formal argument lists differ in length)
[javac] method
IndexSearcher.search(List<AtomicReaderContext>,Weight,Collector) is not
applicable
[javac] (actual and formal argument lists differ in length)
[javac] 2 errors
Problem method:
/**
*
* Function to retrieve the doc ids when there is a building limit
* This retrieves the doc ids for an individual heading
*
* Need to add a filter query to limit the results from Solr
*
* Includes functionality to retrieve additional info
* like titles for call numbers, possibly ISBNs
*
* @param heading string of the heading to use for finding matching
* @param fields docs colon-separated string of Solr fields
* to return for use in the browse display
* @param maxBibListSize maximum numbers of records to check for fields
* @return return a map of Solr ids and extra bib info
*/
public Map<String, List<Collection<String>>> matchingIDs(String heading,
String fields,
int maxBibListSize)
throws Exception
{
TermQuery q = new TermQuery(new Term(field, heading));
//Log.info<http://Log.info>("matchingIDs: '" + heading + "': '" +
field);
// bibinfo values are List<Collection> because some extra fields
// may be multi-valued.
// Note: it may be time for bibinfo to become a class...
final Map<String, List<Collection<String>>> bibinfo = new HashMap<> ();
final String[] bibFieldList = fields.split(":");
for (String bibField : bibFieldList) {
bibinfo.put(bibField, new ArrayList<Collection<String>> ());
}
db.search(q, new SimpleCollector() { // <== Compiler error here
private LeafReaderContext context;
public void setScorer(Scorer scorer) {
}
public boolean acceptsDocsOutOfOrder() {
return true;
}
public boolean needsScores() {
return false;
}
public void doSetNextReader(LeafReaderContext context) {
this.context = context;
}
public void collect(int docnum) {
int docid = docnum + context.docBase;
try {
Document doc = db.getIndexReader().document(docid);
for (String bibField : bibFieldList) {
String[] vals = doc.getValues(bibField);
if (vals.length > 0) {
Collection<String> valSet = new LinkedHashSet<> ();
for (String val : vals) {
valSet.add(val);
}
bibinfo.get(bibField).add(valSet);
}
}
} catch (org.apache.lucene.index.CorruptIndexException e) {
Log.info<http://Log.info>("CORRUPT INDEX EXCEPTION. EEK! -
" + e);
} catch (Exception e) {
Log.info<http://Log.info>("Exception thrown: " + e);
}
}
});
return bibinfo;
}
