Example usage for org.apache.lucene.search TopDocsCollector topDocs

Introduction

In this page you can find the example usage for org.apache.lucene.search TopDocsCollector topDocs.

Prototype

public TopDocs topDocs(int start) 

Source Link

Document

Returns the documents in the range [start ..

Usage

From source file:org.wso2.carbon.analytics.dataservice.core.indexing.AnalyticsDataIndexer.java

License:Open Source License

@SuppressWarnings("rawtypes")
private List<SearchResultEntry> doSearch(Set<Integer> shardIndices, int tenantId, String tableName,
        String query, int start, int count, List<SortByField> sortByFields) throws AnalyticsIndexException {
    List<SearchResultEntry> results = new ArrayList<>();
    IndexReader reader = null;/* ww  w  .  j av  a 2s  . co  m*/
    ExecutorService searchExecutor = Executors.newCachedThreadPool();
    if (count <= 0) {
        log.error("Record Count/Page size is ZERO!. Please set Record count/Page size.");
    }
    try {
        reader = this.getCombinedIndexReader(shardIndices, tenantId, tableName);
        IndexSearcher searcher = new IndexSearcher(reader, searchExecutor);
        Map<String, ColumnDefinition> indices = this.lookupIndices(tenantId, tableName);
        Query indexQuery = getSearchQueryFromString(query, indices);
        TopDocsCollector collector = getTopDocsCollector(start, count, sortByFields, indices);
        searcher.search(indexQuery, collector);
        ScoreDoc[] hits = collector.topDocs(start).scoreDocs;
        Document indexDoc;
        for (ScoreDoc doc : hits) {
            indexDoc = searcher.doc(doc.doc);
            results.add(new SearchResultEntry(indexDoc.get(INDEX_ID_INTERNAL_FIELD), doc.score));
        }
        if (log.isDebugEnabled()) {
            log.debug("Local Search: " + results.size());
        }
        return results;
    } catch (Exception e) {
        log.error("Error in index search: " + e.getMessage(), e);
        throw new AnalyticsIndexException("Error in index search: " + e.getMessage(), e);
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                log.error("Error in closing the reader: " + e.getMessage(), e);
                ;
            }
        }
        searchExecutor.shutdown();
    }
}

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