Example usage for org.apache.lucene.queryparser.simple SimpleQueryParser SimpleQueryParser

Introduction

In this page you can find the example usage for org.apache.lucene.queryparser.simple SimpleQueryParser SimpleQueryParser.

Prototype

public SimpleQueryParser(Analyzer analyzer, Map<String, Float> weights) 

Source Link

Document

Creates a new parser searching over multiple fields with different weights.

Usage

From source file:io.github.msurdi.redeye.core.lucene.AbstractIndex.java

License:Apache License

/**
 * Retrieve a list of documents matching given query. The query must be a valid lucene query or '*'
 * for matching all documents. If the query is not valid, a best effort search is done.
 *
 * @param q a query string//from   www. j a v a  2  s  .com
 * @return a list of the {@link io.github.msurdi.redeye.api.Indexable} documents matching.
 * @throws IOException
 */
@Override
public List<T> query(String q) throws IOException {
    ensureOpened();

    ArrayList<T> results = Lists.newArrayList();
    Query query;
    try {
        if (MATCH_ALL.equals(q)) {
            query = new MatchAllDocsQuery();
        } else {
            query = new QueryParser(LUCENE_VERSION, DEFAULT_FIELD, analyzer).parse(q);
        }
    } catch (ParseException e) {
        query = new SimpleQueryParser(analyzer, DEFAULT_FIELD).parse(q);
    }

    IndexSearcher searcher = null;

    try {
        searcherManager.maybeRefresh();
        searcher = searcherManager.acquire();
        TopDocs docs = searcher.search(query, Math.max(1, searcher.getIndexReader().maxDoc()));
        for (ScoreDoc scoreDoc : docs.scoreDocs) {
            Document document = searcher.doc(scoreDoc.doc);
            results.add(buildEntity(document));
        }
    } finally {
        searcherManager.release(searcher);
    }

    return results;
}

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