testspanregexquery.java

一套java版本的搜索引擎源码

package org.apache.lucene.search.regex;

import junit.framework.TestCase;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.analysis.SimpleAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.spans.SpanTermQuery;
import org.apache.lucene.search.spans.SpanNearQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.apache.lucene.search.spans.SpanFirstQuery;

public class TestSpanRegexQuery extends TestCase {
  public void testSpanRegex() throws Exception {
    RAMDirectory directory = new RAMDirectory();
    IndexWriter writer = new IndexWriter(directory, new SimpleAnalyzer(), true);
    Document doc = new Document();
//    doc.add(new Field("field", "the quick brown fox jumps over the lazy dog", Field.Store.NO, Field.Index.TOKENIZED));
//    writer.addDocument(doc);
//    doc = new Document();
    doc.add(new Field("field", "auto update", Field.Store.NO, Field.Index.TOKENIZED));
    writer.addDocument(doc);
    doc = new Document();
    doc.add(new Field("field", "first auto update", Field.Store.NO, Field.Index.TOKENIZED));
    writer.addDocument(doc);
    writer.optimize();
    writer.close();

    IndexSearcher searcher = new IndexSearcher(directory);
    SpanRegexQuery srq = new SpanRegexQuery(new Term("field", "aut.*"));
    SpanFirstQuery sfq = new SpanFirstQuery(srq, 1);
//    SpanNearQuery query = new SpanNearQuery(new SpanQuery[] {srq, stq}, 6, true);
    Hits hits = searcher.search(sfq);
    assertEquals(1, hits.length());
  }
}