package org.apache.lucene.search;

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.Random;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Field.Index;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;

public class TestQueryWrapperFilter extends LuceneTestCase {

  public void testBasic() throws Exception {
    Random random = newRandom();
    Directory dir = newDirectory(random);
    RandomIndexWriter writer = new RandomIndexWriter(random, dir);
    Document doc = new Document();
    doc.add(new Field("field", "value", Store.NO, Index.ANALYZED));
    writer.addDocument(doc);
    IndexReader reader = writer.getReader();
    writer.close();

    TermQuery termQuery = new TermQuery(new Term("field", "value"));

    // should not throw exception with primitive query
    QueryWrapperFilter qwf = new QueryWrapperFilter(termQuery);

    IndexSearcher searcher = new IndexSearcher(reader);
    TopDocs hits = searcher.search(new MatchAllDocsQuery(), qwf, 10);
    assertEquals(1, hits.totalHits);
    hits = searcher.search(new MatchAllDocsQuery(), new CachingWrapperFilter(qwf), 10);
    assertEquals(1, hits.totalHits);

    // should not throw exception with complex primitive query
    BooleanQuery booleanQuery = new BooleanQuery();
    booleanQuery.add(termQuery, Occur.MUST);
    booleanQuery.add(new TermQuery(new Term("field", "missing")),
        Occur.MUST_NOT);
    qwf = new QueryWrapperFilter(termQuery);

    hits = searcher.search(new MatchAllDocsQuery(), qwf, 10);
    assertEquals(1, hits.totalHits);
    hits = searcher.search(new MatchAllDocsQuery(), new CachingWrapperFilter(qwf), 10);
    assertEquals(1, hits.totalHits);

    // should not throw exception with non primitive Query (doesn't implement
    // Query#createWeight)
    qwf = new QueryWrapperFilter(new FuzzyQuery(new Term("field", "valu")));

    hits = searcher.search(new MatchAllDocsQuery(), qwf, 10);
    assertEquals(1, hits.totalHits);
    hits = searcher.search(new MatchAllDocsQuery(), new CachingWrapperFilter(qwf), 10);
    assertEquals(1, hits.totalHits);

    // test a query with no hits
    termQuery = new TermQuery(new Term("field", "not_exist"));
    qwf = new QueryWrapperFilter(termQuery);
    hits = searcher.search(new MatchAllDocsQuery(), qwf, 10);
    assertEquals(0, hits.totalHits);
    hits = searcher.search(new MatchAllDocsQuery(), new CachingWrapperFilter(qwf), 10);
    assertEquals(0, hits.totalHits);
    searcher.close();
    reader.close();
    dir.close();
  }
}