/*
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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.
*/
using System;
using StandardAnalyzer = Lucene.Net.Analysis.Standard.StandardAnalyzer;
using Document = Lucene.Net.Documents.Document;
using Field = Lucene.Net.Documents.Field;
using IndexReader = Lucene.Net.Index.IndexReader;
using IndexWriter = Lucene.Net.Index.IndexWriter;
using Term = Lucene.Net.Index.Term;
using QueryParser = Lucene.Net.QueryParsers.QueryParser;
using Directory = Lucene.Net.Store.Directory;
using RAMDirectory = Lucene.Net.Store.RAMDirectory;
using NUnit.Framework;
namespace Lucene.Net.Search
{
/// Tests {@link MultiSearcher} class.
///
///
/// $Id: TestMultiSearcher.java,v 1.6 2004/03/02 13:09:57 otis Exp $
///
[TestFixture]
public class TestMultiSearcher
{
/// ReturnS a new instance of the concrete MultiSearcher class
/// used in this test.
///
protected internal virtual MultiSearcher GetMultiSearcherInstance(Searcher[] searchers)
{
return new MultiSearcher(searchers);
}
[Test]
public virtual void TestEmptyIndex()
{
// creating two directories for indices
Directory indexStoreA = new RAMDirectory();
Directory indexStoreB = new RAMDirectory();
// creating a document to store
Document lDoc = new Document();
lDoc.Add(Field.Text("fulltext", "Once upon a time....."));
lDoc.Add(Field.Keyword("id", "doc1"));
lDoc.Add(Field.Keyword("handle", "1"));
// creating a document to store
Document lDoc2 = new Document();
lDoc2.Add(Field.Text("fulltext", "in a galaxy far far away....."));
lDoc2.Add(Field.Keyword("id", "doc2"));
lDoc2.Add(Field.Keyword("handle", "1"));
// creating a document to store
Document lDoc3 = new Document();
lDoc3.Add(Field.Text("fulltext", "a bizarre bug manifested itself...."));
lDoc3.Add(Field.Keyword("id", "doc3"));
lDoc3.Add(Field.Keyword("handle", "1"));
// creating an index writer for the first index
IndexWriter writerA = new IndexWriter(indexStoreA, new StandardAnalyzer(), true);
// creating an index writer for the second index, but writing nothing
IndexWriter writerB = new IndexWriter(indexStoreB, new StandardAnalyzer(), true);
//--------------------------------------------------------------------
// scenario 1
//--------------------------------------------------------------------
// writing the documents to the first index
writerA.AddDocument(lDoc);
writerA.AddDocument(lDoc2);
writerA.AddDocument(lDoc3);
writerA.Optimize();
writerA.Close();
// closing the second index
writerB.Close();
// creating the query
Query query = Lucene.Net.QueryParsers.QueryParser.Parse("handle:1", "fulltext", new StandardAnalyzer());
// building the searchables
Searcher[] searchers = new Searcher[2];
// VITAL STEP:adding the searcher for the empty index first, before the searcher for the populated index
searchers[0] = new IndexSearcher(indexStoreB);
searchers[1] = new IndexSearcher(indexStoreA);
// creating the multiSearcher
Searcher mSearcher = GetMultiSearcherInstance(searchers);
// performing the search
Hits hits = mSearcher.Search(query);
Assert.AreEqual(3, hits.Length());
try
{
// iterating over the hit documents
for (int i = 0; i < hits.Length(); i++)
{
Document d = hits.Doc(i);
}
}
catch (System.IndexOutOfRangeException e)
{
Assert.Fail("ArrayIndexOutOfBoundsException thrown: " + e.Message);
System.Console.Error.WriteLine(e.Source);
}
finally
{
mSearcher.Close();
}
//--------------------------------------------------------------------
// scenario 2
//--------------------------------------------------------------------
// adding one document to the empty index
writerB = new IndexWriter(indexStoreB, new StandardAnalyzer(), false);
writerB.AddDocument(lDoc);
writerB.Optimize();
writerB.Close();
// building the searchables
Searcher[] searchers2 = new Searcher[2];
// VITAL STEP:adding the searcher for the empty index first, before the searcher for the populated index
searchers2[0] = new IndexSearcher(indexStoreB);
searchers2[1] = new IndexSearcher(indexStoreA);
// creating the mulitSearcher
Searcher mSearcher2 = GetMultiSearcherInstance(searchers2);
// performing the same search
Hits hits2 = mSearcher2.Search(query);
Assert.AreEqual(4, hits2.Length());
try
{
// iterating over the hit documents
for (int i = 0; i < hits2.Length(); i++)
{
// no exception should happen at this point
Document d = hits2.Doc(i);
}
}
catch (System.Exception e)
{
Assert.Fail("Exception thrown: " + e.Message);
System.Console.Error.WriteLine(e.Source);
}
finally
{
mSearcher2.Close();
}
//--------------------------------------------------------------------
// scenario 3
//--------------------------------------------------------------------
// deleting the document just added, this will cause a different exception to take place
Term term = new Term("id", "doc1");
IndexReader readerB = IndexReader.Open(indexStoreB);
readerB.Delete(term);
readerB.Close();
// optimizing the index with the writer
writerB = new IndexWriter(indexStoreB, new StandardAnalyzer(), false);
writerB.Optimize();
writerB.Close();
// building the searchables
Searcher[] searchers3 = new Searcher[2];
searchers3[0] = new IndexSearcher(indexStoreB);
searchers3[1] = new IndexSearcher(indexStoreA);
// creating the mulitSearcher
Searcher mSearcher3 = GetMultiSearcherInstance(searchers3);
// performing the same search
Hits hits3 = mSearcher3.Search(query);
Assert.AreEqual(3, hits3.Length());
try
{
// iterating over the hit documents
for (int i = 0; i < hits3.Length(); i++)
{
Document d = hits3.Doc(i);
}
}
catch (System.IO.IOException e)
{
Assert.Fail("IOException thrown: " + e.Message);
System.Console.Error.WriteLine(e.Source);
}
finally
{
mSearcher3.Close();
}
}
}
}