package org.apache.lucene.search;
/**
* 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.
*/
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Searcher;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import junit.framework.TestCase;
import java.io.IOException;
/**
* Tests {@link MultiSearcher} class.
*
* @version $Id: TestMultiSearcher.java 150694 2004-12-05 18:21:58Z bmesser $
*/
public class TestMultiSearcher extends TestCase
{
public TestMultiSearcher(String name)
{
super(name);
}
/**
* ReturnS a new instance of the concrete MultiSearcher class
* used in this test.
*/
protected MultiSearcher getMultiSearcherInstance(Searcher[] searchers) throws IOException {
return new MultiSearcher(searchers);
}
public void testEmptyIndex()
throws Exception
{
// 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 = 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);
assertEquals(3, hits.length());
try {
// iterating over the hit documents
for (int i = 0; i < hits.length(); i++) {
Document d = hits.doc(i);
}
}
catch (ArrayIndexOutOfBoundsException e)
{
fail("ArrayIndexOutOfBoundsException thrown: " + e.getMessage());
e.printStackTrace();
} 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);
assertEquals(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 (Exception e)
{
fail("Exception thrown: " + e.getMessage());
e.printStackTrace();
} 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);
assertEquals(3, hits3.length());
try {
// iterating over the hit documents
for (int i = 0; i < hits3.length(); i++) {
Document d = hits3.doc(i);
}
}
catch (IOException e)
{
fail("IOException thrown: " + e.getMessage());
e.printStackTrace();
} finally{
mSearcher3.close();
}
}
}
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