package org.apache.lucene.search.suggest;
import java.io.IOException;
import java.util.AbstractMap.SimpleEntry;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.NumericDocValuesField;
import org.apache.lucene.document.StoredField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.StorableField;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.spell.Dictionary;
import org.apache.lucene.search.suggest.DocumentDictionary;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.LuceneTestCase;
import org.junit.Test;
/*
* 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.
*/
public class DocumentDictionaryTest extends LuceneTestCase {
static final String FIELD_NAME = "f1";
static final String WEIGHT_FIELD_NAME = "w1";
static final String PAYLOAD_FIELD_NAME = "p1";
/** Returns Pair(list of invalid document terms, Map of document term -> document) */
private Map.Entry<List<String>, Map<String, Document>> generateIndexDocuments(int ndocs, boolean requiresPayload) {
Map<String, Document> docs = new HashMap<>();
List<String> invalidDocTerms = new ArrayList<>();
for(int i = 0; i < ndocs ; i++) {
Document doc = new Document();
boolean invalidDoc = false;
Field field = null;
// usually have valid term field in document
if (usually()) {
field = new TextField(FIELD_NAME, "field_" + i, Field.Store.YES);
doc.add(field);
} else {
invalidDoc = true;
}
// even if payload is not required usually have it
if (requiresPayload || usually()) {
// usually have valid payload field in document
if (usually()) {
Field payload = new StoredField(PAYLOAD_FIELD_NAME, new BytesRef("payload_" + i));
doc.add(payload);
} else if (requiresPayload) {
invalidDoc = true;
}
}
// usually have valid weight field in document
if (usually()) {
Field weight = (rarely()) ?
new StoredField(WEIGHT_FIELD_NAME, 100d + i) :
new NumericDocValuesField(WEIGHT_FIELD_NAME, 100 + i);
doc.add(weight);
}
String term = null;
if (invalidDoc) {
term = (field!=null) ? field.stringValue() : "invalid_" + i;
invalidDocTerms.add(term);
} else {
term = field.stringValue();
}
docs.put(term, doc);
}
return new SimpleEntry<>(invalidDocTerms, docs);
}
@Test
public void testEmptyReader() throws IOException {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()));
iwc.setMergePolicy(newLogMergePolicy());
// Make sure the index is created?
RandomIndexWriter writer = new RandomIndexWriter(random(), dir, iwc);
writer.commit();
writer.close();
IndexReader ir = DirectoryReader.open(dir);
Dictionary dictionary = new DocumentDictionary(ir, FIELD_NAME, WEIGHT_FIELD_NAME, PAYLOAD_FIELD_NAME);
InputIterator inputIterator = dictionary.getEntryIterator();
assertNull(inputIterator.next());
assertEquals(inputIterator.weight(), 0);
assertNull(inputIterator.payload());
ir.close();
dir.close();
}
@Test
public void testBasic() throws IOException {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()));
iwc.setMergePolicy(newLogMergePolicy());
RandomIndexWriter writer = new RandomIndexWriter(random(), dir, iwc);
Map.Entry<List<String>, Map<String, Document>> res = generateIndexDocuments(atLeast(1000), true);
Map<String, Document> docs = res.getValue();
List<String> invalidDocTerms = res.getKey();
for(Document doc: docs.values()) {
writer.addDocument(doc);
}
writer.commit();
writer.close();
IndexReader ir = DirectoryReader.open(dir);
Dictionary dictionary = new DocumentDictionary(ir, FIELD_NAME, WEIGHT_FIELD_NAME, PAYLOAD_FIELD_NAME);
InputIterator inputIterator = dictionary.getEntryIterator();
BytesRef f;
while((f = inputIterator.next())!=null) {
Document doc = docs.remove(f.utf8ToString());
assertTrue(f.equals(new BytesRef(doc.get(FIELD_NAME))));
Field weightField = doc.getField(WEIGHT_FIELD_NAME);
assertEquals(inputIterator.weight(), (weightField != null) ? weightField.numericValue().longValue() : 0);
assertTrue(inputIterator.payload().equals(doc.getField(PAYLOAD_FIELD_NAME).binaryValue()));
}
for (String invalidTerm : invalidDocTerms) {
assertNotNull(docs.remove(invalidTerm));
}
assertTrue(docs.isEmpty());
ir.close();
dir.close();
}
@Test
public void testWithoutPayload() throws IOException {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()));
iwc.setMergePolicy(newLogMergePolicy());
RandomIndexWriter writer = new RandomIndexWriter(random(), dir, iwc);
Map.Entry<List<String>, Map<String, Document>> res = generateIndexDocuments(atLeast(1000), false);
Map<String, Document> docs = res.getValue();
List<String> invalidDocTerms = res.getKey();
for(Document doc: docs.values()) {
writer.addDocument(doc);
}
writer.commit();
writer.close();
IndexReader ir = DirectoryReader.open(dir);
Dictionary dictionary = new DocumentDictionary(ir, FIELD_NAME, WEIGHT_FIELD_NAME);
InputIterator inputIterator = dictionary.getEntryIterator();
BytesRef f;
while((f = inputIterator.next())!=null) {
Document doc = docs.remove(f.utf8ToString());
assertTrue(f.equals(new BytesRef(doc.get(FIELD_NAME))));
Field weightField = doc.getField(WEIGHT_FIELD_NAME);
assertEquals(inputIterator.weight(), (weightField != null) ? weightField.numericValue().longValue() : 0);
assertEquals(inputIterator.payload(), null);
}
for (String invalidTerm : invalidDocTerms) {
assertNotNull(docs.remove(invalidTerm));
}
assertTrue(docs.isEmpty());
ir.close();
dir.close();
}
@Test
public void testWithDeletions() throws IOException {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(random()));
iwc.setMergePolicy(newLogMergePolicy());
RandomIndexWriter writer = new RandomIndexWriter(random(), dir, iwc);
Map.Entry<List<String>, Map<String, Document>> res = generateIndexDocuments(atLeast(1000), false);
Map<String, Document> docs = res.getValue();
List<String> invalidDocTerms = res.getKey();
Random rand = random();
List<String> termsToDel = new ArrayList<>();
for(Document doc : docs.values()) {
StorableField f = doc.getField(FIELD_NAME);
if(rand.nextBoolean() && f != null && !invalidDocTerms.contains(f.stringValue())) {
termsToDel.add(doc.get(FIELD_NAME));
}
writer.addDocument(doc);
}
writer.commit();
Term[] delTerms = new Term[termsToDel.size()];
for(int i=0; i < termsToDel.size() ; i++) {
delTerms[i] = new Term(FIELD_NAME, termsToDel.get(i));
}
for(Term delTerm: delTerms) {
writer.deleteDocuments(delTerm);
}
writer.commit();
writer.close();
for(String termToDel: termsToDel) {
assertTrue(null!=docs.remove(termToDel));
}
IndexReader ir = DirectoryReader.open(dir);
assertEquals(ir.numDocs(), docs.size());
Dictionary dictionary = new DocumentDictionary(ir, FIELD_NAME, WEIGHT_FIELD_NAME);
InputIterator inputIterator = dictionary.getEntryIterator();
BytesRef f;
while((f = inputIterator.next())!=null) {
Document doc = docs.remove(f.utf8ToString());
assertTrue(f.equals(new BytesRef(doc.get(FIELD_NAME))));
Field weightField = doc.getField(WEIGHT_FIELD_NAME);
assertEquals(inputIterator.weight(), (weightField != null) ? weightField.numericValue().longValue() : 0);
assertEquals(inputIterator.payload(), null);
}
for (String invalidTerm : invalidDocTerms) {
assertNotNull(docs.remove(invalidTerm));
}
assertTrue(docs.isEmpty());
ir.close();
dir.close();
}
}