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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
*/
package org.elasticsearch.percolator;
import com.carrotsearch.hppc.FloatArrayList;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.*;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.lucene.Lucene;
import org.elasticsearch.common.lucene.search.Queries;
import org.elasticsearch.index.fielddata.IndexFieldData;
import org.elasticsearch.index.fielddata.SortedBinaryDocValues;
import org.elasticsearch.index.mapper.MappedFieldType;
import org.elasticsearch.index.mapper.Uid;
import org.elasticsearch.index.mapper.internal.UidFieldMapper;
import org.elasticsearch.index.query.ParsedQuery;
import org.elasticsearch.search.aggregations.Aggregator;
import org.elasticsearch.search.aggregations.BucketCollector;
import org.elasticsearch.search.aggregations.bucket.global.GlobalAggregator;
import org.elasticsearch.search.aggregations.support.AggregationContext;
import org.elasticsearch.search.highlight.HighlightField;
import org.elasticsearch.search.highlight.HighlightPhase;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentMap;
/**
*/
abstract class QueryCollector extends SimpleCollector {
final IndexFieldData uidFieldData;
final IndexSearcher searcher;
final ConcurrentMap queries;
final ESLogger logger;
boolean isNestedDoc = false;
BytesRef current;
SortedBinaryDocValues values;
final BucketCollector aggregatorCollector;
LeafCollector aggregatorLeafCollector;
QueryCollector(ESLogger logger, PercolateContext context, boolean isNestedDoc) throws IOException {
this.logger = logger;
this.queries = context.percolateQueries();
this.searcher = context.docSearcher();
final MappedFieldType uidMapper = context.mapperService().smartNameFieldType(UidFieldMapper.NAME);
this.uidFieldData = context.fieldData().getForField(uidMapper);
this.isNestedDoc = isNestedDoc;
List aggregatorCollectors = new ArrayList<>();
if (context.aggregations() != null) {
AggregationContext aggregationContext = new AggregationContext(context);
context.aggregations().aggregationContext(aggregationContext);
Aggregator[] aggregators = context.aggregations().factories().createTopLevelAggregators(aggregationContext);
for (int i = 0; i < aggregators.length; i++) {
if (!(aggregators[i] instanceof GlobalAggregator)) {
Aggregator aggregator = aggregators[i];
aggregatorCollectors.add(aggregator);
}
}
context.aggregations().aggregators(aggregators);
}
aggregatorCollector = BucketCollector.wrap(aggregatorCollectors);
aggregatorCollector.preCollection();
}
public void postMatch(int doc) throws IOException {
aggregatorLeafCollector.collect(doc);
}
@Override
public void setScorer(Scorer scorer) throws IOException {
aggregatorLeafCollector.setScorer(scorer);
}
@Override
public boolean needsScores() {
return aggregatorCollector.needsScores();
}
@Override
public void doSetNextReader(LeafReaderContext context) throws IOException {
// we use the UID because id might not be indexed
values = uidFieldData.load(context).getBytesValues();
aggregatorLeafCollector = aggregatorCollector.getLeafCollector(context);
}
static Match match(ESLogger logger, PercolateContext context, HighlightPhase highlightPhase, boolean isNestedDoc) throws IOException {
return new Match(logger, context, highlightPhase, isNestedDoc);
}
static Count count(ESLogger logger, PercolateContext context, boolean isNestedDoc) throws IOException {
return new Count(logger, context, isNestedDoc);
}
static MatchAndScore matchAndScore(ESLogger logger, PercolateContext context, HighlightPhase highlightPhase, boolean isNestedDoc) throws IOException {
return new MatchAndScore(logger, context, highlightPhase, isNestedDoc);
}
static MatchAndSort matchAndSort(ESLogger logger, PercolateContext context, boolean isNestedDoc) throws IOException {
return new MatchAndSort(logger, context, isNestedDoc);
}
protected final Query getQuery(int doc) {
values.setDocument(doc);
final int numValues = values.count();
if (numValues == 0) {
return null;
}
assert numValues == 1;
current = Uid.splitUidIntoTypeAndId(values.valueAt(0))[1];
return queries.get(current);
}
final static class Match extends QueryCollector {
final PercolateContext context;
final HighlightPhase highlightPhase;
final List matches = new ArrayList<>();
final List> hls = new ArrayList<>();
final boolean limit;
final int size;
long counter = 0;
Match(ESLogger logger, PercolateContext context, HighlightPhase highlightPhase, boolean isNestedDoc) throws IOException {
super(logger, context, isNestedDoc);
this.limit = context.limit;
this.size = context.size();
this.context = context;
this.highlightPhase = highlightPhase;
}
@Override
public void collect(int doc) throws IOException {
final Query query = getQuery(doc);
if (query == null) {
// log???
return;
}
Query existsQuery = query;
if (isNestedDoc) {
existsQuery = new BooleanQuery.Builder()
.add(existsQuery, Occur.MUST)
.add(Queries.newNonNestedFilter(), Occur.FILTER)
.build();
}
// run the query
try {
if (context.highlight() != null) {
context.parsedQuery(new ParsedQuery(query));
context.hitContext().cache().clear();
}
if (Lucene.exists(searcher, existsQuery)) {
if (!limit || counter < size) {
matches.add(BytesRef.deepCopyOf(current));
if (context.highlight() != null) {
highlightPhase.hitExecute(context, context.hitContext());
hls.add(context.hitContext().hit().getHighlightFields());
}
}
counter++;
postMatch(doc);
}
} catch (IOException e) {
logger.warn("[" + current.utf8ToString() + "] failed to execute query", e);
}
}
long counter() {
return counter;
}
List matches() {
return matches;
}
List> hls() {
return hls;
}
}
final static class MatchAndSort extends QueryCollector {
private final TopScoreDocCollector topDocsCollector;
private LeafCollector topDocsLeafCollector;
MatchAndSort(ESLogger logger, PercolateContext context, boolean isNestedDoc) throws IOException {
super(logger, context, isNestedDoc);
// TODO: Use TopFieldCollector.create(...) for ascending and descending scoring?
topDocsCollector = TopScoreDocCollector.create(context.size());
}
@Override
public boolean needsScores() {
return super.needsScores() || topDocsCollector.needsScores();
}
@Override
public void collect(int doc) throws IOException {
final Query query = getQuery(doc);
if (query == null) {
// log???
return;
}
Query existsQuery = query;
if (isNestedDoc) {
existsQuery = new BooleanQuery.Builder()
.add(existsQuery, Occur.MUST)
.add(Queries.newNonNestedFilter(), Occur.FILTER)
.build();
}
// run the query
try {
if (Lucene.exists(searcher, existsQuery)) {
topDocsLeafCollector.collect(doc);
postMatch(doc);
}
} catch (IOException e) {
logger.warn("[" + current.utf8ToString() + "] failed to execute query", e);
}
}
@Override
public void doSetNextReader(LeafReaderContext context) throws IOException {
super.doSetNextReader(context);
topDocsLeafCollector = topDocsCollector.getLeafCollector(context);
}
@Override
public void setScorer(Scorer scorer) throws IOException {
topDocsLeafCollector.setScorer(scorer);
}
TopDocs topDocs() {
return topDocsCollector.topDocs();
}
}
final static class MatchAndScore extends QueryCollector {
final PercolateContext context;
final HighlightPhase highlightPhase;
final List matches = new ArrayList<>();
final List> hls = new ArrayList<>();
// TODO: Use thread local in order to cache the scores lists?
final FloatArrayList scores = new FloatArrayList();
final boolean limit;
final int size;
long counter = 0;
private Scorer scorer;
MatchAndScore(ESLogger logger, PercolateContext context, HighlightPhase highlightPhase, boolean isNestedDoc) throws IOException {
super(logger, context, isNestedDoc);
this.limit = context.limit;
this.size = context.size();
this.context = context;
this.highlightPhase = highlightPhase;
}
@Override
public boolean needsScores() {
return true;
}
@Override
public void collect(int doc) throws IOException {
final Query query = getQuery(doc);
if (query == null) {
// log???
return;
}
Query existsQuery = query;
if (isNestedDoc) {
existsQuery = new BooleanQuery.Builder()
.add(existsQuery, Occur.MUST)
.add(Queries.newNonNestedFilter(), Occur.FILTER)
.build();
}
// run the query
try {
if (context.highlight() != null) {
context.parsedQuery(new ParsedQuery(query));
context.hitContext().cache().clear();
}
if (Lucene.exists(searcher, existsQuery)) {
if (!limit || counter < size) {
matches.add(BytesRef.deepCopyOf(current));
scores.add(scorer.score());
if (context.highlight() != null) {
highlightPhase.hitExecute(context, context.hitContext());
hls.add(context.hitContext().hit().getHighlightFields());
}
}
counter++;
postMatch(doc);
}
} catch (IOException e) {
logger.warn("[" + current.utf8ToString() + "] failed to execute query", e);
}
}
@Override
public void setScorer(Scorer scorer) throws IOException {
this.scorer = scorer;
}
long counter() {
return counter;
}
List matches() {
return matches;
}
FloatArrayList scores() {
return scores;
}
List> hls() {
return hls;
}
}
final static class Count extends QueryCollector {
private long counter = 0;
Count(ESLogger logger, PercolateContext context, boolean isNestedDoc) throws IOException {
super(logger, context, isNestedDoc);
}
@Override
public void collect(int doc) throws IOException {
final Query query = getQuery(doc);
if (query == null) {
// log???
return;
}
Query existsQuery = query;
if (isNestedDoc) {
existsQuery = new BooleanQuery.Builder()
.add(existsQuery, Occur.MUST)
.add(Queries.newNonNestedFilter(), Occur.FILTER)
.build();
}
// run the query
try {
if (Lucene.exists(searcher, existsQuery)) {
counter++;
postMatch(doc);
}
} catch (IOException e) {
logger.warn("[" + current.utf8ToString() + "] failed to execute query", e);
}
}
long counter() {
return counter;
}
}
}