Highlighting: Automatically use the field values extracted from _source if not stored explicitly in the mapping, closes #561.
This commit is contained in:
kimchy
parent
fe3f5d45de
commit
216b2ab912
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@ -27,9 +27,12 @@ import org.elasticsearch.common.collect.ImmutableMap;
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import org.elasticsearch.index.mapper.DocumentMapper;
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import org.elasticsearch.index.mapper.FieldMapper;
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import org.elasticsearch.index.mapper.Uid;
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import org.elasticsearch.search.SearchException;
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import org.elasticsearch.search.SearchParseElement;
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import org.elasticsearch.search.fetch.FetchPhaseExecutionException;
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import org.elasticsearch.search.fetch.SearchHitPhase;
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import org.elasticsearch.search.highlight.vectorhighlight.SourceScoreOrderFragmentsBuilder;
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import org.elasticsearch.search.highlight.vectorhighlight.SourceSimpleFragmentsBuilder;
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import org.elasticsearch.search.internal.InternalSearchHit;
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import org.elasticsearch.search.internal.SearchContext;
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@ -57,20 +60,19 @@ public class HighlightPhase implements SearchHitPhase {
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Map<String, HighlightField> highlightFields = newHashMap();
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for (SearchContextHighlight.Field field : context.highlight().fields()) {
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String fieldName = field.field();
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FieldMapper mapper = documentMapper.mappers().smartNameFieldMapper(field.field());
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if (mapper != null) {
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fieldName = mapper.names().indexName();
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if (mapper == null) {
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throw new SearchException(context.shardTarget(), "No mapping found for [" + field.field() + "]");
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}
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FastVectorHighlighter highlighter = buildHighlighter(field);
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FastVectorHighlighter highlighter = buildHighlighter(context, mapper, field);
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FieldQuery fieldQuery = buildFieldQuery(highlighter, context.query(), reader, field);
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String[] fragments;
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try {
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// a HACK to make highlighter do highlighting, even though its using the single frag list builder
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int numberOfFragments = field.numberOfFragments() == 0 ? 1 : field.numberOfFragments();
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fragments = highlighter.getBestFragments(fieldQuery, context.searcher().getIndexReader(), docId, fieldName, field.fragmentCharSize(), numberOfFragments);
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fragments = highlighter.getBestFragments(fieldQuery, context.searcher().getIndexReader(), docId, mapper.names().indexName(), field.fragmentCharSize(), numberOfFragments);
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} catch (IOException e) {
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throw new FetchPhaseExecutionException(context, "Failed to highlight field [" + field.field() + "]", e);
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}
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@ -91,18 +93,30 @@ public class HighlightPhase implements SearchHitPhase {
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return new CustomFieldQuery(query, highlighter);
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}
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private FastVectorHighlighter buildHighlighter(SearchContextHighlight.Field field) {
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private FastVectorHighlighter buildHighlighter(SearchContext searchContext, FieldMapper fieldMapper, SearchContextHighlight.Field field) {
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FragListBuilder fragListBuilder;
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FragmentsBuilder fragmentsBuilder;
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if (field.numberOfFragments() == 0) {
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fragListBuilder = new SingleFragListBuilder();
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fragmentsBuilder = new SimpleFragmentsBuilder(field.preTags(), field.postTags());
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if (fieldMapper.stored()) {
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fragmentsBuilder = new SimpleFragmentsBuilder(field.preTags(), field.postTags());
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} else {
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fragmentsBuilder = new SourceSimpleFragmentsBuilder(fieldMapper, searchContext, field.preTags(), field.postTags());
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}
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} else {
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fragListBuilder = new SimpleFragListBuilder();
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if (field.scoreOrdered()) {
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fragmentsBuilder = new ScoreOrderFragmentsBuilder(field.preTags(), field.postTags());
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if (fieldMapper.stored()) {
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fragmentsBuilder = new ScoreOrderFragmentsBuilder(field.preTags(), field.postTags());
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} else {
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fragmentsBuilder = new SourceScoreOrderFragmentsBuilder(fieldMapper, searchContext, field.preTags(), field.postTags());
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}
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} else {
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fragmentsBuilder = new SimpleFragmentsBuilder(field.preTags(), field.postTags());
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if (fieldMapper.stored()) {
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fragmentsBuilder = new SimpleFragmentsBuilder(field.preTags(), field.postTags());
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} else {
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fragmentsBuilder = new SourceSimpleFragmentsBuilder(fieldMapper, searchContext, field.preTags(), field.postTags());
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}
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}
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}
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@ -0,0 +1,61 @@
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/*
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* Licensed to Elastic Search and Shay Banon under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. Elastic Search licenses this
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* file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.elasticsearch.search.highlight.vectorhighlight;
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import org.apache.lucene.document.Field;
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import org.apache.lucene.index.IndexReader;
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import org.apache.lucene.search.vectorhighlight.ScoreOrderFragmentsBuilder;
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import org.elasticsearch.index.mapper.FieldMapper;
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import org.elasticsearch.search.internal.SearchContext;
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import org.elasticsearch.search.lookup.SearchLookup;
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import java.io.IOException;
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import java.util.List;
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/**
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* @author kimchy (shay.banon)
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*/
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public class SourceScoreOrderFragmentsBuilder extends ScoreOrderFragmentsBuilder {
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private final FieldMapper mapper;
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private final SearchContext searchContext;
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public SourceScoreOrderFragmentsBuilder(FieldMapper mapper, SearchContext searchContext,
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String[] preTags, String[] postTags) {
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super(preTags, postTags);
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this.mapper = mapper;
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this.searchContext = searchContext;
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}
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@Override protected Field[] getFields(IndexReader reader, int docId, String fieldName) throws IOException {
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// we know its low level reader, and matching docId, since that's how we call the highlighter with
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SearchLookup lookup = searchContext.lookup();
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lookup.setNextReader(reader);
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lookup.setNextDocId(docId);
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List<Object> values = lookup.source().getValues(mapper.names().fullName());
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Field[] fields = new Field[values.size()];
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for (int i = 0; i < values.size(); i++) {
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fields[i] = new Field(mapper.names().indexName(), values.get(i).toString(), Field.Store.NO, Field.Index.ANALYZED);
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}
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return fields;
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}
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}
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@ -0,0 +1,67 @@
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/*
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* Licensed to Elastic Search and Shay Banon under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. Elastic Search licenses this
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* file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.elasticsearch.search.highlight.vectorhighlight;
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import org.apache.lucene.document.Field;
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import org.apache.lucene.index.IndexReader;
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import org.apache.lucene.search.vectorhighlight.SimpleFragmentsBuilder;
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import org.elasticsearch.index.mapper.FieldMapper;
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import org.elasticsearch.search.internal.SearchContext;
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import org.elasticsearch.search.lookup.SearchLookup;
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import java.io.IOException;
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import java.util.List;
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/**
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* @author kimchy (shay.banon)
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*/
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public class SourceSimpleFragmentsBuilder extends SimpleFragmentsBuilder {
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private final FieldMapper mapper;
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private final SearchContext searchContext;
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public SourceSimpleFragmentsBuilder(FieldMapper mapper, SearchContext searchContext,
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String[] preTags, String[] postTags) {
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super(preTags, postTags);
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this.mapper = mapper;
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this.searchContext = searchContext;
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}
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public static Field[] EMPTY_FIELDS = new Field[0];
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@Override protected Field[] getFields(IndexReader reader, int docId, String fieldName) throws IOException {
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// we know its low level reader, and matching docId, since that's how we call the highlighter with
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SearchLookup lookup = searchContext.lookup();
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lookup.setNextReader(reader);
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lookup.setNextDocId(docId);
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List<Object> values = lookup.source().getValues(mapper.names().fullName());
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if (values.isEmpty()) {
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return EMPTY_FIELDS;
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}
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Field[] fields = new Field[values.size()];
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for (int i = 0; i < values.size(); i++) {
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fields[i] = new Field(mapper.names().indexName(), values.get(i).toString(), Field.Store.NO, Field.Index.ANALYZED);
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}
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return fields;
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}
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}
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@ -23,6 +23,7 @@ import org.apache.lucene.document.Document;
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import org.apache.lucene.document.Fieldable;
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import org.apache.lucene.index.IndexReader;
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import org.elasticsearch.ElasticSearchParseException;
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import org.elasticsearch.common.collect.Lists;
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import org.elasticsearch.common.compress.lzf.LZFDecoder;
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import org.elasticsearch.common.io.stream.BytesStreamInput;
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import org.elasticsearch.common.io.stream.CachedStreamInput;
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@ -34,12 +35,15 @@ import org.elasticsearch.index.mapper.SourceFieldMapper;
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import org.elasticsearch.index.mapper.SourceFieldSelector;
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import java.util.Collection;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.regex.Pattern;
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/**
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* @author kimchy (shay.banon)
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*/
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// TODO: If we are processing it in the per hit fetch phase, we cna initialize it with a source if it was loaded..
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public class SourceLookup implements Map {
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private IndexReader reader;
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@ -99,6 +103,54 @@ public class SourceLookup implements Map {
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this.source = null;
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}
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private final static Pattern dotPattern = Pattern.compile("\\.");
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/**
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* Returns the values associated with the path. Those are "low" level values, and it can
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* handle path expression where an array/list is navigated within.
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*/
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public List<Object> getValues(String path) {
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List<Object> values = Lists.newArrayList();
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String[] pathElements = dotPattern.split(path);
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getValues(values, loadSourceIfNeeded(), pathElements, 0);
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return values;
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}
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@SuppressWarnings({"unchecked"})
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private void getValues(List<Object> values, Map<String, Object> part, String[] pathElements, int index) {
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if (index == pathElements.length) {
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return;
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}
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String currentPath = pathElements[index];
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Object currentValue = part.get(currentPath);
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if (currentValue == null) {
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return;
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}
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if (currentValue instanceof Map) {
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getValues(values, (Map<String, Object>) currentValue, pathElements, index + 1);
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} else if (currentValue instanceof List) {
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getValues(values, (List<Object>) currentValue, pathElements, index + 1);
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} else {
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values.add(currentValue);
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}
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}
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@SuppressWarnings({"unchecked"})
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private void getValues(List<Object> values, List<Object> part, String[] pathElements, int index) {
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for (Object value : part) {
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if (value == null) {
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continue;
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}
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if (value instanceof Map) {
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getValues(values, (Map<String, Object>) value, pathElements, index);
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} else if (value instanceof List) {
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getValues(values, (List<Object>) value, pathElements, index);
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} else {
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values.add(value);
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}
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}
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}
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@Override public Object get(Object key) {
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return loadSourceIfNeeded().get(key);
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}
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@ -0,0 +1,104 @@
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/*
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* Licensed to Elastic Search and Shay Banon under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. Elastic Search licenses this
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* file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.elasticsearch.test.integration.search.highlight;
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import org.elasticsearch.action.search.SearchResponse;
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import org.elasticsearch.client.Client;
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import org.elasticsearch.common.settings.ImmutableSettings;
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import org.elasticsearch.common.xcontent.XContentFactory;
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import org.elasticsearch.search.SearchHit;
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import org.elasticsearch.test.integration.AbstractNodesTests;
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import org.testng.annotations.AfterClass;
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import org.testng.annotations.BeforeClass;
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import org.testng.annotations.Test;
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import static org.elasticsearch.common.xcontent.XContentFactory.*;
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import static org.elasticsearch.index.query.xcontent.QueryBuilders.*;
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import static org.hamcrest.MatcherAssert.*;
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import static org.hamcrest.Matchers.*;
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/**
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* @author kimchy (shay.banon)
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*/
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public class SourceFieldHighlightingTests extends AbstractNodesTests {
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private Client client;
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@BeforeClass public void createNodes() throws Exception {
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startNode("node1");
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client = getClient();
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}
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@AfterClass public void closeNodes() {
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client.close();
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closeAllNodes();
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}
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protected Client getClient() {
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return client("node1");
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}
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@Test public void testSourceLookupHighlighting() throws Exception {
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try {
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client.admin().indices().prepareDelete("test").execute().actionGet();
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} catch (Exception e) {
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// ignore
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}
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client.admin().indices().prepareCreate("test").setSettings(ImmutableSettings.settingsBuilder().put("number_of_shards", 2))
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.addMapping("type1", jsonBuilder().startObject().startObject("type1").startObject("properties")
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// we don't store title, now lets see if it works...
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.startObject("title").field("type", "string").field("store", "no").field("term_vector", "with_positions_offsets").endObject()
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.startObject("attachments").startObject("properties").startObject("body").field("type", "string").field("term_vector", "with_positions_offsets").endObject().endObject().endObject()
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.endObject().endObject().endObject())
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.execute().actionGet();
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for (int i = 0; i < 5; i++) {
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client.prepareIndex("test", "type1", Integer.toString(i))
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.setSource(XContentFactory.jsonBuilder().startObject()
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.field("title", "This is a test on the highlighting bug present in elasticsearch")
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.startArray("attachments").startObject().field("body", "attachment 1").endObject().startObject().field("body", "attachment 2").endObject().endArray()
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.endObject())
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.setRefresh(true).execute().actionGet();
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}
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SearchResponse search = client.prepareSearch()
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.setQuery(fieldQuery("title", "bug"))
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.addHighlightedField("title", -1, 0)
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.execute().actionGet();
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assertThat(search.hits().totalHits(), equalTo(5l));
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for (SearchHit hit : search.hits()) {
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assertThat(hit.highlightFields().get("title").fragments()[0], equalTo("This is a test on the highlighting <em>bug</em> present in elasticsearch"));
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}
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search = client.prepareSearch()
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.setQuery(fieldQuery("attachments.body", "attachment"))
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.addHighlightedField("attachments.body", -1, 0)
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.execute().actionGet();
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assertThat(search.hits().totalHits(), equalTo(5l));
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for (SearchHit hit : search.hits()) {
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assertThat(hit.highlightFields().get("attachments.body").fragments()[0], equalTo("<em>attachment</em> 1 <em>attachment</em> 2"));
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}
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}
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}
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