mirror of https://github.com/apache/lucene.git
LUCENE-4734: Add FastVectorHighlighter support for proximity queries and phrase queries with gaps or overlapping terms.
git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1504862 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Adrien Grand
parent
fe8b2147b7
commit
1dcde887d8
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@ -82,6 +82,11 @@ Optimizations
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* LUCENE-5088: Added TermFilter to filter docs by a specific term.
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(Martijn van Groningen)
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Bug fixes
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* LUCENE-4734: Add FastVectorHighlighter support for proximity queries and
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phrase queries with gaps or overlapping terms. (Ryan Lauck, Adrien Grand)
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======================= Lucene 4.4.0 =======================
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Changes in backwards compatibility policy
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@ -16,7 +16,9 @@ package org.apache.lucene.search.vectorhighlight;
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* limitations under the License.
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*/
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import java.util.ArrayDeque;
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import java.util.ArrayList;
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import java.util.Deque;
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import java.util.LinkedList;
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import java.util.List;
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@ -60,50 +62,74 @@ public class FieldPhraseList {
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public FieldPhraseList( FieldTermStack fieldTermStack, FieldQuery fieldQuery, int phraseLimit ){
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final String field = fieldTermStack.getFieldName();
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LinkedList<TermInfo> phraseCandidate = new LinkedList<TermInfo>();
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QueryPhraseMap currMap = null;
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QueryPhraseMap nextMap = null;
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while( !fieldTermStack.isEmpty() && (phraseList.size() < phraseLimit) )
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{
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phraseCandidate.clear();
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TermInfo ti = fieldTermStack.pop();
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currMap = fieldQuery.getFieldTermMap( field, ti.getText() );
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// if not found, discard top TermInfo from stack, then try next element
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if( currMap == null ) continue;
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// if found, search the longest phrase
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phraseCandidate.add( ti );
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while( true ){
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ti = fieldTermStack.pop();
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nextMap = null;
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if( ti != null )
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nextMap = currMap.getTermMap( ti.getText() );
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if( ti == null || nextMap == null ){
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if( ti != null )
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fieldTermStack.push( ti );
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if( currMap.isValidTermOrPhrase( phraseCandidate ) ){
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addIfNoOverlap( new WeightedPhraseInfo( phraseCandidate, currMap.getBoost(), currMap.getTermOrPhraseNumber() ) );
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}
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else{
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while( phraseCandidate.size() > 1 ){
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fieldTermStack.push( phraseCandidate.removeLast() );
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currMap = fieldQuery.searchPhrase( field, phraseCandidate );
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if( currMap != null ){
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addIfNoOverlap( new WeightedPhraseInfo( phraseCandidate, currMap.getBoost(), currMap.getTermOrPhraseNumber() ) );
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break;
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}
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}
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}
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break;
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@SuppressWarnings("unchecked")
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Deque<TermInfo>[] termStacks = new Deque[] {new ArrayDeque<TermInfo>()};
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for (TermInfo ti = fieldTermStack.pop(); ti != null; ti = fieldTermStack.pop()) {
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// If there are tokens at the same position, compute all combinations
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if (!fieldTermStack.isEmpty() && fieldTermStack.peek().getPosition() == ti.getPosition()) {
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List<TermInfo> samePositionTermInfos = new ArrayList<>(2);
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samePositionTermInfos.add(ti);
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samePositionTermInfos.add(fieldTermStack.pop());
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while (!fieldTermStack.isEmpty() && fieldTermStack.peek().getPosition() == ti.getPosition()) {
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samePositionTermInfos.add(fieldTermStack.pop());
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}
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else{
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phraseCandidate.add( ti );
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currMap = nextMap;
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final int numTokensAtSamePosition = samePositionTermInfos.size();
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@SuppressWarnings("unchecked")
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Deque<TermInfo>[] newTermStacks = new Deque[termStacks.length * numTokensAtSamePosition];
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for (int i = 0, k = 0; i < termStacks.length; ++i) {
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for (int j = 0; j < numTokensAtSamePosition; ++j) {
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if (j == numTokensAtSamePosition - 1) {
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newTermStacks[k] = termStacks[i];
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} else {
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newTermStacks[k] = new ArrayDeque<>(termStacks[i]);
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}
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newTermStacks[k++].offer(samePositionTermInfos.get(j));
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}
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}
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termStacks = newTermStacks;
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} else {
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for (Deque<TermInfo> d : termStacks) {
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d.offer(ti);
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}
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}
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}
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for (Deque<TermInfo> d : termStacks) {
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extractPhrases(field, d, fieldQuery, phraseLimit);
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}
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}
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void extractPhrases(String field, Deque<TermInfo> fieldTermStack, FieldQuery fieldQuery, int phraseLimit) {
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LinkedList<TermInfo> phraseCandidate = new LinkedList<TermInfo>();
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while( !fieldTermStack.isEmpty() && (phraseList.size() < phraseLimit) ) {
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int longest = 0;
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phraseCandidate.clear();
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QueryPhraseMap currMap = null;
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for (TermInfo ti : fieldTermStack) {
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QueryPhraseMap nextMap = null;
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if (currMap == null) {
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nextMap = fieldQuery.getFieldTermMap(field, ti.getText());
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if (nextMap == null) {
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break;
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}
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} else {
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nextMap = currMap.getTermMap(ti.getText());
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}
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if (nextMap != null) {
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currMap = nextMap;
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phraseCandidate.add(ti);
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if( currMap.isValidTermOrPhrase( phraseCandidate ) ){
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longest = phraseCandidate.size();
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}
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}
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}
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if (longest > 0) {
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addIfNoOverlap( new WeightedPhraseInfo( phraseCandidate.subList(0, longest), currMap.getBoost(), currMap.getTermOrPhraseNumber() ) );
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}
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fieldTermStack.pop();
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}
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}
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public void addIfNoOverlap( WeightedPhraseInfo wpi ){
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@ -159,11 +185,11 @@ public class FieldPhraseList {
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return termsInfos;
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}
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public WeightedPhraseInfo( LinkedList<TermInfo> terms, float boost ){
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public WeightedPhraseInfo( List<TermInfo> terms, float boost ){
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this( terms, boost, 0 );
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}
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public WeightedPhraseInfo( LinkedList<TermInfo> terms, float boost, int seqnum ){
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public WeightedPhraseInfo( List<TermInfo> terms, float boost, int seqnum ){
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this.boost = boost;
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this.seqnum = seqnum;
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@ -17,6 +17,8 @@ package org.apache.lucene.search.vectorhighlight;
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*/
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.HashSet;
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@ -39,6 +41,7 @@ import org.apache.lucene.search.PhraseQuery;
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import org.apache.lucene.search.Query;
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import org.apache.lucene.search.TermQuery;
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import org.apache.lucene.search.vectorhighlight.FieldTermStack.TermInfo;
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import org.apache.lucene.util.InPlaceMergeSorter;
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/**
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* FieldQuery breaks down query object into terms/phrases and keeps
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@ -347,6 +350,7 @@ public class FieldQuery {
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boolean terminal;
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int slop; // valid if terminal == true and phraseHighlight == true
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float boost; // valid if terminal == true
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int[] positions; // valid if terminal == true
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int termOrPhraseNumber; // valid if terminal == true
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FieldQuery fieldQuery;
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Map<String, QueryPhraseMap> subMap = new HashMap<String, QueryPhraseMap>();
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@ -369,38 +373,107 @@ public class FieldQuery {
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return map;
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}
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void add( Query query, IndexReader reader ) {
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void add( Query query, IndexReader reader ) {
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if( query instanceof TermQuery ){
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addTerm( ((TermQuery)query).getTerm(), query.getBoost() );
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}
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else if( query instanceof PhraseQuery ){
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PhraseQuery pq = (PhraseQuery)query;
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Term[] terms = pq.getTerms();
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Map<String, QueryPhraseMap> map = subMap;
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QueryPhraseMap qpm = null;
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for( Term term : terms ){
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qpm = getOrNewMap( map, term.text() );
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map = qpm.subMap;
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}
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qpm.markTerminal( pq.getSlop(), pq.getBoost() );
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final Term[] terms = pq.getTerms();
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final int[] positions = pq.getPositions();
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new InPlaceMergeSorter() {
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@Override
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protected void swap(int i, int j) {
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Term tmpTerm = terms[i];
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terms[i] = terms[j];
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terms[j] = tmpTerm;
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int tmpPos = positions[i];
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positions[i] = positions[j];
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positions[j] = tmpPos;
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}
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@Override
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protected int compare(int i, int j) {
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return positions[i] - positions[j];
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}
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}.sort(0, terms.length);
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addToMap(pq, terms, positions, 0, subMap, pq.getSlop());
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}
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else
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throw new RuntimeException( "query \"" + query.toString() + "\" must be flatten first." );
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}
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private int numTermsAtSamePosition(int[] positions, int i) {
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int numTermsAtSamePosition = 1;
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for (int j = i + 1; j < positions.length; ++j) {
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if (positions[j] == positions[i]) {
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++numTermsAtSamePosition;
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}
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}
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return numTermsAtSamePosition;
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}
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private void addToMap(PhraseQuery pq, Term[] terms, int[] positions, int i, Map<String, QueryPhraseMap> map, int slop) {
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int numTermsAtSamePosition = numTermsAtSamePosition(positions, i);
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for (int j = 0; j < numTermsAtSamePosition; ++j) {
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QueryPhraseMap qpm = getOrNewMap(map, terms[i + j].text());
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if (i + numTermsAtSamePosition == terms.length) {
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qpm.markTerminal(pq.getSlop(), pq.getBoost(), uniquePositions(positions));
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} else {
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addToMap(pq, terms, positions, i + numTermsAtSamePosition, qpm.subMap, slop);
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}
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}
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if (slop > 2 && i + numTermsAtSamePosition < terms.length) {
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Term[] otherTerms = Arrays.copyOf(terms, terms.length);
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int[] otherPositions = Arrays.copyOf(positions, positions.length);
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final int nextTermAtSamePosition = numTermsAtSamePosition(positions, i + numTermsAtSamePosition);
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System.arraycopy(terms, i + numTermsAtSamePosition, otherTerms, i, nextTermAtSamePosition);
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System.arraycopy(positions, i + numTermsAtSamePosition, otherPositions, i, nextTermAtSamePosition);
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System.arraycopy(terms, i, otherTerms, i + nextTermAtSamePosition, numTermsAtSamePosition);
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System.arraycopy(positions, i, otherPositions, i + nextTermAtSamePosition, numTermsAtSamePosition);
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addToMap(pq, otherTerms, otherPositions, i, map, slop - 2);
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}
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}
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private int[] uniquePositions(int[] positions) {
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int uniqueCount = 1;
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for (int i = 1; i < positions.length; ++i) {
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if (positions[i] != positions[i - 1]) {
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++uniqueCount;
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}
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}
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if (uniqueCount == positions.length) {
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return positions;
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}
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int[] result = new int[uniqueCount];
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result[0] = positions[0];
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for (int i = 1, j = 1; i < positions.length; ++i) {
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if (positions[i] != positions[i - 1]) {
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result[j++] = positions[i];
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}
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}
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return result;
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}
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public QueryPhraseMap getTermMap( String term ){
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return subMap.get( term );
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}
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private void markTerminal( float boost ){
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markTerminal( 0, boost );
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markTerminal( 0, boost, null );
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}
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private void markTerminal( int slop, float boost ){
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this.terminal = true;
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this.slop = slop;
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this.boost = boost;
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this.termOrPhraseNumber = fieldQuery.nextTermOrPhraseNumber();
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private void markTerminal( int slop, float boost, int[] positions ){
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if (slop > this.slop || (slop == this.slop && boost > this.boost)) {
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this.terminal = true;
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this.slop = slop;
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this.boost = boost;
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this.termOrPhraseNumber = fieldQuery.nextTermOrPhraseNumber();
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this.positions = positions;
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}
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}
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public boolean isTerminal(){
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@ -435,15 +508,20 @@ public class FieldQuery {
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// if the candidate is a term, it is valid
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if( phraseCandidate.size() == 1 ) return true;
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assert phraseCandidate.size() == positions.length;
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// else check whether the candidate is valid phrase
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// compare position-gaps between terms to slop
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int pos = phraseCandidate.get( 0 ).getPosition();
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int totalDistance = 0;
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for( int i = 1; i < phraseCandidate.size(); i++ ){
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int nextPos = phraseCandidate.get( i ).getPosition();
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if( Math.abs( nextPos - pos - 1 ) > slop ) return false;
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final int expectedDelta = positions[i] - positions[i - 1];
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final int actualDelta = nextPos - pos;
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totalDistance += Math.abs(expectedDelta - actualDelta);
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pos = nextPos;
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}
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return true;
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return totalDistance <= slop;
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}
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}
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}
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@ -144,6 +144,13 @@ public class FieldTermStack {
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return termList.poll();
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}
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/**
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* Return the top TermInfo object of the stack without removing it.
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*/
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public TermInfo peek() {
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return termList.peek();
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}
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/**
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* @param termInfo the TermInfo object to be put on the top of the stack
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*/
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@ -16,10 +16,18 @@ package org.apache.lucene.search.vectorhighlight;
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* limitations under the License.
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*/
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import java.io.IOException;
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import java.io.Reader;
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import java.util.Arrays;
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import org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.analysis.MockAnalyzer;
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import org.apache.lucene.analysis.MockTokenFilter;
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import org.apache.lucene.analysis.MockTokenizer;
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import org.apache.lucene.analysis.TokenFilter;
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import org.apache.lucene.analysis.TokenStream;
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import org.apache.lucene.analysis.Tokenizer;
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import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
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import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute;
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import org.apache.lucene.document.Document;
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import org.apache.lucene.document.Field;
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import org.apache.lucene.document.FieldType;
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@ -27,12 +35,14 @@ import org.apache.lucene.document.TextField;
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import org.apache.lucene.index.DirectoryReader;
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import org.apache.lucene.index.IndexReader;
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import org.apache.lucene.index.IndexWriter;
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import org.apache.lucene.index.RandomIndexWriter;
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import org.apache.lucene.index.Term;
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import org.apache.lucene.queries.CommonTermsQuery;
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import org.apache.lucene.search.BooleanClause.Occur;
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import org.apache.lucene.search.BooleanQuery;
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import org.apache.lucene.search.IndexSearcher;
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import org.apache.lucene.search.PhraseQuery;
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import org.apache.lucene.search.Query;
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import org.apache.lucene.search.TermQuery;
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import org.apache.lucene.search.TopDocs;
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import org.apache.lucene.store.Directory;
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@ -40,7 +50,8 @@ import org.apache.lucene.util.LuceneTestCase;
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public class FastVectorHighlighterTest extends LuceneTestCase {
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private static final String FIELD = "text";
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public void testSimpleHighlightTest() throws IOException {
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Directory dir = newDirectory();
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@ -287,4 +298,128 @@ public class FastVectorHighlighterTest extends LuceneTestCase {
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writer.close();
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dir.close();
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}
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public void testOverlappingPhrases() throws IOException {
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final Analyzer analyzer = new Analyzer() {
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@Override
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protected TokenStreamComponents createComponents(String fieldName, Reader reader) {
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final Tokenizer source = new MockTokenizer(reader);
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TokenStream sink = source;
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sink = new SynonymFilter(sink);
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return new TokenStreamComponents(source, sink);
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}
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};
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final Directory directory = newDirectory();
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RandomIndexWriter iw = new RandomIndexWriter(random(), directory, analyzer);
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Document doc = new Document();
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FieldType withVectors = new FieldType(TextField.TYPE_STORED);
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withVectors.setStoreTermVectors(true);
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withVectors.setStoreTermVectorPositions(true);
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withVectors.setStoreTermVectorOffsets(true);
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doc.add(new Field(FIELD, "a b c", withVectors));
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iw.addDocument(doc);
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DirectoryReader ir = iw.getReader();
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// Disjunction of two overlapping phrase queries
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final PhraseQuery pq1 = new PhraseQuery();
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pq1.add(new Term(FIELD, "a"), 0);
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pq1.add(new Term(FIELD, "b"), 1);
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pq1.add(new Term(FIELD, "c"), 2);
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final PhraseQuery pq2 = new PhraseQuery();
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pq2.add(new Term(FIELD, "a"), 0);
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pq2.add(new Term(FIELD, "B"), 1);
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pq2.add(new Term(FIELD, "c"), 2);
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final BooleanQuery bq = new BooleanQuery();
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bq.add(pq1, Occur.SHOULD);
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bq.add(pq2, Occur.SHOULD);
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// Single phrase query with two terms at the same position
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final PhraseQuery pq = new PhraseQuery();
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pq.add(new Term(FIELD, "a"), 0);
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pq.add(new Term(FIELD, "b"), 1);
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pq.add(new Term(FIELD, "B"), 1);
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pq.add(new Term(FIELD, "c"), 2);
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for (Query query : Arrays.asList(pq1, pq2, bq, pq)) {
|
||||
assertEquals(1, new IndexSearcher(ir).search(bq, 1).totalHits);
|
||||
|
||||
FastVectorHighlighter highlighter = new FastVectorHighlighter();
|
||||
FieldQuery fieldQuery = highlighter.getFieldQuery(query, ir);
|
||||
String[] bestFragments = highlighter.getBestFragments(fieldQuery, ir, 0, FIELD, 1000, 1);
|
||||
assertEquals("<b>a b c</b>", bestFragments[0]);
|
||||
}
|
||||
|
||||
ir.close();
|
||||
iw.close();
|
||||
directory.close();
|
||||
}
|
||||
|
||||
public void testPhraseWithGap() throws IOException {
|
||||
final Directory directory = newDirectory();
|
||||
RandomIndexWriter iw = new RandomIndexWriter(random(), directory, new MockAnalyzer(random(), MockTokenizer.WHITESPACE, false));
|
||||
Document doc = new Document();
|
||||
FieldType withVectors = new FieldType(TextField.TYPE_STORED);
|
||||
withVectors.setStoreTermVectors(true);
|
||||
withVectors.setStoreTermVectorPositions(true);
|
||||
withVectors.setStoreTermVectorOffsets(true);
|
||||
doc.add(new Field(FIELD, "a b c", withVectors));
|
||||
iw.addDocument(doc);
|
||||
DirectoryReader ir = iw.getReader();
|
||||
|
||||
final PhraseQuery pq = new PhraseQuery();
|
||||
pq.add(new Term(FIELD, "c"), 2);
|
||||
pq.add(new Term(FIELD, "a"), 0);
|
||||
|
||||
assertEquals(1, new IndexSearcher(ir).search(pq, 1).totalHits);
|
||||
|
||||
FastVectorHighlighter highlighter = new FastVectorHighlighter();
|
||||
FieldQuery fieldQuery = highlighter.getFieldQuery(pq, ir);
|
||||
String[] bestFragments = highlighter.getBestFragments(fieldQuery, ir, 0, FIELD, 1000, 1);
|
||||
assertEquals("<b>a</b> b <b>c</b>", bestFragments[0]);
|
||||
|
||||
ir.close();
|
||||
iw.close();
|
||||
directory.close();
|
||||
}
|
||||
|
||||
// Simple token filter that adds 'B' as a synonym of 'b'
|
||||
private static class SynonymFilter extends TokenFilter {
|
||||
|
||||
final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
|
||||
final PositionIncrementAttribute posIncAtt = addAttribute(PositionIncrementAttribute.class);
|
||||
|
||||
State pending;
|
||||
|
||||
protected SynonymFilter(TokenStream input) {
|
||||
super(input);
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean incrementToken() throws IOException {
|
||||
if (pending != null) {
|
||||
restoreState(pending);
|
||||
termAtt.setEmpty().append('B');
|
||||
posIncAtt.setPositionIncrement(0);
|
||||
pending = null;
|
||||
return true;
|
||||
}
|
||||
if (!input.incrementToken()) {
|
||||
return false;
|
||||
}
|
||||
if (termAtt.toString().equals("b")) {
|
||||
pending = captureState();
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void reset() throws IOException {
|
||||
super.reset();
|
||||
pending = null;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -120,7 +120,31 @@ public class FieldPhraseListTest extends AbstractTestCase {
|
|||
assertEquals( 4, fpl.phraseList.get( 0 ).getStartOffset() );
|
||||
assertEquals( 9, fpl.phraseList.get( 0 ).getEndOffset() );
|
||||
}
|
||||
|
||||
|
||||
public void testProximityPhraseReverse() throws Exception {
|
||||
make1d1fIndex( "z a a b c" );
|
||||
|
||||
FieldQuery fq = new FieldQuery( pqF( 2F, 3, "c", "a" ), true, true );
|
||||
FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
|
||||
FieldPhraseList fpl = new FieldPhraseList( stack, fq );
|
||||
assertEquals( 1, fpl.phraseList.size() );
|
||||
assertEquals( "ac(2.0)((4,5)(8,9))", fpl.phraseList.get( 0 ).toString() );
|
||||
assertEquals( 4, fpl.phraseList.get( 0 ).getStartOffset() );
|
||||
assertEquals( 9, fpl.phraseList.get( 0 ).getEndOffset() );
|
||||
}
|
||||
|
||||
public void testProximityPhraseWithRepeatedTerms() throws Exception {
|
||||
make1d1fIndex( "z a a b b z d" );
|
||||
|
||||
FieldQuery fq = new FieldQuery( pqF( 2F, 2, "a", "b", "d" ), true, true );
|
||||
FieldTermStack stack = new FieldTermStack( reader, 0, F, fq );
|
||||
FieldPhraseList fpl = new FieldPhraseList( stack, fq );
|
||||
assertEquals( 1, fpl.phraseList.size() );
|
||||
assertEquals( "abd(2.0)((4,7)(12,13))", fpl.phraseList.get( 0 ).toString() );
|
||||
assertEquals( 4, fpl.phraseList.get( 0 ).getStartOffset() );
|
||||
assertEquals( 13, fpl.phraseList.get( 0 ).getEndOffset() );
|
||||
}
|
||||
|
||||
public void test2PhrasesOverlap() throws Exception {
|
||||
make1d1fIndex( "d a b c d" );
|
||||
|
||||
|
|
|
|||
|
|
@ -863,8 +863,8 @@ public class FieldQueryTest extends AbstractTestCase {
|
|||
phraseCandidate.add( new TermInfo( "c", 4, 5, 4, 1 ) );
|
||||
assertNull( fq.searchPhrase( F, phraseCandidate ) );
|
||||
|
||||
// "a b c"~1
|
||||
query = pqF( 1F, 1, "a", "b", "c" );
|
||||
// "a b c"~2
|
||||
query = pqF( 1F, 2, "a", "b", "c" );
|
||||
|
||||
// phraseHighlight = true, fieldMatch = true
|
||||
fq = new FieldQuery( query, true, true );
|
||||
|
|
|
|||
Loading…
Reference in New Issue