// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchdefinition.processing;
import com.yahoo.config.application.api.DeployLogger;
import com.yahoo.searchdefinition.RankProfileRegistry;
import com.yahoo.document.CollectionDataType;
import com.yahoo.document.DataType;
import com.yahoo.searchdefinition.Search;
import com.yahoo.searchdefinition.document.Matching;
import com.yahoo.searchdefinition.document.SDField;
import com.yahoo.searchdefinition.document.Stemming;
import com.yahoo.vespa.indexinglanguage.ExpressionConverter;
import com.yahoo.vespa.indexinglanguage.ExpressionVisitor;
import com.yahoo.vespa.indexinglanguage.expressions.Expression;
import com.yahoo.vespa.indexinglanguage.expressions.ForEachExpression;
import com.yahoo.vespa.indexinglanguage.expressions.IndexExpression;
import com.yahoo.vespa.indexinglanguage.expressions.OutputExpression;
import com.yahoo.vespa.indexinglanguage.expressions.ScriptExpression;
import com.yahoo.vespa.indexinglanguage.expressions.SummaryExpression;
import com.yahoo.vespa.indexinglanguage.expressions.TokenizeExpression;
import com.yahoo.vespa.indexinglanguage.linguistics.AnnotatorConfig;
import com.yahoo.vespa.model.container.search.QueryProfiles;
import java.util.Set;
import java.util.TreeSet;
/**
* @author Simon Thoresen
*/
public class TextMatch extends Processor {
public TextMatch(Search search, DeployLogger deployLogger, RankProfileRegistry rankProfileRegistry, QueryProfiles queryProfiles) {
super(search, deployLogger, rankProfileRegistry, queryProfiles);
}
@Override
public void process() {
for (SDField field : search.allConcreteFields()) {
if (field.getMatching().getType() != Matching.Type.TEXT) {
continue;
}
ScriptExpression script = field.getIndexingScript();
if (script == null) {
continue;
}
DataType fieldType = field.getDataType();
if (fieldType instanceof CollectionDataType) {
fieldType = ((CollectionDataType)fieldType).getNestedType();
}
if (fieldType != DataType.STRING) {
continue;
}
Set dynamicSummary = new TreeSet<>();
Set staticSummary = new TreeSet<>();
new IndexingOutputs(search, deployLogger, rankProfileRegistry, queryProfiles).findSummaryTo(search, field, dynamicSummary, staticSummary);
MyVisitor visitor = new MyVisitor(dynamicSummary);
visitor.visit(script);
if (!visitor.requiresTokenize) {
continue;
}
ExpressionConverter converter = new MyStringTokenizer(search, findAnnotatorConfig(search, field));
field.setIndexingScript((ScriptExpression)converter.convert(script));
}
}
private static AnnotatorConfig findAnnotatorConfig(Search search, SDField field) {
AnnotatorConfig ret = new AnnotatorConfig();
Stemming activeStemming = field.getStemming();
if (activeStemming == null) {
activeStemming = search.getStemming();
}
ret.setStemMode(activeStemming.toStemMode());
ret.setRemoveAccents(field.getNormalizing().doRemoveAccents());
if ((field.getMatching() != null) && (field.getMatching().maxLength() != null)) {
ret.setMaxTokenLength(field.getMatching().maxLength());
}
return ret;
}
private static class MyVisitor extends ExpressionVisitor {
final Set dynamicSummaryFields;
boolean requiresTokenize = false;
MyVisitor(Set dynamicSummaryFields) {
this.dynamicSummaryFields = dynamicSummaryFields;
}
@Override
protected void doVisit(Expression exp) {
if (exp instanceof IndexExpression) {
requiresTokenize = true;
}
if (exp instanceof SummaryExpression &&
dynamicSummaryFields.contains(((SummaryExpression)exp).getFieldName()))
{
requiresTokenize = true;
}
}
}
private static class MyStringTokenizer extends TypedTransformProvider {
final AnnotatorConfig annotatorCfg;
MyStringTokenizer(Search search, AnnotatorConfig annotatorCfg) {
super(TokenizeExpression.class, search);
this.annotatorCfg = annotatorCfg;
}
@Override
protected boolean requiresTransform(Expression exp, DataType fieldType) {
return exp instanceof OutputExpression;
}
@Override
protected Expression newTransform(DataType fieldType) {
Expression exp = new TokenizeExpression(null, annotatorCfg);
if (fieldType instanceof CollectionDataType) {
exp = new ForEachExpression(exp);
}
return exp;
}
}
}