org.elasticsearch.index.query.functionscore.FunctionScoreQueryBuilder Maven / Gradle / Ivy
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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.index.query.functionscore;
import org.elasticsearch.common.lucene.search.function.CombineFunction;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.index.query.BaseQueryBuilder;
import org.elasticsearch.index.query.BoostableQueryBuilder;
import org.elasticsearch.index.query.FilterBuilder;
import org.elasticsearch.index.query.QueryBuilder;
import java.io.IOException;
import java.util.ArrayList;
/**
* A query that uses a filters with a script associated with them to compute the
* score.
*/
public class FunctionScoreQueryBuilder extends BaseQueryBuilder implements BoostableQueryBuilder {
private final QueryBuilder queryBuilder;
private final FilterBuilder filterBuilder;
private Float boost;
private Float maxBoost;
private String scoreMode;
private String boostMode;
private ArrayList filters = new ArrayList();
private ArrayList scoreFunctions = new ArrayList();
public FunctionScoreQueryBuilder(QueryBuilder queryBuilder) {
this.queryBuilder = queryBuilder;
this.filterBuilder = null;
}
public FunctionScoreQueryBuilder(FilterBuilder filterBuilder) {
this.filterBuilder = filterBuilder;
this.queryBuilder = null;
}
public FunctionScoreQueryBuilder() {
this.filterBuilder = null;
this.queryBuilder = null;
}
public FunctionScoreQueryBuilder(ScoreFunctionBuilder scoreFunctionBuilder) {
queryBuilder = null;
filterBuilder = null;
this.filters.add(null);
this.scoreFunctions.add(scoreFunctionBuilder);
}
public FunctionScoreQueryBuilder add(FilterBuilder filter, ScoreFunctionBuilder scoreFunctionBuilder) {
this.filters.add(filter);
this.scoreFunctions.add(scoreFunctionBuilder);
return this;
}
public FunctionScoreQueryBuilder add(ScoreFunctionBuilder scoreFunctionBuilder) {
this.filters.add(null);
this.scoreFunctions.add(scoreFunctionBuilder);
return this;
}
public FunctionScoreQueryBuilder scoreMode(String scoreMode) {
this.scoreMode = scoreMode;
return this;
}
public FunctionScoreQueryBuilder boostMode(String boostMode) {
this.boostMode = boostMode;
return this;
}
public FunctionScoreQueryBuilder boostMode(CombineFunction combineFunction) {
this.boostMode = combineFunction.getName();
return this;
}
public FunctionScoreQueryBuilder maxBoost(float maxBoost) {
this.maxBoost = maxBoost;
return this;
}
/**
* Sets the boost for this query. Documents matching this query will (in
* addition to the normal weightings) have their score multiplied by the
* boost provided.
*/
public FunctionScoreQueryBuilder boost(float boost) {
this.boost = boost;
return this;
}
@Override
protected void doXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(FunctionScoreQueryParser.NAME);
if (queryBuilder != null) {
builder.field("query");
queryBuilder.toXContent(builder, params);
} else if (filterBuilder != null) {
builder.field("filter");
filterBuilder.toXContent(builder, params);
}
// If there is only one function without a filter, we later want to
// create a FunctionScoreQuery.
// For this, we only build the scoreFunction.Tthis will be translated to
// FunctionScoreQuery in the parser.
if (filters.size() == 1 && filters.get(0) == null) {
scoreFunctions.get(0).toXContent(builder, params);
} else { // in all other cases we build the format needed for a
// FiltersFunctionScoreQuery
builder.startArray("functions");
for (int i = 0; i < filters.size(); i++) {
builder.startObject();
if (filters.get(i) != null) {
builder.field("filter");
filters.get(i).toXContent(builder, params);
}
scoreFunctions.get(i).toXContent(builder, params);
builder.endObject();
}
builder.endArray();
}
if (scoreMode != null) {
builder.field("score_mode", scoreMode);
}
if (boostMode != null) {
builder.field("boost_mode", boostMode);
}
if (maxBoost != null) {
builder.field("max_boost", maxBoost);
}
if (boost != null) {
builder.field("boost", boost);
}
builder.endObject();
}
}