org.elasticsearch.index.query.functionscore.script.ScriptScoreFunctionBuilder 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.script;
import org.elasticsearch.index.query.functionscore.ScoreFunctionBuilder;
import com.google.common.collect.Maps;
import org.elasticsearch.common.xcontent.XContentBuilder;
import java.io.IOException;
import java.util.Map;
/**
* A function that uses a script to compute or influence the score of documents
* that match with the inner query or filter.
*/
public class ScriptScoreFunctionBuilder implements ScoreFunctionBuilder {
private String script;
private String lang;
private Map params = null;
public ScriptScoreFunctionBuilder() {
}
public ScriptScoreFunctionBuilder script(String script) {
this.script = script;
return this;
}
/**
* Sets the language of the script.
*/
public ScriptScoreFunctionBuilder lang(String lang) {
this.lang = lang;
return this;
}
/**
* Additional parameters that can be provided to the script.
*/
public ScriptScoreFunctionBuilder params(Map params) {
if (this.params == null) {
this.params = params;
} else {
this.params.putAll(params);
}
return this;
}
/**
* Additional parameters that can be provided to the script.
*/
public ScriptScoreFunctionBuilder param(String key, Object value) {
if (params == null) {
params = Maps.newHashMap();
}
params.put(key, value);
return this;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(getName());
builder.field("script", script);
if (lang != null) {
builder.field("lang", lang);
}
if (this.params != null) {
builder.field("params", this.params);
}
return builder.endObject();
}
@Override
public String getName() {
return ScriptScoreFunctionParser.NAMES[0];
}
}