/*
* 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;
import org.elasticsearch.common.xcontent.XContentBuilder;
import java.io.IOException;
/**
* Constructs a query that only match on documents that the field has a value in them.
*/
public class ExistsQueryBuilder extends QueryBuilder {
private String name;
private String queryName;
public ExistsQueryBuilder(String name) {
this.name = name;
}
/**
* Sets the query name for the query that can be used when searching for matched_queries per hit.
*/
public ExistsQueryBuilder queryName(String queryName) {
this.queryName = queryName;
return this;
}
@Override
protected void doXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject(ExistsQueryParser.NAME);
builder.field("field", name);
if (queryName != null) {
builder.field("_name", queryName);
}
builder.endObject();
}
}