org.elasticsearch.hadoop.rest.query.QueryBuilder Maven / Gradle / Ivy
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* Licensed to Elasticsearch under one or more contributor
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* 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
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* under the License.
*/
package org.elasticsearch.hadoop.rest.query;
import org.elasticsearch.hadoop.serialization.Generator;
import org.elasticsearch.hadoop.serialization.json.JacksonJsonGenerator;
import org.elasticsearch.hadoop.util.FastByteArrayOutputStream;
/**
* QueryBuilder for Elasticsearch query DSL
*/
public abstract class QueryBuilder {
/**
* Converts this QueryBuilder to a JSON string.
*
* @param out The JSON generator
* @return The JSON string which represents the query
*/
public abstract void toJson(Generator out);
@Override
public String toString() {
FastByteArrayOutputStream out = new FastByteArrayOutputStream(256);
JacksonJsonGenerator generator = new JacksonJsonGenerator(out);
generator.writeBeginObject();
toJson(generator);
generator.writeEndObject();
generator.close();
return out.toString();
}
}