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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.random;
import org.elasticsearch.common.ParsingException;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.query.QueryParseContext;
import org.elasticsearch.index.query.functionscore.ScoreFunctionParser;
import java.io.IOException;
public class RandomScoreFunctionParser implements ScoreFunctionParser<RandomScoreFunctionBuilder> {
public static String[] NAMES = { "random_score", "randomScore" };
private static RandomScoreFunctionBuilder PROTOTYPE = new RandomScoreFunctionBuilder();
@Inject
public RandomScoreFunctionParser() {
}
@Override
public String[] getNames() {
return NAMES;
}
@Override
public RandomScoreFunctionBuilder fromXContent(QueryParseContext parseContext, XContentParser parser) throws IOException, ParsingException {
RandomScoreFunctionBuilder randomScoreFunctionBuilder = new RandomScoreFunctionBuilder();
String currentFieldName = null;
XContentParser.Token token;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token.isValue()) {
if ("seed".equals(currentFieldName)) {
if (token == XContentParser.Token.VALUE_NUMBER) {
if (parser.numberType() == XContentParser.NumberType.INT) {
randomScoreFunctionBuilder.seed(parser.intValue());
} else if (parser.numberType() == XContentParser.NumberType.LONG) {
randomScoreFunctionBuilder.seed(parser.longValue());
} else {
throw new ParsingException(parser.getTokenLocation(), "random_score seed must be an int, long or string, not '"
+ token.toString() + "'");
}
} else if (token == XContentParser.Token.VALUE_STRING) {
randomScoreFunctionBuilder.seed(parser.text());
} else {
throw new ParsingException(parser.getTokenLocation(), "random_score seed must be an int/long or string, not '"
+ token.toString() + "'");
}
} else {
throw new ParsingException(parser.getTokenLocation(), NAMES[0] + " query does not support [" + currentFieldName + "]");
}
}
}
return randomScoreFunctionBuilder;
}
@Override
public RandomScoreFunctionBuilder getBuilderPrototype() {
return PROTOTYPE;
}
}
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