/*
* 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.apache.lucene.search.ConstantScoreQuery;
import org.apache.lucene.search.Query;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.logging.DeprecationLogger;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.xcontent.XContentParser;
import java.io.IOException;
/**
* The "fquery" filter is the same as the {@link QueryFilterParser} except that it allows also to
* associate a name with the query filter.
*/
@Deprecated
public class FQueryFilterParser implements QueryParser {
public static final String NAME = "fquery";
private final DeprecationLogger deprecationLogger;
@Inject
public FQueryFilterParser() {
ESLogger logger = Loggers.getLogger(getClass());
deprecationLogger = new DeprecationLogger(logger);
}
@Override
public String[] names() {
return new String[]{NAME};
}
@Override
public Query parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
deprecationLogger.deprecated("The [fquery] filter is deprecated, you can now use queries as filters directly.");
XContentParser parser = parseContext.parser();
Query query = null;
boolean queryFound = false;
String queryName = null;
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 (parseContext.isDeprecatedSetting(currentFieldName)) {
// skip
} else if (token == XContentParser.Token.START_OBJECT) {
if ("query".equals(currentFieldName)) {
queryFound = true;
query = parseContext.parseInnerQuery();
} else {
throw new QueryParsingException(parseContext, "[fquery] query does not support [" + currentFieldName + "]");
}
} else if (token.isValue()) {
if ("_name".equals(currentFieldName)) {
queryName = parser.text();
} else {
throw new QueryParsingException(parseContext, "[fquery] query does not support [" + currentFieldName + "]");
}
}
}
if (!queryFound) {
throw new QueryParsingException(parseContext, "[fquery] requires 'query' element");
}
if (query == null) {
return null;
}
query = new ConstantScoreQuery(query);
if (queryName != null) {
parseContext.addNamedQuery(queryName, query);
}
return query;
}
}