/*
* 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.BooleanClause.Occur;
import org.apache.lucene.search.BooleanQuery;
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;
import java.util.ArrayList;
/**
*
*/
@Deprecated
public class OrQueryParser implements QueryParser {
public static final String NAME = "or";
private final DeprecationLogger deprecationLogger;
@Inject
public OrQueryParser() {
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 [or] query is deprecated, please use a [bool] query instead with [should] clauses.");
XContentParser parser = parseContext.parser();
ArrayList<Query> queries = new ArrayList<>();
boolean queriesFound = false;
String queryName = null;
String currentFieldName = null;
XContentParser.Token token = parser.currentToken();
if (token == XContentParser.Token.START_ARRAY) {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
queriesFound = true;
Query filter = parseContext.parseInnerFilter();
if (filter != null) {
queries.add(filter);
}
}
} else {
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token == XContentParser.Token.START_ARRAY) {
if ("filters".equals(currentFieldName)) {
queriesFound = true;
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
Query filter = parseContext.parseInnerFilter();
if (filter != null) {
queries.add(filter);
}
}
} else {
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
queriesFound = true;
Query filter = parseContext.parseInnerFilter();
if (filter != null) {
queries.add(filter);
}
}
}
} else if (token.isValue()) {
if ("_name".equals(currentFieldName)) {
queryName = parser.text();
} else {
throw new QueryParsingException(parseContext, "[or] query does not support [" + currentFieldName + "]");
}
}
}
}
if (!queriesFound) {
throw new QueryParsingException(parseContext, "[or] query requires 'filters' to be set on it'");
}
if (queries.isEmpty()) {
return null;
}
BooleanQuery.Builder queryBuilder = new BooleanQuery.Builder();
for (Query f : queries) {
queryBuilder.add(f, Occur.SHOULD);
}
BooleanQuery query = queryBuilder.build();
if (queryName != null) {
parseContext.addNamedQuery(queryName, query);
}
return query;
}
}