/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.index.Term;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.index.mapper.MapperService;
import java.io.IOException;
import java.util.List;
import static org.elasticsearch.common.collect.Lists.*;
import static org.elasticsearch.common.lucene.search.Queries.*;
import static org.elasticsearch.index.query.support.QueryParsers.*;
/**
* <pre>
* "terms" : {
* "field_name" : [ "value1", "value2" ]
* "minimum_match" : 1
* }
* </pre>
*
* @author kimchy (shay.banon)
*/
public class TermsQueryParser implements QueryParser {
public static final String NAME = "terms";
@Inject public TermsQueryParser() {
}
@Override public String[] names() {
return new String[]{NAME, "in"}; // allow both "in" and "terms" (since its similar to the "terms" filter)
}
@Override public Query parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
String fieldName = null;
boolean disableCoord = false;
float boost = 1.0f;
int minimumNumberShouldMatch = 1;
List<String> values = newArrayList();
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 == XContentParser.Token.START_ARRAY) {
fieldName = currentFieldName;
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
String value = parser.text();
if (value == null) {
throw new QueryParsingException(parseContext.index(), "No value specified for terms query");
}
values.add(value);
}
} else if (token.isValue()) {
if ("disable_coord".equals(currentFieldName) || "disableCoord".equals(currentFieldName)) {
disableCoord = parser.booleanValue();
} else if ("minimum_match".equals(currentFieldName) || "minimumMatch".equals(currentFieldName)) {
minimumNumberShouldMatch = parser.intValue();
} else if ("boost".equals(currentFieldName)) {
boost = parser.floatValue();
}
}
}
FieldMapper mapper = null;
MapperService.SmartNameFieldMappers smartNameFieldMappers = parseContext.smartFieldMappers(fieldName);
if (smartNameFieldMappers != null) {
if (smartNameFieldMappers.hasMapper()) {
mapper = smartNameFieldMappers.mapper();
}
}
BooleanQuery query = new BooleanQuery(disableCoord);
for (String value : values) {
if (mapper != null) {
query.add(new BooleanClause(mapper.fieldQuery(value, parseContext), BooleanClause.Occur.SHOULD));
} else {
query.add(new TermQuery(new Term(fieldName, value)), BooleanClause.Occur.SHOULD);
}
}
query.setBoost(boost);
if (minimumNumberShouldMatch != -1) {
query.setMinimumNumberShouldMatch(minimumNumberShouldMatch);
}
return wrapSmartNameQuery(optimizeQuery(fixNegativeQueryIfNeeded(query)), smartNameFieldMappers, parseContext);
}
}