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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;
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.lucene.BytesRefs;
import org.elasticsearch.common.lucene.search.Queries;
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 com.google.common.collect.Lists.newArrayList;
import static org.elasticsearch.common.lucene.search.Queries.fixNegativeQueryIfNeeded;
import static org.elasticsearch.index.query.support.QueryParsers.wrapSmartNameQuery;
/**
* <pre>
* "terms" : {
* "field_name" : [ "value1", "value2" ]
* "minimum_match" : 1
* }
* </pre>
*/
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;
String minimumShouldMatch = null;
List<Object> values = newArrayList();
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 (token == XContentParser.Token.START_ARRAY) {
if (fieldName != null) {
throw new QueryParsingException(parseContext.index(), "[terms] query does not support multiple fields");
}
fieldName = currentFieldName;
while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
Object value = parser.objectBytes();
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)) {
minimumShouldMatch = parser.textOrNull();
} else if ("minimum_should_match".equals(currentFieldName) || "minimumShouldMatch".equals(currentFieldName)) {
minimumShouldMatch = parser.textOrNull();
} else if ("boost".equals(currentFieldName)) {
boost = parser.floatValue();
} else if ("_name".equals(currentFieldName)) {
queryName = parser.text();
} else {
throw new QueryParsingException(parseContext.index(), "[terms] query does not support [" + currentFieldName + "]");
}
} else {
throw new QueryParsingException(parseContext.index(), "[terms] query does not support [" + currentFieldName + "]");
}
}
if (fieldName == null) {
throw new QueryParsingException(parseContext.index(), "No field specified for terms query");
}
FieldMapper mapper = null;
MapperService.SmartNameFieldMappers smartNameFieldMappers = parseContext.smartFieldMappers(fieldName);
String[] previousTypes = null;
if (smartNameFieldMappers != null && smartNameFieldMappers.hasMapper()) {
mapper = smartNameFieldMappers.mapper();
if (smartNameFieldMappers.explicitTypeInNameWithDocMapper()) {
previousTypes = QueryParseContext.setTypesWithPrevious(new String[]{smartNameFieldMappers.docMapper().type()});
}
}
try {
BooleanQuery booleanQuery = new BooleanQuery(disableCoord);
for (Object value : values) {
if (mapper != null) {
booleanQuery.add(new BooleanClause(mapper.termQuery(value, parseContext), BooleanClause.Occur.SHOULD));
} else {
booleanQuery.add(new TermQuery(new Term(fieldName, BytesRefs.toString(value))), BooleanClause.Occur.SHOULD);
}
}
booleanQuery.setBoost(boost);
Queries.applyMinimumShouldMatch(booleanQuery, minimumShouldMatch);
Query query = wrapSmartNameQuery(fixNegativeQueryIfNeeded(booleanQuery), smartNameFieldMappers, parseContext);
if (queryName != null) {
parseContext.addNamedQuery(queryName, query);
}
return query;
} finally {
if (smartNameFieldMappers != null && smartNameFieldMappers.explicitTypeInNameWithDocMapper()) {
QueryParseContext.setTypes(previousTypes);
}
}
}
}