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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.Query;
import org.apache.lucene.search.TermQuery;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.lucene.BytesRefs;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.mapper.MappedFieldType;
import java.io.IOException;
/**
*
*/
public class TermQueryParser implements QueryParser {
public static final String NAME = "term";
private static final ParseField NAME_FIELD = new ParseField("_name").withAllDeprecated("query name is not supported in short version of term query");
private static final ParseField BOOST_FIELD = new ParseField("boost").withAllDeprecated("boost is not supported in short version of term query");
@Inject
public TermQueryParser() {
}
@Override
public String[] names() {
return new String[]{NAME};
}
@Override
public Query parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
String queryName = null;
String fieldName = null;
Object value = null;
float boost = 1.0f;
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) {
// also support a format of "term" : {"field_name" : { ... }}
if (fieldName != null) {
throw new QueryParsingException(parseContext, "[term] query does not support different field names, use [bool] query instead");
}
fieldName = currentFieldName;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else {
if ("term".equals(currentFieldName)) {
value = parser.objectBytes();
} else if ("value".equals(currentFieldName)) {
value = parser.objectBytes();
} else if ("_name".equals(currentFieldName)) {
queryName = parser.text();
} else if ("boost".equals(currentFieldName)) {
boost = parser.floatValue();
} else {
throw new QueryParsingException(parseContext, "[term] query does not support [" + currentFieldName + "]");
}
}
}
} else if (token.isValue()) {
if (parseContext.parseFieldMatcher().match(currentFieldName, NAME_FIELD)) {
queryName = parser.text();
} else if (parseContext.parseFieldMatcher().match(currentFieldName, BOOST_FIELD)) {
boost = parser.floatValue();
} else {
if (fieldName != null) {
throw new QueryParsingException(parseContext, "[term] query does not support different field names, use [bool] query instead");
}
fieldName = currentFieldName;
value = parser.objectBytes();
}
} else if (token == XContentParser.Token.START_ARRAY) {
throw new QueryParsingException(parseContext, "[term] query does not support array of values");
}
}
if (value == null) {
throw new QueryParsingException(parseContext, "No value specified for term query");
}
Query query = null;
MappedFieldType fieldType = parseContext.fieldMapper(fieldName);
if (fieldType != null) {
query = fieldType.termQuery(value, parseContext);
}
if (query == null) {
query = new TermQuery(new Term(fieldName, BytesRefs.toBytesRef(value)));
}
query.setBoost(boost);
if (queryName != null) {
parseContext.addNamedQuery(queryName, query);
}
return query;
}
}