/*
* 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.queryParser.MapperQueryParser;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.QueryParserSettings;
import org.apache.lucene.search.Query;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.query.support.QueryParsers;
import java.io.IOException;
import static org.elasticsearch.common.lucene.search.Queries.*;
/**
* @author kimchy (shay.banon)
*/
public class FieldQueryParser implements QueryParser {
public static final String NAME = "field";
@Inject public FieldQueryParser() {
}
@Override public String[] names() {
return new String[]{NAME};
}
@Override public Query parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
XContentParser.Token token = parser.nextToken();
assert token == XContentParser.Token.FIELD_NAME;
String fieldName = parser.currentName();
QueryParserSettings qpSettings = new QueryParserSettings();
qpSettings.defaultField(fieldName);
token = parser.nextToken();
if (token == XContentParser.Token.START_OBJECT) {
String currentFieldName = null;
while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
if (token == XContentParser.Token.FIELD_NAME) {
currentFieldName = parser.currentName();
} else if (token.isValue()) {
if ("query".equals(currentFieldName)) {
qpSettings.queryString(parser.text());
} else if ("boost".equals(currentFieldName)) {
qpSettings.boost(parser.floatValue());
} else if ("enable_position_increments".equals(currentFieldName) || "enablePositionIncrements".equals(currentFieldName)) {
qpSettings.enablePositionIncrements(parser.booleanValue());
} else if ("allow_leading_wildcard".equals(currentFieldName) || "allowLeadingWildcard".equals(currentFieldName)) {
qpSettings.allowLeadingWildcard(parser.booleanValue());
} else if ("auto_generate_phrase_queries".equals(currentFieldName) || "autoGeneratePhraseQueries".equals(currentFieldName)) {
qpSettings.autoGeneratePhraseQueries(parser.booleanValue());
} else if ("lowercase_expanded_terms".equals(currentFieldName) || "lowercaseExpandedTerms".equals(currentFieldName)) {
qpSettings.lowercaseExpandedTerms(parser.booleanValue());
} else if ("phrase_slop".equals(currentFieldName) || "phraseSlop".equals(currentFieldName)) {
qpSettings.phraseSlop(parser.intValue());
} else if ("analyzer".equals(currentFieldName)) {
qpSettings.analyzer(parseContext.analysisService().analyzer(parser.text()));
} else if ("default_operator".equals(currentFieldName) || "defaultOperator".equals(currentFieldName)) {
String op = parser.text();
if ("or".equalsIgnoreCase(op)) {
qpSettings.defaultOperator(org.apache.lucene.queryParser.QueryParser.Operator.OR);
} else if ("and".equalsIgnoreCase(op)) {
qpSettings.defaultOperator(org.apache.lucene.queryParser.QueryParser.Operator.AND);
} else {
throw new QueryParsingException(parseContext.index(), "Query default operator [" + op + "] is not allowed");
}
} else if ("fuzzy_min_sim".equals(currentFieldName) || "fuzzyMinSim".equals(currentFieldName)) {
qpSettings.fuzzyMinSim(parser.floatValue());
} else if ("fuzzy_prefix_length".equals(currentFieldName) || "fuzzyPrefixLength".equals(currentFieldName)) {
qpSettings.fuzzyPrefixLength(parser.intValue());
} else if ("escape".equals(currentFieldName)) {
qpSettings.escape(parser.booleanValue());
} else if ("analyze_wildcard".equals(currentFieldName) || "analyzeWildcard".equals(currentFieldName)) {
qpSettings.analyzeWildcard(parser.booleanValue());
} else if ("rewrite".equals(currentFieldName)) {
qpSettings.rewriteMethod(QueryParsers.parseRewriteMethod(parser.textOrNull()));
}
}
}
parser.nextToken();
} else {
qpSettings.queryString(parser.text());
// move to the next token
parser.nextToken();
}
if (qpSettings.analyzer() == null) {
qpSettings.analyzer(parseContext.mapperService().searchAnalyzer());
}
if (qpSettings.queryString() == null) {
throw new QueryParsingException(parseContext.index(), "No value specified for term query");
}
if (qpSettings.escape()) {
qpSettings.queryString(org.apache.lucene.queryParser.QueryParser.escape(qpSettings.queryString()));
}
Query query = parseContext.indexCache().queryParserCache().get(qpSettings);
if (query != null) {
return query;
}
MapperQueryParser queryParser = parseContext.singleQueryParser(qpSettings);
try {
query = queryParser.parse(qpSettings.queryString());
query.setBoost(qpSettings.boost());
query = optimizeQuery(fixNegativeQueryIfNeeded(query));
parseContext.indexCache().queryParserCache().put(qpSettings, query);
return query;
} catch (ParseException e) {
throw new QueryParsingException(parseContext.index(), "Failed to parse query [" + qpSettings.queryString() + "]", e);
}
}
}