org.elasticsearch.index.query.SpanContainingQueryParser Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* 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.Query;
import org.apache.lucene.search.spans.SpanContainingQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.xcontent.XContentParser;
import java.io.IOException;
/**
* Parser for {@link SpanContainingQuery}
*/
public class SpanContainingQueryParser implements QueryParser {
public static final String NAME = "span_containing";
@Inject
public SpanContainingQueryParser() {
}
@Override
public String[] names() {
return new String[]{NAME};
}
@Override
public Query parse(QueryParseContext parseContext) throws IOException, QueryParsingException {
XContentParser parser = parseContext.parser();
float boost = 1.0f;
String queryName = null;
SpanQuery big = null;
SpanQuery little = 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_OBJECT) {
if ("big".equals(currentFieldName)) {
Query query = parseContext.parseInnerQuery();
if (!(query instanceof SpanQuery)) {
throw new QueryParsingException(parseContext, "span_containing [big] must be of type span query");
}
big = (SpanQuery) query;
} else if ("little".equals(currentFieldName)) {
Query query = parseContext.parseInnerQuery();
if (!(query instanceof SpanQuery)) {
throw new QueryParsingException(parseContext, "span_containing [little] must be of type span query");
}
little = (SpanQuery) query;
} else {
throw new QueryParsingException(parseContext, "[span_containing] query does not support [" + currentFieldName + "]");
}
} else if ("boost".equals(currentFieldName)) {
boost = parser.floatValue();
} else if ("_name".equals(currentFieldName)) {
queryName = parser.text();
} else {
throw new QueryParsingException(parseContext, "[span_containing] query does not support [" + currentFieldName + "]");
}
}
if (big == null) {
throw new QueryParsingException(parseContext, "span_containing must include [big]");
}
if (little == null) {
throw new QueryParsingException(parseContext, "span_containing must include [little]");
}
Query query = new SpanContainingQuery(big, little);
if (boost != 1.0F) {
query.setBoost(boost);
}
if (queryName != null) {
parseContext.addNamedQuery(queryName, query);
}
return query;
}
}