org.apache.solr.handler.CalciteJDBCStream Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.solr.handler;
import java.io.IOException;
import java.sql.Array;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.Properties;
import org.apache.solr.client.solrj.io.comp.StreamComparator;
import org.apache.solr.client.solrj.io.stream.JDBCStream;
/**
* Used with o.a.s.Handler.SQLHandler.
*
* @lucene.internal
* @since 7.0.0
*/
public class CalciteJDBCStream extends JDBCStream {
private static final long serialVersionUID = 1L;
public CalciteJDBCStream(String connectionUrl, String sqlQuery, StreamComparator definedSort,
Properties connectionProperties, String driverClassName) throws IOException {
super(connectionUrl, sqlQuery, definedSort, connectionProperties, driverClassName);
}
@Override
protected ResultSetValueSelector determineValueSelector(int columnIdx, ResultSetMetaData metadata)
throws SQLException {
ResultSetValueSelector valueSelector = super.determineValueSelector(columnIdx, metadata);
if (valueSelector == null) {
final int columnNumber = columnIdx + 1;
final String columnName = metadata.getColumnLabel(columnNumber);
final String className = metadata.getColumnClassName(columnNumber);
if (Array.class.getName().equals(className)) {
valueSelector = new ResultSetValueSelector() {
@Override
public Object selectValue(ResultSet resultSet) throws SQLException {
Object o = resultSet.getObject(columnNumber);
if (resultSet.wasNull()) {
return null;
}
if (o instanceof Array) {
Array array = (Array) o;
return array.getArray();
} else {
return o;
}
}
@Override
public String getColumnName() {
return columnName;
}
};
}
}
return valueSelector;
}
}