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JdbcPetVisitExtractor.java
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JdbcPetVisitExtractor.java
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/*
* Copyright 2002-2015 the original author or authors.
*
* Licensed 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.springframework.samples.petclinic.repository.jdbc;
import org.springframework.data.jdbc.core.OneToManyResultSetExtractor;
import org.springframework.jdbc.core.ResultSetExtractor;
import org.springframework.samples.petclinic.model.Visit;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
* {@link ResultSetExtractor} implementation by using the
* {@link OneToManyResultSetExtractor} of Spring Data Core JDBC Extensions.
*/
public class JdbcPetVisitExtractor extends
OneToManyResultSetExtractor<JdbcPet, Visit, Integer> {
public JdbcPetVisitExtractor() {
super(new JdbcPetRowMapper(), new JdbcVisitRowMapper());
}
@Override
protected Integer mapPrimaryKey(ResultSet rs) throws SQLException {
return rs.getInt("pets.id");
}
@Override
protected Integer mapForeignKey(ResultSet rs) throws SQLException {
if (rs.getObject("visits.pet_id") == null) {
return null;
} else {
return rs.getInt("visits.pet_id");
}
}
@Override
protected void addChild(JdbcPet root, Visit child) {
root.addVisit(child);
}
}