/*
* 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.jdbi.v3.core.array;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Collection;
import java.util.function.Supplier;
import org.jdbi.v3.core.statement.StatementContext;
import org.jdbi.v3.core.mapper.ColumnMapper;
class CollectionColumnMapper<T, C extends Collection<T>> implements ColumnMapper<C> {
private final ColumnMapper<T> elementMapper;
private final Supplier<C> collectionSupplier;
CollectionColumnMapper(ColumnMapper<T> elementMapper,
Supplier<C> collectionSupplier) {
this.elementMapper = elementMapper;
this.collectionSupplier = collectionSupplier;
}
@Override
public C map(ResultSet r, int columnNumber, StatementContext ctx) throws SQLException {
java.sql.Array array = r.getArray(columnNumber);
if (array == null) {
return null;
}
try {
return buildFromResultSet(array, ctx);
}
finally {
array.free();
}
}
private C buildFromResultSet(java.sql.Array array, StatementContext ctx) throws SQLException {
C result = collectionSupplier.get();
try (ResultSet rs = array.getResultSet()) {
while (rs.next()) {
result.add(elementMapper.map(rs, 2, ctx));
}
}
return result;
}
}