Package org.springframework.xd.jdbc

Source Code of org.springframework.xd.jdbc.NamedColumnJdbcItemReader

/*
* Copyright 2014 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.xd.jdbc;

import org.springframework.batch.item.database.JdbcCursorItemReader;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.support.JdbcUtils;
import org.springframework.xd.tuple.Tuple;
import org.springframework.xd.tuple.TupleBuilder;

import java.sql.ResultSet;
import java.sql.SQLException;

/**
* Reader which reads a row from a database as a delimited string from a
* predefined list of column names.
*
* @author Luke Taylor
* @author Thomas Risberg
*/
public class NamedColumnJdbcItemReader extends JdbcCursorItemReader<Tuple> {

  @Override
  public void afterPropertiesSet() throws Exception {
    setRowMapper(new RowMapper<Tuple>() {
      @Override
      public Tuple mapRow(ResultSet rs, int rowNum) throws SQLException {
        TupleBuilder builder = TupleBuilder.tuple();

        for (int i=1; i <= rs.getMetaData().getColumnCount(); i++) {
          String name = JdbcUtils.lookupColumnName(rs.getMetaData(), i);
          builder.put(name, JdbcUtils.getResultSetValue(rs, i, String.class));
        }

        return builder.build();
      }
    });

    super.afterPropertiesSet();
  }
}
TOP

Related Classes of org.springframework.xd.jdbc.NamedColumnJdbcItemReader

TOP
Copyright © 2018 www.massapi.com. All rights reserved.
All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.