Introducing Spring Framework

Chapter 9 ■ Adding Persistence to Your Spring Application
}
}
documents = engine.listAll();
assertNotNull(documents);
assertTrue(documents.size() == 4);
That’s it! As you can see, the unit test (see Listing 9-14) didn’t change at all, and if you run it, the test should pass
without any problems.
A New Way to Collect Data: JdbcTemplate and RowMapper
Reviewing your DocumentDAO implementation (see Listing 9-13), you have a lot of code still. The good news is that
Spring Framework provides a JdbcTemplate that can help you to execute any query and map the document class by
implementing a RowMapper class, but how you can accomplish this? How can you reduce all this code? Well, let’s look
at Listing 9-15; it shows you how to use the JdbcTemplate.
Listing 9-15. DocumentJdbcTemplateRepository.java
package com.apress.isf.spring.jdbc;
import java.util.List;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
import com.apress.isf.java.model.Document;
import com.apress.isf.spring.data.DocumentDAO;
public class DocumentJdbcTemplateRepository implements DocumentDAO {
}
private JdbcTemplate jdbcTemplate;
private DataSource dataSource;
private String query;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplate = new JdbcTemplate(this.dataSource);
}
public void setQuery(String query){
this.query = query;
}
public List getAll() {
return jdbcTemplate.query(query, new DocumentRowMapper());
}
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