Spring 5 Design Patterns

Implementing ResultSetExtractor

Spring provides a ResultSetExtractor interface for processing an entire ResultSet at once. Here, you are responsible for iterating the ResultSet, for example, for mapping the entire ResultSet to a single object. Let's see the following example:

    public interface ResultSetExtractor<T> { 
      T extractData(ResultSet rs) throws SQLException,      DataAccessException; 
    } 

Example for using a ResultSetExtractor

The following line of code implements the ResultSetExtractor interface in the application:

 package com.packt.patterninspring.chapter7.bankapp.callbacks; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import org.springframework.dao.DataAccessException; import ...