Re: re: struts vs ibatis - Integer type

[Rick Reumann]

I haven't tested this Integer Converter but this should work....

//CustomStringToIntegerConverter.java

import org.apache.commons.beanutils.Converter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class CustomStringToIntegerConverter implements Converter {
    
    public Object convert(Class type, Object value) {
        Integer theInteger = null;
        if (value != null && !value.toString().trim().equals("") &&  
           (value instanceof String && type == java.lang.Integer.class) ) {
               theInteger = Integer.valueOf( value );
           }
        }
        return theInteger;
    }
}

Then to implement, have a servlet listener that runs on start up and registers this converter and you are done:

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
 
public class YourServletContextListener implements ServletContextListener {
    
    public void contextDestroyed(ServletContextEvent contextEvent) {
        //might want to remove stuff when context destroyed
    }
 
    public void contextInitialized(ServletContextEvent contextEvent) {
        ServletContext context = contextEvent.getServletContext();
        try {
            ConvertUtils.register(new CustomStringToIntegerConverter(), Integer.class);
            
        } catch (Exception ex) {
            //log errors
        }
    }
}

In web.xml before servlet definitions:

<listener>
 <listener-class>com.whatever.YourServletContextListener</listener-class>
</listener>
--
Rick